访问Servlet的API的方式三：接口注入的方式

package com.youcheng.struts2.demo1;

import java.util.Arrays;
import java.util.Map;

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

import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;
import org.apache.struts2.util.ServletContextAware;

import com.opensymphony.xwork2.ActionSupport;
/**
 * 访问Servlet的API的方式三：接口注入的方式
 * @author youcheng
 *
 */
public class RequestDemo3 extends ActionSupport implements ServletRequestAware,ServletContextAware,
 ServletResponseAware {

   private HttpServletRequest request;
   private ServletContext context;
   private HttpServletResponse response;

   public RequestDemo3() {
      super();
 System.out.println("RequestDemo3被创建了...");
 }

   @Override
 public String execute() throws Exception {
      // 一、接收参数
      // 通过接口注入的方式获得request对象。
 Map<String, String[]> map = request.getParameterMap();
      for (String key : map.keySet()) {
         String[] values = map.get(key);
 System.out.println(key+"    "+Arrays.toString(values));
 }
      // 二、向域对象中保存数据
      // 向request域中保存数据
 request.setAttribute("reqName", "reqValue");
 // 向session中保存数据:
 request.getSession().setAttribute("sessName", "sessValue");
 // 向application中保存数据:
 context.setAttribute("appName", "appValue");
 //通过response获取当前状态码
 int status = response.getStatus();
 System.out.println(status);
      
      return super.execute();
 }

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

   @Override
 public void setServletContext(ServletContext context) {
      this.context = context;
 }

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