pycharm连接云端mysql

在阿里云上安装了一个mysql，打算用windows系统上面装的pycharm来操作

首先，右端有个database，点开它，点开加号

这里，general填的是mysql上面设置的密码，端口不用改了，都是3306，host也不用改，user写root，如果test connection是灰色的，点安装driver，pycharm会自己下载安装的

这里，SSH打钩，proxy host写服务器的地址，user写使用的root或者你的子用户，password是root或者子用户登录上云的密码

最后点test connection就完成了，如果防火墙申请权限，点允许

接下来是使用pycharm来操作mysql

点右上角的笔那里，打开控制台

现在我要创建一个新的数据库shop

点绿色的运行，看到下面终端显示已经创建了一个叫做shop的数据库

打开ssh窗口看看

百度经验里面的mysql和excel的互相转换，先存着https://jingyan.baidu.com/article/c910274bc36006cd361d2dfb.html

下面开始不要看了，我尝试了下面的方法都没有成功，最后想着开放数据库很不安全，就装了本地的数据库

----------------------------------------------------------------------------------------------我是一条分割线----------------------------------------------------------------------------------------------------------------

load data infile 'C:\\Users\\Desktop\\test.csv'
into table `paper`
fields terminated by ',' optionally enclosed by '"' escaped by '"'
lines terminated by '\n';

[2019-04-08 09:55:03] [08S01] Communications link failure
[2019-04-08 09:55:03] The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
[2019-04-08 09:55:03] java.net.ConnectException: Connection refused: connect

1.数据库授权

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'stenci/12' WITH GRANT OPTION;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.07 sec)

2.防火墙开放3306窗口

[root@izm5e47qpndp7jfqjxvf13z etc]# firewall-cmd --zone=public --add-port=3306/tcp --permanent
FirewallD is not running
[root@izm5e47qpndp7jfqjxvf13z etc]# telnet 192.168.1.211 3306
bash: telnet: command not found
#查看防火墙状态，发现是没有开启的（dead）
[root@izm5e47qpndp7jfqjxvf13z etc]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)
#开启防火墙
[root@izm5e47qpndp7jfqjxvf13z etc]# systemctl start firewalld
#查看防火墙状态，已经开启
[root@izm5e47qpndp7jfqjxvf13z etc]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: active (running) since Mon 2019-04-08 10:57:52 CST; 29s ago
     Docs: man:firewalld(1)
 Main PID: 2061 (firewalld)
    Tasks: 2
   Memory: 24.2M
   CGroup: /system.slice/firewalld.service
           └─2061 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid
#开启防火墙3306窗口，success
[root@izm5e47qpndp7jfqjxvf13z etc]# firewall-cmd --permanent --zone=public --add-port=3306/tcp
success
#重启防火墙服务
[root@izm5e47qpndp7jfqjxvf13z etc]# systemctl restart firewalld.service

https://www.cnblogs.com/kevingrace/p/5799210.html

https://blog.csdn.net/ldj0816/article/details/80270084

关闭默认firewall部署iptables

最后没有看到#SELINUX=enforcing所以没有注释

[root@izm5e47qpndp7jfqjxvf13z network-scripts]# yum install iptables-services
Loaded plugins: fastestmirror
Determining fastest mirrors
base                                                                                                                                       | 3.6 kB  00:00:00
docker-ce-stable                                                                                                                           | 3.5 kB  00:00:00
epel                                                                                                                                       | 4.7 kB  00:00:00
extras                                                                                                                                     | 3.4 kB  00:00:00
mysql-connectors-community                                                                                                                 | 2.5 kB  00:00:00
mysql-tools-community                                                                                                                      | 2.5 kB  00:00:00
mysql57-community                                                                                                                          | 2.5 kB  00:00:00
updates                                                                                                                                    | 3.4 kB  00:00:00
(1/4): extras/7/x86_64/primary_db                                                                                                          | 187 kB  00:00:00
(2/4): epel/x86_64/updateinfo                                                                                                              | 990 kB  00:00:00
(3/4): updates/7/x86_64/primary_db                                                                                                         | 3.4 MB  00:00:01
(4/4): epel/x86_64/primary_db                                                                                                              | 6.6 MB  00:00:01
Resolving Dependencies
--> Running transaction check
---> Package iptables-services.x86_64 0:1.4.21-28.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

==================================================================================================================================================================
 Package                                      Arch                              Version                                     Repository                       Size
==================================================================================================================================================================
Installing:
 iptables-services                            x86_64                            1.4.21-28.el7                               base                             52 k

Transaction Summary
==================================================================================================================================================================
Install  1 Package

Total download size: 52 k
Installed size: 26 k
Is this ok [y/d/N]: y
Downloading packages:
iptables-services-1.4.21-28.el7.x86_64.rpm                                                                                                 |  52 kB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : iptables-services-1.4.21-28.el7.x86_64                                                                                                         1/1
  Verifying  : iptables-services-1.4.21-28.el7.x86_64                                                                                                         1/1 

Installed:
  iptables-services.x86_64 0:1.4.21-28.el7                                                                                                                        

Complete!

首先考虑是不是3306没有开启，但是打开my.cnf后没有发现 bind-address = 127.0.0.1 这么一行，所以也不能改为 bind-address = 0.0.0.0

然后又考虑mysql驱动是不是有问题，把版本改为最早的5.1.35