1、新建Web项目，项目的文件结构如下：
2、ChangeDataGrid.html源码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Aligning Columns in DataGrid - jQuery EasyUI Demo</title>
<link rel="stylesheet" type="text/css" href="../style/easyui.css">
<link rel="stylesheet" type="text/css" href="../style/icon.css">
<link rel="stylesheet" type="text/css" href="../style/demo.css">
<script type="text/javascript" src="../../jquery.min.js"></script>
<script type="text/javascript" src="../script/jquery.easyui.min.js"></script>
</head>
<body>
<h2>可以折叠的表格</h2>
<div class="demo-info">
<div class="demo-tip icon-tip"></div>
<div>折叠表格</div>
</div>
<div style="margin:10px 0;"></div>
<table class="easyui-datagrid" title="折叠表格" style="700px;height:250px"
data-options="singleSelect:true,collapsible:true,url:'../JSON/data.json'">
<thead>
<tr>
<th data-options="field:'itemid',80,halign:'center'">项目编号</th>
<th data-options="field:'productid',100,halign:'center'">产品</th>
<th data-options="field:'listprice',80,align:'right',halign:'center'">总价</th>
<th data-options="field:'unitcost',80,align:'right',halign:'center'">单价</th>
<th data-options="field:'attr1',250,halign:'center'">属性</th>
<th data-options="field:'status',60,align:'center',halign:'center'">地位</th>
</tr>
</thead>
</table>
</body>
</html>