jQuery Struts 整合

Jquery怎么将Action处理好之后的结果得到
public String getUsersByGid() throws IOException {

HttpServletResponse response = ServletActionContext.getResponse();

PrintWriter out = response.getWriter();
 
JSONArray jsonArray = new JSONArray();

UserDao userDao = new UserDaoImpl();
users = userDao.getByGid(id);

for(int i=0;i<users.size();i++) {
jsonArray.add(users.get(i));
}

System.out.println(jsonArray.toString());

out.print(jsonArray);
return "getUsersByGid";
}

action处理数据之后要把jsonArray传给页面

$(document).ready(function(){ 
$('select.group').change(function() {
var id = document.getElementById("id").value;
alert(id);
$.ajax({
dataType : "json",  
type:"post",  
url:"testAjaxAction!getUsersByGid", 
data:"id="+id,
timeout:2000,
error:function() {
alert(");
},
success : function(json) {
alert(json);
}
});
});
});


回调函数如何得到jsonArray的值。。。。。。。。。。。！！！！！！！

CSS code

json[0]取值