javaEE项目--琪琪线上餐厅系统

运行界面如下：

domain

package com.zretc.domian;public class Menu {private Integer id;private String name;private String price;private String briefIntroduction;public Menu() {}public Menu(Integer id, String name, String price, String briefIntroduction) {this.id = id;this.name = name;this.price = price;this.briefIntroduction = briefIntroduction;}public void setId(Integer id) {this.id = id;}public void setName(String name) {this.name = name;}public void setPrice(String price) {this.price = price;}public void setBriefIntroduction(String briefIntroduction) {this.briefIntroduction = briefIntroduction;}public Integer getId() {return id;}public String getName() {return name;}public String getPrice() {return price;}public String getBriefIntroduction() {return briefIntroduction;}@Overridepublic String toString() {return "Menu{" +"id=" + id +", name='" + name + '\'' +", price='" + price + '\'' +", briefIntroduction='" + briefIntroduction + '\'' +'}';}
}

package com.zretc.domian;public class User {
private Integer id;
private String username;
private String password;
private  Integer state;public Integer getState() {return state;}public void setState(Integer state) {this.state = state;}public User() {}public User(String username, String password) {this.username = username;this.password = password;}public void setId(Integer id) {this.id = id;}public void setUsername(String username) {this.username = username;}public void setPassword(String password) {this.password = password;}public Integer getId() {return id;}public String getUsername() {return username;}public String getPassword() {return password;}@Overridepublic String toString() {return "User{" +"id=" + id +", username='" + username + '\'' +", password='" + password + '\'' +", state=" + state +'}';}public Integer inte() {return  state ;}
}

servlet

package com.zretc.servlet;
import com.alibaba.druid.support.json.JSONUtils;
import com.zretc.domian.Menu;
import com.zretc.domian.User;
import com.zretc.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
@WebServlet("/ChaServlet")
public class ChaServlet extends HttpServlet {private static final JSONUtils JSON = null;JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("utf-8");List<Menu> list = template.query("SELECT name,briefIntroduction,price from menu", new BeanPropertyRowMapper<Menu>(Menu.class));Iterator<Menu> iterator = list.iterator();while (iterator.hasNext()){System.out.println(iterator.next());}HashMap map = new HashMap<>();map.put("setMenu",list);String jsonStr = JSON.toJSONString(map);PrintWriter writer = response.getWriter();writer.write(jsonStr);}protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doPost(request, response);}
}

package com.zretc.servlet;import com.alibaba.druid.support.json.JSONUtils;
import com.zretc.util.JDBCUtils;
import org.springframework.jdbc.core.JdbcTemplate;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;@WebServlet("/deleteServlet")
public class deleteServlet extends HttpServlet {private static final JSONUtils JSON = null;JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("utf-8");String name = request.getParameter("name");String text = request.getParameter("text");System.out.println(name);System.out.println(text);Integer update = template.update("delete from menu where name =?", name);if (update==1){System.out.println("菜品删除成功!");}else {System.out.println("菜品删除失败!");}Boolean flag;System.out.println(update ==1);flag=   update==1;HashMap<String,Boolean> map = new HashMap<>();map.put("flag",flag);//使用fastjson将java对象转换为json字符串String jsonStr = JSON.toJSONString(map);PrintWriter writer = response.getWriter();writer.write(jsonStr);}protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doPost(request, response);}
}

package com.zretc.servlet;import com.alibaba.druid.support.json.JSONUtils;
import com.zretc.domian.User;
import com.zretc.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;@WebServlet("/indexServlet")
public class indexServlet extends HttpServlet {private static final JSONUtils JSON = null;JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("utf-8");List<User> query = template.query("select * from userdenglu ", new BeanPropertyRowMapper<User>(User.class));System.out.println("66666");response.sendRedirect("../index.jsp");}protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doPost(request, response);}
}

package com.zretc.servlet;import com.alibaba.druid.support.json.JSONUtils;
import com.zretc.dao.Impl.UserDaoImpl;
import com.zretc.domian.User;
import com.zretc.service.Impl.UserServiceImpl;
import com.zretc.service.UserService;
import com.zretc.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;@WebServlet("/loginServlet")
public class loginServlet extends HttpServlet {private static final JSONUtils JSON = null;JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("utf-8");String username = request.getParameter("username");String password = request.getParameter("password");
//        System.out.println(username);
//        System.out.println(password);List<User> query = template.query("select * from userdenglu where username=? and password=?", new BeanPropertyRowMapper<User>(User.class), username, password);//        List<User> start = template.query("select state from userdenglu where username=? and password=?", new BeanPropertyRowMapper<User>(User.class), username, password); Boolean flag;Boolean flag;
//                System.out.println( null!=query&&query.size()!=0);flag=   null!=query&&query.size()!=0;HashMap<String,Boolean> map = new HashMap<>();map.put("flag",flag);//使用fastjson将java对象转换为json字符串String jsonStr = JSON.toJSONString(map);PrintWriter writer = response.getWriter();writer.write(jsonStr);}protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doPost(request,response);}
}

package com.zretc.servlet;import com.alibaba.druid.support.json.JSONUtils;
import com.zretc.util.JDBCUtils;
import org.springframework.jdbc.core.JdbcTemplate;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;@WebServlet("/MenuServlet")
public class MenuServlet extends HttpServlet {private static final JSONUtils JSON = null;JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("utf-8");String name = request.getParameter("name");String text = request.getParameter("text");String price = request.getParameter("price");Integer update = template.update("INSERT INTO menu(name,briefIntroduction,price) VALUES (?,?,?);", name,text,price);if (update==1){System.out.println("菜品添加成功!");}else {System.out.println("菜品添加失败!");}Boolean flag;System.out.println(update ==1);flag=   update==1;HashMap<String,Boolean> map = new HashMap<>();map.put("flag",flag);//使用fastjson将java对象转换为json字符串String jsonStr = JSON.toJSONString(map);PrintWriter writer = response.getWriter();writer.write(jsonStr);}protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doPost(request, response);}
}

package com.zretc.servlet;import com.alibaba.druid.support.json.JSONUtils;
import com.zretc.domian.User;
import com.zretc.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;@WebServlet("/registerServlet")
public class registerServlet extends HttpServlet {private static final JSONUtils JSON = null ;JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("utf-8");String username = request.getParameter("username");String password = request.getParameter("password");Integer update = template.update("INSERT INTO userdenglu(username,password) VALUES(?,?);",  username, password);if (update==1){System.out.println("用户注册成功!");}else {System.out.println("用户注册失败!");}Boolean flag;System.out.println(update!=1);flag=   update!=1;HashMap<String,Boolean> map = new HashMap<>();map.put("flag",flag);//使用fastjson将java对象转换为json字符串String jsonStr = JSON.toJSONString(map);PrintWriter writer = response.getWriter();writer.write(jsonStr);}protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doPost(request, response);}
}

package com.zretc.servlet;import com.alibaba.druid.support.json.JSONUtils;
import com.zretc.domian.Menu;
import com.zretc.domian.User;
import com.zretc.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.swing.text.html.HTMLDocument;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;@WebServlet("/xiugaiServlet")
public class xiugaiServlet extends HttpServlet {private static final JSONUtils JSON = null;JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("utf-8");String name = request.getParameter("l1");String price= request.getParameter("l2");List<Menu> query = template.query("select * from menu where name=?", new BeanPropertyRowMapper<Menu>(Menu.class), name);System.out.println(query.size()==0);//  request.setAttribute("flag",query.size()==0);if (query.size()==0){response.getWriter().write("该菜品:"+name+"  不存在");}else {response.sendRedirect("http://localhost/SpecialServing/uptade.jsp");}}protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doPost(request, response);}
}

service

package com.zretc.servlet.service;import com.alibaba.druid.support.json.JSONUtils;
import com.zretc.util.JDBCUtils;
import org.springframework.jdbc.core.JdbcTemplate;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;@WebServlet("/uptadeServlet")
public class uptadeServlet extends HttpServlet {private static final JSONUtils JSON = null;JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("utf-8");String name = request.getParameter("l1");String price= request.getParameter("l2");
//        String name2= request.getParameter("l3");l3String text= request.getParameter("text");Integer update = template.update("UPDATE menu SET briefIntroduction = ?,price=? WHERE `name` = ?;", text,price,name);if(update==1){response.sendRedirect("http://localhost/SpecialServing/index.html");}else{response.getWriter().write("修改失败");}}protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doPost(request, response);}
}

package com.zretc.service;import com.zretc.domian.User;import java.util.List;/*用户管理业务接口*/
public interface UserService {/*** 查找所有用户的信息* @return*/public List<User> findAll();/**** @return*/int add();
}

package com.zretc.service.Impl;import com.zretc.dao.Impl.UserDaoImpl;
import com.zretc.dao.UserDao;
import com.zretc.domian.User;
import com.zretc.service.UserService;import java.util.List;public class UserServiceImpl implements UserService {UserDao dao = new UserDaoImpl();@Overridepublic List<User> findAll() {return dao.findAll();}@Overridepublic int add() {return dao.add();}
}

util

package com.zretc.util;import com.alibaba.druid.pool.DruidDataSourceFactory;import javax.sql.DataSource;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;/*** JDBC工具类 使用Durid连接池*/
public class JDBCUtils {private static DataSource ds ;static {try {//1.加载配置文件Properties pro = new Properties();//使用ClassLoader加载配置文件，获取字节输入流InputStream is = JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties");pro.load(is);//2.初始化连接池对象ds = DruidDataSourceFactory.createDataSource(pro);} catch (IOException e) {e.printStackTrace();} catch (Exception e) {e.printStackTrace();}}/*** 获取连接池对象*/public static DataSource getDataSource(){return ds;}/*** 获取连接Connection对象*/public static Connection getConnection() throws SQLException {return  ds.getConnection();}
}

package com.zretc.util;import com.zretc.dao.Impl.UserDaoImpl;
import java.util.Iterator;
import java.util.List;public class Test {public static void main(String[] args) throws Exception{all();add();}protected static void all(){UserDaoImpl userDao=   new UserDaoImpl();List list= userDao.findAll();Iterator it   =list.iterator();while (it.hasNext()){System.out.println(it.next());}}protected  static void add(){}protected  static void demove(){}protected static void xiugai() {}
}

temp

package com.zretc.temp;import java.io.IOException;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import ceet.ac.cn.dao.AdminDao;
import ceet.ac.cn.model.Admin;public class AddServlet extends HttpServlet{  //添加数据private static final long serialVersionUID = 1L;protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {this.doPost(req, resp);}protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {String username = req.getParameter("username");String userpwd = req.getParameter("userpwd");Admin admin = new Admin();admin.setUsername(new String(username.getBytes("ISO-8859-1"),"UTF-8"));  //转值，中文需要转换为utf-8admin.setUserpwd(new String(userpwd.getBytes("ISO-8859-1"),"UTF-8"));AdminDao dao = new AdminDao();dao.addAdmin(admin);req.getRequestDispatcher("ShowServlet").forward(req, resp);}
}

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;import ceet.ac.cn.model.Admin;public class AdminDao {public List<Admin> getAllAdmin(){  //查询所有信息List<Admin> list = new ArrayList<Admin>();  //创建集合Connection conn = DbHelper.getConnection();String sql  = "select * from admin";  //SQL查询语句try {PreparedStatement pst = conn.prepareStatement(sql);ResultSet rst = pst.executeQuery();while (rst.next()) {Admin admin = new Admin();admin.setId(rst.getInt("id"));  //得到IDadmin.setUsername(rst.getString("username"));admin.setUserpwd(rst.getString("userpwd"));list.add(admin);}rst.close();  //关闭pst.close();  //关闭} catch (SQLException e) {e.printStackTrace();  //抛出异常}return list;  //返回一个集合}public boolean addAdmin(Admin admin){  //添加信息String sql = "INSERT INTO `admin`(`id`,`username`,`userpwd`) VALUES (?,?,?)";  //添加的SQL语句Connection conn = DbHelper.getConnection();try {PreparedStatement pst = conn.prepareStatement(sql);pst.setInt(1, admin.getId());pst.setString(2, admin.getUsername());pst.setString(3, admin.getUserpwd());int count = pst.executeUpdate();pst.close();return count>0?true:false;  //是否添加的判断} catch (SQLException e) {e.printStackTrace();}return false;}public boolean updateAdmin(Admin admin){  //修改String sql = "UPDATE `admin` SET `username`=?,`userpwd`=? WHERE `id` = ?";  //修改的SQL语句，根据ID修改Connection conn = DbHelper.getConnection();try {PreparedStatement pst = conn.prepareStatement(sql);pst.setString(1, admin.getUsername());pst.setString(2, admin.getUserpwd());pst.setInt(3, admin.getId());  //根据的IDint count = pst.executeUpdate();pst.close();  //关闭return count>0?true:false;  //是否修改的判断} catch (SQLException e) {e.printStackTrace();}return false;}public boolean deleteAdmin(int id){  //删除String sql = "delete from admin where id = ?";  //删除的SQL语句，根据ID删除Connection conn = DbHelper.getConnection();try {PreparedStatement pst = conn.prepareStatement(sql);pst.setInt(1, id);int count = pst.executeUpdate();pst.close();return count>0?true:false;  //是否删除的判断} catch (SQLException e) {e.printStackTrace();}return false;}public Admin selectAdminById(int id){  //根据ID进行查询Connection conn = DbHelper.getConnection();String sql  = "select * from admin where id = "+id;Admin admin = null;try {PreparedStatement pst = conn.prepareStatement(sql);ResultSet rst = pst.executeQuery();while (rst.next()) {admin = new Admin();admin.setId(rst.getInt("id"));admin.setUsername(rst.getString("username"));admin.setUserpwd(rst.getString("userpwd"));}rst.close();pst.close();} catch (SQLException e) {e.printStackTrace();}return admin;  //返回}
}

package com.zretc.temp;import java.sql.Connection;
import java.sql.DriverManager;
/*** 连接数据库* @author 画船听雨眠**/
public class DbHelper {private static String url = "jdbc:mysql://localhost:3306/admin";  //数据库地址private static String userName = "root";  //数据库用户名private static String passWord = "359129127";  //数据库密码private static Connection conn = null;private DbHelper(){}public static Connection getConnection(){if(null == conn){try {Class.forName("com.mysql.jdbc.Driver");conn = DriverManager.getConnection(url, userName, passWord);} catch (Exception e) {e.printStackTrace();}}return conn;}public static void main(String[] args) {  //测试数据库是否连通System.err.println(getConnection());}
}

package com.zretc.temp;import java.io.IOException;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import ceet.ac.cn.dao.AdminDao;public class DeleteServlet extends HttpServlet{  //删除数据private static final long serialVersionUID = 1L;protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {this.doPost(req, resp);}protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {String idStr = req.getParameter("id");  //删除数据的ID，根据ID删除if(idStr != null && !idStr.equals("")){int id = Integer.valueOf(idStr);AdminDao dao = new AdminDao();dao.deleteAdmin(id);}req.getRequestDispatcher("ShowServlet").forward(req, resp);}}

package com.zretc.temp;import java.io.Serializable;public class Admin implements Serializable{  //数据封装类private static final long serialVersionUID = 1L;private int id;private String username;private String userpwd;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getUserpwd() {return userpwd;}public void setUserpwd(String userpwd) {this.userpwd = userpwd;}}

package com.zretc.temp;import java.io.IOException;
import java.util.List;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import ceet.ac.cn.dao.AdminDao;
import ceet.ac.cn.model.Admin;public class ShowServlet  extends HttpServlet{  //显示全部数据private static final long serialVersionUID = 1L;protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {this.doPost(req, resp);}protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {AdminDao dao = new AdminDao();List<Admin> list = dao.getAllAdmin();req.setAttribute("list", list);req.getRequestDispatcher("index.jsp").forward(req, resp);}
}

package com.zretc.temp;import java.io.IOException;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import ceet.ac.cn.dao.AdminDao;
import ceet.ac.cn.model.Admin;public class UpdateServlet extends HttpServlet{  //修改private static final long serialVersionUID = 1L;protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {  //查询到选中ID的值所对应的数据String idStr = req.getParameter("id");if(idStr != null && !idStr.equals("")){int id = Integer.valueOf(idStr);AdminDao dao = new AdminDao();Admin admin = dao.selectAdminById(id);req.setAttribute("admin", admin);}req.getRequestDispatcher("update.jsp").forward(req, resp);}protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {  //根据此ID对数据的值进行修改String username = req.getParameter("username");String userpwd = req.getParameter("userpwd");String idStr = req.getParameter("id");Admin admin = new Admin();admin.setId(Integer.valueOf(idStr));admin.setUsername(new String(username.getBytes("ISO-8859-1"),"UTF-8"));admin.setUserpwd(new String(userpwd.getBytes("ISO-8859-1"),"UTF-8"));AdminDao dao = new AdminDao();dao.updateAdmin(admin);req.getRequestDispatcher("ShowServlet").forward(req, resp);}}

package com.zretc.dao;import com.zretc.domian.User;import java.util.List;public interface MenuDao {/*** 查询所有用户接口* @return*/public List<User> findAll();/*** 新增* @return*/int add();int delete();}

package com.zretc.dao;import com.zretc.domian.User;import java.util.List;/*** 用户操作的dao*/
public interface UserDao {/*** 查询所有用户接口* @return*/public List<User> findAll();/*** 新增* @return*/int add();}

package com.zretc.dao.Impl;import com.zretc.dao.MenuDao;
import com.zretc.domian.User;
import com.zretc.util.JDBCUtils;
import org.springframework.jdbc.core.JdbcTemplate;import java.util.List;public class MenuDaoImpl implements MenuDao {// 获取数据库连接JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());@Overridepublic List<User> findAll() {return null;}@Overridepublic int add() {return 0;}@Overridepublic int delete() {return 0;}
}

web页面

<!DOCTYPE html>
<html><head><title>Login</title><meta charset="utf-8"><link href="css/style.css" rel='stylesheet' type='text/css' /><meta name="viewport" content="width=device-width, initial-scale=1"><script src="jar/jquery-3.2.1.min.js"></script><script>$(window).ready(function () {//   var username = $("#username").val();// var password = $("password").val();$("#username").blur(function(){if($(this).val().length==0){alert("用户名不可以为空!!")}else{}});$("#password").blur(function(){if($(this).val().length<6){alert("密码长度小于6位!!")}else{}});$("#login").click(function(){var username = $("#username").val();var password = $("#password").val();if(username.length!=0 && (password.length>5 && password.length<7)) {$.ajax({url: '/loginServlet',type: 'post',async: false,dataType: "json",data: {username: username,password: password},success: function (data) {if (data != false) {alert("登录成功,即将跳转....")window.location.href = "../index/index.html";} else {alert("登录错误")}},error: function (request, json, e) {$("#login").html("服务端正在维护，请稍后重试。。。");}});return false;}else{alert("用户名或密码错误")}});})</script>
</head><body><div class="main"><div class="login-form"><h1>登 录</h1><div class="head"><a href="../register/index.html">  <img src="data:images/user.png" alt="" /></a></div><form><input type="text" class="text" placeholder="输入用户名" id="username"><input type="password" placeholder="输入密码"  id="password"><div class="submit"><input type="submit" id="login" value="登录"> </div><p><a href="../zj/index1.html">忘记 密码 ?</a></p></form></div>    </div></body></html>

太多了，剩下的页面部分，如果要的话，私信我。

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