Flask连接MySQL

news2024/11/29 4:38:07

本文章涉及到Flask框架和HTML内容，相关知识可查看链接

HTML-form表单和提交_html form 提交_小梁今天敲代码了吗的博客-CSDN博客https://blog.csdn.net/weixin_43780415/article/details/130110722

前端引入和html标签_小梁今天敲代码了吗的博客-CSDN博客https://blog.csdn.net/weixin_43780415/article/details/130090994

HTML超链接和简单登陆界面_小梁今天敲代码了吗的博客-CSDN博客https://blog.csdn.net/weixin_43780415/article/details/130097939上一次我们知道了Python如何连接MySQL，现在我们通过Flask框架，将网页上收到的内容，存进数据库中

将网页收集数据存储至MySQL中：

（Python代码）

from flask import Flask,render_template,request
import pymysql
app = Flask(__name__)

@app.route("/add/user",methods=['GET','POST'])
def add_user():
    if request.method == "GET":
        return render_template("add_user.html")

    username = request.form.get("user")
    password = request.form.get("pwd")
    mobile = request.form.get("mobile")
    #1.连接MySQL
    conn = pymysql.connect(host="127.0.0.1",port=3306,user="root",passwd="123456",charset="utf8",db="unicom")
    cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
    #2.执行SQL
    sql="insert into admin(username,password,mobile) values(%s,%s,%s)"
    cursor.execute(sql,[username,password,mobile])
    conn.commit()
    #3.关闭连接
    cursor.close()
    conn.close()
    return "添加成功"
if __name__ == '__main__':
    app.run()

（HTML代码）

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <h1>添加用户</h1>
    <form method="post" action="/add/user">
        <input type="text" name="user" placeholder="用户名">
        <input type="text" name="pwd" placeholder="密码">
        <input type="text" name="mobile" placeholder="手机号">
        <input type="submit" value="提 交">
    </form>
</body>
</html>

在此界面输入内容，点击提交后，添加入MySQL中

将MySQL数据展现到网页上：

from flask import Flask,render_template,request
import pymysql
app = Flask(__name__)


@app.route("/show/user")
def show_user():
    # 1.连接MySQL
    conn = pymysql.connect(host="127.0.0.1", port=3306, user="root", passwd="123456", charset="utf8", db='unicom')
    cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)  # 游标
    # 2.发送指令
    sql = "select * from admin"
    cursor.execute(sql)

    data_list = cursor.fetchall()# :将返回所有结果，返回二维元组，如((‘id’,‘title’),(‘id’,‘title’)),
    # for row_dict in data_list:
    # print(row_dict)

    # 3.关闭
    cursor.close()
    conn.close()
    print(data_list)
    #1.找到index.html文件，读取所有的内容
    #2.找到内容中“特殊占位符”，将数据替换
    #3.将替换完成的字符串返回给用户的浏览器
    return render_template("show_user.html",data_list=data_list)
if __name__ == '__main__':
    app.run()

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
  <h1>用户列表</h1>
  <table border="1">
    <thead>
      <tr>
        <th>ID</th>
        <th>姓名</th>
        <th>密码</th>
        <th>手机号</th>
      </tr>
    </thead>
    <tbody>
    {% for item in data_list %}<!--把数据库中每一项数据挨个呈现-->
      <tr>
        <td>{{item.id}}</td>
        <td>{{item.username}}</td>
        <td>{{item.password}}</td>
        <td>{{item.mobile}}</td>
      </tr>
    {% endfor%}
    </tbody>
  </table>
</body>
</html>