JavaScript Json对象和Json对象字符串的关系 jsonObj<->JsonString

JavaScript Json对象和Json对象字符串的关系 jsonObj<->JsonString

如下示例:

直接写的a1就是一个Json对象,a2 就是一个Json对象字符串; 通过eval函数 得到的 都是Json对象, 不管参数是对象还是 字符串.

 function JTS(o){
     var arr = [];
     var fmt = function(s) {
         if (typeof s == "object" && s != null)
             return JTS(s);
         return /^(string|number)$/.test(typeof s) ? "\"" + s + "\"" : s;
     }
     for (var i in o)
         arr.push("\"" + i + "\":" + fmt(o[i]));
     return "{" + arr.join(",") + "}";
 }
12
 //Json 对象
 var a1=[{"n1":"n1t","n2":"23","n3":"1"},{"n2":"n2t","n2":"12","n3":"1"},{"n3":"n3t","n2":"64","n3":"3"},{"n4":"n4t","n2":"78","n3":"4"},{"n5":"n5t","n2":"34","n3":"1"},{"n6":"n6t","n2":"56","n3":"4"},{"n7":"n7t","n2":"2","n3":"3"},{"n8":"n8t","n2":"1","n3":"4"}];
 //Json对象字符串
 var a2="[{\"n1\":\"n1t\",\"n2\":\"23\",\"n3\":\"1\"},{\"n2\":\"n2t\",\"n2\":\"12\",\"n3\":\"1\"},{\"n3\":\"n3t\",\"n2\":\"64\",\"n3\":\"3\"},{\"n4\":\"n4t\",\"n2\":\"78\",\"n3\":\"4\"},{\"n5\":\"n5t\",\"n2\":\"34\",\"n3\":\"1\"},{\"n6\":\"n6t\",\"n2\":\"56\",\"n3\":\"4\"},{\"n7\":\"n7t\",\"n2\":\"2\",\"n3\":\"3\"},{\"n8\":\"n8t\",\"n2\":\"1\",\"n3\":\"4\"}]";

 //eval(JsonObj) => JsonObj
 //eval(JsonString) => JsonObj

 function gow()
 {

   alert( JTS(eval(a2)) );
   alert(JTS(a1));

 }

当然,你也 可以直接定义一个对象:

//定义一个对象
var a3={}