目录
一、系统介绍
1.开发环境
开发工具：IDEA2018
JDK版本：Jdk1.8
Mysql版本：8.0.13
2.技术选型
Java+Jsp+Mysql
3.系统功能
1.登录系统；
2.管理员对学生成绩的增删改查。
4.数据库文件
/*
Navicat Premium Data Transfer
Source Server : MYSQL
Source Server Type : MySQL
Source Server Version : 80013
Source Host : localhost:3306
Source Schema : jsp_score_management
Target Server Type : MySQL
Target Server Version : 80013
File Encoding : 65001
Date: 02/03/2022 17:32:29
*/
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 score
-- ----------------------------
DROP TABLE IF EXISTS `score`;
CREATE TABLE `score` (
`id` int(11) NOT NULL,
`name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
`subject` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
`score` 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 score
-- ----------------------------
INSERT INTO `score` VALUES (1001, '张三', '数学', '99');
INSERT INTO `score` VALUES (1001, '张三', '英语', '80');
INSERT INTO `score` VALUES (1002, '李四', '数学', '80');
INSERT INTO `score` VALUES (1002, '李四', '英语', '90');
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.新增成绩
4.修改成绩
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: 2022-03-01
* @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;
}
}
ScoreDaoImpl
package com.sjsq.dao.impl;
import com.sjsq.dao.ScoreDao;
import com.sjsq.entity.Score;
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: 2022-03-02
* @description:
*/
public class ScoreDaoImpl implements ScoreDao {
@Override
public List<Score> 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<Score> list = new ArrayList<>();
while (rs.next()) {
Score score = new Score();
score.setId(rs.getInt("id"));
score.setName(rs.getString("name"));
score.setSubject(rs.getString("subject"));
score.setScore(rs.getString("score"));
list.add(score);
}
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 Score selectScore(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 score where id = ?";
ps = con.prepareStatement(sql);
ps.setInt(1, id);
// 3.执行sql
rs = ps.executeQuery();
while (rs.next()) {
Score score = new Score();
score.setId(rs.getInt("id"));
score.setName(rs.getString("name"));
score.setSubject(rs.getString("subject"));
score.setScore(rs.getString("score"));
return score;
}
} 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 addScore(Score score) {
String sql = "insert into score values (?,?,?,?)";
List<Object> list = new ArrayList<Object>();
list.add(score.getId());
list.add(score.getName());
list.add(score.getSubject());
list.add(score.getScore());
boolean flag = DBUtil.addUpdateDelete(sql, list.toArray());
if (flag) {
return true;
} else {
return false;
}
}
@Override
public boolean updateScore(Score score) {
String sql = "update score set name=?,subject=?,score=? where id=?";
List<Object> list = new ArrayList<Object>();
list.add(score.getName());
list.add(score.getSubject());
list.add(score.getScore());
// 注意id在最后面
list.add(score.getId());
boolean flag = DBUtil.addUpdateDelete(sql, list.toArray());
if (flag) {
return true;
} else {
return false;
}
}
@Override
public boolean deleteScore(Integer id) {
String sql = "delete from score 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;
}
}
}
score-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>新增成绩</title>
<link rel="stylesheet" type="text/css" href="css/common.css">
</head>
<body>
<%-- 头部 --%>
<jsp:include page="top.jsp"/>
<h1>新增成绩</h1>
<hr/>
<div id="before">
<a href="javascript: window.history.go(-1)">返回上一级</a>
</div>
</br>
<form action="score-add-do.jsp" method="post" name="addForm">
<div>
<tr>
<label>学号：</label>
<input type="text" name="id" id="id" placeholder="请输入学号">
</tr>
</div>
<div>
<tr>
<label>姓名：</label>
<input type="text" name="name" id="name" placeholder="请输入姓名">
</tr>
</div>
<div>
<tr>
<label>科目：</label>
<input type="text" name="subject" id="subject" placeholder="请输入科目">
</tr>
</div>
<div>
<tr>
<label>分数：</label>
<input type="text" name="score" id="score" placeholder="请输入分数">
</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;
// 成绩编号和成绩名称不能为空
if (id == "" || id == null) {
alert("请输入成绩编号");
addForm.id.focus();
return false;
} else if (name == "" || name == null) {
alert("请输入成绩名称");
addForm.name.focus();
return false;
}
return true;
}
</script>
<%-- 底部 --%>
<jsp:include page="bottom.jsp"/>
</body>
</html>
score-add-do.jsp
<%@ page import="com.sjsq.entity.Score" %>
<%@ page import="com.sjsq.service.ScoreService" %>
<%@ page import="com.sjsq.service.impl.ScoreServiceImpl" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>新增成绩</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 subject = request.getParameter("subject");
String score = request.getParameter("score");
// 将信息保存到实体类中
Score score1 = new Score();
score1.setId(id);
score1.setName(name);
score1.setSubject(subject);
score1.setScore(score);
System.out.println("添加的成绩信息");
System.out.println(score1);
// 将数据写入到数据库
ScoreService scoreService = new ScoreServiceImpl();
boolean flag = scoreService.addScore(score1);
if(flag){
response.sendRedirect("main.jsp");
}else{
response.sendRedirect("error.jsp");
}
%>
</body>
</html>
score-update.jsp
<%@ page import="com.sjsq.entity.Score" %>
<%@ page import="com.sjsq.service.ScoreService" %>
<%@ page import="com.sjsq.service.impl.ScoreServiceImpl" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改成绩</title>
<link rel="stylesheet" type="text/css" href="css/common.css">
</head>
<body>
<%-- 头部 --%>
<jsp:include page="top.jsp"/>
<h1>修改成绩</h1>
<hr/>
<%
//获取main.jsp页面的id
Integer id = Integer.parseInt(request.getParameter("id"));
ScoreService ScoreService = new ScoreServiceImpl();
Score score = ScoreService.selectScore(id);
%>
<div>
<a href="javascript: window.history.go(-1)">返回上一级</a>
</div>
</br>
<form action="score-update-do.jsp" method="post" id="addForm">
<div>
<%-- 学号 --%>
<tr>
<label>学号：</label>
<input type="text" name="id" id="id" placeholder="请输入学号" value="<%=score.getId()%>" readonly="true">
</tr>
</div>
<div>
<tr>
<label>姓名：</label>
<input type="text" name="name" id="name" placeholder="请输入姓名" value="<%=score.getName()%>" autofocus="autofocus">
</tr>
</div>
<div>
<tr>
<label>科目：</label>
<input type="text" name="subject" id="subject" placeholder="请输入科目" value="<%=score.getSubject()%>">
</tr>
</div>
<div>
<tr>
<label>成绩：</label>
<input type="text" name="score" id="score" placeholder="请输入成绩" value="<%=score.getScore()%>">
</tr>
</div>
<br>
<div id="submit">
<tr>
<button type="submit" onclick="return checkForm()">修改</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;
// 成绩编号和成绩名称不能为空
if (id == "" || id == null) {
alert("请输入成绩编号");
addForm.id.focus();
return false;
} else if (name == "" || name == null) {
alert("请输入成绩名称");
addForm.name.focus();
return false;
}
return true;
}
</script>
<%-- 底部 --%>
<jsp:include page="bottom.jsp"/>
</body>
</html>
score-update-do.jsp
<%@ page import="com.sjsq.entity.Score" %>
<%@ page import="com.sjsq.service.ScoreService" %>
<%@ page import="com.sjsq.service.impl.ScoreServiceImpl" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改成绩</title>
</head>
<body>
<%
// 设置获取注册时的编码为UTF-8
request.setCharacterEncoding("UTF-8");
//获取teacher-update.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 subject = request.getParameter("subject");
String score = request.getParameter("score");
// 将信息保存到实体类中
// 将信息保存到实体类中
Score score1 = new Score();
score1.setId(id);
score1.setName(name);
score1.setSubject(subject);
score1.setScore(score);
System.out.println("修改的成绩信息");
System.out.println(score1);
// 将数据写入到数据库
ScoreService scoreService = new ScoreServiceImpl();
boolean flag = scoreService.updateScore(score1);
if(flag){
response.sendRedirect("main.jsp");
}else{
response.sendRedirect("error.jsp");
}
%>
</body>
</html>
四、其他
1.更多系统
Java+JSP系统系列实现
Java+Servlet系统系列实现
Java+SSM系统系列实现
Java+SSH系统系列实现
Java+Springboot系统系列实现
Java+Springboot+H-ui+Maven实现营销管理系统
Java+Springboot+Bootstrap+Maven实现网上商城系统
Java+Springboot+Bootstrap+Maven实现景区旅游管理系统
1.更多JavaWeb系统请关注专栏。
https://blog.csdn.net/helongqiang/category_10020130.html2.更多JavaSwing系统请关注专栏。
https://blog.csdn.net/helongqiang/category_6229101.html2.源码下载
sql在sql文件夹下面
3.运行项目
4.备注
如有侵权请联系我删除。
5.支持博主
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