struts2笔记06-ServletXxxAware接口

1、ServletXxxAware接口

ActionContext和XxxAware接口对应，属于解耦的设计，但功能单一，我们能够获取到的只是struts2给我们返回的map。ServletActionContext和ServletXxxAware接口对应，属于耦合的设计，但功能强大，能够直接获取servlet相关的对象。

ServletXxxAware同样是struts2依赖注入给Action类的设计，使用起来比ServletActionContext方便，比如多个action的方法，就不需要每次都从context获取了。

ServletContextAware,ServletRequestAware, ServletResponseAware

2、测试代码

package com.test.action;

import javax.servlet.ServletContext;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.struts2.interceptor.ServletRequestAware;

import org.apache.struts2.interceptor.ServletResponseAware;

import org.apache.struts2.util.ServletContextAware;

public class TestServletAwareAction implements ServletContextAware,

		ServletRequestAware, ServletResponseAware {

	public String execute() {

		context.setAttribute("applicationKey", "applicationValue");

		HttpSession session = request.getSession();

		session.setAttribute("sessionKey", "sessionValue");

		request.setAttribute("requestKey", "requestValue");

		return "success";

	}

	// 注入的HttpServletResponse

	private HttpServletResponse response;

	@Override

	public void setServletResponse(HttpServletResponse response) {

		this.response = response;

	}

	// 注入的HttpServletRequest

	private HttpServletRequest request;

	@Override

	public void setServletRequest(HttpServletRequest request) {

		this.request = request;

	}

	// 注入的ServletContext

	private ServletContext context;

	@Override

	public void setServletContext(ServletContext context) {

		this.context = context;

	}

}