ExtJs4.1 Proxy Api的运用

    		Ext.define('User', {
			    extend: 'Ext.data.Model',
			    fields: [
			        {name: 'id',  type: 'string'},
			        {name: 'roleName',   type: 'string'},
			        {name: 'createDate'},
			        {name: 'state'}
			    ],
			    proxy: {
			        type: 'ajax',
			        api: {
					    create  : 'proxyApiController.do?method=create',
					    read    : 'proxyApiController.do?method=create',
					    update  : 'proxyApiController.do?method=update',
					    destroy : 'proxyApiController.do?method=create'
					},
			        writer: {
			        	type: "json",
			        	encode: true,
			        	allowSingle: false,
			        	root: "data"
			        }
			    }
			});