JavaScript--字符串與JSON對象相互轉換

JSON.parse()

兼容性：Chrome，Firefox (Gecko) 3.5 (1.9.1)，IE 8.0，Safari 4.0

JSON.parse('[1, 5, "false"]');

JSON.parse('{"p": 5}', function (k, v) {
    if(k === '') return v;     // 若是到了最頂層，則直接返回屬性值，
    return v * 2;              // 不然將屬性值變爲原來的 2 倍。
});                            // { p: 10 }

JSON.stringify()
兼容性：Chrome，Firefox (Gecko) 3.5 (1.9.1)，IE 8.0，Safari 4.0
    var student = new Object();
    student.name = "Lanny";
    student.age = "25";
    student.location = "China";
    var json1 = JSON.stringify(student);
    //{"name":"Lanny","age":"25","location":"China"}
    
    //只保留：name及locaiton
    var json2 = JSON.stringify(student,["name","location"]);
    //{"name":"Lanny","location":"China"}

    //處理特定屬性
    var json3 = JSON.stringify(student, function (key, value) {
        switch (key){
            case "name":
                return "my name is " + value;
            default :
                return value;
        }
    });
    //{"name":"my name is Lanny","age":"25","location":"China"}