flask做后端去获取前端vue+axios(post)的数据,flask这一块该如何去做

简单写了个示例，对你有帮助能点个采纳，谢谢~

server.py

from flask import Flask, request,render_template
import json
app = Flask(__name__, static_url_path='')

@app.route('/', methods=['POST'])
def index():
   username=request.form.get("username") or "username为空"
   username2=request.form.get("username2") or "username2为空"
   password=request.form.get("password") or "password为空"
   password2=request.form.get("password2") or "password2为空"
   #你的处理逻辑，下面只是简单返回提交的数据
   return username+username2+password+password2
@app.route('/register', methods=['GET'])
def register():
   return render_template("register.html")

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=5000)

templates\register.html

<meta charset="utf-8" />
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<script>
    params = { username: 'username', password: 'pwd1', username2: 'username2', password2: 'pwd2' };
    var data = '';
    for (attr in params) data += '&' + attr + '=' + encodeURIComponent(params[attr]);//转键值对，然后设置下content-type。axios的content-type是application/json的，不是键值对
    data = data.substring(1)
    axios.post('/', data,
        { headers: { 'content-type': "application/x-www-form-urlencoded" } })
        .then((res) => {
            alert(res.data)
        })
        .catch(() => { });
</script>

写api接口，就是视图的返回结果以JSON格式返回就可以了