HTTP Status 404 - /HelloWorld/HelloWorld.action
在eclipse中创建一个Dynamic Web Project。具体内容如下：
HelloWorld.java
- Java code
public class HelloWorld{ private String username; public void setUsername(String username) { this.username = username; } public String getUsername() { return username; } public String execute() { if(getUsername().equals("")) { System.out.println("no String input!"); return "error"; } else { System.out.println(getUsername()); return "success"; } }}web.xml
- XML code
<?xml version="1.0" encoding="UTF-8"?><web-app id="WebApp_9" 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"> <display-name>Struts Blank</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>index.jsp</welcome-file> </welcome-file-list></web-app>
struts.xml
- XML code
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"><struts> <package name="default" namespace="/" extends="struts-default"> <action name="index" class="HelloWorld"> <result name="success">success.jsp</result> <result name="error">error.jsp</result> </action> </package></struts>
index.jsp
- HTML code
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%><!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=ISO-8859-1"><title>Insert title here</title></head><body>Hello World!<form method="post" action="HelloWorld.action"> <input type="text" name="username" /> <input type="submit" name="submit" /></form></body></html>
运行后，出现下面的错误：
HTTP Status 404 - /HelloWorld/HelloWorld.action
--------------------------------------------
type Status report
message /HelloWorld/HelloWorld.action
description The requested resource (/HelloWorld/HelloWorld.action) is not available.
--------------------------------------------
Apache Tomcat/7.0.21
不知是何故？？
[解决办法]
<form method="post" action="index.action">