基于Flask实现对一张表的增删该查接口

1 创建数据库和表：

CREATE DATABASE IF NOT EXISTS `test`;

CREATE TABLE `person` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(100) NOT NULL,
  `telephone` varchar(100) NOT NULL,
  `sex` char(2) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

2 下载需要的python模块

flask， flask-cors，pymysql

pip install Flask
pip install flask-cors
pip install pymysql

3 代码：

mysqlutil.py文件

import pymysql


def getConn(host, port, username, password, database):
    """获得连接"""
    return pymysql.connect(host=host, port=port, user=username, password=password, database=database, charset='utf8')


def addPerson(name, telephone, sex, conn):
    """增加用户"""
    result = {
    
    }
    sql = "insert into person(name, telephone, sex) values ('%s', '%s', '%s')" % (
        name, telephone, sex)
    try:
        cursor = conn.cursor()
        cursor.execute(sql)
        conn.commit()
        print("add successfully!")
    except Exception as e:
        conn.rollback()
        print(e)
        print("fail to add!")
    result['row'] = cursor.rowcount
    return result


def all(conn):
    """获得所有用户"""
    cursor = conn.cursor()
    sql = "select * from person"
    list = []
    try:
        cursor.execute(sql)
        results = cursor.fetchall()
        for row in results:
            temp = {
    
    }
            temp['id'] = row[0]
            temp['name'] = row[1]
            temp['telephone'] = row[2]
            temp['sex'] = row[3]
            list.append(temp)
    except Exception as e:
        print(e)
    return list


def findById(conn, id):
    """根据id获得用户"""
    cursor = conn.cursor()
    sql = "select * from person where id='%s'" % (id)
    list = []
    try:
        cursor.execute(sql)
        results = cursor.fetchall()
        for row in results:
            temp = {
    
    }
            temp['id'] = row[0]
            temp['name'] = row[1]
            temp['telephone'] = row[2]
            temp['sex'] = row[3]
            list.append(temp)
    except Exception as e:
        print(e)
    return list[0]


def findByName(conn, name):
    """根据name获得用户"""
    cursor = conn.cursor()
    sql = "select * from person where name='%s'" % (name)
    list = []
    try:
        cursor.execute(sql)
        results = cursor.fetchall()
        for row in results:
            temp = {
    
    }
            temp['id'] = row[0]
            temp['name'] = row[1]
            temp['telephone'] = row[2]
            temp['sex'] = row[3]
            list.append(temp)
    except Exception as e:
        print(e)
    return list[0]


def deleteAll(conn):
    """删除所有用户"""
    result = {
    
    }
    cursor = conn.cursor()
    sql = "delete from person"
    try:
        cursor.execute(sql)
        conn.commit()
    except Exception as e:
        conn.rollback()
        print(e)
    result['row'] = cursor.rowcount
    return result


def deleteById(conn, id):
    """根据Id删除用户"""
    result = {
    
    }
    cursor = conn.cursor()
    sql = "delete from person where id=%d " % (id)
    try:
        cursor.execute(sql)
        conn.commit()
    except Exception as e:
        conn.rollback()
        print(e)
    result['row'] = cursor.rowcount
    return result


def updateById(id, name, telephone, sex, conn):
    """根据id更新用户"""
    result = {
    
    }
    sql = "update person set name='%s', telephone='%s', sex='%s' where id=%d" % (
        name, telephone, sex, id)
    try:
        cursor = conn.cursor()
        cursor.execute(sql)
        conn.commit()
    except Exception as e:
        conn.rollback()
        print(e)
        print("fail to add!")
    result['row'] = cursor.rowcount
    return result

testmysql.py 文件：

import mysqlutil

def getConn():
    """根据主机ip，端口号，数据库用户名，数据库密码，数据库名获取数据库连接"""
    return mysqlutil.getConn(host='127.0.0.1', port=3306, username='root', password='root', database='test')

app.py文件：

import json
from flask import Flask
from flask import request
from flask_cors import CORS
import testmysql
import mysqlutil
import json

app = Flask(__name__)
# 解决跨域问题
CORS(app)

@app.route("/")
def hello_world():
    return "<h1>Hello, World!</h1>"

@app.route("/person/all")
def findAllPerson():
    conn = testmysql.getConn()
    list = mysqlutil.all(conn)
    conn.close()
    return json.dumps(list)

@app.route("/person/id/<id>")
def findPersonById(id):
    conn = testmysql.getConn()
    person = mysqlutil.findById(conn, id)
    conn.close()
    return json.dumps(person)

@app.route("/person/delete/id/<id>")
def deletePersonById(id):
    conn = testmysql.getConn()
    result = mysqlutil.deleteById(conn, int(id))
    conn.close()
    return json.dumps(result)

@app.route("/person/add", methods=['POST'])
def addPerson():
    print("addperson")
    name = request.json['name']
    telephone = request.json['telephone']
    sex = request.json['sex']
    conn = testmysql.getConn()
    result = mysqlutil.addPerson(name, telephone, sex, conn)
    conn.close()
    return json.dumps(result)

@app.route("/person/update", methods=["POST"])
def updatePerson():
    id = request.json['id']
    name = request.json['name']
    telephone = request.json['telephone']
    sex = request.json['sex']
    conn = testmysql.getConn()
    result = mysqlutil.updateById(int(id), name, telephone, sex, conn)
    conn.close()
    return json.dumps(result)