JSON.stringify 详细用法

1.常用[object]

var user = {
name:'Tomson',
age:18,
lastName:'Smith',
family:{
father:{
name:'Tom',
age:40,
lastName:'John'
}
}
}

var jsonStr = JSON.stringify(user);
console.log(jsonStr);

//控制台输出：
// {"name":"Tomson","age":18,"lastName":"Smith","family":{"father":{"name":"Tom","age":40,"lastName":"John"}}}

2.两个参数[object，filterFunc]

var filter = function(key,value){
if(typeof value == 'string'){
return value.toUpperCase();
}
return value;
}
var jsonStr = JSON.stringify(user,filter);
console.log(jsonStr);

//控制台输出：
//{"name":"TOMSON","age":18,"lastName":"SMITH","family":{"father":{"name":"TOM","age":40,"lastName":"JOHN"}}}

3.三个参数[object，filterFunc，indent]

var jsonStr = JSON.stringify(user,filter,4);
console.log(jsonStr);

//控制台输出
{
"name": "TOMSON",
"age": 18,
"lastName": "SMITH",
"family": {
"father": {
"name": "TOM",
"age": 40,
"lastName": "JOHN"
}
}
}

小结：