struts2第一个实例
??? struts2框架第一个实例
?? (1)新建web项目，在项目中添加struts2的核心类库。
?????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??
??? commons-fileupload-1.2.1
? 其中如果缺少commens-fileupload-1.2.1这个jar包，tomcat在启动时就会报错Exception starting filter struts2
????? Unable to load configuration.
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? (2)web.xml中配置
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<?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</display-name> <filter> <filter-name>**</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name>**</filter-name> <url-pattern>*.action</url-pattern> </filter-mapping> </web-app>
?其中<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>该类是在 struts2-core-2.1.6.jar中
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(3)新建login.jsp
<%@ 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>login.jsp</title></head><body> <form action="login.action" method="post"> userName:<input type="text" name="userName"><br> password:<input type="password" name="password"><br> <input type="submit" value="submit"> </form></body></html>
?(4)新建loginSuccess.jsp
<%@ 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>loginSuccess</title></head><body> userName:${requestScope.userName}<br> password:${requestScope.password}</body></html>?
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??? (5)新建Action
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public class LoginAction { 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{return "success";} }struts2中的action与struts1中的action完全不同，是一个普通的pojo。
由属性，属性的set,get方法，及execute()方法组成。而execute() 方法的返回值和名称是固定的。?
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?? (6)在src下新建struts.xml
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<?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="login" extends="struts-default"> <action name="login" >/loginSuccess.jsp</result> </action> </package> </struts>
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