Python/PHP/JS对象与json数据的转换key顺序问题

1、PHP关联数组与json数据转换前后key的顺序不变

<?php

// obj -> json
$obj1 = [ 'name'=>'Tom', 'age'=> 23,
];

$obj2 = [ 'age'=> 23, 'name'=>'Tom',
];

print_r(json_encode($obj1));
// {"name":"Tom","age":23}

print_r(json_encode($obj2));
// {"age":23,"name":"Tom"}


// json -> obj
print_r(json_decode('{"name":"Tom","age":23}'));
// ([name] => Tom [age] => 23)

print_r(json_decode('{"age":23,"name":"Tom"}'));
// ([age] => 23 [name] => Tom)

  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
  
18
  
19
  
20
  
21
  
22
  
23
  
24
  
25
  
26
 

2、Python字典结构与json转换后3.6之前顺序不一致，之后顺序保持一致

import json

# obj -> json
obj1 = {"age":23,"name":"Tom"}
print(json.dumps(obj1))
# {"age": 23, "name": "Tom"}

obj2 = {"name":"Tom", "age":23}
print(json.dumps(obj2))
# python3.7 {"name": "Tom", "age": 23}
# python3.6.5 {"name": "Tom", "age": 23}
# python2.7 {"age": 23, "name": "Tom"}


# json -> obj
arr1 = json.loads('{"age":23,"name":"Tom"}')
print(arr1)
# {'age': 23, 'name': 'Tom'}

arr2 = json.loads('{"name":"Tom", "age":23}')
print(arr2)
# python3.7 {'name': 'Tom', 'age': 23}
# python3.6.5 {"name": "Tom", "age": 23}
# python2.7 {u'age': 23, u'name': u'Tom'}

  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
  
18
  
19
  
20
  
21
  
22
  
23
  
24
 

Python 3.6 开始dict字典开始变得有序

[Python-Dev] Python 3.6 dict becomes compact and gets a private version; and keywords become ordered

3、JS数据对象和json数据转换之后key顺序保持不变

// obj -> json
var obj1 = {"age":23,"name":"Tom"}
var obj2 = {"name":"Tom", "age":23}

console.log(JSON.stringify(obj1));
// {"age":23,"name":"Tom"}

console.log(JSON.stringify(obj2));
// {"name":"Tom","age":23}

// json -> obj
console.log(JSON.parse('{"age":23,"name":"Tom"}'));
// { age: 23, name: 'Tom' }

console.log(JSON.parse('{"name":"Tom", "age":23}'));
// { name: 'Tom', age: 23 }

  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
 

文章来源: pengshiyu.blog.csdn.net，作者：彭世瑜，版权归原作者所有，如需转载，请联系作者。

原文链接：pengshiyu.blog.csdn.net/article/details/114938211