文章目录

  • 目录

    一、功能介绍

    ER图

    系统结构图

    登录界面

    学生登录

    管理员登录

    学生信息管理

    学生成绩管理

    二、局部功能实现

    1.View类

    登录界面

    单选框添加监听事件

    注册界面

    提示框界面

    学生操作界面

    个人信息查询界面

    个人成绩查询界面

    退出登陆

    管理员操作界面

    名字模糊查询表单

    学生信息管理

    学生成绩管理

    2.Connect类

    简单封装

    增、删、改

    登录功能

    学号查询与成绩查询

    表单中学生类初始化

    模糊查询

    3.学生类

    三.总代码

    1.View类

    2.Student

    4.Main

前言

最近初学MySQL，利用MySQL与Javafx写了一个小型学生信息管理系统。因为是初学，在很多方面做的还是有一些不足。在写的过程中，也借鉴了其它博主的一些思路，但大部分代码都是自己写的。（不然代码结构也不会这么拉跨）

由于很多地方代码都是嵌套的，所以在文章前面的代码中可能会看着有点乱。如果觉得代码乱的话，可以直接看最后的总码。

提示：以下是本篇文章正文内容，下面案例可供参考

一、功能介绍

ER图

系统结构图

登录界面

当单选按钮为学生时，可以登录与注册，当单选按钮为管理员时，只能登录。

学生登录

学生账号登录后可以查看自己的个人信息与成绩

个人信息

学生本人成绩

管理员登录

管理员可以增、删、改、查、所有的学生的信息与成绩,并在修改与增加新数据时进行一定的校验

学生信息管理

  1. 实现了对学生姓名进行模糊查询
  2. 并且在点击某一行数据时，会对数据暂时储存，在点击修改时能使文本框初始值为刚才点击的那一行的数据（这一功能我还是觉得很赞的）

学生成绩管理

实现功能:

  1. 多表查询
  2. 模糊查询
  3. 多条件查询
  4. 同上2

二、局部功能实现

1.View类

这个类写的并不好，甚至有点糟糕，写代码时想要偷懒没有将视图与功能分离出去。以至于现在想要再分离出去需要耗费大量时间，这次引以为戒，下次注意。

下面先单独讲几个我认为不错的地方：

  1. 单选框添加监听事件
  2. 表单
  3. 获取行数据

登录界面

当用户成功登录后，登录界面消失，新的界面出现。于是我将一个舞台对象设为了静态，做为主舞台来使用。

图片路径推荐使用相对路径，但我在idea中用相对路径时，总是找不到文件，多次尝试未果，我才使用了绝对路径。

//主舞台
private static Stage stage;//背景图片
private static Image img=new Image("D:\\JAVA\\id\\JavaFX\\image\\bg1.jpg");public void start(Stage stage)throws Exception{//将舞台赋值给静态属性View.stage=stage;stage.setTitlt("学生信息管理系统");//设置窗口大小不可调节stage.setResizable(false);//登录login();stage.show();
}static void login() {//        新建布局GridPane gp = new GridPane();
//        设置居中方式gp.setAlignment(Pos.CENTER);
//        调整空隙gp.setHgap(10);gp.setVgap(20);
//        新建文本标签Label l1 = new Label("学号");TextField idt = new TextField();//        用户密码Label l2 = new Label("密码");//        字体Font fon1 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 20);l1.setFont(fon1);l2.setFont(fon1);
//        新建密码框PasswordField pwd = new PasswordField();
//        按钮的创建Button b1 = new Button("登录");Button b2 = new Button("注册");//        单选框：学生，老师ToggleGroup group = new ToggleGroup();RadioButton student = new RadioButton("学生");RadioButton manager = new RadioButton("管理员");HBox h1 = new HBox();student.setToggleGroup(group);manager.setToggleGroup(group);h1.getChildren().addAll(student, manager);//        背景图片gp.setBackground(bGround);//        添加画板gp.add(l1, 0, 0);gp.add(idt, 1, 0);gp.add(l2, 0, 1);gp.add(pwd, 1, 1);gp.add(b1, 0, 2);gp.add(b2, 1, 2);gp.add(h1, 1, 3);Scene sc = new Scene(gp, 400, 300);stage.setScene(sc);}}

单选框添加监听事件

我想要实现当在登陆页面点击学生或管理员时，界面会发生一定的改变。在尝试了很多代码后，我了解到，想要在未点击按钮时获取单选按钮选中情况，需要给单选按钮添加监听事件。

代码实现：

//创建单选框 :学生，管理员
ToggleGroup group = new ToggleGroup();
RadioButton student =new RadioButton("学生");
RadioButton manager =new RadioButton("管理员");//将学生 管理员 绑定
student.setToggleGroup(group);
manager.setToggleGroup(group);//        添加单选按钮监听
group.selectedToggleProperty().addListener((observable, oldValue, newValue) -> {if(newValue.equals(student)){     //如果学生被选中l1.setText("学号");//点击后界面}else if (newValue.eauals(manager)){   //如果管理员被选中//隐藏注册按钮b2.setVisible(false);l1.setText("姓名");//点击后界面}
});//创建水平布局，将学生，管理员单选按钮放入
HBox h1=new HBox();
h1.getChildren().addAll(student, manager);

效果展示：

当选择学生时

当选择管理员时

注册界面

注册方法和管理员登陆后的“增加”功能原理一直，出于偷懒，我使用的是相同的方法。

我在注册这里添加了一些简单的判断，实现了如下简单功能：

  • 对输入数据进行一些简单的限制，性别只能填男、女，电话只能为11位，任何框不能输入为空。
  • 当在登录界面多次点击注册按钮后，只会生成一个登录页面。
  • 当注册成功或失败时，只会弹出一个提示框
    //    增加界面static void add(BorderPane bp) {anum++;GridPane gp = new GridPane();
//        设置间距gp.setVgap(10);gp.setHgap(10);gp.setAlignment(Pos.CENTER);
//        文本Label l1 = new Label("姓名");Label l2 = new Label("性别");Label l3 = new Label("班级");Label l4 = new Label("地址");Label l5 = new Label("年龄");Label l6 = new Label("电话");Label l7 = new Label("密码");Label l8=new Label("确认密码");Button b1 = new Button("提交");//        文本框TextField t1 = new TextField();TextField t2 = new TextField();TextField t3 = new TextField();TextField t4 = new TextField();TextField t5 = new TextField();TextField t6 = new TextField();PasswordField t7 = new PasswordField();PasswordField t8=new PasswordField();//        提示文字t6.setPromptText("请输入11位号码");//监听文本输入的内容t2.textProperty().addListener(new ChangeListener<String>() {@Overridepublic void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {if(newValue.length()<2&&(newValue.equals("男")||newValue.equals("女"))){t2.setText(newValue);}else{t2.setText("");}}});b1.setOnAction(actionEvent -> {if (number == 0) {   //如果不存在提示框try {if (t1.getText().trim().equals("") || t2.getText().trim().equals("") || t3.getText().trim().equals("") || t4.getText().trim().equals("") || t5.getText().trim().equals("") || t6.getText().trim().equals("") || t7.getText().trim().equals("")||!t7.getText().equals(t8.getText())||t6.getText().length()!=11) {tips("添加失败");} else {if (Connect.add(t1.getText(), t2.getText(), t3.getText(), t4.getText(), t5.getText(), t6.getText(), t7.getText())) {tips("添加成功");ArrayList<Student> students = new ArrayList<>();init(bp, students);}}} catch (Exception e) {e.printStackTrace();}}});//        添加到面板中gp.add(l1, 0, 0);gp.add(t1, 1, 0);gp.add(l2, 0, 1);gp.add(t2, 1, 1);gp.add(l3, 0, 2);gp.add(t3, 1, 2);gp.add(l4, 0, 3);gp.add(t4, 1, 3);gp.add(l5, 0, 4);gp.add(t5, 1, 4);gp.add(l6, 0, 5);gp.add(t6, 1, 5);gp.add(l7, 0, 6);gp.add(t7, 1, 6);gp.add(l8,0,7);gp.add(t8,1,7);gp.add(b1, 1, 8);//        添加场景舞台Scene sc = new Scene(gp, 300, 300);Stage stage1 = new Stage();stage1.setResizable(false);
//        窗口关闭时减一stage1.setOnCloseRequest(windowEvent -> {anum--;});stage1.setScene(sc);stage1.setTitle("添加");stage1.show();}

提示框界面

当登录失败或者注册失败等操作时，会弹出提示框提示“登陆失败”或“注册失败”等提示框

  • 提示框同时只能存在一个
  • 提示框内容可以更改
    private static int number=0;//    提示框static void tips(String str) {
//        窗口数+1number++;
//        添加文本Label l1 = new Label(str);Button b1 = new Button("返回");
//        创建面板VBox vb = new VBox(l1, b1);Scene sc = new Scene(vb, 100, 100);vb.setSpacing(10);vb.setAlignment(Pos.CENTER);Stage stage1 = new Stage();stage1.setScene(sc);
//        设置窗口大小不可调节stage1.setResizable(false);stage1.setOnCloseRequest(windowEvent -> {number--;});b1.setOnAction(actionEvent -> {number--;stage1.close();});stage1.setTitle("提示");stage1.show();}

学生操作界面

在登陆成功时，存储学生id。由于id为主键唯一，通过id查询，以达到不同学生登陆后只能查看自己信息的效果

    private static int id=0;  //    学生操作界面static void homepage() {
//        创建文本Label l5 = new Label("学生查询系统");Button l1 = new Button("个人信息");Button l3 = new Button("成绩查询");Button l4 = new Button("返回登录");
//        设置字体颜色l1.setTextFill(Color.BLUE);l3.setTextFill(Color.BLUE);l4.setTextFill(Color.BLUE);
//        设置字体大小Font fon1 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 30);Font fon2 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 20);l5.setFont(fon1);l1.setFont(fon2);l3.setFont(fon2);l4.setFont(fon2);//        个人信息查询l1.setOnAction(actionEvent -> {query();});
//        个人成绩查询l3.setOnAction(actionEvent -> {try {score(id);} catch (Exception e) {e.printStackTrace();}});
//        返回登陆l4.setOnAction(actionEvent -> {login();});//        添加面板VBox bv = new VBox(50, l5, l1, l3, l4);bv.setAlignment(Pos.CENTER);bv.setBackground(bGround);Scene sc = new Scene(bv, 500, 600);stage.setScene(sc);}

个人信息查询界面

  • 创建BorderPane面板，将“首页”加入表单上侧
  • 点击“首页”按钮返回学生操作界面
    //    学生个人信息查询界面static void query() {BorderPane bp = new BorderPane();
//        顶部FlowPane fp1 = new FlowPane();Button b3 = new Button("首页");b3.setOnAction(actionEvent -> {homepage();});fp1.getChildren().addAll(b3);fp1.setHgap(10);
//        设置上下之间的间隙内间距fp1.setPadding(new Insets(10));bp.setTop(fp1);//        中部————表格控件ArrayList<Student> students = new ArrayList<>();init(bp, students, id);
//        添加场景Scene sc = new Scene(bp);stage.setScene(sc);}

个人成绩查询界面

懒得设置间距，就用空格手动设置文本与文本框的间距了

    //    学生查看成绩界面static void score(int id) throws Exception {Student student = new Student();Connect.score(student, id);Label t1 = new Label("  语文:  " + student.getLanguage());Label t2 = new Label("  数学:  " + student.getMath());Label t3 = new Label("  英语:  " + student.getEnglish());Label t4 = new Label("  物理:  " + student.getPhysics());Label t5 = new Label("  化学:  " + student.getChemistry());Label t6 = new Label("  生物:  " + student.getBiology());Label t7 = new Label("  总分:  " + student.getScore());//        字体Font fon2 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 20);
//        设置字体t1.setFont(fon2);t2.setFont(fon2);t3.setFont(fon2);t4.setFont(fon2);t5.setFont(fon2);t6.setFont(fon2);t7.setFont(fon2);Button b1 = new Button("返回");b1.setOnAction(actionEvent -> {homepage();});VBox vb = new VBox(t1, t2, t3, t4, t5, t6, t7, b1);vb.setAlignment(Pos.CENTER);vb.setSpacing(10);vb.setBackground(bGround);Scene sc = new Scene(vb, 500, 600);stage.setScene(sc);}

退出登陆

我在这里直接重新调用了登录界面...

管理员操作界面

    //    管理员操作界面static void maghomepage() {
//        创建文本Label l5 = new Label("学生查询系统");Button l1 = new Button("学生信息管理");Button l2 = new Button("学生成绩管理");Button l3 = new Button("返回登陆");
//        设置字体颜色l1.setTextFill(Color.BLUE);l2.setTextFill(Color.BLUE);l3.setTextFill(Color.BLUE);//        设置字体大小Font fon1 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 30);Font fon2 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 20);l5.setFont(fon1);l1.setFont(fon2);l2.setFont(fon2);l3.setFont(fon2);//        学生信息管理l1.setOnAction(actionEvent -> {magquery();});//        学生成绩管理l2.setOnAction(actionEvent -> {magscore();});
//        返回登陆l3.setOnAction(actionEvent -> {login();});//        添加面板VBox bv = new VBox(50, l5, l1, l2, l3);bv.setAlignment(Pos.CENTER);bv.setBackground(bGround);Scene sc = new Scene(bv, 500, 600);stage.setScene(sc);}

名字模糊查询表单

    //    名字模糊查询表格static void init(BorderPane bp, ArrayList<Student> students, String name) {//        中部————表格控件TableView<Student> tv = new TableView<Student>();
//        创建列TableColumn c1 = new TableColumn("学号");TableColumn c2 = new TableColumn("姓名");TableColumn c3 = new TableColumn("性别");TableColumn c4 = new TableColumn("班级");TableColumn c5 = new TableColumn("地址");TableColumn c6 = new TableColumn("年龄");TableColumn c7 = new TableColumn("电话");TableColumn c8 = new TableColumn("密码");
//        表格列宽宽度设置c1.setMinWidth(100);c2.setMinWidth(100);c3.setMinWidth(100);c4.setMinWidth(100);c5.setMinWidth(100);c6.setMinWidth(100);c7.setMinWidth(100);c8.setMinWidth(100);//        确定数据导入的列c1.setCellValueFactory(new PropertyValueFactory<>("id"));c2.setCellValueFactory(new PropertyValueFactory<>("name"));c3.setCellValueFactory(new PropertyValueFactory<>("gender"));c4.setCellValueFactory(new PropertyValueFactory<>("clas"));c5.setCellValueFactory(new PropertyValueFactory<>("address"));c6.setCellValueFactory(new PropertyValueFactory<>("age"));c7.setCellValueFactory(new PropertyValueFactory<>("phone"));c8.setCellValueFactory(new PropertyValueFactory<>("password"));tv.getColumns().addAll(c1, c2, c3, c4, c5, c6, c7,c8);//        创建学生集合try {Connect.inquire(students, name);} catch (Exception e) {e.printStackTrace();}tv.getItems().addAll(students);bp.setCenter(tv);}

学生信息管理

    //    学生信息管理static void magquery() {BorderPane bp = new BorderPane();
//        顶部FlowPane fp1 = new FlowPane();Label l1 = new Label("姓名");
//        Label l2 =new Label("班级");TextField f1 = new TextField();
//        TextField f2 = new TextField();Button b1 = new Button("查询");
//        模糊查询b1.setOnAction(actionEvent -> {ArrayList<Student> students = new ArrayList<>();init(bp, students, f1.getText());});Button b2 = new Button("刷新");b2.setOnAction(actionEvent -> {ArrayList<Student> students = new ArrayList<>();init(bp, students);});fp1.getChildren().addAll(l1, f1, b1, b2);fp1.setHgap(10);
//        设置上下之间的间隙内间距fp1.setPadding(new Insets(10));bp.setTop(fp1);//        底部FlowPane fp2 = new FlowPane();Button b3 = new Button("增加");Button b4 = new Button("删除");Button b5 = new Button("修改");Button b6 = new Button("退出");
//        增加b3.setOnAction(actionEvent -> {if (anum == 0) {add(bp);}});
//        删除b4.setOnAction(actionEvent -> {if (anum == 0) {delete(bp);}});
//        修改b5.setOnAction(actionEvent -> {if (anum == 0) {alter(bp);}});b6.setOnAction((actionEvent -> {maghomepage();}));fp2.getChildren().addAll(b3, b4, b5, b6);fp2.setHgap(10);fp2.setPadding(new Insets(10));bp.setBottom(fp2);//        中部————表格控件ArrayList<Student> students = new ArrayList<>();init(bp, students);
//        添加场景Scene sc = new Scene(bp);stage.setScene(sc);}

学生成绩管理

在表单上方加入了两个搜索框。一个为班级，一个为姓名。两个都可以单独，或者共同进行模糊查询。因为每种查询方式所用到的sql'语句不同，于是我在点击查询后对文本框的数据首先进行了一些简单的判断。

    //    学生成绩管理界面static void magscore() {BorderPane bp = new BorderPane();
//        顶部FlowPane fp1 = new FlowPane();Label l1 = new Label("姓名");Label l3 = new Label("班级");TextField f1 = new TextField();TextField f3 = new TextField();Button b1 = new Button("查询");Button b3 = new Button("刷新");//        模糊查询b1.setOnAction(actionEvent -> {if (!f1.getText().trim().equals("") && f3.getText().trim().equals("")) {   //姓名ArrayList<Student> students = new ArrayList<>();maginit(bp, students, f1.getText(), 1);} else if (f1.getText().trim().equals("") && !f3.getText().trim().equals("")) {  //班级ArrayList<Student> students = new ArrayList<>();maginit(bp, students, f3.getText(), 2);} else if (!f1.getText().trim().equals("") && !f3.getText().trim().equals("")) {  //姓名+班级ArrayList<Student> students = new ArrayList<>();maginit1(bp, students, f1.getText(), f3.getText());}});b3.setOnAction(actionEvent -> {ArrayList<Student> students = new ArrayList<>();maginit(bp, students);});fp1.getChildren().addAll(l1, f1, l3, f3, b1, b3);fp1.setHgap(10);
//        设置上下之间的间隙内间距fp1.setPadding(new Insets(10));bp.setTop(fp1);//        底部FlowPane fp2 = new FlowPane();Button b5 = new Button("修改");Button b6 = new Button("退出");//        修改b5.setOnAction(actionEvent -> {if (anum == 0) {magalter(bp);}});b6.setOnAction((actionEvent -> {maghomepage();}));fp2.getChildren().addAll(b5, b6);fp2.setHgap(10);fp2.setPadding(new Insets(10));bp.setBottom(fp2);//        中部————表格控件ArrayList<Student> students = new ArrayList<>();maginit(bp, students);
//        添加场景Scene sc = new Scene(bp);stage.setScene(sc);}

2.Connect类

简单封装

JDBC在使用过程中，有一部分代码是固定不变的，将这部分代码封装。

/*** URL地址*/private static final String URL = "jdbc:mysql://127.0.0.1:3306/ycx?useSSL=false";/*** 登录数据库服务器的账号*/private static final String USER = "root";/*** 登录数据库服务器的密码*/private static final String PASSWORD = "15194538986a";/*** 返回数据库连接对象** @return*/public static Connection getConn() {try {return DriverManager.getConnection(URL, USER, PASSWORD);} catch (SQLException e) {e.printStackTrace();}return null;}/*** 关闭资源** @param rs* @param stat* @param conn*/public static void close(ResultSet rs, Statement stat, Connection conn) {try {if (rs != null) {rs.close();}if (stat != null) {stat.close();}if (conn != null) {conn.close();}} catch (SQLException e) {e.printStackTrace();}}/*** 封装通用的更新操作（即通过该方法实现对弈任意数据表的insert，update，delete操作）** @param sql    需要执行的SQL语句* @param params 执行SQL语句时需要传递进去参数* @return 执行结果*/public static boolean exeUpdate(String sql, Object... params) {//获取连接对象Connection conn = getConn();PreparedStatement ps = null;try {//获取预编译对象ps = conn.prepareStatement(sql);//执行参数赋值操作if (Objects.nonNull(params)) {//循环将所有的参数赋值for (int i = 0; i < params.length; i++) {ps.setObject(i + 1, params[i]);}}//执行更新return ps.executeUpdate() > 0;} catch (SQLException e) {e.printStackTrace();} finally {//关闭资源close(null, ps, conn);}return false;}

增、删、改

    //    增加public static boolean add(String name, String gender, String clas, String address,String age, String phone, String password) throws Exception {String sql = "insert into student(name,gender,clas,address,age,phone,password) values (?,?,?,?,?,?,?)";return exeUpdate(sql, name, gender, clas, address, age, phone, password);}//    修改public static boolean update(String name, String gender, String clas, String address,String age, String phone, String password, int id) throws Exception {String sql = "update student set name=?,gender=?,clas=?,address=?,age=?,phone=?,password=? where id=?";return exeUpdate(sql, name, gender, clas, address, age, phone, password, id);}//    删除public static boolean delete(int id) {String sql = "delete from student where id=?";return exeUpdate(sql, id);}//    学生成绩修改public static boolean magupdate(int id, int language, int math, int english, int physics, int chemistry,int biology) throws Exception {String sql1 = "update score set language=?,math=?,english=? where student_id=?";String sql2 = "update elective set physics=?,chemistry=?,biology=? where student_id=?";return exeUpdate(sql1, language, math, english, id) && exeUpdate(sql2, physics, chemistry, biology, id);}

登录功能

实现登录功能需要与数据库进行连接。判断输入的账号与密码在数据库中多条件查询是否存在结果。

   //    学生登录public static int login(int id, String pwd) throws Exception {String sql = "select * from student where id=? and password=?";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setInt(1, id);pstmt.setString(2, pwd);ResultSet rs = pstmt.executeQuery();if (rs.next()) {return rs.getInt("id");} else {return 0;}}//    管理员登录public static boolean maglogin(String name, String pwd) throws Exception {String sql = "select * from admin_login_k where admin_id=? and admin_pass=?";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setString(1, name);pstmt.setString(2, pwd);ResultSet rs = pstmt.executeQuery();if (rs.next()) {return true;} else {return false;}}

学号查询与成绩查询

由于刚开始写的管理系统学生登陆系统通过名字与密码登录，所以需要获取学号。后面我换成了学号和密码登录，学号查询已经没有存在的意义了。但是我懒得改了...

    //        学号查询public static void inquire(ArrayList<Student> list, int id) throws Exception {String sql = "select * from student where id=?";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setInt(1, id);ResultSet rs = pstmt.executeQuery();if (rs.next()) {Student student = new Student();student.setId(rs.getInt("id"));student.setName(rs.getString("name"));student.setGender(rs.getString("gender"));student.setClas(rs.getString("clas"));student.setAddress(rs.getString("address"));student.setAge(rs.getString("age"));student.setPhone(rs.getString("phone"));list.add(student);}//        释放资源rs.close();pstmt.close();}//    成绩查询--学生public static void score(Student student, int id) throws Exception {String sql = "select id,name,clas,language,math,english,physics,chemistry,biology,language+math+english+physics+chemistry+biology 'score' from student,score,elective where id=score.student_id and id=elective.student_id and id=?;";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setInt(1, id);ResultSet rs = pstmt.executeQuery();if (rs.next()) {student.setLanguage(rs.getInt("language"));student.setMath(rs.getInt("math"));student.setEnglish(rs.getInt("english"));student.setLanguage(rs.getInt("language"));student.setMath(rs.getInt("math"));student.setEnglish(rs.getInt("english"));student.setPhysics(rs.getInt("physics"));student.setChemistry(rs.getInt("chemistry"));student.setBiology(rs.getInt("biology"));student.setScore(rs.getInt("score"));}//        释放资源rs.close();pstmt.close();}

表单中学生类初始化

    //   学生类初始化public static void student(ArrayList<Student> list) throws Exception {String sql = "select * from student ";PreparedStatement pstmt = getConn().prepareStatement(sql);ResultSet rs = pstmt.executeQuery();while (rs.next()) {//            获取数据int id = rs.getInt("id");String name = rs.getString("name");String gender = rs.getString("gender");String clas = rs.getString("clas");String address = rs.getString("address");String age = rs.getString("age");String phone = rs.getString("phone");String password=rs.getString("password");//            封装数据Student student = new Student();student.setId(id);student.setName(name);student.setGender(gender);student.setClas(clas);student.setAddress(address);student.setAge(age);student.setPhone(phone);student.setPassword(password);list.add(student);}
//        释放资源rs.close();pstmt.close();}//   学生类成绩初始化--管理员public static void magstudent(ArrayList<Student> list) throws Exception {String sql = "select id,name,clas,language,math,english,physics,chemistry,biology,language+math+english+physics+chemistry+biology 'score' from student,score,elective where id=score.student_id and id=elective.student_id; ";PreparedStatement pstmt = getConn().prepareStatement(sql);ResultSet rs = pstmt.executeQuery();while (rs.next()) {//            获取数据int id = rs.getInt("id");String name = rs.getString("name");String clas = rs.getString("clas");int language = rs.getInt("language");int math = rs.getInt("math");int english = rs.getInt("english");int physics = rs.getInt("physics");int chemistry = rs.getInt("chemistry");int biology = rs.getInt("biology");int score = rs.getInt("score");//            封装数据Student student = new Student();student.setId(id);student.setName(name);student.setClas(clas);student.setLanguage(language);student.setMath(math);student.setEnglish(english);student.setPhysics(physics);student.setChemistry(chemistry);student.setBiology(biology);student.setScore(score);list.add(student);}
//        释放资源rs.close();pstmt.close();}

模糊查询

表单中需要传入学生类的集合，在不同操作下传入的学生类的集合不同。将符合模糊查询条件的学生对象传入加载入学生集合中，并上传至学生类。

    //        模糊查询public static void inquire(ArrayList<Student> list, String name) throws Exception {String sql = "select * from student where name like ?";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setString(1, "%" + name + "%");ResultSet rs = pstmt.executeQuery();while(rs.next()) {Student student = new Student();student.setId(rs.getInt("id"));student.setName(rs.getString("name"));student.setGender(rs.getString("gender"));student.setClas(rs.getString("clas"));student.setAddress(rs.getString("address"));student.setAge(rs.getString("age"));student.setPhone(rs.getString("phone"));student.setPassword(rs.getString("password"));list.add(student);}//        释放资源rs.close();pstmt.close();}//        模糊查询--学生成绩public static void maginquire(ArrayList<Student> list, String s, int a) throws Exception {String sql = "";if (a == 1) {   //名字模糊查询sql = "select id,name,clas,language,math,english,physics,chemistry,biology,language+math+english+physics+chemistry+biology 'score' from student,score,elective where id=score.student_id and id=elective.student_id and name like?;";} else if (a == 2) {  //班级模糊查询sql = "select id,name,clas,language,math,english,physics,chemistry,biology,language+math+english+physics+chemistry+biology 'score' from student,score,elective where id=score.student_id and id=elective.student_id and clas like?;";}PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setString(1, "%" + s + "%");ResultSet rs = pstmt.executeQuery();while(rs.next()){Student student = new Student();student.setId(rs.getInt("id"));student.setName(rs.getString("name"));student.setClas(rs.getString("clas"));student.setLanguage(rs.getInt("language"));student.setMath(rs.getInt("math"));student.setEnglish(rs.getInt("english"));student.setPhysics(rs.getInt("physics"));student.setChemistry(rs.getInt("chemistry"));student.setBiology(rs.getInt("biology"));student.setScore(rs.getInt("score"));list.add(student);}//        释放资源rs.close();pstmt.close();}//        模糊查询--学生成绩public static void maginquire(ArrayList<Student> list, String name, String clas) throws Exception {//名字+班级String sql = "select id,name,clas,language,math,english,physics,chemistry,biology,language+math+english+physics+chemistry+biology 'score' from student,score,elective where id=score.student_id and id=elective.student_id and  name like? and  clas like?;";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setString(1, "%" + name + "%");pstmt.setString(2, "%" + clas + "%");ResultSet rs = pstmt.executeQuery();while (rs.next()) {Student student = new Student();student.setId(rs.getInt("id"));student.setName(rs.getString("name"));student.setClas(rs.getString("clas"));student.setLanguage(rs.getInt("language"));student.setMath(rs.getInt("math"));student.setEnglish(rs.getInt("english"));student.setPhysics(rs.getInt("physics"));student.setChemistry(rs.getInt("chemistry"));student.setBiology(rs.getInt("biology"));student.setScore(rs.getInt("score"));list.add(student);}//        释放资源rs.close();pstmt.close();}

3.学生类

public class Student {private int id;private String name;private String gender;private String clas;private String address;private String age;private String phone;private String password;private int language;private int math;private int english;private int physics;private int chemistry;private int biology;private int score;public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public int getScore() {return score;}public void setScore(int score) {this.score = score;}public int getLanguage() {return language;}public void setLanguage(int language) {this.language = language;}public int getMath() {return math;}public void setMath(int math) {this.math = math;}public int getEnglish() {return english;}public void setEnglish(int english) {this.english = english;}public int getPhysics() {return physics;}public void setPhysics(int physics) {this.physics = physics;}public int getChemistry() {return chemistry;}public void setChemistry(int chemistry) {this.chemistry = chemistry;}public int getBiology() {return biology;}public void setBiology(int biology) {this.biology = biology;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}public String getClas() {return clas;}public void setClas(String clas) {this.clas = clas;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}public String getPhone() {return phone;}public void setPhone(String phone) {this.phone = phone;}}

三.总代码

1.View类


import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.image.Image;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.FontPosture;
import javafx.scene.text.FontWeight;
import javafx.stage.Stage;
import javafx.util.Callback;import java.util.ArrayList;public class View extends Application {//    登录学生学号private static int id;private static Stage stage;//    提示框数目private static int number = 0;//    增删改查的页面数private static int anum = 0;private static Student student0;private static Image img=new Image("D:\\JAVA\\id\\JavaFX\\image\\bg1.jpg" +"");private static BackgroundImage bImg = new BackgroundImage(img,BackgroundRepeat.NO_REPEAT,BackgroundRepeat.NO_REPEAT,BackgroundPosition.DEFAULT,BackgroundSize.DEFAULT);private static Background bGround = new Background(bImg);@Overridepublic void start(Stage stage) throws Exception {
//        将舞台复制给静态属性View.stage = stage;stage.setTitle("学生信息管理系统");//        设置窗口大小不可调节stage.setResizable(false);
//        登录login();stage.show();}//     登录界面static void login() {//        新建布局GridPane gp = new GridPane();
//        设置居中方式gp.setAlignment(Pos.CENTER);
//        调整空隙gp.setHgap(10);gp.setVgap(10);
//        新建文本标签Label l1 = new Label("姓名");TextField name = new TextField();//        用户密码Label l2 = new Label("密码");//        字体Font fon1 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 20);l1.setFont(fon1);l2.setFont(fon1);
//        新建密码框PasswordField pwd = new PasswordField();//        按钮的创建Button b1 = new Button("登录");Button b2 = new Button("注册");//        单选框：学生，老师ToggleGroup group = new ToggleGroup();RadioButton student = new RadioButton("学生");RadioButton manager = new RadioButton("管理员");HBox h1 = new HBox();student.setToggleGroup(group);manager.setToggleGroup(group);//        添加单选按钮监听group.selectedToggleProperty().addListener((observable, oldValue, newValue) -> {if (newValue.equals(student)) {   //单选按钮为学生b1.setOnAction(actionEvent -> {try {if (Connect.login(name.getText(), pwd.getText()) > 0) {id = Connect.login(name.getText(), pwd.getText());homepage();} else {if (number == 0) {tips("登陆失败");}}} catch (Exception e) {e.printStackTrace();}});//        注册按钮事件b2.setOnAction(actionEvent -> {BorderPane bp = new BorderPane();add(bp);});
//                设置”注册“按钮可见b2.setVisible(true);} else if (newValue.equals(manager)) {
//                设置”注册“按钮不可见b2.setVisible(false);b1.setOnAction(actionEvent -> {try {if (Connect.maglogin(name.getText(), pwd.getText())) {maghomepage();} else {if (number == 0) {tips("登录失败");}};} catch (Exception e) {e.printStackTrace();}});}});h1.getChildren().addAll(student, manager);//        背景图片gp.setBackground(bGround);//        添加画板gp.add(l1, 0, 0);gp.add(name, 1, 0);gp.add(l2, 0, 1);gp.add(pwd, 1, 1);gp.add(b1, 0, 2);gp.add(b2, 1, 2);gp.add(h1, 1, 3);Scene sc = new Scene(gp, 500, 600);stage.setScene(sc);}//    注册页面static void regist() {//        新建文本标签Label l1 = new Label("姓名");TextField name = new TextField();
//        用户密码Label l2 = new Label("密码");
//        新建密码框PasswordField pwd = new PasswordField();//        按钮的创建Button b2 = new Button("注册");Button b3 = new Button("取消");//            创建注册画板GridPane gp2 = new GridPane();//            设置居中方式gp2.setAlignment(Pos.CENTER);
//            调整空隙gp2.setHgap(10);gp2.setVgap(10);//            姓名gp2.add(l1, 0, 0);gp2.add(name, 1, 0);//            密码gp2.add(l2, 0, 1);gp2.add(pwd, 1, 1);//            按钮gp2.add(b2, 0, 3);gp2.add(b3, 1, 3);Scene sc2 = new Scene(gp2, 500, 600);stage.setScene(sc2);//        点击注册b2.setOnAction(actionEvent -> {try {
//                Connect.enroll(name.getText(), pwd.getText());tips("注册成功");} catch (Exception e) {e.printStackTrace();}});//        点击取消，返回登录界面b3.setOnAction(actionEvent -> {login();});}//    学生操作界面static void homepage() {
//        创建文本Label l5 = new Label("学生查询系统");Button l1 = new Button("个人信息");Button l3 = new Button("成绩查询");Button l4 = new Button("返回登录");
//        设置字体颜色l1.setTextFill(Color.BLUE);l3.setTextFill(Color.BLUE);l4.setTextFill(Color.BLUE);
//        设置字体大小Font fon1 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 30);Font fon2 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 20);l5.setFont(fon1);l1.setFont(fon2);l3.setFont(fon2);l4.setFont(fon2);//        学生信息查询l1.setOnAction(actionEvent -> {query();});
//        成绩查询l3.setOnAction(actionEvent -> {try {score(id);} catch (Exception e) {e.printStackTrace();}});
//        返回登陆l4.setOnAction(actionEvent -> {login();});//        添加面板VBox bv = new VBox(50, l5, l1, l3, l4);bv.setAlignment(Pos.CENTER);bv.setBackground(bGround);Scene sc = new Scene(bv, 500, 600);stage.setScene(sc);}//    管理员操作界面static void maghomepage() {
//        创建文本Label l5 = new Label("学生查询系统");Button l1 = new Button("学生信息管理");Button l2 = new Button("学生成绩管理");Button l3 = new Button("返回登陆");
//        设置字体颜色l1.setTextFill(Color.BLUE);l2.setTextFill(Color.BLUE);l3.setTextFill(Color.BLUE);//        设置字体大小Font fon1 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 30);Font fon2 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 20);l5.setFont(fon1);l1.setFont(fon2);l2.setFont(fon2);l3.setFont(fon2);//        学生信息管理l1.setOnAction(actionEvent -> {magquery();});//        学生成绩管理l2.setOnAction(actionEvent -> {magscore();});
//        返回登陆l3.setOnAction(actionEvent -> {login();});//        添加面板VBox bv = new VBox(50, l5, l1, l2, l3);bv.setAlignment(Pos.CENTER);bv.setBackground(bGround);Scene sc = new Scene(bv, 500, 600);stage.setScene(sc);}//    学生信息查询界面static void query() {BorderPane bp = new BorderPane();
//        顶部FlowPane fp1 = new FlowPane();Button b3 = new Button("首页");b3.setOnAction(actionEvent -> {homepage();});fp1.getChildren().addAll(b3);fp1.setHgap(10);
//        设置上下之间的间隙内间距fp1.setPadding(new Insets(10));bp.setTop(fp1);//        中部————表格控件ArrayList<Student> students = new ArrayList<>();init(bp, students, id);
//        添加场景Scene sc = new Scene(bp);stage.setScene(sc);}//    学生信息管理static void magquery() {BorderPane bp = new BorderPane();
//        顶部FlowPane fp1 = new FlowPane();Label l1 = new Label("姓名");
//        Label l2 =new Label("班级");TextField f1 = new TextField();
//        TextField f2 = new TextField();Button b1 = new Button("查询");
//        模糊查询b1.setOnAction(actionEvent -> {ArrayList<Student> students = new ArrayList<>();init(bp, students, f1.getText());});Button b2 = new Button("刷新");b2.setOnAction(actionEvent -> {ArrayList<Student> students = new ArrayList<>();init(bp, students);});fp1.getChildren().addAll(l1, f1, b1, b2);fp1.setHgap(10);
//        设置上下之间的间隙内间距fp1.setPadding(new Insets(10));bp.setTop(fp1);//        底部FlowPane fp2 = new FlowPane();Button b3 = new Button("增加");Button b4 = new Button("删除");Button b5 = new Button("修改");Button b6 = new Button("退出");
//        增加b3.setOnAction(actionEvent -> {if (anum == 0) {add(bp);}});
//        删除b4.setOnAction(actionEvent -> {if (anum == 0) {delete(bp);}});
//        修改b5.setOnAction(actionEvent -> {if (anum == 0) {alter(bp);}});b6.setOnAction((actionEvent -> {maghomepage();}));fp2.getChildren().addAll(b3, b4, b5, b6);fp2.setHgap(10);fp2.setPadding(new Insets(10));bp.setBottom(fp2);//        中部————表格控件ArrayList<Student> students = new ArrayList<>();init(bp, students);
//        添加场景Scene sc = new Scene(bp);stage.setScene(sc);}//    学生查看成绩界面static void score(int id) throws Exception {Student student = new Student();Connect.score(student, id);Label t1 = new Label("  语文:  " + student.getLanguage());Label t2 = new Label("  数学:  " + student.getMath());Label t3 = new Label("  英语:  " + student.getEnglish());Label t4 = new Label("  物理:  " + student.getPhysics());Label t5 = new Label("  化学:  " + student.getChemistry());Label t6 = new Label("  生物:  " + student.getBiology());Label t7 = new Label("  总分:  " + student.getScore());//        字体Font fon2 = Font.font("Times New Roman", FontWeight.BOLD, FontPosture.REGULAR, 20);
//        设置字体t1.setFont(fon2);t2.setFont(fon2);t3.setFont(fon2);t4.setFont(fon2);t5.setFont(fon2);t6.setFont(fon2);t7.setFont(fon2);Button b1 = new Button("返回");b1.setOnAction(actionEvent -> {homepage();});VBox vb = new VBox(t1, t2, t3, t4, t5, t6, t7, b1);vb.setAlignment(Pos.CENTER);vb.setSpacing(10);vb.setBackground(bGround);Scene sc = new Scene(vb, 500, 600);stage.setScene(sc);}//    增加界面static void add(BorderPane bp) {anum++;GridPane gp = new GridPane();
//        设置间距gp.setVgap(10);gp.setHgap(10);gp.setAlignment(Pos.CENTER);
//        文本Label l1 = new Label("姓名");Label l2 = new Label("性别");Label l3 = new Label("班级");Label l4 = new Label("地址");Label l5 = new Label("年龄");Label l6 = new Label("电话");Label l7 = new Label("密码");Label l8=new Label("确认密码");Button b1 = new Button("提交");//        文本框TextField t1 = new TextField();TextField t2 = new TextField();TextField t3 = new TextField();TextField t4 = new TextField();TextField t5 = new TextField();TextField t6 = new TextField();PasswordField t7 = new PasswordField();PasswordField t8=new PasswordField();//        提示文字t6.setPromptText("请输入11位号码");//监听文本输入的内容t2.textProperty().addListener(new ChangeListener<String>() {@Overridepublic void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {if(newValue.length()<2&&(newValue.equals("男")||newValue.equals("女"))){t2.setText(newValue);}else{t2.setText("");}}});b1.setOnAction(actionEvent -> {if (number == 0) {   //如果不存在提示框try {if (t1.getText().trim().equals("") || t2.getText().trim().equals("") || t3.getText().trim().equals("") || t4.getText().trim().equals("") || t5.getText().trim().equals("") || t6.getText().trim().equals("") || t7.getText().trim().equals("")||!t7.getText().equals(t8.getText())||t6.getText().length()!=11) {tips("添加失败");} else {if (Connect.add(t1.getText(), t2.getText(), t3.getText(), t4.getText(), t5.getText(), t6.getText(), t7.getText())) {tips("添加成功");ArrayList<Student> students = new ArrayList<>();init(bp, students);}}} catch (Exception e) {e.printStackTrace();}}});//        添加到面板中gp.add(l1, 0, 0);gp.add(t1, 1, 0);gp.add(l2, 0, 1);gp.add(t2, 1, 1);gp.add(l3, 0, 2);gp.add(t3, 1, 2);gp.add(l4, 0, 3);gp.add(t4, 1, 3);gp.add(l5, 0, 4);gp.add(t5, 1, 4);gp.add(l6, 0, 5);gp.add(t6, 1, 5);gp.add(l7, 0, 6);gp.add(t7, 1, 6);gp.add(l8,0,7);gp.add(t8,1,7);gp.add(b1, 1, 8);//        添加场景舞台Scene sc = new Scene(gp, 300, 300);Stage stage1 = new Stage();stage1.setResizable(false);
//        窗口关闭时减一stage1.setOnCloseRequest(windowEvent -> {anum--;});stage1.setScene(sc);stage1.setTitle("添加");stage1.show();}//    修改--管理员成绩修改public static void magalter(BorderPane bp) {anum++;GridPane gp = new GridPane();
//        设置间距gp.setVgap(10);gp.setHgap(10);gp.setAlignment(Pos.CENTER);
//        文本Label l0 = new Label("学号");Label l1 = new Label("语文");Label l2 = new Label("数学");Label l3 = new Label("英语");Label l4 = new Label("物理");Label l5 = new Label("化学");Label l6 = new Label("生物");Button b1 = new Button("提交");
//        文本框TextField t0 = new TextField();TextField t1 = new TextField();TextField t2 = new TextField();TextField t3 = new TextField();TextField t4 = new TextField();TextField t5 = new TextField();TextField t6 = new TextField();if(!student0.equals("")){t0.setText(Integer.toString(student0.getId()));t1.setText(Integer.toString(student0.getLanguage()));t2.setText(Integer.toString(student0.getMath()));t3.setText(Integer.toString(student0.getEnglish()));t4.setText(Integer.toString(student0.getPhysics()));t5.setText(Integer.toString(student0.getChemistry()));t6.setText(Integer.toString(student0.getBiology()));}b1.setOnAction(actionEvent -> {if (number == 0) {try {if (t0.getText().trim().equals("") || t1.getText().trim().equals("") || t2.getText().trim().equals("") || t3.getText().trim().equals("") || t4.getText().trim().equals("") || t5.getText().trim().equals("") || t6.getText().trim().equals("")) {tips("修改失败");} else {if (Connect.magupdate(Integer.valueOf(t0.getText()), Integer.valueOf(t1.getText()), Integer.valueOf(t2.getText()), Integer.valueOf(t3.getText()), Integer.valueOf(t4.getText()), Integer.valueOf(t5.getText()), Integer.valueOf(t6.getText()))) {tips("修改成功");ArrayList<Student> students = new ArrayList<>();maginit(bp, students);} else {tips("修改失败");}}} catch (Exception e) {e.printStackTrace();}}});//        添加到面板中gp.add(l0, 0, 0);gp.add(t0, 1, 0);gp.add(l1, 0, 1);gp.add(t1, 1, 1);gp.add(l2, 0, 2);gp.add(t2, 1, 2);gp.add(l3, 0, 3);gp.add(t3, 1, 3);gp.add(l4, 0, 4);gp.add(t4, 1, 4);gp.add(l5, 0, 5);gp.add(t5, 1, 5);gp.add(l6, 0, 6);gp.add(t6, 1, 6);gp.add(b1, 1, 7);//        添加场景舞台Scene sc = new Scene(gp, 300, 300);Stage stage1 = new Stage();
//        窗口关闭时减一stage1.setOnCloseRequest(windowEvent -> {anum--;});stage1.setScene(sc);stage1.setTitle("修改");stage1.show();}//    修改界面static void alter(BorderPane bp) {anum++;GridPane gp = new GridPane();
//        设置间距gp.setVgap(10);gp.setHgap(10);gp.setAlignment(Pos.CENTER);
//        文本Label l0 = new Label("学号");Label l1 = new Label("姓名");Label l2 = new Label("性别");Label l3 = new Label("班级");Label l4 = new Label("地址");Label l5 = new Label("年龄");Label l6 = new Label("电话");Label l7 = new Label("密码");Button b1 = new Button("提交");
//        文本框TextField t0 = new TextField();TextField t1 = new TextField();TextField t2 = new TextField();TextField t3 = new TextField();TextField t4 = new TextField();TextField t5 = new TextField();TextField t6 = new TextField();TextField t7 =new TextField();//监听文本输入的内容t2.textProperty().addListener(new ChangeListener<String>() {@Overridepublic void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {if(newValue.length()<2&&(newValue.equals("男")||newValue.equals("女"))){t2.setText(newValue);}else{t2.setText("");}}});if(!student0.equals("")){t0.setText(Integer.toString(student0.getId()));t1.setText(student0.getName());t2.setText(student0.getGender());t3.setText(student0.getClas());t4.setText(student0.getAddress());t5.setText(student0.getAge());t6.setText(student0.getPhone());t7.setText(student0.getPassword());}b1.setOnAction(actionEvent -> {if (number == 0) {try {if (t0.getText().trim().equals("") || t1.getText().trim().equals("") || t2.getText().trim().equals("") || t3.getText().trim().equals("") || t4.getText().trim().equals("") || t5.getText().trim().equals("") || t6.getText().trim().equals("") || t7.getText().trim().equals("")||t6.getText().length()!=11) {tips("修改失败");} else {if (Connect.update(t1.getText(), t2.getText(), t3.getText(), t4.getText(), t5.getText(), t6.getText(), t7.getText(), Integer.valueOf(t0.getText()))) {tips("修改成功");ArrayList<Student> students = new ArrayList<>();init(bp, students);};}} catch (Exception e) {e.printStackTrace();}}});//        添加到面板中gp.add(l0, 0, 0);gp.add(t0, 1, 0);gp.add(l1, 0, 1);gp.add(t1, 1, 1);gp.add(l2, 0, 2);gp.add(t2, 1, 2);gp.add(l3, 0, 3);gp.add(t3, 1, 3);gp.add(l4, 0, 4);gp.add(t4, 1, 4);gp.add(l5, 0, 5);gp.add(t5, 1, 5);gp.add(l6, 0, 6);gp.add(t6, 1, 6);gp.add(l7, 0, 7);gp.add(t7, 1, 7);gp.add(b1, 1, 8);//        添加场景舞台Scene sc = new Scene(gp, 300, 300);Stage stage1 = new Stage();
//        窗口关闭时减一stage1.setOnCloseRequest(windowEvent -> {anum--;});stage1.setScene(sc);stage1.setTitle("修改");stage1.show();}//    删除界面static void delete(BorderPane bp) {anum++;GridPane gp = new GridPane();
//        设置间距gp.setVgap(10);gp.setHgap(10);gp.setAlignment(Pos.CENTER);
//        文本Label l0 = new Label("学号");Button b1 = new Button("提交");
//        文本框TextField t0 = new TextField();b1.setOnAction(actionEvent -> {if (number == 0) {try {if (t0.getText().trim().equals("")) {tips("删除失败");} else {if (Connect.delete(Integer.valueOf(t0.getText()))) {tips("删除成功");ArrayList<Student> students = new ArrayList<>();init(bp, students);};}} catch (Exception e) {e.printStackTrace();}}});//        添加到面板中gp.add(l0, 0, 0);gp.add(t0, 1, 0);gp.add(b1, 1, 1);//        添加场景舞台Scene sc = new Scene(gp, 300, 300);Stage stage1 = new Stage();
//        窗口关闭时减一stage1.setOnCloseRequest(windowEvent -> {anum--;});stage1.setScene(sc);stage1.setTitle("删除");stage1.show();}//    提示框static void tips(String str) {
//        窗口数+1number++;
//        添加文本Label l1 = new Label(str);Button b1 = new Button("返回");
//        创建面板VBox vb = new VBox(l1, b1);Scene sc = new Scene(vb, 100, 100);vb.setSpacing(10);vb.setAlignment(Pos.CENTER);Stage stage1 = new Stage();stage1.setScene(sc);
//        设置窗口大小不可调节stage1.setResizable(false);stage1.setOnCloseRequest(windowEvent -> {number--;});b1.setOnAction(actionEvent -> {number--;stage1.close();});stage1.setTitle("提示");stage1.show();}//    管理员表格初始化static void init(BorderPane bp, ArrayList<Student> students) {//        中部————表格控件TableView<Student> tv = new TableView<Student>();
//        创建列TableColumn c1 = new TableColumn("学号");TableColumn c2 = new TableColumn("姓名");TableColumn c3 = new TableColumn("性别");TableColumn c4 = new TableColumn("班级");TableColumn c5 = new TableColumn("地址");TableColumn c6 = new TableColumn("年龄");TableColumn c7 = new TableColumn("电话");TableColumn c8 =new TableColumn("密码");
//c1.setMinWidth(100);c2.setMinWidth(100);c3.setMinWidth(100);c4.setMinWidth(100);c5.setMinWidth(100);c6.setMinWidth(100);c7.setMinWidth(100);c8.setMinWidth(100);//        确定数据导入的列c1.setCellValueFactory(new PropertyValueFactory<>("id"));c2.setCellValueFactory(new PropertyValueFactory<>("name"));c3.setCellValueFactory(new PropertyValueFactory<>("gender"));c4.setCellValueFactory(new PropertyValueFactory<>("clas"));c5.setCellValueFactory(new PropertyValueFactory<>("address"));c6.setCellValueFactory(new PropertyValueFactory<>("age"));c7.setCellValueFactory(new PropertyValueFactory<>("phone"));c8.setCellValueFactory(new PropertyValueFactory<>("password"));//        鼠标点击后储存该行数据tv.setRowFactory( a -> {TableRow<Student> row = new TableRow<Student>();row.setOnMouseClicked(event -> {if (event.getClickCount() == 1 && (! row.isEmpty()) ) {student0 =row.getItem();}});return row ;});tv.getColumns().addAll(c1, c2, c3, c4, c5, c6, c7,c8);//        创建学生集合try {Connect.student(students);} catch (Exception e) {e.printStackTrace();}tv.getItems().addAll(students);bp.setCenter(tv);}//    学生成绩管理界面static void magscore() {BorderPane bp = new BorderPane();
//        顶部FlowPane fp1 = new FlowPane();Label l1 = new Label("姓名");Label l3 = new Label("班级");TextField f1 = new TextField();TextField f3 = new TextField();Button b1 = new Button("查询");Button b3 = new Button("刷新");//        模糊查询b1.setOnAction(actionEvent -> {if (!f1.getText().trim().equals("") && f3.getText().trim().equals("")) {   //姓名ArrayList<Student> students = new ArrayList<>();maginit(bp, students, f1.getText(), 1);} else if (f1.getText().trim().equals("") && !f3.getText().trim().equals("")) {  //班级ArrayList<Student> students = new ArrayList<>();maginit(bp, students, f3.getText(), 2);} else if (!f1.getText().trim().equals("") && !f3.getText().trim().equals("")) {  //姓名+班级ArrayList<Student> students = new ArrayList<>();maginit1(bp, students, f1.getText(), f3.getText());}});b3.setOnAction(actionEvent -> {ArrayList<Student> students = new ArrayList<>();maginit(bp, students);});fp1.getChildren().addAll(l1, f1, l3, f3, b1, b3);fp1.setHgap(10);
//        设置上下之间的间隙内间距fp1.setPadding(new Insets(10));bp.setTop(fp1);//        底部FlowPane fp2 = new FlowPane();Button b5 = new Button("修改");Button b6 = new Button("退出");//        修改b5.setOnAction(actionEvent -> {if (anum == 0) {magalter(bp);}});b6.setOnAction((actionEvent -> {maghomepage();}));fp2.getChildren().addAll(b5, b6);fp2.setHgap(10);fp2.setPadding(new Insets(10));bp.setBottom(fp2);//        中部————表格控件ArrayList<Student> students = new ArrayList<>();maginit(bp, students);
//        添加场景Scene sc = new Scene(bp);stage.setScene(sc);}//    学生成绩管理表单static void maginit(BorderPane bp, ArrayList<Student> students) {//        中部————表格控件TableView<Student> tv = new TableView<Student>();
//        创建列TableColumn c1 = new TableColumn("学号");TableColumn c2 = new TableColumn("姓名");TableColumn c3 = new TableColumn("班级");TableColumn c4 = new TableColumn("语文");TableColumn c5 = new TableColumn("数学");TableColumn c6 = new TableColumn("英语");TableColumn c7 = new TableColumn("物理");TableColumn c8 = new TableColumn("化学");TableColumn c9 = new TableColumn("生物");TableColumn c10 = new TableColumn("总分");//        表格列宽宽度设置c1.setMinWidth(100);c2.setMinWidth(100);c3.setMinWidth(100);c4.setMinWidth(100);c5.setMinWidth(100);c6.setMinWidth(100);c7.setMinWidth(100);c8.setMinWidth(100);c9.setMinWidth(100);c10.setMinWidth(100);//        确定数据导入的列c1.setCellValueFactory(new PropertyValueFactory<>("id"));c2.setCellValueFactory(new PropertyValueFactory<>("name"));c3.setCellValueFactory(new PropertyValueFactory<>("clas"));c4.setCellValueFactory(new PropertyValueFactory<>("language"));c5.setCellValueFactory(new PropertyValueFactory<>("math"));c6.setCellValueFactory(new PropertyValueFactory<>("english"));c7.setCellValueFactory(new PropertyValueFactory<>("physics"));c8.setCellValueFactory(new PropertyValueFactory<>("chemistry"));c9.setCellValueFactory(new PropertyValueFactory<>("biology"));c10.setCellValueFactory(new PropertyValueFactory<>("score"));//        鼠标点击后储存该行数据tv.setRowFactory( a -> {TableRow<Student> row = new TableRow<Student>();row.setOnMouseClicked(event -> {if (event.getClickCount() == 1 && (! row.isEmpty()) ) {student0 =row.getItem();}});return row ;});tv.getColumns().addAll(c1, c2, c3, c4, c5, c6, c7, c8, c9, c10);//        创建学生集合try {Connect.magstudent(students);} catch (Exception e) {e.printStackTrace();}tv.getItems().addAll(students);//        双击输出行bp.setCenter(tv);}//    名字或班级   模糊查询表格static void maginit(BorderPane bp, ArrayList<Student> students, String s, int a) {//        中部————表格控件TableView<Student> tv = new TableView<Student>();
//        创建列TableColumn c1 = new TableColumn("学号");TableColumn c2 = new TableColumn("姓名");TableColumn c3 = new TableColumn("班级");TableColumn c4 = new TableColumn("语文");TableColumn c5 = new TableColumn("数学");TableColumn c6 = new TableColumn("英语");TableColumn c7 = new TableColumn("物理");TableColumn c8 = new TableColumn("化学");TableColumn c9 = new TableColumn("生物");TableColumn c10 = new TableColumn("总分");
//        表格列宽宽度设置c1.setMinWidth(100);c2.setMinWidth(100);c3.setMinWidth(100);c4.setMinWidth(100);c5.setMinWidth(100);c6.setMinWidth(100);c7.setMinWidth(100);c8.setMinWidth(100);c9.setMinWidth(100);c10.setMinWidth(100);//        确定数据导入的列c1.setCellValueFactory(new PropertyValueFactory<>("id"));c2.setCellValueFactory(new PropertyValueFactory<>("name"));c3.setCellValueFactory(new PropertyValueFactory<>("clas"));c4.setCellValueFactory(new PropertyValueFactory<>("language"));c5.setCellValueFactory(new PropertyValueFactory<>("math"));c6.setCellValueFactory(new PropertyValueFactory<>("english"));c7.setCellValueFactory(new PropertyValueFactory<>("physics"));c8.setCellValueFactory(new PropertyValueFactory<>("chemistry"));c9.setCellValueFactory(new PropertyValueFactory<>("biology"));c10.setCellValueFactory(new PropertyValueFactory<>("score"));tv.getColumns().addAll(c1, c2, c3, c4, c5, c6, c7, c8, c9, c10);//        创建学生集合try {Connect.maginquire(students, s, a);} catch (Exception e) {e.printStackTrace();}tv.getItems().addAll(students);bp.setCenter(tv);}//    名字和班级   模糊查询表格static void maginit1(BorderPane bp, ArrayList<Student> students, String name, String clas) {//        中部————表格控件TableView<Student> tv = new TableView<Student>();
//        创建列TableColumn c1 = new TableColumn("学号");TableColumn c2 = new TableColumn("姓名");TableColumn c3 = new TableColumn("班级");TableColumn c4 = new TableColumn("语文");TableColumn c5 = new TableColumn("数学");TableColumn c6 = new TableColumn("英语");TableColumn c7 = new TableColumn("物理");TableColumn c8 = new TableColumn("化学");TableColumn c9 = new TableColumn("生物");TableColumn c10 = new TableColumn("总分");
//        表格列宽宽度设置c1.setMinWidth(100);c2.setMinWidth(100);c3.setMinWidth(100);c4.setMinWidth(100);c5.setMinWidth(100);c6.setMinWidth(100);c7.setMinWidth(100);c8.setMinWidth(100);c9.setMinWidth(100);c10.setMinWidth(100);//        确定数据导入的列c1.setCellValueFactory(new PropertyValueFactory<>("id"));c2.setCellValueFactory(new PropertyValueFactory<>("name"));c3.setCellValueFactory(new PropertyValueFactory<>("clas"));c4.setCellValueFactory(new PropertyValueFactory<>("language"));c5.setCellValueFactory(new PropertyValueFactory<>("math"));c6.setCellValueFactory(new PropertyValueFactory<>("english"));c7.setCellValueFactory(new PropertyValueFactory<>("physics"));c8.setCellValueFactory(new PropertyValueFactory<>("chemistry"));c9.setCellValueFactory(new PropertyValueFactory<>("biology"));c10.setCellValueFactory(new PropertyValueFactory<>("score"));tv.getColumns().addAll(c1, c2, c3, c4, c5, c6, c7, c8, c9, c10);//        创建学生集合try {Connect.maginquire(students, name, clas);} catch (Exception e) {e.printStackTrace();}tv.getItems().addAll(students);bp.setCenter(tv);}//    名字模糊查询表格static void init(BorderPane bp, ArrayList<Student> students, String name) {//        中部————表格控件TableView<Student> tv = new TableView<Student>();
//        创建列TableColumn c1 = new TableColumn("学号");TableColumn c2 = new TableColumn("姓名");TableColumn c3 = new TableColumn("性别");TableColumn c4 = new TableColumn("班级");TableColumn c5 = new TableColumn("地址");TableColumn c6 = new TableColumn("年龄");TableColumn c7 = new TableColumn("电话");
//        表格列宽宽度设置c1.setMinWidth(100);c2.setMinWidth(100);c3.setMinWidth(100);c4.setMinWidth(100);c5.setMinWidth(100);c6.setMinWidth(100);c7.setMinWidth(100);//        确定数据导入的列c1.setCellValueFactory(new PropertyValueFactory<>("id"));c2.setCellValueFactory(new PropertyValueFactory<>("name"));c3.setCellValueFactory(new PropertyValueFactory<>("gender"));c4.setCellValueFactory(new PropertyValueFactory<>("clas"));c5.setCellValueFactory(new PropertyValueFactory<>("address"));c6.setCellValueFactory(new PropertyValueFactory<>("age"));c7.setCellValueFactory(new PropertyValueFactory<>("phone"));tv.getColumns().addAll(c1, c2, c3, c4, c5, c6, c7);//        创建学生集合try {Connect.inquire(students, name);} catch (Exception e) {e.printStackTrace();}tv.getItems().addAll(students);bp.setCenter(tv);}//    id查询后表格static void init(BorderPane bp, ArrayList<Student> students, int id) {//        中部————表格控件TableView<Student> tv = new TableView<Student>();
//        创建列TableColumn c1 = new TableColumn("学号");TableColumn c2 = new TableColumn("姓名");TableColumn c3 = new TableColumn("性别");TableColumn c4 = new TableColumn("班级");TableColumn c5 = new TableColumn("地址");TableColumn c6 = new TableColumn("年龄");TableColumn c7 = new TableColumn("电话");
//        表格列宽宽度设置c1.setMinWidth(100);c2.setMinWidth(100);c3.setMinWidth(100);c4.setMinWidth(100);c5.setMinWidth(100);c6.setMinWidth(100);c7.setMinWidth(100);//        确定数据导入的列c1.setCellValueFactory(new PropertyValueFactory<>("id"));c2.setCellValueFactory(new PropertyValueFactory<>("name"));c3.setCellValueFactory(new PropertyValueFactory<>("gender"));c4.setCellValueFactory(new PropertyValueFactory<>("clas"));c5.setCellValueFactory(new PropertyValueFactory<>("address"));c6.setCellValueFactory(new PropertyValueFactory<>("age"));c7.setCellValueFactory(new PropertyValueFactory<>("phone"));tv.getColumns().addAll(c1, c2, c3, c4, c5, c6, c7);//        创建学生集合try {Connect.inquire(students, id);} catch (Exception e) {e.printStackTrace();}tv.getItems().addAll(students);bp.setCenter(tv);}}

2.Student


public class Student {private int id;private String name;private String gender;private String clas;private String address;private String age;private String phone;private String password;private int language;private int math;private int english;private int physics;private int chemistry;private int biology;private int score;public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public int getScore() {return score;}public void setScore(int score) {this.score = score;}public int getLanguage() {return language;}public void setLanguage(int language) {this.language = language;}public int getMath() {return math;}public void setMath(int math) {this.math = math;}public int getEnglish() {return english;}public void setEnglish(int english) {this.english = english;}public int getPhysics() {return physics;}public void setPhysics(int physics) {this.physics = physics;}public int getChemistry() {return chemistry;}public void setChemistry(int chemistry) {this.chemistry = chemistry;}public int getBiology() {return biology;}public void setBiology(int biology) {this.biology = biology;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}public String getClas() {return clas;}public void setClas(String clas) {this.clas = clas;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}public String getPhone() {return phone;}public void setPhone(String phone) {this.phone = phone;}}

3.Connect


import java.sql.*;
import java.util.ArrayList;
import java.util.Objects;public class Connect {/*** URL地址*/private static final String URL = "jdbc:mysql://127.0.0.1:3306/ycx?useSSL=false";/*** 登录数据库服务器的账号*/private static final String USER = "root";/*** 登录数据库服务器的密码*/private static final String PASSWORD = "15194538986a";/*** 返回数据库连接对象** @return*/public static Connection getConn() {try {return DriverManager.getConnection(URL, USER, PASSWORD);} catch (SQLException e) {e.printStackTrace();}return null;}/*** 关闭资源** @param rs* @param stat* @param conn*/public static void close(ResultSet rs, Statement stat, Connection conn) {try {if (rs != null) {rs.close();}if (stat != null) {stat.close();}if (conn != null) {conn.close();}} catch (SQLException e) {e.printStackTrace();}}/*** 封装通用的更新操作（即通过该方法实现对弈任意数据表的insert，update，delete操作）** @param sql    需要执行的SQL语句* @param params 执行SQL语句时需要传递进去参数* @return 执行结果*/public static boolean exeUpdate(String sql, Object... params) {//获取连接对象Connection conn = getConn();PreparedStatement ps = null;try {//获取预编译对象ps = conn.prepareStatement(sql);//执行参数赋值操作if (Objects.nonNull(params)) {//循环将所有的参数赋值for (int i = 0; i < params.length; i++) {ps.setObject(i + 1, params[i]);}}//执行更新return ps.executeUpdate() > 0;} catch (SQLException e) {e.printStackTrace();} finally {//关闭资源close(null, ps, conn);}return false;}//    学生登录public static int login(int id, String pwd) throws Exception {String sql = "select * from student where id=? and password=?";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setInt(1, id);pstmt.setString(2, pwd);ResultSet rs = pstmt.executeQuery();if (rs.next()) {return rs.getInt("id");} else {return 0;}}//    管理员登录public static boolean maglogin(String name, String pwd) throws Exception {String sql = "select * from admin_login_k where admin_id=? and admin_pass=?";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setString(1, name);pstmt.setString(2, pwd);ResultSet rs = pstmt.executeQuery();if (rs.next()) {return true;} else {return false;}}//    增加public static boolean add(String name, String gender, String clas, String address,String age, String phone, String password) throws Exception {String sql = "insert into student(name,gender,clas,address,age,phone,password) values (?,?,?,?,?,?,?)";return exeUpdate(sql, name, gender, clas, address, age, phone, password);}//    修改public static boolean update(String name, String gender, String clas, String address,String age, String phone, String password, int id) throws Exception {String sql = "update student set name=?,gender=?,clas=?,address=?,age=?,phone=?,password=? where id=?";return exeUpdate(sql, name, gender, clas, address, age, phone, password, id);}//    删除public static boolean delete(int id) {String sql = "delete from student where id=?";return exeUpdate(sql, id);}//    学生成绩修改public static boolean magupdate(int id, int language, int math, int english, int physics, int chemistry,int biology) throws Exception {String sql1 = "update score set language=?,math=?,english=? where student_id=?";String sql2 = "update elective set physics=?,chemistry=?,biology=? where student_id=?";return exeUpdate(sql1, language, math, english, id) && exeUpdate(sql2, physics, chemistry, biology, id);}//        模糊查询public static void inquire(ArrayList<Student> list, String name) throws Exception {String sql = "select * from student where name like ?";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setString(1, "%" + name + "%");ResultSet rs = pstmt.executeQuery();while(rs.next()) {Student student = new Student();student.setId(rs.getInt("id"));student.setName(rs.getString("name"));student.setGender(rs.getString("gender"));student.setClas(rs.getString("clas"));student.setAddress(rs.getString("address"));student.setAge(rs.getString("age"));student.setPhone(rs.getString("phone"));student.setPassword(rs.getString("password"));list.add(student);}//        释放资源rs.close();pstmt.close();}//        模糊查询--学生成绩public static void maginquire(ArrayList<Student> list, String s, int a) throws Exception {String sql = "";if (a == 1) {   //名字模糊查询sql = "select id,name,clas,language,math,english,physics,chemistry,biology,language+math+english+physics+chemistry+biology 'score' from student,score,elective where id=score.student_id and id=elective.student_id and name like?;";} else if (a == 2) {  //班级模糊查询sql = "select id,name,clas,language,math,english,physics,chemistry,biology,language+math+english+physics+chemistry+biology 'score' from student,score,elective where id=score.student_id and id=elective.student_id and clas like?;";}PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setString(1, "%" + s + "%");ResultSet rs = pstmt.executeQuery();while(rs.next()){Student student = new Student();student.setId(rs.getInt("id"));student.setName(rs.getString("name"));student.setClas(rs.getString("clas"));student.setLanguage(rs.getInt("language"));student.setMath(rs.getInt("math"));student.setEnglish(rs.getInt("english"));student.setPhysics(rs.getInt("physics"));student.setChemistry(rs.getInt("chemistry"));student.setBiology(rs.getInt("biology"));student.setScore(rs.getInt("score"));list.add(student);}//        释放资源rs.close();pstmt.close();}//        模糊查询--学生成绩public static void maginquire(ArrayList<Student> list, String name, String clas) throws Exception {//名字+班级String sql = "select id,name,clas,language,math,english,physics,chemistry,biology,language+math+english+physics+chemistry+biology 'score' from student,score,elective where id=score.student_id and id=elective.student_id and  name like? and  clas like?;";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setString(1, "%" + name + "%");pstmt.setString(2, "%" + clas + "%");ResultSet rs = pstmt.executeQuery();while (rs.next()) {Student student = new Student();student.setId(rs.getInt("id"));student.setName(rs.getString("name"));student.setClas(rs.getString("clas"));student.setLanguage(rs.getInt("language"));student.setMath(rs.getInt("math"));student.setEnglish(rs.getInt("english"));student.setPhysics(rs.getInt("physics"));student.setChemistry(rs.getInt("chemistry"));student.setBiology(rs.getInt("biology"));student.setScore(rs.getInt("score"));list.add(student);}//        释放资源rs.close();pstmt.close();}//        学号查询public static void inquire(ArrayList<Student> list, int id) throws Exception {String sql = "select * from student where id=?";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setInt(1, id);ResultSet rs = pstmt.executeQuery();if (rs.next()) {Student student = new Student();student.setId(rs.getInt("id"));student.setName(rs.getString("name"));student.setGender(rs.getString("gender"));student.setClas(rs.getString("clas"));student.setAddress(rs.getString("address"));student.setAge(rs.getString("age"));student.setPhone(rs.getString("phone"));list.add(student);}//        释放资源rs.close();pstmt.close();}//    成绩查询--学生public static void score(Student student, int id) throws Exception {String sql = "select id,name,clas,language,math,english,physics,chemistry,biology,language+math+english+physics+chemistry+biology 'score' from student,score,elective where id=score.student_id and id=elective.student_id and id=?;";PreparedStatement pstmt = getConn().prepareStatement(sql);pstmt.setInt(1, id);ResultSet rs = pstmt.executeQuery();if (rs.next()) {student.setLanguage(rs.getInt("language"));student.setMath(rs.getInt("math"));student.setEnglish(rs.getInt("english"));student.setLanguage(rs.getInt("language"));student.setMath(rs.getInt("math"));student.setEnglish(rs.getInt("english"));student.setPhysics(rs.getInt("physics"));student.setChemistry(rs.getInt("chemistry"));student.setBiology(rs.getInt("biology"));student.setScore(rs.getInt("score"));}//        释放资源rs.close();pstmt.close();}//   学生类初始化public static void student(ArrayList<Student> list) throws Exception {String sql = "select * from student ";PreparedStatement pstmt = getConn().prepareStatement(sql);ResultSet rs = pstmt.executeQuery();while (rs.next()) {//            获取数据int id = rs.getInt("id");String name = rs.getString("name");String gender = rs.getString("gender");String clas = rs.getString("clas");String address = rs.getString("address");String age = rs.getString("age");String phone = rs.getString("phone");String password=rs.getString("password");//            封装数据Student student = new Student();student.setId(id);student.setName(name);student.setGender(gender);student.setClas(clas);student.setAddress(address);student.setAge(age);student.setPhone(phone);student.setPassword(password);list.add(student);}
//        释放资源rs.close();pstmt.close();}//   学生类成绩初始化--管理员public static void magstudent(ArrayList<Student> list) throws Exception {String sql = "select id,name,clas,language,math,english,physics,chemistry,biology,language+math+english+physics+chemistry+biology 'score' from student,score,elective where id=score.student_id and id=elective.student_id; ";PreparedStatement pstmt = getConn().prepareStatement(sql);ResultSet rs = pstmt.executeQuery();while (rs.next()) {//            获取数据int id = rs.getInt("id");String name = rs.getString("name");String clas = rs.getString("clas");int language = rs.getInt("language");int math = rs.getInt("math");int english = rs.getInt("english");int physics = rs.getInt("physics");int chemistry = rs.getInt("chemistry");int biology = rs.getInt("biology");int score = rs.getInt("score");//            封装数据Student student = new Student();student.setId(id);student.setName(name);student.setClas(clas);student.setLanguage(language);student.setMath(math);student.setEnglish(english);student.setPhysics(physics);student.setChemistry(chemistry);student.setBiology(biology);student.setScore(score);list.add(student);}
//        释放资源rs.close();pstmt.close();}}

4.Main

public class Main {public static void main(String[] args) {View.launch(args);}
}

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