JSON格式的创建

创建一个以“admin”为键的JSON字符串

JSONObject jsonObj = new JSONObject();JSONArray jsonArray = new JSONArray();jsonObj.element("admin", jsonArray);

动态生成JSON字符串

var data={};var purviewArray=new Array();Ext.Array.each(records, function(rec){var objuditors={userName:rec.get('userName'),userFullName:rec.raw.userFullName};//试用rec.get()和rec.raw取值效果一样purviewArray.push(objuditors);}); data.purview = purviewArray;向后台传值的时候参数要写Ext.encode(purviewArray)Ext.encode()方法的作用就在于将字符串转成JSON格式输入结果为{"purview":[{"userName":"wy","userFullName":"王一"},{"userName":"lh","userFullName":"刘欢"}]}