struts2入门

环境搭建

1.1 jar
1.2 web.xml
1.3 struts.xml
struts.xml(核心配置文件)

添加依赖：（在pom.xml中）

<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.5.13</version>
</dependency>

开发
Action
不需要指定父类(ActionSupport)
业务方法的定义
public String xxx();//execute
Action是多例模式(注：在spring中的配置中一定要注意)
Action用来接收参数

参数赋值
Action中定义属性，并提供get/set方法
userName, getUserName/setUserName

Defultaction.java

package com.web;

import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;

import com.opensymphony.xwork2.ModelDriven;

/**
 * 1、动态方法调用 
 * 2、struts中的传参
 * 	2.1 set传参
 * 	2.2 参数名.属性名传参
 *  2.3实现modeldriven接口
 * 3、struts与tomcat的交互
 * 将后台的值传到前台去
 * request传值
 * 
 * 值栈传值(get方法传值)
 * @author xyls
 *
 */
public class DefultAction implements ModelDriven<User>, ServletRequestAware,ServletResponseAware{

	private HttpServletRequest request;
	private HttpServletResponse response;
	private User user1=new User();
	private User user2;
	private String sex;
	private String uname;
	
	
	public User getUser2() {
		return user2;
	}

	public void setUser2(User user2) {
		this.user2 = user2;
	}

	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	public String add() {
		System.out.println("。。。");
		return null;
	}

	public String del() {
		System.out.println("user1:"+user1);
		System.out.println("user2:"+user2);
		System.out.println("sex:"+sex);
		HttpServletRequest request=ServletActionContext.getRequest();
		this.request.setAttribute("rs", user1);
		return "success";
	}

	public String edit() {
		System.out.println("。。。");
		return null;
	}

	public String list() {
		System.out.println("。。。");
		return null;
	}

	@Override
	public User getModel() {
		return user1;
	}

	@Override
	public void setServletResponse(HttpServletResponse response) {
		this.response=response;
	}

	@Override
	public void setServletRequest(HttpServletRequest request) {
		this.request=request;
	}

}

ModelDriven
返回实体，不能为null，不需要提供get/set方法

ModelDriven返回实体和Action中属性重名，ModelDriven中优先级更高

与J2EE容器交互
非注入
耦合
ServletActionContext

解耦(建立使用解耦模式)
ActionContext

运行结果（控制台）：

demo.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>
<h2>struts传参的3种方式</h2>
<a href="${pageContext.request.contextPath}/sy/defult_del.action?uid=001&&uname=zs">测试model driver</a>
<a href="${pageContext.request.contextPath}/sy/defult_del.action?sex=nan">测试set传参</a>
<a href="${pageContext.request.contextPath}/sy/defult_del.action?user2.uid=002&&user2.uname=ls">测试参数名.属性名传参</a>
</body>
</html>