JavaScript------处理Json数据

//JSON相关函数
JSON.parse();         //将JSON字符串转换为JavaScript对象
JSON.stringify();     //将JavaScript值转换为JSON字符串

1.
//JSON数据
var str = {
        firstName: "John",
        lastName: "Doe",
        age: "50",
        eyeColor: "blue",
        fullName: function () {
            return this.firstName + " " + this.lastName;
        },
        datas: {
            "boss":["a","b","c"],
            "employee": ["1","2","3"]
        }
    }; 

alert(str.datas.employee);
alert(JSON.stringify(str));

2.
//JSON数据
var str = {
        firstName: "John",
        lastName: "Doe",
        age: "50",
        eyeColor: "blue",
        fullName: function () {
            return this.firstName + " " + this.lastName;
        },
        datas: {
            "boss":["a","b","c"],
            "employee": [
                { "name": "Job", "age": "12" },
                { "name": "Tony", "age": "22" },
                { "name": "Ban", "age": "32" }]
        }
    };

//alert(str.datas.employee);
for (var i = 0; i < str.datas.employee.length; i++) {
　　alert(str.datas.employee[i].name);
}

3.
//JSon数据的字符串
var data = '{"employees": [{ "name": "Job", "age": "12" },{ "name": "Tony", "age": "22" },{ "name": "Ban", "age": "32" }]}';

//将字符串转为js对象
var obj = JSON.parse(data);

for (var i = 0; i < obj.employees.length; i++) {
　　alert(obj.employees[i].age);
}

4.
JSON.parse('{"1": 1, "2": 2, "3": {"4": 4, "5": {"6": 6}}}', function (k, v) {
　　document.write(k);// 输出当前属性，最后一个为 ""(空)
　　document.write("<br>");
　　alert(v);
　　return v;       // 返回修改的值
});