flask讀取資料庫(mysql)並展示表格（講解獲取表頭的方法）【附上flask好看點的helloworld】
阿新 • • 發佈：2018-12-12
簡述
為了網頁的好看，最好還是用bootstrap
文章目錄
好看點的helloworld
anyway,先看初始版本的 helloworld
- /template/index.html
- 來自於bootstrap官網
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags --> - ./app.py
from flask import Flask, render_template
app = Flask(__name__)
@app.route('/')
def hello_world():
return render_template('index.html')
if __name__ == '__main__':
app.run()
連結資料庫
這裡我推薦使用pymysql
因為這個在不同平臺上都可以使用，而且安裝也沒什麼坑。
pip install pymysql
- 連結的示範
- conn是一個聯結器
- host是url
- user是使用者
- password是密碼
- db是資料庫（也就是show databases;可以看到的）
- charset主要是為了設定為可以看中文
import pymysql
conn = pymysql.connect(
host='127.0.0.1',
user='root',
password='1234',
db='library_management_system',
charset='utf8'
)
結合在html上和flask上
html程式碼修改
- /templates/index.html
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"
integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<title>Hello, world!</title>
</head>
<body>
<div class="row">
<div class="col-md-6 col-sm-12 col-xs-12">
<div class="panel panel-default">
<div class="panel-heading">
<h3>Students</h3>
</div>
<div class="panel-body">
<div class="table-responsive">
<table class="table table-striped table-bordered table-hover">
<thead>
<tr>
{% for i in labels %}
<td>{{ i }}</td>
{% endfor %}
</tr>
</thead>
<tbody>
{% for i in content %}
<tr>
{% for j in i %}
<td>{{ j }}</td>
{% endfor %}
</tr>
{% endfor %}
</tbody>
</table>
</div>
</div>
</div>
</div>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"
integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49"
crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"
integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy"
crossorigin="anonymous"></script>
</body>
</html>
from flask import Flask, render_template
import pymysql
app = Flask(__name__)
conn = pymysql.connect(
host='127.0.0.1',
user='root',
password='1234',
db='jxgl',
charset='utf8'
)
@app.route('/')
def hello_world():
cur = conn.cursor()
# get annual sales rank
sql = "select * from student"
cur.execute(sql)
content = cur.fetchall()
# 獲取表頭
sql = "SHOW FIELDS FROM student"
cur.execute(sql)
labels = cur.fetchall()
labels = [l[0] for l in labels]
return render_template('index.html', labels=labels, content=content)
if __name__ == '__main__':
app.run()
- 效果:
