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 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，可同时报空指针在HttpServletRequest request=ServletActionContext.getRequest();这句，求大神指点~