python连接数据库。

准备工作。需要安装pymssql 。。具体怎么安装请自行百度。教程很多。最简单的就是pip install myssql  但是可能会出现版本不兼容的问题。导致导入后不能improt。也可能导致打包的时候出错。

需要三个文件。

1.解析配置文件，连接数据库

# -*- coding: utf-8 -*-
__author__ = ‘hero‘
import pymssql
import xml.dom.minidom
import os
import sys
curPath = os.path.abspath(os.path.dirname(__file__))
rootPath = os.path.split(curPath)[0]
sys.path.append(rootPath)
class ExchangeData(object):
    global CONFIGTYPE_RETEST
    global CONFIGTYPE_PING
    global CONFIGTYPE_AGETEST
    global CONFIGTYPE_IPX

    CONFIGTYPE_RETEST = ‘RETEST‘
    CONFIGTYPE_PING = ‘PING‘
    CONFIGTYPE_AGETEST = ‘AGETEST‘
    CONFIGTYPE_IPX = ‘IPX‘

    ###加载数据库连接数据
    def loadDBConfig(self,dbType):
        xmlDoc = xml.dom.minidom.parse(os.getcwd() +‘\\conf\\/DBConfig.xml‘#此处路径为配置文件的路径
        root = xmlDoc.documentElement
        sql_element = root.getElementsByTagName(dbType)[0]
        return sql_element

    def __exchangeDataByDBConnection(self):
        sqlInfo = self.loadDBConfig(‘MSSQL‘)
        db_host = sqlInfo.getElementsByTagName(‘HOST‘)[0].firstChild.data
        db_database = sqlInfo.getElementsByTagName(‘DATABASE‘)[0].firstChild.data
        db_user = sqlInfo.getElementsByTagName(‘USERNAME‘)[0].firstChild.data
        db_pwd = sqlInfo.getElementsByTagName(‘PASSWORD‘)[0].firstChild.data
        conn = pymssql.connect(user=db_user,password=db_pwd,database=db_database,host=db_host)
        conn.autocommit(True)
        return conn

    ###读取数据###
    def getDataBySql(self,sqlStr):
        try:
            conn = self.__exchangeDataByDBConnection()
            if not conn:
                raise(NameError,‘数据库连接失败‘)
            else:
                cur = conn.cursor()
                cur.execute(sqlStr)
                resList = cur.fetchall()
                conn.close()
                return resList
        except Exception,e:
            print(e)
            raise(NameError,‘数据库操作失败‘)

    ###更改数据库###
    def setDataBySql(self,sqlStr):
        try:
            conn = self.__exchangeDataByDBConnection()
            if not conn:
                raise(NameError,‘数据库连接失败‘)
                return False
            else:
                cur = conn.cursor()
                cur.execute(sqlStr)
                conn.commit()
                conn.close()
                return True
        except Exception,e:
            print(e)
            raise(NameError,‘数据库操作失败‘)
            return False

if __name__ == ‘__main__‘:
    pn = ‘BYAUX-CTN0003‘
    sqlStr = "select * from producttype where productNo = ‘"+pn+"‘"
    edata = ExchangeData()
    resList = edata.getDataBySql(sqlStr=sqlStr)
    for dataRow in resList:
        print(dataRow[0])

2.进行增删改查操作，文件

  1 #coding=gbk
  2
  3 from exchangeData import *
  4 import time
  5
  6 ###数据库相关操作
  7 class DataBaseOP(object):
  8     ###根据用户名密码，验证用户权限返回值不同，权限不同###
  9     def loginApTester(self,username,password):
 10         loginSql = ‘SELECT rid FROM bdcomemployee WHERE bdcomLoginName = \‘‘+username+‘\‘ AND bdcomPassword = \‘‘+password+‘\‘‘
 11         loginSql = self.dbTrim(loginSql)
 12         eData = ExchangeData()
 13         dataRows = eData.getDataBySql(loginSql)
 14         if len(dataRows)==0 or dataRows[0] is None:
 15             return 0
 16         elif dataRows[0][0]==17:
 17             return 2
 18         else:
 19             return 1
 20
 98
127     ###修改密码###
128     def resetDBPwd(self,userName,oldPwd,newPwd):
129         igStatus = self.loginApTester(userName,oldPwd)
130         if igStatus>0:
131             setSql = ‘UPDATE bdcomemployee SET bdcomPassword = \‘‘+newPwd+‘\‘ WHERE bdcomLoginName = \‘‘+userName+‘\‘ AND bdcomPassword = \‘‘+oldPwd+‘\‘‘
132             self.dbTrim(setSql)
133             eData = ExchangeData()
134             return eData.setDataBySql(setSql)
135         else:
136             return False;
137
138
139
155   169
170     def dbTrim(self,trimStr):
171         return str(trimStr).replace(‘\t‘,‘‘).replace(‘\n‘,‘‘).replace(‘\r‘,‘‘)
172
173 if __name__ == ‘__main__‘:
174     dbop = DataBaseOP()
175     dbop.loginApTester(‘liuke_ap‘,‘liuke‘)

3.配置文件

1 <?xml version="1.0" encoding="UTF-8"?>
2 <JDBC>
3     <MSSQL>
4         <HOST>192.168.1.1</HOST>
5         <DATABASE>abcd</DATABASE>
6         <USERNAME>root</USERNAME>
7         <PASSWORD>root</PASSWORD>
8     </MSSQL>
9 </JDBC>