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={}