flask中jsonify和json.dumps的区别

1. json.dumps()用于将dict类型的数据转成str

@app.route('/json')
def demo1():
    my_dict = {'name':'dongge','age':30}
    return json.dumps(my_dict)
    # return jsonify(my_dict)

{"age": 30, "name": "dongge"}

HTTP/1.0 200 OK

Content-Type: text/html; charset=utf-8

Content-Length: 29

Set-Cookie: session=eyJuYW1lIjp7IiBiIjoiY0hsMGFHOXVNalE9In19.DYYwPw.NcRdbLbteD6X7q56CCfJBbCnKrc; HttpOnly; Path=/

Server: Werkzeug/0.12.2 Python/2.7.12

Date: Sun, 11 Mar 2018 03:13:03 GMT

2.jsonify返回一个json对象

@app.route('/json')
def demo1():
    my_dict = {'name':'dongge','age':30}
    # return json.dumps(my_dict)
    return jsonify(my_dict)

{
  "age": 30, 
  "name": "dongge"
}

HTTP/1.0 200 OK

Content-Type: application/json

Content-Length: 36

Set-Cookie: session=eyJuYW1lIjp7IiBiIjoiY0hsMGFHOXVNalE9In19.DYYwuA.RTNYDDNa3a4zknHaZdaV_Kib_EM; HttpOnly; Path=/

Server: Werkzeug/0.12.2 Python/2.7.12

Date: Sun, 11 Mar 2018 03:15:04 GMT

jsonify源码

def jsonify(*args, **kwargs):
indent = None
    if current_app.config['JSONIFY_PRETTYPRINT_REGULAR'] \
        and not request.is_xhr:
        indent = 2
    return current_app.response_class(dumps(dict(*args, **kwargs),
        indent=indent),
        mimetype='application/json')

个人理解：

1，json.dumps只是将dict类型转化为str类型，并非一个json对象，我理解的是拥有json格式的字符串。

2，jsonify其实也是用dumps方法转换成了json格式的字符串，只不过在最后改变了传输的数据类型。

3，jsonify将dict类型转变为json对象。