学生管理系统利用网页较为成熟的优化。。。

基础的web页面

 1 <?xml version="1.0" encoding="ISO-8859-1"?>
 2
 3 <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
 4   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 5   xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
 6                       http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
 7   version="3.1"
 8   metadata-complete="true">
 9
10   <display-name>Welcome to Tomcat</display-name>
11   <description>
12      Welcome to Tomcat
13   </description>
14   <!--
15   表示系统如果静止30分钟，则服务器分配的sessionID会自动改变。。。
16   -->
17   <session-config>
18   <session-timeout>30</session-timeout>
19   </session-config>
20   <welcome-file-list>
21   <!--<welcome-file>index.html</welcome-file>-->
22  <welcome-file>index.jsp</welcome-file>
23
24   </welcome-file-list>
25 </web-app>
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <frameSet rows="20%,*">
10     <frame  src="title.jsp"/>
11
12     <frameset cols="20%,*">
13     <frame src="menu.jsp"/>
14     <frame src="main.jsp"/>
15
16     </frameset>
17
18
19
20
21
22 </frameSet>
23
24 </html>

标题栏

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10     <h1 align="center"> <font size="5" color="#ff0000">欢迎进入学生管理系统</font></h1>
11 </body>
12 </html>

菜单栏

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 <ul>
11     <li><a href="stuList.jsp" target="_blank">查看学生信息</a></li>
12     <li><a href="add.jsp" target="_blank">添加学生</a></li>
13 </ul>
14
15 </body>
16 </html>

为了保护学生的信息，首先必须要登录！！

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>学生登录</title>
 8 </head>
 9 <body>
10 <div  align="center">
11     <h1>学生登录</h1>
12     <hr>
13
14     <form action="doLogin.jsp" method="post">
15     <table>
16         <tr>
17             <td>学号：</td><td><input type="text" name="stuID"></td>
18             <td rowspan="3"><%=request.getAttribute("ErrorMSG")==null?"":request.getAttribute("ErrorMSG") %></td>
19         </tr>
20         <tr>
21             <td>密码：</td><td><input type="password" name="passwd"></td>
22         </tr>
23         <tr>
24             <td><input type="submit" value="登录"></td><td ><input type="reset" value="取消"></td>
25         </tr>
26
27     </table>
28     </form>
29     </div>
30 </body>
31 </html>

检查登录时输入的信息是否正确。

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@ page import="com.xt.stuSystem.util.DBUtil" %>
 4 <%@ page import="java.sql.*" %>
 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 6 <html>
 7 <head>
 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 9 <title>Insert title here</title>
10 </head>
11 <body>
12 <%    Connection conn=null;
13     PreparedStatement ps=null;
14     ResultSet rs=null;
15     DBUtil  dbu=DBUtil.getDBUtilInstance();
16
17     request.setCharacterEncoding("UTF-8");
18     String stuID=request.getParameter("stuID");
19     String passwd=request.getParameter("passwd");
20     String sql="select*from student where  stuID=? and passwd=password(?)";
21
22     try{
23         conn=dbu.getConnection();
24         ps=conn.prepareStatement(sql);
25         ps.setString(1, stuID);
26         ps.setString(2, passwd);
27         rs=ps.executeQuery();
28         if(rs.next()){
29             System.out.println("信息正确，进入首页！！");
30             request.setAttribute("rightEnter", stuID+" and "+passwd);
31             request.getRequestDispatcher("stuList.jsp").forward(request,response);
32         }else{
33
34             request.setAttribute("ErrorMSG","学号或者密码错误！！");
35             request.getRequestDispatcher("login.jsp").forward(request, response);
36         }
37
38     }catch(Exception e){
39         e.printStackTrace();
40         System.out.println("有错误"+e);
41     }finally{
42         dbu.closeResultSet(rs);
43         dbu.closeStatement(ps);
44         dbu.closeConnection(conn);
45     }
46 %>
47
48
49 </body>
50 </html>

学生管理系统有基础的增，删，改，查！！

添加学生信息的网页程序

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10
11     <div align="center">
12         <h1><font color="red"><em>添加学生页面</em></font></h1>
13         <hr>
14         <form action="doAdd.jsp" method="get">
15         <table>
16             <tr>
17                 <td>学号：</td><td><input type="text" name="stuID" ></td>
18             </tr>
19             <tr>
20                 <td>姓名：</td><td><input type="text" name="stuName" ></td>
21             </tr>
22             <tr>
23                 <td>性别：</td><td><input type="radio" name="gender" value="男">男</td>
24                 <td><input type="radio" name="gender" value="女">女</td>
25             </tr>
26             <tr>
27                 <td>年龄：</td><td><input type="text" name="age"></td>
28             </tr>
29             <tr>
30                 <td>分数：</td><td><input type="text" name="score"></td>
31             </tr>
32             <tr>
33                 <td>密码：</td><td><input type="password" name="passwd"></td>
34             </tr>
35             <tr>
36                 <td colspan="2"><input type="submit" value="提交"></td>
37                 <td colspan="2"><input type="reset" value="重置"></td>
38             </tr>
39
40         </table>
41             </form>
42     </div>
43
44
45 </body>
46 </html>

将添加的信息添加到数据库的操作！！

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@ page import="com.xt.stuSystem.util.DBUtil" %>
 4 <%@ page import="java.sql.*" %>
 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 6 <html>
 7 <head>
 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 9 <title>Insert title here</title>
10 </head>
11 <body>
12 <%
13     request.setCharacterEncoding("UTF-8");
14     String stuID=request.getParameter("stuID");
15     String stuName=request.getParameter("stuName");
16     String gender=request.getParameter("gender");
17     String age=request.getParameter("age");
18     String score=request.getParameter("score");
19     String passwd=request.getParameter("passwd");
20
21     System.out.println(stuID+"-----"+stuName+"------"+gender);
22     System.out.println(age+"-----"+score+"------"+passwd);
23
24     Connection conn=null;
25     PreparedStatement ps=null;
26     ResultSet rs=null;
27     DBUtil dbu=DBUtil.getDBUtilInstance();
28     String sql="insert into student(stuID,stuName,gender,age,score,passwd) values(?,?,?,?,?,password(?))";
29     try{
30         conn=dbu.getConnection();
31         ps=conn.prepareStatement(sql);
32         ps.setString(1,stuID);
33         ps.setString(2,stuName);
34         ps.setString(3,gender);
35         ps.setInt(4,Integer.parseInt(age.trim()));
36         ps.setDouble(5,Double.parseDouble(score.trim()));
37         ps.setString(6,passwd);
38         if(ps.executeUpdate()>0){
39             System.out.println("信息已经成功添加！");
40             request.getRequestDispatcher("index.jsp").forward(request,response);
41         }
42     }catch(Exception e){
43         e.printStackTrace();
44         e.getMessage();
45         e.getStackTrace();
46         System.out.println("Error:"+e);
47     }finally{
48         dbu.closeStatement(ps);
49         dbu.closeConnection(conn);
50     }
51
52 %>
53
54 </body>
55 </html>

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@ page import="com.xt.stuSystem.util.DBUtil" %>
 4 <%@ page import="java.sql.*" %>
 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 6 <html>
 7 <head>
 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 9 <title>Insert title here</title>
10 </head>
11 <body>
12 <%
13     request.setCharacterEncoding("UTF-8");
14     String stuID=request.getParameter("stuID");
15     String stuName=request.getParameter("stuName");
16     String gender=request.getParameter("gender");
17     String age=request.getParameter("age");
18     String score=request.getParameter("score");
19     String passwd=request.getParameter("passwd");
20
21     System.out.println(stuID+"-----"+stuName+"------"+gender);
22     System.out.println(age+"-----"+score+"------"+passwd);
23
24     Connection conn=null;
25     PreparedStatement ps=null;
26     ResultSet rs=null;
27     DBUtil dbu=DBUtil.getDBUtilInstance();
28     String sql="insert into student(stuID,stuName,gender,age,score,passwd) values(?,?,?,?,?,password(?))";
29     try{
30         conn=dbu.getConnection();
31         ps=conn.prepareStatement(sql);
32         ps.setString(1,stuID);
33         ps.setString(2,stuName);
34         ps.setString(3,gender);
35         ps.setInt(4,Integer.parseInt(age.trim()));
36         ps.setDouble(5,Double.parseDouble(score.trim()));
37         ps.setString(6,passwd);
38         if(ps.executeUpdate()>0){
39             System.out.println("信息已经成功添加！");
40             request.getRequestDispatcher("index.jsp").forward(request,response);
41         }
42     }catch(Exception e){
43         e.printStackTrace();
44         e.getMessage();
45         e.getStackTrace();
46         System.out.println("Error:"+e);
47     }finally{
48         dbu.closeStatement(ps);
49         dbu.closeConnection(conn);
50     }
51
52 %>
53
54 </body>
55 </html>

删除学生的操作！！！

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@ page import="com.xt.stuSystem.util.DBUtil" %>
 4 <%@ page import="java.sql.*" %>
 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 6 <html>
 7 <head>
 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 9 <title>Insert title here</title>
10 </head>
11 <body>
12 <%
13     String stuID=request.getParameter("stuID");
14     Connection conn=null;
15     Statement stat=null;
16     DBUtil dbu=DBUtil.getDBUtilInstance();
17     String sql="delete from student where stuID="+stuID;
18     System.out.print(sql);
19     try{
20         conn=dbu.getConnection();
21         stat=conn.createStatement();
22         if(stat.executeUpdate(sql)>0){
23             System.out.println("成功删除！！");
24             request.setAttribute("rightEnter", stuID+" !! ");
25             request.getRequestDispatcher("stuList.jsp").forward(request,response);
26         }
27
28     }catch(Exception e){
29         System.out.println("错误"+e);
30     }finally{
31         dbu.closeStatement(stat);
32         dbu.closeConnection(conn);
33     }
34
35 %>
36
37 </body>
38 </html>

改正学生的操作！！

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@page import="com.xt.stuSystem.util.DBUtil" %>
 4 <%@ page import="java.sql.*" %>
 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 6 <html>
 7 <head>
 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 9 <title>Insert title here</title>
10 </head>
11 <body>
12 <%
13     String stuID=request.getParameter("stuID");
14     Connection conn=null;
15     Statement stat=null;
16     ResultSet rs=null;
17     DBUtil dbu=DBUtil.getDBUtilInstance();
18     StringBuffer sql=new StringBuffer("select * from student where stuID=‘");
19     sql.append(stuID).append("‘");
20     System.out.println(sql);
21     try{
22         conn =dbu.getConnection();
23         stat=conn.createStatement();
24         rs=stat.executeQuery(sql.toString());
25
26
27 %>
28
29         <h1 align="center"><font color="red"><em>修改页面</em></font></h1>
30         <hr>
31         <form action="doUpdate.jsp" method="post">
32
33
34         <%while(rs.next()) {
35
36         %>
37
38         <table align="center">
39               <!-- <input  type="hidden" name="stuID1" value="<%=rs.getString(1) %>">
40                -->
41             <tr>
42                 <td>学号：</td><td><input type="text" name="stuID" value="<%=stuID%>" ></td>
43             </tr>
44             <tr>
45                 <td>姓名：</td><td><input type="text" name="stuName" value="<%=rs.getString(2)%>"></td>
46             </tr>
47             <tr>
48                 <td>性别：</td><td><input type="radio" <%="男".equals(rs.getString(3))?"checked":""%> value="男" name="gender" >男</td>
49                 <td><input type="radio" <%="女".equals(rs.getString(3))?"checked":""%> value="女"name="gender"  >女</td>
50             </tr>
51             <tr>
52                 <td>年龄：</td><td><input type="text" name="age" value="<%=rs.getInt(4)%>"></td>
53             </tr>
54             <tr>
55                 <td>分数：</td><td><input type="text" name="score" value="<%=rs.getDouble(5)%>"></td>
56             </tr>
57             <tr>
58                 <td>密码：</td><td><input type="password" name="passwd" value="<%=rs.getString(6)%>"></td>
59             </tr>
60             <tr>
61                 <td colspan="2"><input type="submit" value="提交"></td>
62                 <td colspan="2"><input type="reset" value="重置"></td>
63             </tr>
64         </table>
65         <%} %>
66     </form>
67 <%
68     }catch(Exception e){
69         e.printStackTrace();
70         System.out.print("错误"+e);
71     }finally{
72         dbu.closeResultSet(rs);
73         dbu.closeStatement(stat);
74         dbu.closeConnection(conn);
75     }
76
77 %>
78 </body>
79 </html>

将改正的信息添加到数据库！

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@ page import="com.xt.stuSystem.util.DBUtil" %>
 4 <%@ page import="java.sql.*" %>
 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 6 <html>
 7 <head>
 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 9 <title>Insert title here</title>
10 </head>
11 <body>
12 <%
13     Connection conn=null;
14     PreparedStatement ps=null;
15     DBUtil dbu=DBUtil.getDBUtilInstance();
16     request.setCharacterEncoding("UTF-8");
17     String stuID=request.getParameter("stuID");
18     System.out.println(stuID);
19     String stuName=request.getParameter("stuName");
20     String gender=request.getParameter("gender");
21     String age=request.getParameter("age");
22     String score=request.getParameter("score");
23     String passwd=request.getParameter("passwd");
24     try{
25     System.out.println(stuID+"---"+stuName+"---"+gender);
26     String sql="update student set stuName=?,gender=?,age=?,score=?,passwd=password(?) where stuID=‘"+stuID+"‘";
27     System.out.print(sql);
28
29
30         conn=dbu.getConnection();
31         ps=conn.prepareStatement(sql);
32         ps.setString(1,stuName);
33         ps.setString(2,gender);
34         ps.setInt(3, Integer.parseInt(age));
35         ps.setDouble(4,Double.parseDouble(score));
36         ps.setString(5,passwd);
37         if(ps.executeUpdate()>0){
38             System.out.print("信息已经成功改正！！");
39             request.getRequestDispatcher("stuList.jsp").forward(request,response);
40
41         }
42
43     }catch(Exception e){
44         e.printStackTrace();
45     }finally{
46         dbu.closeStatement(ps);
47         dbu.closeConnection(conn);
48     }
49 %>
50
51 </body>
52 </html>

显示学生信息的操作！

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@ page import="com.xt.stuSystem.util.DBUtil" %>
 4 <%@ page import="java.sql.*" %>
 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 6 <html>
 7 <head>
 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 9 <title>Insert title here</title>
10 </head>
11 <body>
12 <%    if(request.getAttribute("rightEnter")==null){
13     request.getRequestDispatcher("login.jsp").forward(request, response);
14 }
15
16
17     request.setCharacterEncoding("UTF-8");
18     String stuID1=null;
19     String stuName=null;
20     stuID1=request.getParameter("stuID1");
21     stuName=request.getParameter("stuName");
22     Connection conn=null;
23     Statement stat=null;
24     ResultSet rs=null;
25     DBUtil dbu=DBUtil.getDBUtilInstance();
26     StringBuffer sql=new StringBuffer("select * from student where 1=1 ");
27     if(stuID1!=null&&!"".equals(stuID1)){
28         sql.append(" and stuID=").append(stuID1.trim());
29     }
30     if(stuName!=null&&!"".equals(stuName)){
31         sql.append(" and stuName  like ‘%").append(stuName.trim()).append("%‘");
32     }
33     System.out.println(sql);
34     try{
35         conn=dbu.getConnection();
36         stat=conn.createStatement();
37         rs=stat.executeQuery(sql.toString());
38
39 %>
40 <div align="center">
41 <form action=""  method="post">
42     <table>
43         <tr>
44         <td>学号：</td><td><input type="text" name="stuID1" value="<%=stuID1==null?"":stuID1%>"></td>
45         <td>姓名：</td><td><input type="text" name="stuName" value="<%=stuName==null?"":stuName%>"></td>
46         </tr>
47         <tr>
48         <td colspan="2" align="center"><input type="submit" value="查询"></td>
49         <td  colspan="2" align="center"><input type="reset" value="取消"></td>
50
51         </tr>
52     </table>
53     <hr>
54 </form>
55
56
57
58     <table border="1px" bordercolor="red" cellpadding="0" cellspacing="0" width="800px" >
59         <tr>
60         <th>学号</th><th>姓名</th><th>性别</th><th>年龄</th><th>成绩</th><th>密码</th><th>操作</th>
61         </tr>
62             <%
63             while(rs.next()){
64             %>
65         <tr>
66         <td><%=rs.getString(1) %></td><td><%=rs.getString(2) %></td><td><%=rs.getString(3) %></td>
67         <td><%=rs.getInt(4) %></td><td><%=rs.getDouble(5) %></td><td><%=rs.getString(6) %></td>
68         <td><a href="delete.jsp?stuID=<%=rs.getString(1)%>">删除</a> <a href="update.jsp?stuID=<%=rs.getString(1)%>">修改</a></td>
69         </tr>
70         <%
71         }
72         %>
73     </table>
74     </div>
75
76 </body>
77 <%
78
79     }catch(Exception e){
80         e.printStackTrace();
81         System.out.println("有错误"+e);
82     }finally{
83         dbu.closeResultSet(rs);
84         dbu.closeStatement(stat);
85         dbu.closeConnection(conn);
86     }
87 %>
88 </html>
时间： 2024-12-23 08:46:03

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