from flask import Flask
import pymysql
import xlwt
from io import BytesIO
from flask import make_responsedb = pymysql.connect(host='127.0.0.1',port=3306,user='user', passwd='pwd', db='db_name', charset='utf8')  # 创建链接def data_db():  # 去数据库取数据，假设数据库表只有4个字段sql = """select * from table_name;"""cc = db.cursor()  # 其实就是用来获得python执行Mysql命令的方法,也就是我们所说的操作游标cc.execute(sql)  # 真正执行sql语句cn = cc.fetchall()  # 接收全部的返回结果行rowreturn cn  # 返回app = Flask(__name__)@app.route('/index_up')  # 设置路由
def index_list():  # 执行视图函数ret = data_db()  # 获取数据wb = xlwt.Workbook(encoding='utf-8')  # 实例化，有encoding和style_compression参数ws = wb.add_sheet("111", cell_overwrite_ok=True)  # Workbook的方法，生成名为111.xls文件row0 = ['字段1', '字段2', '字段3', '字段4']  # 指定xls文件的字段for i in range(0, len(row0)):  # 将这些字段写入111.xls文件ws.write(0, i, row0[i])k = 1for i in ret:  # 循环每一列for j in range(4):  # 在每列添加数据ws.write(k, j, i[j])        k += 1sio = BytesIO()  # 将获取的数据在内存中写，有时会用到StringIO()wb.save(sio)  # 将文件流保存sio.seek(0)  # 光标response = make_response(sio.getvalue())  # response.headers['Content-type'] = 'application/vnd.ms-excel'  # 指定返回的类型response.headers['Transfer-Encoding'] = 'chunked'response.headers['Content-Disposition'] = 'attachment;filename=111.xls'  # 设定用户浏览器显示的保存文件名return response  # 返回response，浏览器会出现如下效果，如果返回其他，比如None就会只下载不在浏览器提示。if __name__ == '__main__':app.run()

from flask import Flask
import pymysql
import xlwt
from io import BytesIO
from flask import make_responsedb = pymysql.connect(host='127.0.0.1',port=3306,user='user', passwd='pwd', db='db_name', charset='utf8')  # 创建链接def data_db():  # 去数据库取数据，假设数据库表只有4个字段sql = """select * from table_name;"""cc = db.cursor()  # 其实就是用来获得python执行Mysql命令的方法,也就是
我们所说的操作游标cc.execute(sql)  # 真正执行sql语句cn = cc.fetchall()  # 接收全部的返回结果行rowreturn cn  # 返回

app = Flask(__name__)@app.route('/index_up')  # 设置路由
def index_list():  # 执行视图函数
ret = data_db()  # 获取数据wb = xlwt.Workbook(encoding='utf-8')  # 实例化，有encoding和style_compression参数ws = wb.add_sheet("111", cell_overwrite_ok=True)  # Workbook的方法，生成名为111.xls文件row0 = ['字段1', '字段2', '字段3', '字段4']  # 指定xls文件的字段for i in range(0, len(row0)):  # 将这些字段写入111.xls文件
        ws.write(0, i, row0[i])k = 1for i in ret:  # 循环每一列for j in range(4):  # 在每列添加数据
            ws.write(k, j, i[j])k += 1today = str(datetime.datetime.now())file_name = "day_data" + today[0:13] + ".xls"fp = r"E:/我的资料/inner_ctrl01/ttt"wb.save(file_name)shutil.move(file_name, os.path.join(fp, file_name))return 'ok'  # 必须return，并且不能return 空if __name__ == '__main__':app.run()