获取Json对象的长度以及判断json对象是否为空

假设json为：

Json代码

[{"name":'a',"age":1,"sex":"0","title":"hello","state":"0","id":"1"},{"name":'b',"age":2,"sex":"1","title":"bye","state":"0","id":"2"}]

以下是获取json对象的长度的方法：

Js代码

function getJsonObjLength(jsonObj) {

var Length = 0;

for (var item in jsonObj) {

Length++;

}

return Length;

}

通过该方法就可以获取到。

Js代码

alert(getJsonObjLength(str)) //2

= = = = = = = = = = = = = = = = 判断json对象是否为空 = = = = = = = = = = = = = = = = = =

Js代码

var json={a:12,b:45}

for(var key in json){

alert(key); //a, b

alert(json[key]); //12, 45

}