easyui datagrid 加载两次请求，触发两次ajax 请求 问题

<table id="gridview" class="easyui-datagrid"></table>

$(function(){
  $("#gridview").datagrid({
   url:"getData.do",
   title:"列表",
   singleSelect:false,
   pagination:true,
   toolbar:"#toolbar",

   method:"get",
    columns:[[
       {field:"ck",checkbox:true },
       {field:"id",title:"ID",width:20,sortable:true },
       {field:"kindName",title:"名称",width:100,resizable:true,sortable:true},
       {field:"createDate",title:"创建日期",width:80,resizable:true,sortable:true}
    ]]
  });  
 })

初始化一个表格 

$(function(){
　　$(‘.SFC7450_main_table1‘).datagrid({
		url:‘table.json‘,//加载本地json
		rownumbers:true,//序号是否显示
		pagination:true,	//是否添加页签
		pagePosition:‘bottom‘,	//页面的位置
		method:‘get‘,//获取类型
		singleSelect:true,//是否单选
		fitColumns:false,//单元格是否自适应填满表格宽度
		columns:[SFC7450_table[0]]
	});

});

使用下面方式为表格赋值 

$(‘.SFC7450_main_table1‘).datagrid({
		url:‘/sfc/a.do‘,//加载本地json
		rownumbers:true,//序号是否显示
		pagination:true,	//是否添加页签
		pagePosition:‘bottom‘,	//页面的位置
		method:‘get‘,//获取类型
		singleSelect:true,//是否单选
		fitColumns:false,//单元格是否自适应填满表格宽度
		columns:[SFC7450_table[0]]
	});

这时候会出现一个奇怪的现象： js调试观察network 会看到 请求了 sfc/a.do .. 请求完成后又请求了一次 table.json ... 解决：可以在初始化的时候不要请求url，而是使用data 赋一个空数组 （我们为什么要初始化一个空的表格，是为了页面在初始的时候展现好看）
//空白JOSN 5行
var KongJson5=[
{"":"","":"","":"","":"","":"",
"":"","":"","":"","":"","":""},

{"":"","":"","":"","":"","":"",
"":"","":"","":"","":"","":""},

{"":"","":"","":"","":"","":"",
"":"","":"","":"","":"","":""},
{"":"","":"","":"","":"","":"",
"":"","":"","":"","":"","":""},

{"":"","":"","":"","":"","":"",
"":"","":"","":"","":"","":""}
]

改成下面即可 $(‘.SFC7450_main_table1‘).datagrid({

		data:KongJson5,//加载本地json
		rownumbers:true,//序号是否显示
		pagination:true,	//是否添加页签
		pagePosition:‘bottom‘,	//页面的位置
		method:‘get‘,//获取类型
		singleSelect:true,//是否单选
		fitColumns:false,//单元格是否自适应填满表格宽度
		columns:[SFC7450_table[0]]
	});