JS对象转字符串保留方法，字符串转对象

var obj = {
            name:"zhangsan",
            age:20,
            say:function(name){
                console.log("My name is " + (name ? name : this.name));
            },
            hello:function(){
                console.log("Hello");
            },
            talk:function(name, age){
                console.log("My name is " + (name ? name : this.name) + ",my age is " + (age ? age : this.age));
            }
    };

    function stringifyObj(obj){
        var newObj = {};
        for(var key in obj){
            if(obj.hasOwnProperty(key) && obj[key] instanceof Function){
                newObj[key] = obj[key].toString().replace(/[\n\t]/g,"");
                continue;
            }
            newObj[key] = obj[key];
        }
        return JSON.stringify(newObj);
    }

    function parseObj(strObj){
        var obj = JSON.parse(strObj);
        var funReg = /function\s\(.*\)/;
        for(var key in obj){
            if(funReg.test(obj[key])){
                try{
                    var fun = (new Function("return " + obj[key]))();
                    if(fun instanceof Function){
                        obj[key] = fun;
                    }
                }catch(e){
                    console.log(e)
                }
            }
        }
        return obj;
    }