node.js 后台解析数据

console.log(result)
var str = JSON.stringify(result);
console.log(str);

var obj2 = JSON.parse(str);
console.log(obj2);

三次输出的结果

[ RowDataPacket { TotalCount: 0 } ]

[{"TotalCount":0}]

[ { TotalCount: 0 } ]

输出[ { TotalCount: 0 } ]的结果0 

console.log(obj2[0].TotalCount)

自己定义的json 输出的结果

var obj = {
"name": "LiLi",
"age": 22,
"sex": "F"
};
var str = JSON.stringify(obj);
console.log(str);

var obj2 = JSON.parse(str);
console.log(obj2);

{"name":"LiLi","age":22,"sex":"F"}

{ name: 'LiLi', age: 22, sex: 'F' }

输出这个结果

console.log(obj2.name)