Today was how to resolve the following complex json object to the difficult living over a long time .. did not find documentation how to read JsonReader Ways json object (possibly also because of their limited level of E the text did not correctly understand the meaning of the document.) 

/*json代码*/ { "loginName":"lvjian0", "password":"1230", "type":{ "typeId":1, "typeName":"近卫" } }

After doubled baidu + google finally found a solution:

Use convert: function (v) () treatment of complex objects:



Specific code as follows: 

/*我的ext-json-grid.js代码*/
Ext.onReady(function() {

	var proxy = new Ext.data.HttpProxy( {
		url : 'grid.do?operator=read'
	});
	// 定义reader
		var reader = new Ext.data.JsonReader( {
			id : 'loginName'
		}, [ {
			name : 'loginName'
		}, {
			name : 'password'
		}, {
			name : 'type', convert : function(v) {
				return v.typeName;
   			}
		}])
		// 构建Store
		var store = new Ext.data.Store( {
			proxy : proxy,
			reader : reader
		});
		// 载入
		store.load();

		// create the grid
		var grid = new Ext.grid.GridPanel( {
			store : store,
			columns : [ {
				header : "Login Name",
				width : 110,
				dataIndex : 'loginName',
				sortable : true
			}, {
				header : "Password",
				width : 120,
				dataIndex : 'password',
				sortable : true
			}, {
				header : "Type",
				width : 120,
				dataIndex : 'type',
				sortable : true
			}],
			renderTo : 'example-grid',
			width : 540,
			height : 200
		});

	});

html code: 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>register.html</title>
    <link href="scripts/ext/resources/css/ext-all.css" rel="stylesheet" type="text/css" />
	<script src="scripts/ext/adapter/ext/ext-base.js" type="text/javascript"></script>
    <script src="scripts/ext/ext-all.js" type="text/javascript"></script>
    <script src="scripts/ext-json-grid.js" type="text/javascript"></script>
  </head>  
  <body>
  	<div>
    </div>
  </body>
</html>