首先struts2有六个必须的包
struts2必须的包
commons-logging-1.0.4.jar
freemarker-2.3.13.jar
ognl-2.6.11.jar
struts2-core-2.1.6.jar
xwork-2.1.2.jar
commons-fileupload-1.2.1.jar(上传文件的，不上传文件可以不要)
struts2和struts1不同的是，采用的是filter,而不是servlet
web.xml文件
<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>
struts2的参数收集不像struts1那样依靠ActionForm,也不用extends Action
不依赖struts2的任何类
package com.langhua.action;import com.opensymphony.xwork2.ActionSupport;public class LoginAction extends ActionSupport{ private String username; private String password; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String execute() throws Exception{ if("langhua".equals(this.getUsername().trim()) && "123456".equals(this.getPassword().trim())){ return "success"; }else{ this.addFieldError("username","username or password is error"); return "Error"; } } @Override public void validate() { if(null == this.getUsername() || "".equals(this.getUsername().trim())){ this.addFieldError("username", "username not null"); } if(null == this.getPassword() || "".equals(this.getPassword().trim())){ this.addFieldError("password", "password not null"); } }}
struts2的配置文件在Eclipse里面要放到src目录下，这样部署到容器里面的时候，就会放到WEB-INF\classes目录下面
<?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> <!-- struts默认的struts-default --> <package name="struts2" extends="struts-default"> <!-- 对应login.*的请求，就到class="com.langhua.action.LoginAction"处理 --> <action name="login" class="com.langhua.action.LoginAction"> <!-- name就是execute()里面return的返回值，再转到相应的页面 input是默认的错误处理 this.addFieldError--> <result name="success">/langhua/result.jsp</result><result name="input">/login2.jsp</result> <result name="Error">/login2.jsp</result> </action> </package></struts>
jsp页面
<%@ taglib prefix="s" uri="/struts-tags" %><s:form action="login"> <s:textfield name="username" label="username"></s:textfield> <s:password name="password" label="password"></s:password> <s:submit label="submit"></s:submit> </s:form>
