/*
 Navicat Premium Data Transfer

 Source Server         : MYSQL
 Source Server Type    : MySQL
 Source Server Version : 80013
 Source Host           : localhost:3306
 Source Schema         : jsp_dorm_management

 Target Server Type    : MySQL
 Target Server Version : 80013
 File Encoding         : 65001

 Date: 28/02/2022 17:24:06
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for admin
-- ----------------------------
DROP TABLE IF EXISTS `admin`;
CREATE TABLE `admin`  (
  `username` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
  `password` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = DYNAMIC;

-- ----------------------------
-- Records of admin
-- ----------------------------
INSERT INTO `admin` VALUES ('admin', 'admin');

-- ----------------------------
-- Table structure for dorm
-- ----------------------------
DROP TABLE IF EXISTS `dorm`;
CREATE TABLE `dorm`  (
  `id` int(11) NOT NULL,
  `name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
  `num` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
  `head` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of dorm
-- ----------------------------
INSERT INTO `dorm` VALUES (1001, '燕园一栋', '4', '张三');
INSERT INTO `dorm` VALUES (1002, '燕园二栋', '4', '李四');
INSERT INTO `dorm` VALUES (1003, '燕园三栋', '4', '王五');
INSERT INTO `dorm` VALUES (1004, '燕园四栋', '4', '赵六');

SET FOREIGN_KEY_CHECKS = 1;

5.系统截图

二、系统展示

1.登录系统

2.系统主页

3.新增宿舍

4.修改宿舍

三、部分代码

AdminDaoImpl

package com.sjsq.dao.impl;

import com.sjsq.dao.AdminDao;
import com.sjsq.utils.DBUtil;
import com.sjsq.entity.Admin;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * @author: shuijianshiqing
 * @date: 2022-02-25
 * @description: 登录系统实现
 */
public class AdminDaoImpl implements AdminDao 

    /**
     * 登录系统
     * @param admin
     * @return
     */
    @Override
    public Admin login(Admin admin) 
        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try 
            // 1.获取数据库连接
            con = DBUtil.getConnection();
            // 2.写sql
            String sql = "select * from admin where username = ? and password = ?";
            // 3.预编译
            ps = con.prepareStatement(sql);
            // 4.设置值
            ps.setObject(1, admin.getUsername());
            ps.setObject(2, admin.getPassword());
            rs = ps.executeQuery();
            Admin adminLogin = null;
            if (rs.next()) 
                adminLogin = new Admin();
                // 从数据库中获取值到实体类的setter方法中
                adminLogin.setUsername(rs.getString("username"));
                adminLogin.setPassword(rs.getString("password"));

                // 返回的是你查询出来的完整的对象
                return adminLogin;

            
         catch (ClassNotFoundException e) 
            e.printStackTrace();
         catch (SQLException e) 
            e.printStackTrace();
         finally 
            // 关闭资源，避免出现异常
            DBUtil.close(con, ps, rs);
        
        return null;

DormDaoImpl

package com.sjsq.dao.impl;

import com.sjsq.dao.DormDao;
import com.sjsq.entity.Dorm;
import com.sjsq.utils.DBUtil;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * @author: shuijianshiqing
 * @date: 2022-02-25
 * @description:
 */
public class DormDaoImpl implements DormDao 
    @Override
    public List<Dorm> selectAll(String sql, Object[] arr) 
        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;

        try 
            // 1.连接数据库
            con = DBUtil.getConnection();
            // 2.预编译
            ps = con.prepareStatement(sql);
            if (arr != null) 
                for (int i = 0; i < arr.length; i++) 
                    // 传入sql的参数,向上转型,某个栏位的查询
                    ps.setObject(i + 1, arr[i]);
                
            
            // 3.执行sql
            rs = ps.executeQuery();
            // 4.保存查询出来的数据到list
            List<Dorm> list = new ArrayList<>();
            while (rs.next()) 

                Dorm dorm = new Dorm();

                dorm.setId(rs.getInt("id"));
                dorm.setName(rs.getString("name"));
                dorm.setNum(rs.getString("num"));
                dorm.setHead(rs.getString("head"));

                list.add(dorm);
            
            return list;

         catch (Exception e) 
            e.printStackTrace();
         finally 
            // 关闭链接，避免数据库连接过多
            DBUtil.close(con, ps, rs);
        
        return null;
    

    @Override
    public Dorm selectDorm(Integer id) 

        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try 
            // 1.连接数据库
            con = DBUtil.getConnection();
            // 2.预编译
            String sql = "select * from dorm where id = ?";
            ps = con.prepareStatement(sql);
            ps.setInt(1,id);
            // 3.执行sql
            rs = ps.executeQuery();
            while (rs.next())
                Dorm dorm = new Dorm();
                dorm.setId(rs.getInt("id"));
                dorm.setName(rs.getString("name"));
                dorm.setNum(rs.getString("num"));
                dorm.setHead(rs.getString("head"));

                return dorm;
            
         catch (ClassNotFoundException e) 
            e.printStackTrace();
         catch (SQLException e) 
            e.printStackTrace();
        finally 
            // 关闭资源，避免出现异常
            DBUtil.close(con,ps,rs);
        
        return null;
    

    @Override
    public boolean addDorm(Dorm dorm) 
        String sql = "insert into dorm values (?,?,?,?)";
        List<Object> list = new ArrayList<Object>();

        list.add(dorm.getId());
        list.add(dorm.getName());
        list.add(dorm.getNum());
        list.add(dorm.getHead());

        boolean flag = DBUtil.addUpdateDelete(sql,list.toArray());
        if(flag)
            return true;
        else 
            return false;
        
    

    @Override
    public boolean updateDorm(Dorm dorm) 
        String sql = "update dorm set name=?,num=?,head=? where id=?";
        List<Object> list = new ArrayList<Object>();


        list.add(dorm.getName());
        list.add(dorm.getNum());
        list.add(dorm.getHead());
        // 注意id在最后面
        list.add(dorm.getId());

        boolean flag = DBUtil.addUpdateDelete(sql,list.toArray());
        if(flag)
            return true;
        else 
            return false;
        
    

    @Override
    public boolean deleteDorm(Integer id) 
        String sql = "delete from dorm where id=?";
        List<Object> list = new ArrayList<Object>();

        list.add(id);

        boolean flag = DBUtil.addUpdateDelete(sql,list.toArray());
        if(flag)
            return true;
        else 
            return false;

dorm-add.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>新增宿舍</title>
    <link rel="stylesheet" type="text/css" href="css/common.css">
</head>
<body>
<%-- 头部 --%>
<jsp:include page="top.jsp"/>

<h1>新增宿舍</h1>
<hr/>

<div id="before">
    <a href="javascript: window.history.go(-1)">返回上一级</a>
</div>
</br>

<form action="dorm-add-do.jsp" method="post" name="addForm">
    <div>
        <tr>
            <label>宿舍编号：</label>
            <input type="text" name="id" id="id" placeholder="请输入宿舍编号">
        </tr>
    </div>
    <div>
        <tr>
            <label>宿舍名称：</label>
            <input type="text" name="name" id="name" placeholder="请输入宿舍名称">
        </tr>
    </div>
    <div>
        <tr>
            <label>宿舍人数：</label>
            <input type="text" name="num" id="num" placeholder="请输入宿舍人数">
        </tr>
    </div>

    <div>
        <tr>
            <label>宿舍长名：</label>
            <input type="text" name="headname" id="headname" placeholder="请输入宿舍长名">
        </tr>
    </div>

    <br>
    <div id="submit">
        <tr>
            <button type="submit" onclick="return checkForm()">添加</button>
            <button type="reset">重置</button>

        </tr>
    </div>
</form>

<script type="text/javascript">
    function checkForm() 
        var id = addForm.id.value;
        var name = addForm.name.value;
        // 教职工号和姓名不能为空
        if (id == "" || id == null) 
            alert("请输入宿舍编号");
            addForm.id.focus();
            return false;
         else if (name == "" || name == null) 
            alert("请输入宿舍名称");
            addForm.name.focus();
            return false;
        
        return true;
    
</script>

<%-- 底部 --%>
<jsp:include page="bottom.jsp"/>
</body>
</html>

dorm-add-do.jsp

<%@ page import="com.sjsq.entity.Dorm" %>
<%@ page import="com.sjsq.service.DormService" %>
<%@ page import="com.sjsq.service.impl.DormServiceImpl" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>新增宿舍</title>
</head>
<body>
<%
    // 设置获取注册时的编码为UTF-8
    request.setCharacterEncoding("UTF-8");

    //获取teacher-add.jsp页面提交的账号和密码,注意传过来的是字符串需要进行转化为对应的类型
    Integer id = Integer.parseInt(request.getParameter("id"));
    String name = request.getParameter("name");
    String num = request.getParameter("num");
    String head = request.getParameter("headname");



    // 将信息保存到实体类中
    Dorm dorm = new Dorm();

    dorm.setId(id);
    dorm.setName(name);
    dorm.setNum(num);
    dorm.setHead(head);

    System.out.println("添加的宿舍信息");
    System.out.println(dorm);



    // 将数据写入到数据库
    DormService dormService = new DormServiceImpl();
    boolean flag = dormService.addDorm(dorm);

    if(flag)
        response.sendRedirect("main.jsp");
    else
        response.sendRedirect("error.jsp");
    
%>
</body>
</html>