標籤：des style class blog code java
近期學習web開發時，就遇到這個令人頭疼的問題。
百度Google了N遍，最終在部落格http://blog.csdn.net/liu578182160/article/details/17266879中找到了問題的根源。
開發環境：win7 32位旗艦版，jdk1.7_45，jre7，eclipse4.3.1 JavaEE版，tomcat 7.0.42，struts2.3.16.3
問題出如今web.xml配置
原web.xml：
<?xml version="1.0" encoding="UTF-8"?><web-app id="struts2Demo" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <filter> <filter-name>struts2</filter-name> <filter-class> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter </filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping></web-app>
<?xml version="1.0" encoding="UTF-8"?> <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <display-name></display-name> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>login.jsp</welcome-file> </welcome-file-list> </web-app>
關鍵的差別就在於web-app的version
(似乎不關這版本號碼問題，剛試了2.4的web-app，能夠執行成功。)
可能這不是問題的關鍵，項目改動的地方還有
原login.jsp：
<%@ 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 '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">--> </head> <body> <form action="login.action" method="post"><!-- login就是struts.xml裡的action的name --> 使用者名稱<input type="text" name="username" /> <!-- username相應LoginAction的username通過set方法傳入 --> 密碼： <input type="password" name="password" /> <!-- password相應LoginAction的password通過set方法傳入 --> <input type="submit" name="Submit" value="Submit"/> </form> </body></html>
改動後的login.jsp：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@taglib prefix="s" uri="/struts-tags" %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title><s:text name="loginPage"/></title></head><body><s:form action="login"><s:textfield name="username" key="user"/><s:textfield name="password" key="pass"/><s:submit key="login" value="Submit"/></s:form></body></html>
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
