Struts2入门配置
工具 tomcat eclipse
jar:
struts2-core-2.1.8.1.jar
commons-fileupload-1.2.1.jar
commons-io-1.3.2.jar
freemarker-2.3.15.jar
ognl-2.7.3.jar
xwork-core-2.1.6.jar
（注意，commons-fileupload-1.2.1.jar 和 commons-io-1.3.2.jar 如果不添加，则会报unable to load configuration .struts-default.xml:46:178错误 ）
web.xml中添加filterDispather，
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" 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>
struts2tutorial</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>
在src根目录下创建struts2.xml，内容如下：
<?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="tutorial" extends="struts-default">
<action name="HelloWorld" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>hello world</title>
</head>
<body>
<h2>
<s:property value="message" />
</h2>
</body>
</html>
创建action类，
package org.xmh.demo;
import java.util.Date;
import com.opensymphony.xwork2.ActionSupport;
public class HelloWorld extends ActionSupport {
private String message;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String execute(){
message = "hello world "+ new Date();
return SUCCESS;
}
}
，启动tomcat ，打开http://localhost:8080/projectname/HelloWorld.action即可。
