JSON 学习之JSON in JavaScript详细使用说明

复制代码 代码如下:

<script type="text/javascript" src="scripts/json/json2.js"></script>
<script type="text/javascript" src="scripts/json/jsonmessage.js"></script>

复制代码 代码如下:

//创建一个空对象
var JSONObject = {}
//创建一个新的对象
var JSONObject = new Object()
//创建一个包含属性的对象，其中名称为字符串，年龄为整型
var JSONObject = {
"name":"kevin",
"age":23
}

复制代码 代码如下:

var JSONObject = {
    "name":"kevin",
    "age":24,
};

alert("JSONObject.name:"+JSONObject.name);
alert("JSONObject.age:"+JSONObject.age);

复制代码 代码如下:

var student = {
    //第一个数组对象Class
    "Class":[
        {
            "name":"kevin",
            "className":"java",
            "age":23
        },
        {
            "name":"yang",
            "className":"java",
            "age":24
        }    
    ],
    //第二个数组对象
    "Score":[
        {
            "name":"shower",
            "score":100
        },
        {
            "name":"zheng",
            "score":100
        }
    ]
}

var i=0;

for(i=0;i<student.Class.length;i++){
    alert("student.Class["+i+"].name===>"+student.Class[i].name);
    alert("student.Class["+i+"].className===>"+student.Class[i].className);
    alert("student.Class["+i+"].age===>"+student.Class[i].age);
}

for(i=0;i<student.Score.length;i++){
    alert("student.Score["+i+"].name===>"+student.Score[i].name);
    alert("student.Score["+i+"].score===>"+student.Score[i].score);
}

复制代码 代码如下:

//create a Student Object
var Student = {
    "Math":[{
            "name":"kevin",
            "mark":70,
            "age":23
        },{
            "name":"smart",
            "mark":40,
            "age":25
        }
    ],
    "Science":[{
            "name":"kevin2",
            "mark":70,
            "age":23
        },{
            "name":"smart2",
            "mark":40,
            "age":25
        }
    ]
}

//print array value
var i = 0;
var array = new Array();

for(i=0;i<Student.Math.length;i++){
    array.push(Student.Math[i].name);
    array.push(Student.Math[i].mark);
    array.push(Student.Math[i].age);
}

for(i=0;i<Student.Science.length;i++){
    array.push(Student.Science[i].name);
    array.push(Student.Science[i].mark);
    array.push(Student.Science[i].age);
}
alert("array==>"+array);

//This method produce a JSON text from a JavaScript value.
//这个方法将一个JavaScript值转换为一个JSON字符串
alert("array.toJSONString()==>"+array.toJSONString());
alert("String.parseJSON==>"+array.toJSONString().parseJSON());
var data2 = array.toJSONString().parseJSON();
if(data2 instanceof Array){
    alert("Array");
}

复制代码 代码如下:

//表达式有浏览器兼容问题
//var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
// escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
//这个是修正后的
var cx = new RegExp('/[\\u0000\\u00ad\\u0600-\\u0604\\u070f\\u17b4\\u17b5\\u200c-\\u200f\\u2028-\\u202f\\u2060-\\u206f\\ufeff\\ufff0-\\uffff]/g'),
escapable = new RegExp('/[\\\\\\"\\x00-\\x1f\\x7f-\\x9f\\u00ad\\u0600-\\u0604\\u070f\\u17b4\\u17b5\\u200c-\\u200f\\u2028-\\u202f\\u2060-\\u206f\\ufeff\\ufff0-\\uffff]/g'),