ServletActionContext.getRequest()报空指针

代码如下：
package com.web;

import java.util.List;

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

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

import com.bean.Girls;
import com.biz.GirlsBiz;

public class Controller {
private GirlsBiz girlsBiz;
//设值注入
public void setGirlsBiz(GirlsBiz girlsBiz) {
this.girlsBiz = girlsBiz;
}

public String sayhello(){
    List<Girls> list=girlsBiz.findAllGirls();
    for (Girls girls : list) {
        System.out.println("name: "+girls.getName());
    }
    HttpServletRequest request=ServletActionContext.getRequest();
    request.setAttribute("glist", list);

    return "hello";
}

}
用junit测试时可以遍历出集合list的，可同时报空指针异常在HttpServletRequest request=ServletActionContext.getRequest();这句，求大神指点啦，找了一天都没找出答案

HttpServletRequest request=ServletActionContext.getRequest();
改成
public static HttpServletRequest getHttpServletRequest(){
HttpServletRequest request=ServletActionContext.getRequest();
return request;
}
不要在服务器启动的时候初始化到

你用了Struts框架，里面的response是被action包装的呀！！！要想获得response应该是 ActionContext.getContext().getResponse()呀

空指针 用debug 调试呗