python+ajax+mysql简单前后端数据库的搭建

• 前言
• 一、前端 hbuilderx
• 二、后端 python
• 三、数据库
• 总结

pycharm+hbuilderx+navicat

import json
from flask import *
from flask import Flask, request, jsonify, make_response
import pymysql

app = Flask('__name__')

@app.after_request
def cors(environ):
    environ.headers['Access-Control-Allow-Origin']='*'
    environ.headers['Access-Control-Allow-Method']='*'
    environ.headers['Access-Control-Allow-Headers']='x-requested-with,content-type'
    return environ

#获取数据库里的信息 传递到前端
@app.route('/allinfor',methods = ['POST'])
def allinfor():
	#获取前端发给的信息
	data =request.get_data()
    json_data = json.loads(data)
    print(json_data)
    a = list(dict.values(json_data))
		
    #数据库获取到信息
    conn = pymysql.Connection(host = 'localhost',user = 'root', password = '152800' ,port = 3306 ,database ='tw')
    cursor = conn.cursor()
    sql = "select * from tw_sql "
    cursor.execute(sql)
    conn.commit()
    a = cursor.fetchall()
	
	#处理后的信息返回给前端
	pp =[]
    info = dict()
    for i in a:
        i = list(i)
        pp.append(i)
    #字典的形式返回
    info['allinfor'] = pp

    return jsonify(info)



if __name__ == '__main__':
    app.run(port=8899)

要保证打开着 ！
数据库连接的代码 后端里面写过的

conn = pymysql.Connection(host = 'localhost',user = 'root', password = '152800' ,port = 3306 ,database ='tw')
cursor = conn.cursor()
sql = "select * from tw_sql "
cursor.execute(sql)
conn.commit()

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