【JSP】简单登陆界面

学生登陆查询系统

     1 程序的主要功能及特点

实现一个登录界面的基本功能，具体要求：

  • 登录界面login.jsp含有表单，用户能够输入用户名和密码，并提交表单给verify.jsp。
  • Verify.jsp读取表单信息，并验证接收的用户名和密码是否与verify.jsp内置的相应变量值一致。
  • 如果一致，则转向页面success.jsp，显示"成功登录"并可以手动选择要查询的系统。
  • 如果不一致，则转向页面failure.jsp，显示"登录失败"并手动返回。
  • 本系统默认：用户名14347119密码wuxing为正确。

    2 程序部署及运行截图和相应说明（手工部署）

    部署

    • 成功登陆后可以选择登陆某一查询系统，见下图
    • 不成功登陆提示错误并返回，见下图

    SUCCESS LOGIN

    FAILURE LOGIN

     

     

    3 程序源代码

    login.jsp 

     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 <title>loginPage</title>
 7 </head>
 8 <body bgcolor=AliceBlue >
 9 <form name="loginForm" method="post" action="verify.jsp">
10 <center>
11 <font size=6>学生微教务</font>
12 </center>
13 <center>
14 <table>
15 <tr>
16 <td height="40" weight="100">UserName<input type="text" name="userName" id="userName"></td>
17 </tr>
18 <tr>
19 <td height="40" weight="100">Password<input type="password" name="password" id="password"></td>
20 </tr>
21 <tr>
22 <td><input type="submit" value="login" style="background-color:white"> <input type="reset" value="reset" style="background-color:yellow"></td> 
23 </tr>
24 </table>
25 </center>
26 </form>
27 </body>
28 </html>

     

    verify.jsp

     

     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 <title>Authentication</title>
 7 </head>
 8 <body>
 9 <% 
10 request.setCharacterEncoding("UTF-8");
11 String name = request.getParameter("userName");
12 String password = request.getParameter("password");
13 if(name.equals("14347119")&& password.equals("wuxing")) {
14 %>
15 <jsp:forward page="success.jsp">
16 <jsp:param name="userName" value="<%=name%>"/></jsp:forward>
17 <%}
18 else{
19 %>
20 <jsp:forward page="failure.jsp"></jsp:forward>
21 <%} 
22 %>
23 </body>
24 </html>

     

    success.jsp

     

     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 <title>Login Success</title>
 7 </head>
 8 <body bgcolor=AliceBlue>
 9 <form name="SUCCESS" method="post" action="JMP.jsp">
10 <center>
11 <%request.setCharacterEncoding("UTF-8");
12 String name = request.getParameter("userName");
13 out.println("Welcome:"+name);%><BR>
14 </center>
15 <center>
16 <BR><font size="6">Score Query System</font><BR>
17 <BR><font size="4">Please select one item to check</font>
18 <Select name="grade" >
19               <Option selected value="http://wjw.sysu.edu.cn">Academic performance</option>
20               <Option value="http://cet.99sushe.com">CET-4 & CET-6</option>
21               <Option value="http://chaxun.neea.edu.cn/examcenter/query.cn?op=doQueryCond&pram=results&sid=300"> NCRE</option>
22          </Select> 
23 <BR><BR> <Input type="submit" value="submit" name="submit">
24 </center>
25 </body>
26 </html>

     

    failure.jsp 

     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>Login Failure</title>
 8 </head>
 9 <body bgcolor="Aliceblue">
10 <center><font size="4">
11 Incorrect username or password! Please return and try again. 
12 <BR><A href="login.jsp" >return
13 </font>
14 </center>
15 </body>
16 </html>

     

    JMP.JSP（用于跳转网站页面）

     

     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>JMP</title>
 8 </head>
 9 <body>
10  <% String s=request.getParameter("grade"); 
11  response.sendRedirect( s);  %>     
12 </body>
13 </html>

     

     

     

posted @ 2016-03-30 20:12  隅子酱  阅读(2620)  评论(0)  编辑  收藏  举报