ajax、struts问题 - Java / Web 开发

求段jsp脚本用ajax跳到action中 查询完以后 在从action返回ajax详细代码 就是要求页面不刷新

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页面定义一个div，假设id为test。回调函数里面直接 document.getElementById('test').innerHTML=responsetext;
struts2的后面的：

package com.vmkid.iplug.busserver.action;

import java.io.PrintWriter;
import java.util.ArrayList;

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

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

import com.opensymphony.xwork2.ActionSupport;
import com.vmkid.iplug.busserver.common.OptionBean;
import com.vmkid.iplug.busserver.dao.OptionBeanDAO;

public class AjaxGetTypeAction extends ActionSupport implements
ServletRequestAware, ServletResponseAware {

private static final long serialVersionUID = -7935648568639117966L;

private HttpServletRequest request;

private HttpServletResponse response;

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

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

public String execute() {
String pTypeId = request.getParameter("pTypeId");
ArrayList<OptionBean> lst;
try {
lst = OptionBeanDAO.getTypeLst(pTypeId);