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获取Json对象的长度以及判断json对象是否为空

程序员文章站 2024-01-24 18:30:46
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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  
}