Struts2学习笔记（十四）Annotation实现Struts2的配置

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1、用Annotation注释的方式实现Struts2的配置，首先要在lib目录下引入struts2-convention-plugin-2.3.4.jar包。

如下图所示，

我们发现annotation包下所对应的类与struts.xml文件中所要配置的内容几乎完全一致。

2、我们对LoginAction进行Annotation，免struts.xml配置实例。要求正确输出登录信息，错误返回登录页面。

Struts2使用注解开发需要遵循一些规范：(我的开发包不是以.action结尾的就老出错)

1）Action要必须继承ActionSupport父类；

2）Action所在的包名必须以 .action 结尾；

<1>login.jsp

<%@ page language="java" 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"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><form action="login.action" method="post">username:<input type="text" name="username">password:<input type="text" name="password"><input type="submit" value="submit"></form></body></html>

<2>编写action类

package cn.sict.action;import org.apache.struts2.convention.annotation.Action;import org.apache.struts2.convention.annotation.ParentPackage;import org.apache.struts2.convention.annotation.Result;import com.opensymphony.xwork2.ActionSupport;@ParentPackage("struts-default")@Action(value = "login", results = {@Result(name = "success", location = "/result.jsp"),@Result(name = "input", location = "/login.jsp", type = "redirect") })public class LoginAction extends ActionSupport {private static final long serialVersionUID = 1L;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;}@Overridepublic String execute() throws Exception {// TODO Auto-generated method stubif ("aaa".equals(username) && "aaa".equals(password))return SUCCESS;elsereturn INPUT;}}

<3>result.jsp

<%@ page language="java" 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"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>username:${requestScope.username}<br>password:${requestScope.password}<br></body></html>

参考资料：http://blog.csdn.net/liujiahan629629/article/details/22696589

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