jqGrid成功调用restful服务但无法显示jqGrid ui

Question

这是RESTful数据格式

{"user":[
           {"id":"aupres","passwd":"aaa","age":45,"name":"father"},
           {"id":"hwa5383","passwd":"bbb","age":40,"name":"mother"},
           {"id":"julian","passwd":"ccc","age":15,"name":"son"}

]}

我的jqGrid客户端成功调用上述数据。下图显示了结果：

但是这段代码无法显示对jqGrid的响应。这是我的客户端代码

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="EUC-KR">
    <title>jqGrid Test</title>
    <link rel="stylesheet" type="text/css" media="screen" href="jquery-ui.css"/>
    <link rel="stylesheet" type="text/css" media="screen" href="ui.jqgrid.css"/>
    <script type="text/javascript" src="jquery-2.2.0.min.js"></script>
    <script type="text/javascript" src="jquery.jqGrid.min.js"></script>
    </head>
    <body>
    <table id="grid"></table>
    <div id="pager"></div>
    <script type="text/javascript">
    $(document).ready(function(){

       $Grid = $("#grid");
       $Grid.jqGrid({

          mtype: "get",
          url: "/JQueryJsonWeb/rest/services/getJson/aupres",
          contentType: "text/json; charset=utf-8",
          dataType: "json",

          jsonReader : {
             root : "user"
          },
          colNames : [
             'id',
             'passwd',
             'age',
             'name'
          ],
          colModel : [
             { name : 'id',        width:40,  align:'center'},
             { name : 'passwd',    width:80,  align:'left'  },
             { name : 'age',       width:80,  align:'left'  },
             { name : 'name',      width:80,  align:'right' }
          ],
          pager : '#pager',
          rowNum : '10',

          loadComplete : onloadComplete,
          loadError : onloadError,
          gridComplete : ongridComplete
       });  

       function onloadComplete(jsonData, status) {
          console.log(jsonData) **// This method shows the above image.**
       }

       function onloadError(status) {
          console.log(status)
       }

       function ongridComplete() {
          console.log("fiished!!!");
       }
    });
    </script>
    </body>
    </html>