ajax與jquery批量更新，異步請求

js：

<script type="text/javascript">
$("a[id=submit]").click(function(){
    var obj = {};
    $("tr",navTab.getCurrentPanel()).each(function(){

        var id = $("input[name=id]",this).val();
        var type = $("select[name=expiryStatus]",this).val();
        obj[id]=type;

    });
    var date={list:JSON.stringify(obj)};
    var url="serviceFailureEquipmentsAction_updateType.action";
    $.post(url,date,function(date){
        DWZ.ajaxDone(date);  
        if (date.statusCode == DWZ.statusCode.ok){  
            alertMsg.correct(date.message);
        }else{
            alertMsg.error(date.message);
        }
    },"json"); 

});
</script>

action：

public String updateType(){
        String list=ServletActionContext.getRequest().getParameter("list");
        //JSONArray json = JSONArray.fromObject(list);
        JSONObject object=JSONObject.fromObject(list);
        Set<String> keys=object.keySet();{
            for(String key:keys){
                String value=object.getString(key);
                serviceFailureEquipmentsService.update(Integer.parseInt(key), Integer.parseInt(value));
            }
        }
        getobject("200", "質保修改成功", null, null, "sucess", null);
        return null;
    }