Node.JS读取文本并转化成js对象

****admin.txt:{"mm":"123","name":"沫、D"}****zz的值:admin*****代码:var fs=require('fs');        var JsonObjString=fs.readFileSync('./zh/'+zz+'.txt');        console.log(typeof JsonObjString);        console.log(JsonObjString.length);        var str = iconv.decode(JsonObjString, 'gbk');//obj3为js对象      var  obj3 = JSON.parse(str);    console.log(typeof obj3)    console.log(obj3.name)//沫、D