使用python flask_mail msg.body=通过电子邮件发送多个html表单域的数据“”

from flask import Flask, render_template
from flask_mail import Mail, Message

app = Flask(__name__)
app.config['MAIL_SERVER'] = 'smtp.example.com'
app.config['MAIL_PORT'] = 587
app.config['MAIL_USE_TLS'] = True
app.config['MAIL_USERNAME'] = 'your-email@example.com'
app.config['MAIL_PASSWORD'] = 'your-email-password'

mail = Mail(app)

@app.route('/send_email')
def send_email():
    # 获取表单数据
    form_data = {
        'name': 'John Doe',
        'email': 'johndoe@example.com',
        'message': 'Hello, Flask-Mail!'
    }

    # 渲染HTML模板
    html = render_template('email_template.html', form_data=form_data)

    # 创建邮件消息
    msg = Message('Form Submission', sender='your-email@example.com', recipients=['recipient@example.com'])
    msg.body = "This is the plain text body"
    msg.html = html

    # 发送邮件
    mail.send(msg)

    return 'Email sent!'

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