如何利用MySQL和Python开发一个简单的在线调查问卷

hzh932

9个月前发布

02814

简介
在线调查问卷在现代社会中被广泛使用，用于收集用户的观点、反馈和意见。本文将介绍如何使用MySQL和Python开发一个简单的在线调查问卷系统，并提供相关的代码示例。

一、数据库设计

创建一个名为survey的数据库：
```
CREATE DATABASE survey;
```

创建名为questions和responses的表：
创建questions表，用于存储调查问卷的问题：

CREATE TABLE questions (
id INT PRIMARY KEY AUTO_INCREMENT,
question_text VARCHAR(255) NOT NULL
);

创建responses表，用于存储用户的答案：

CREATE TABLE responses (
id INT PRIMARY KEY AUTO_INCREMENT,
question_id INT,
response_text VARCHAR(255) NOT NULL,
FOREIGN KEY (question_id) REFERENCES questions(id)
);

二、Python代码实现

导入必要的库：

import mysql.connector
from mysql.connector import Error
from flask import Flask, request, render_template

连接到MySQL数据库：

def create_connection():
connection = None
try:
connection = mysql.connector.connect(
host='localhost',
database='survey',
user='your_username',
password='your_password'
)
if connection.is_connected():
print('Connected to MySQL database')
except Error as e:
print(e)
return connection

创建Flask应用和路由：

app = Flask(__name__)
@app.route('/')
def home():
# 获取所有的问题
connection = create_connection()
cursor = connection.cursor()
query = 'SELECT * FROM questions'
cursor.execute(query)
questions = cursor.fetchall()
cursor.close()
connection.close()
return render_template('index.html', questions=questions)
@app.route('/survey', methods=['POST'])
def survey():
# 获取用户的答案
connection = create_connection()
cursor = connection.cursor()
response_text = request.form['response']
question_id = request.form['question_id']
query = 'INSERT INTO responses (question_id, response_text) VALUES (%s, %s)'
cursor.execute(query, (question_id, response_text))
connection.commit()
cursor.close()
connection.close()
return 'Thank you for your response!'
if __name__ == '__main__':
app.run()

创建前端页面(index.html)：

<!DOCTYPE html>
<html>
<head>
<title>Survey</title>
</head>
<body>
<h1>Survey</h1>
<form action="/survey" method="POST">
{% for question in questions %}
<p>{{ question[1] }}</p>
<input type="hidden" name="question_id" value="{{ question[0] }}">
<input type="text" name="response" required>
{% endfor %}
<input type="submit" value="Submit">
</form>
</body>
</html>

三、运行和测试