MySQL解决方案

目录

 

 

Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj....

总体概括就是两个异常:

1. Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.

原因:加载类'com.mysql.jdbc.Driver' 已经过时了。新的驱动类是“com.mysql.cj.jdbc.Driver”。驱动程序通过SPI自动注册,而手动加载类通常是不必要的。、

解决方法:1. 使用8.0.13版本的驱动 2.将驱动 com.mysql.jdbc.Driver  改为  com.mysql.cj.jdbc.Driver

jdbc.driver=com.mysql.cj.jdbc.Driver

2. The server time zone value '???ú±ê×??±??' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support. 

原因:服务器时区值“????±××?±?无法识别或代表一个以上的时区。如果希望利用时区支持,则必须配置服务器或JDBC驱动程序(通过serverTimezone配置属性)以使用更具体的时区值。

解决方案:jdbc.url 加上   characterEcoding=utf-8&useSSL=false&serverTimezone=UTC&rewriteBatchedStatements=true

jdbc:mysql://127.0.0.1:3306/xxx?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8

 

项目启动报错The server time zone value '�й���׼ʱ��' is unrecognize

报错The server time zone value '�й���׼ʱ��' is unrecognized or represents more than one time zone. You must...

    原因是使用了Mysql Connector/J 6.x以上的版本,然后就报了时区的错误,解决方法:

    在配置url的时候不能简单写成 :

    jdbc:mysql://localhost:3306/yzu?serverTimezone=UTC

    而是要写成 :

    jdbc:mysql://localhost:3306/yzu?serverTimezone=UTC

  

Python之MySQLdb

MySQLdb是用于Python链接Mysql数据库的接口,它实现了Python数据库API规范V2.0,基于MySql C API上建立的。

  1. MySQLdb安装

    (1)安装Mysql,参考上篇博客数据库之MySql

    (2)使用pip安装MySQLdb:pip install MySQL-python

        但是安装的时候会报错:error: command 'C:\\Program Files\\Microsoft Visual Studio 14.0\\VC\\BIN\\cl.exe' failed with exit status 2

        下面推荐两种方法进行解决:

         a. 下载Python-3.5及上版本扩展的mysql驱动:https://pypi.python.org/pypi/mysqlclient/1.3.10

             之后将下载后的*.whl文件跟pip.exe放在同个目录(一般是在 ..\Python36\Scripts\ 里)

        然后用cmd命令进入到这个目录执行PIP命令安装:pip install mysqlclient-1.3.10-cp36-cp36m-win32.whl 

       b. 安装pymysql代替:pip install pymysql 

注:以上安装方法内容来自原文https://www.cnblogs.com/bu1tcat/p/8283742.html     

  2. MySQLdb实例

复制代码
#coding=utf-8

import sys
import MySQLdb as db
import csv

def parse_csv(csvfile):
    with open(csvfile, 'r') as pf:
        reader = csv.reader(pf, delimiter=',')
        header = next(reader)
        csvdata = []
        for row in reader:
            csvdata.append(row)
    return header, csvdata        
        
    
#链接数据库
def mysqldb_operator(data):
    conn = db.connect(host="localhost", user="root", passwd="", db="xbqr", charset="utf8")
    print (conn)
    print ("datebase connect success!")
    curs = conn.cursor()
    #创建表之前先删除表
    curs.execute("drop table IF EXISTS table_xbqr")
    conn.commit()
    #创建表
    query = "create table table_xbqr(\
        SupplierName VARCHAR(32),\
        InvoiceNumber VARCHAR(32),\
        PartNumber VARCHAR(32),\
        Cost VARCHAR(32),\
        PurchaseDate DATE)"
    curs.execute(query)
    conn.commit()
    for row in data:
        curs.execute("INSERT INTO table_xbqr VALUES(%s,%s,%s,%s,%s);", row)
        conn.commit()
    curs.execute("select * from table_xbqr")
    conn.commit()
    selectdata = curs.fetchall()
    print (selectdata)

if __name__ == "__main__":
    csvfile = sys.argv[1]
    print ("csv file name:", csvfile)
    header, data = parse_csv(csvfile)
    print ("header:")
    print (header)
    print ("csvdata:")
    print (data)
    mysqldb_operator(data)
复制代码

 

posted on 2020-12-14 11:43  Debug的杰兄  阅读(101)  评论(0编辑  收藏  举报

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