JAVA EE JSP_EL
http://www.javapassion.com/j2ee/
http://hi.baidu.com/livinggame/blog/item/0118eceffebbd437adafd50d.html
<%@ page isELIgnored="true"%>
表示是否禁用EL语言,TRUE表示禁止.FALSE表示不禁止.JSP2.0中默认的启用EL语言.
登陆用户名和密码后,若密码错误则保留用户名.
login.java
package com.lindows.action;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class login extends HttpServlet {
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//String name = request.getAttribute("uname").toString();
String nameString = (String)request.getParameter("uname");
System.out.println(nameString);
//request.setAttribute("name", name);
}
}
web.xml
<servlet> <servlet-name>login</servlet-name> <servlet-class>com.lindows.action.login</servlet-class> </servlet> <servlet-mapping> <servlet-name>login</servlet-name> <url-pattern>/login</url-pattern> </servlet-mapping>
login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page isELIgnored="false" %>
<%
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 'login.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">
-->
<script>
function funsub()
{
alert(document.getElementById("uname").value);
document.fm.action="<%=request.getContextPath()%>/login";
document.fm.submit();
}
</script>
</head>
<body>
<form method=get action="/register.jsp">
username:<input type="text" value="username">
</form>
<form name="fm" method="post">
<input type="text" name="uname" >
<input type="button" value="ok" onclick="funsub()">
</form>
</body>
</html>
end