content
Java+JSP system series implementation
Java+Servlet system series implementation
Java+SSM system series implementation
Java+SSH system series implementation
Java+Springboot system series implementation
1. System introduction
1. Development environment
Development tool: IDEA2018
JDK version: Jdk1.8
Mysql version: 8.0.13
2. Technical selection
Java+Jsp+Mysql
3. System function
1. Log in to the system;
2. The administrator's addition, deletion and modification of dormitory information.
4. Database file
/*
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. System screenshot
2. System display
1. Log in to the system
2. System home page
3. Add a new dormitory
4. Modify the dormitory
3. Part of the code
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>
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1. For more JavaWeb systems, please pay attention to the column.
2. For more JavaSwing systems, please pay attention to the column.
2. Source code download
sql is under the sql folder
Java+JSP+Mysql realizes Web student dormitory management system
3. Run the project
How IDEA Imports JavaWeb Project Super Detailed Video Tutorial
4. Remarks
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