python-基于flask的简单web查询程序

3个.py文件

app.py #转发器

create_html.py # 利用pandas 将result生成 表格形式

mysql.py #连接数据库获取数据.

app.py:

from flask import Flask
from flask import request
from create_html import convert_to_html
from mysql import get_result

app = Flask(__name__)

@app.route('/',methods=['GET','POST'])
def home():
    return '<h1>Home<h1>'

@app.route('/getdata',methods=['GET'])
def signig_from():
    result = get_result()#获取数据
    title = ['监护人','学校','年级','班级','学生姓名','托管时间','签订时间']
    h=convert_to_html(result,title)
    return h

#不用管下面
@app.route('/signin',methods=['POST'])
def signin():
    if request.form['username']=='admin' and request.form['password']=='password':
        return '<h3>Hello,admin!<h3>'

    return '<h3>Bad username or password.<h3/>'


if __name__ == '__main__':
    #指定ip和端口
    app.run(host='0.0.0.0', port=80)

mysql.py

import pymysql


def get_result():
    conn = pymysql.connect(host='xxxx',user='root',passwd='xxx',db='ygxy-sys')
    cur = conn.cursor()

    sql = '''SELECT
            a.guardian_name ,
            e.s_school ,
            e.s_session ,
            e.s_class ,
            d.NAME,
            case param->'$[0]'
            when '["0", "1", "0"]' then '中午'
            when '["0", "1", "1"]' then '中午/晚上'
            when '["0", "0", "1"]' then '晚上'
            else '其他'  end , 
            b.create_time 
    FROM
            guardian_data AS a,
            student_signed_protocol AS b,
            guardian_ship AS c,
            student_data AS d,
            student_school AS e 
    WHERE
            c.main_guardian_id = a.guardian_phone 
            AND b.id = c.id 
            AND b.sid = d.sid 
            AND d.sid = e.sid
    '''
    print(sql)
    result = [[],[],[],[],[],[],[]]
    try:
        cur.execute(sql)
        results = cur.fetchall()
        for row in results:
            for i in range(0,7):
                result[i].append(row[i])
    except Exception as e:
        print(e)
    finally:
        return result
        conn.close()

注:pandas中DataFrame 方法,接收数据的格式如下:

• result = [[u'2016-08-25',u'2016-08-26',u'2016-08-27'],[u'张三',u'李四',u'王二']]

• title = [u'日期',u'姓名']

从数据库里取出的值格式不是这样,所以需要做如下操作,把同一列值都放到一个list中

    result = [[],[],[],[],[],[],[]]
    try:
        cur.execute(sql)
        results = cur.fetchall()
        for row in results:
            for i in range(0,7):
                result[i].append(row[i])

create_html.py

import pandas as pd
from mysql import get_result




def convert_to_html(result,title):
    d = {}
    index = 0
    #for row in result:
    for t in title:
        d[t] = result[index]
        index+=1
    df = pd.DataFrame(d)
    #如数据过长，可能在表格中无法显示，加上pd.set_option语句可以避免这一情况
    pd.set_option('max_colwidth',200)
    df = df [title]
    h =df.to_html(index=True)
    with open('11.html','w',encoding='utf-8') as f:
        for eachline in h:
            f.write(eachline)
    return h

if __name__=="__main__":
    result = get_result()
    title = ['监护人','学校','年级','班级','学生姓名','托管时间','签订时间']
    convert_to_html(result,title)

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