取得Json物件的長度以及判斷json物件是否為空

假設json為： 

Json代碼  

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

以下是獲取json物件的長度的方法： 

Js代碼  

Js代碼  

function getJsonObjLength(jsonObj) {  
    var Length = 0;  
    for (var item in jsonObj) {  
        Length++;  
    }  
    return Length;  
}

= = = = = = = = = = = = = = = = 判斷json物件是否為空= = = = = = = = = = = = = = = = = c

Js代碼  

alert(getJsonObjLength(str)) //2