创建一个简单的模拟登陆功能的网页，没有用数据库技术，只是简单的学习jsp语法
首先创建一个登陆页面
<%@ page language = "java" import="java.util.*" pageEncoding="utf-8" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘index.jsp‘ starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action = "judge.jsp">
name<input type = "text" name = "name">
password<input type = "password" name = "password">
<input type = "submit" value = "提交">
</form>
</body>
</html>
然后创建一个判断用户名和密码的jsp文件，这里默认用cheng做用户名，song做密码
<%@ page language = "java" pageEncoding="utf-8" %>
<html>
<head>
<title>forward 动作</title>
</head>
<body>
<jsp:useBean id="tb" scope = "request" class ="bean.testbean"></jsp:useBean>
<jsp:setProperty property="*" name="tb"/>
<%-- <%@include file = "jisuan.jsp" %> --%>
<%
String name = tb.getName();
String password = tb.getPassword();
if(name.equals("cheng")&&password.equals("song")){
%>
<jsp:forward page="success.jsp"></jsp:forward>
<%
}else{
%>
<jsp:forward page="fail.jsp"></jsp:forward>
<%
}
%>
</body>
</html>
在判断之后，根据判断结果进入两个网页，一个是成功登陆，一个是登录失败
<%@ page language = "java" pageEncoding="utf-8" %>
<html>
<head>
<title>登陆成功</title>
</head>
<body>
<jsp:useBean id="tb" scope = "request" class = "bean.testbean"></jsp:useBean>
登陆成功
<hr>
你的用户名是:<jsp:getProperty property="name" name="tb"/></br>
你输入的密码是:<jsp:getProperty property="password" name="tb"/>
</body>
</html>
<%@ page language = "java" pageEncoding="utf-8" %>
<html>
<head>
<title>登录失败</title>
</head>
<body>
<jsp:useBean id="tb" scope = "request" class = "bean.testbean"></jsp:useBean>
登录失败
你输入的用户名<jsp:getProperty property="name" name="tb"/>错误</br>
你输入的密码：<jsp:getProperty property="password" name="tb"/>
</body>
</html>
其中的Javabean如下
package bean;
public class testbean {
public String name ;
public String password;
public testbean(){}/*该处的public开始时掉了，导致后来一直报错，调试半天，切记切记，当程序说找不到bean文件时，一定要看看是不是忘了public*/
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
时间： 2024-10-16 15:48:48