public class Dog {private int number;private String name;private String strain;private String sex;private int age;private String matters;public int getNumber() {return number;}public void setNumber(int number) {this.number = number;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getStrain() {return strain;}public void setStrain(String strain) {this.strain = strain;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getMatters() {return matters;}public void setMatters(String matters) {this.matters = matters;}
}

package com.zhidisoft.dao;import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import com.zhidisoft.entity.Dog;//用来实现数据库的操作 连接、释放数据库 通用的增删改查
public class DatabaseAction {Connection conn = null;//连接数据库 public Connection getConnection(){String url = "jdbc:mysql://127.0.0.1:3306/test?" + "user=root&password=root&useUnicode=true&characterEncoding=UTF8";try {Class.forName("com.mysql.jdbc.Driver");//声明驱动的jar包conn = DriverManager.getConnection(url);//按照url提供的路径连接服务器} catch (ClassNotFoundException | SQLException e) {// TODO Auto-generated catch block
　　　　　　e.printStackTrace();}// 动态加载mysql驱动return conn;}//向数据库插入信息public int zhuce(Dog dog){conn=this.getConnection();//调用连接数据库方法，连接服务器String sql="insert into Dog()
values("+dog.getNumber()+",'"+dog.getName()+"','"+dog.getStrain()+"','"+dog.getSex()+"',"+dog.getAge()+",'"+dog.getMatters()+"')";
　　　　Statement st;int result=0;try {st = conn.createStatement();result=st.executeUpdate(sql);//执行sql语句，返回结果为int类型，受影响的行数conn.close();//关闭数据库连接} catch (SQLException e) {// TODO Auto-generated catch block
　　　　　　e.printStackTrace();}return result;}public int shanchu(int number){conn=this.getConnection();String sql = "delete from Dog where number = "+number;Statement st;int result = 0;try {st = conn.createStatement();result = st.executeUpdate(sql);conn.close();} catch (SQLException e) {// TODO Auto-generated catch block
　　　　　　e.printStackTrace();}return result;}public int genggai(String name,String matters){conn=this.getConnection();String sql = "update Dog set matters ='"+matters+"' where name = '"+name+"'";Statement st;int result = 0;try {st = conn.createStatement();result = st.executeUpdate(sql);conn.close();} catch (SQLException e) {// TODO Auto-generated catch block
　　　　　　e.printStackTrace();}return result;}public void chazhao(Dog dog){conn=this.getConnection();String sql = "select * from Dog";Statement st;try {st = conn.createStatement();ResultSet rs = st.executeQuery(sql);while (rs.next()) {//遍历输出查询记录System.out.println("编号："+rs.getInt("number")+"\t姓名 "+rs.getString("name")+"\t品种："+rs.getString("strain")+"\t性
别："+rs.getString("sex")+"\t年龄："+rs.getInt("age")+"\t病情："+rs.getString("matters"));
　　　　　　}conn.close();} catch (SQLException e) {// TODO Auto-generated catch block
　　　　　　e.printStackTrace();}}}

import java.sql.SQLException;
import java.util.Scanner;import com.zhidisoft.dao.DatabaseAction;
import com.zhidisoft.entity.Dog;public class Test {public static void main(String[] args) throws SQLException {DatabaseAction dz=new DatabaseAction();//实例化方法类//专注于业务逻辑System.out.println("欢迎来到宠物医院，请选择操作：1.注册 2.删除 3.更改 4.查询");@SuppressWarnings("resource")Scanner input=new Scanner(System.in);Dog dog = new Dog();String choice=input.next();if(choice.equals("1")){//进行注册操作 //收集数据 调用数据库的插入方法实现注册System.out.println("输入宠物的编号：");dog.setNumber(Integer.valueOf(input.next()));System.out.println("输入宠物的名字：");dog.setName(input.next());System.out.println("输入宠物的品种：");dog.setStrain(input.next());System.out.println("输入宠物的性别：");dog.setSex(input.next());System.out.println("输入宠物的年龄：");dog.setAge(Integer.valueOf(input.next()));System.out.println("输入宠物的病情：");dog.setMatters(input.next());//调用dao层的代码实现数据的插入int result=dz.zhuce(dog);if (result == 1) {//受影响行数为1，插入成功System.out.println("信息注册成功");}else{System.out.println("注册不成功，请检查输入信息是否完善");}}if (choice.equals("2")) {System.out.println("请输入要删除的编号：");dog.setNumber(Integer.valueOf(input.next()));int result = dz.shanchu(dog.getNumber());if (result != 0) {//有删除的记录，受影响行数不为零System.out.println("编号相对应狗信息删除成功");}else{System.out.println("未找到此编号的狗信息");}}if (choice.equals("3")) {System.out.println("请输入要更病情的狗的名字");dog.setName(input.next());System.out.println("请输入要更改的病情");dog.setMatters(input.next());int result = dz.genggai(dog.getName(), dog.getMatters());if (result == 0) {//修改成功，受影响条目不为零System.out.println("没有找到名字叫做"+dog.getName()+"的狗");}else{System.out.println("更改成功");}}if (choice.equals("4")) {//调用查询方法，遍历输出所有结果
　　　　　　dz.chazhao(dog);    }}
}