javaweb 课程管理系统代码分析
1 <%@ page language="java" contentType="text/html; charset=UTF-8"
2 pageEncoding="UTF-8"%>
3 <!DOCTYPE html>
4 <html>
5 <head>
6 <meta charset="UTF-8">
7 <title>首页</title>
8 <style>
9 .a{
10 font-size: 26px;
11 margin-top: 40px;
12 }
13 </style>
14 </head>
15 <body>
16 <div align="center">
17 <h1>课程基本信息管理系统</h1> <!-- 系统主页 -->
18 <hr align="center" width="50%" />
19 <div class="a">
20 <a href="add.jsp">课程信息录入</a> <!-- 页面跳转 -->
21 </div>
22 <div class="a">
23 <a href="CourseServlet?method=list">课程信息修改</a> <!-- 页面跳转 -->
24 </div>
25 <div class="a">
26 <a href="del.jsp">课程信息删除</a> <!-- 页面跳转 -->
27 </div>
28 <div class="a">
29 <a href="search.jsp">课程信息查询</a> <!-- 页面跳转 -->
30 </div>
31 </div>
32 </body>
33 </html>
主页面代码
1 <%@ page language="java" contentType="text/html; charset=UTF-8"
2 pageEncoding="UTF-8"%>
3 <!DOCTYPE html>
4 <html>
5 <head>
6 <meta charset="UTF-8">
7 <title>课程信息录入</title>
8 <style>
9 .a{
10 margin-top: 20px;
11 }
12 .b{
13 font-size: 20px;
14 width: 160px;
15 color: white;
16 background-color: greenyellow;
17 }
18 </style>
19 </head>
20
21 <body>
22 <%
23 Object message = request.getAttribute("message");
24 if(message!=null && !"".equals(message)){
25
26 %>
27 <script type="text/javascript">
28 alert("<%=request.getAttribute("message")%>");
29 </script>
30 <%} %>
31 <div align="center">
32 <h1 style="color: red;">课程信息录入</h1>
33 <a href="index.jsp">返回主页</a>
34 <form action="CourseServlet?method=add" method="post" onsubmit="return check()">
35 <div class="a">
36 课程名称<input type="text" id="name" name="name"/>
37 </div>
38 <div class="a">
39 任课教师<input type="text" id="teacher" name="teacher" />
40 </div>
41 <div class="a">
42 上课地点<input type="text" id="classroom" name="classroom" />
43 </div>
44 <div class="a">
45 <button type="submit" class="b">保 存</button>
46 </div>
47 </form>
48 </div>
49 <script type="text/javascript">
50 function check() {
51 var name = document.getElementById("name");;
52 var teacher = document.getElementById("teacher");
53 var classroom = document.getElementById("classroom");
54
55 //非空
56 if(name.value == ‘‘) {
57 alert(‘课程名称为空‘);
58 name.focus();
59 return false;
60 }
61 if(teacher.value == ‘‘) {
62 alert(‘教师为空‘);
63 teacher.focus();
64 return false;
65 }
66 if(classroom.value == ‘‘) {
67 alert(‘上课地点为空‘);
68 classroom.focus();
69 return false;
70 }
71
72 //教师
73 if(teacher.value != ‘王建民‘ && teacher.value != ‘王辉‘ && teacher.value != ‘刘丹‘ && teacher.value != ‘刘立嘉‘ && teacher.value != ‘杨子光‘){
74 alert(‘教师名称错误‘);
75 return false;
76 }
77
78 //教室
79 if(!/^基教/.test(classroom.value) && !/^一教/.test(classroom.value) && !/^二教/.test(classroom.value) && !/^三教/.test(classroom.value)) {
80 alert(‘上课地点错误‘);
81 return false;
82 }
83 }
84 </script>
85 </body>
86 </html>
录入界面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
.a{
margin-top: 20px;
}
.b{
font-size: 20px;
width: 160px;
color: white;
background-color: greenyellow;
}
</style>
</head>
<body>
<%
Object message = request.getAttribute("message");
if(message!=null && !"".equals(message)){
%>
<script type="text/javascript">
alert("<%=request.getAttribute("message")%>");
</script>
<%} %>
<div align="center">
<h1 style="color: red;">课程信息删除</h1>
<a href="index.jsp">返回主页</a>
<form action="CourseServlet?method=getcoursebyname" method="post" onsubmit="return check()">
<div class="a">
课程名称<input type="text" id="name" name="name"/>
</div>
<div class="a">
<button type="submit" class="b">查 找</button>
</div>
</form>
</div>
<script type="text/javascript">
function check() {
var name = document.getElementById("name");;
//非空
if(name.value == ‘‘) {
alert(‘课程名称为空‘);
name.focus();
return false;
}
}
</script>
</body>
</html>
删除界面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
.a{
margin-top: 20px;
}
.b{
font-size: 20px;
width: 160px;
color: white;
background-color: greenyellow;
}
</style>
</head>
<body>
<div align="center">
<h1 style="color: red;">课程信息查询</h1>
<a href="index.jsp">返回主页</a>
<form action="CourseServlet?method=search" method="post" onsubmit="return check()">
<div class="a">
课程名称<input type="text" id="name" name="name"/>
</div>
<div class="a">
任课教师<input type="text" id="teacher" name="teacher" />
</div>
<div class="a">
上课地点<input type="text" id="classroom" name="classroom" />
</div>
<div class="a">
<button type="submit" class="b">查 询</button>
</div>
</form>
</div>
<script type="text/javascript">
function check() {
var name = document.getElementById("name");;
var teacher = document.getElementById("teacher");
var classroom = document.getElementById("classroom");
//非空
if(name.value == ‘‘ && teacher.value == ‘‘ && classroom.value == ‘‘) {
alert(‘请填写一个条件‘);
return false;
}
}
</script>
</body>
</html>
查询界面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
.a{
margin-top: 20px;
}
.b{
font-size: 20px;
width: 160px;
color: white;
background-color: greenyellow;
}
</style>
</head>
<body>
<%
Object message = request.getAttribute("message");
if(message!=null && !"".equals(message)){
%>
<script type="text/javascript">
alert("<%=request.getAttribute("message")%>");
</script>
<%} %>
<div align="center">
<h1 style="color: red;">课程信息修改</h1>
<a href="index.jsp">返回主页</a>
<form action="CourseServlet?method=update" method="post" onsubmit="return check()">
<div class="a">
课程名称<input type="text" id="name" name="name" value="${course.name}"/>
</div>
<div class="a">
任课教师<input type="text" id="teacher" name="teacher" value="${course.teacher}"/>
</div>
<div class="a">
上课地点<input type="text" id="classroom" name="classroom" value="${course.classroom}"/>
</div>
<input type="hidden" id="id" name="id" value="${course.id}"/>
<div class="a">
<button type="submit" class="b">修 改</button>
</div>
</form>
</div>
<script type="text/javascript">
function check() {
var name = document.getElementById("name");;
var teacher = document.getElementById("teacher");
var classroom = document.getElementById("classroom");
//非空
if(name.value == ‘‘) {
alert(‘课程名称为空‘);
name.focus();
return false;
}
if(teacher.value == ‘‘) {
alert(‘教师为空‘);
teacher.focus();
return false;
}
if(classroom.value == ‘‘) {
alert(‘上课地点为空‘);
classroom.focus();
return false;
}
//教师
if(teacher.value != ‘王建民‘ && teacher.value != ‘王辉‘ && teacher.value != ‘刘丹‘ && teacher.value != ‘刘立嘉‘ && teacher.value != ‘杨子光‘){
alert(‘教师名称错误‘);
return false;
}
//教室
if(!/^基教/.test(classroom.value) && !/^一教/.test(classroom.value) && !/^二教/.test(classroom.value) && !/^三教/.test(classroom.value)) {
alert(‘上课地点错误‘);
return false;
}
}
</script>
</body>
</html>
修改界面
eclipse连接数据库代码
package com;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class DBUtil {
public static String db_url = "jdbc:mysql://localhost:3306/course?useSSL=false";
public static String db_user = "root";
public static String db_pass = "123456";
public static Connection getConn () {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");//加载驱动
conn = DriverManager.getConnection(db_url, db_user, db_pass);
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
/**
* 关闭连接
* @param state
* @param conn
*/
public static void close (Statement state, Connection conn) {
if (state != null) {
try {
state.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close (ResultSet rs, Statement state, Connection conn) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (state != null) {
try {
state.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
原文地址：https://www.cnblogs.com/kt-xb/p/10092449.html
时间： 2024-10-09 09:43:35