json 用于浏览器和服务器进行数据传输的一种数据格式

1，接收json，并通过json.loads处理为字典，result已经变为dict字典数据类型

from flask import Flask
import json
​
app = Flask(__name__)
​
@app.route('/')
def demo2():
    json_demo = '{"age": 18, "name": "小明", "class": "7"}'
    # dumps将json转换为字典
    result = json.loads(json_demo)
    return result
​
if __name__ == '__main__':
    app.run(debug=True)

通过json.dumps方法将字典转换为json数据类型返回给前端，result转换为json类型的字符串

from flask import Flask
import json

app = Flask(__name__)

@app.route('/')
def demo1():
    json_dict = {"age": 18, "name": "小明", "class": "7"}
    # dumps将字典转换为json
    result=json.dumps(json_dict,ensure_ascii=False)
    print(type(result))
    return result

if __name__ == '__main__':
    app.run(debug=True)

通过flask框架中的jsonify将字典类型的数据转化为json返回给前端

from flask import Flask,jsonify

app = Flask(__name__)

@app.route('/')
def demo1():
    json_demo = {"age": 18, "name": "小明", "class": "7"}
    # jsonify将字典转为json,并返回给前端content-type：application/json
    return jsonify(json_demo)

if __name__ == '__main__':
    app.run(debug=True)

json数据，中文无法展示，app配置中将JSON_AS_ASCII设置为False

from flask import Flask,jsonify
​
app = Flask(__name__)
​
# 解决浏览器中json数据，中文无法展示的问题
app.config['JSON_AS_ASCII']=False
​
@app.route('/')
def demo1():
    json_demo = {"age": 18, "name": "小明", "class": "7"}
    # jsonify将字典转为json,并返回给前端content-type：application/json
    return jsonify(json_demo)
​
if __name__ == '__main__':
    app.run(debug=True)