最近一段时间学习Django，在进行与MySQL数据联合使用的插入数据的时候遇到下边的问题：
/usr/local/lib/python2.7/dist-packages/Django-1.11.dev20170117002028-py2.7.egg/django/db/backends/mysql/base.py:109: Warning: Incorrect string value: '\xE6\x88\x90\xE5\x8A\x9F...' for column 'json' at row 1
return self.cursor.execute(query, args)
[07/Feb/2017 12:15:21] "GET /index/ HTTP/1.1" 200 250
中文无法插入MySQL数据库～！～！
查看数据库编码
mysql> show create database bangjob;
+----------+--------------------------------------------------------------------+
| Database | Create Database |
+----------+--------------------------------------------------------------------+
| bangjob | CREATE DATABASE `bangjob` /*!40100 DEFAULT CHARACTER SET latin1 */ |
+----------+--------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> show variables like'%char%';
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | latin1 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | latin1 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)
修改数据库编码
mysql> set character_set_database=utf8;
Query OK, 0 rows affected (0.00 sec)
mysql> set character_set_server=utf8;
Query OK, 0 rows affected (0.00 sec)
查看修改后的结果
mysql> show variables like'%char%';
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)
这时候继续插入就没有任何问题了。
如果真的是这样简单就好了，因为这样的修改作者在重启MySQL的后设置失效！！！
继续寻找其它方法
sudo gedit /etc/mysql/my.cnf
在my.cnf文件的对应节点添加一下信息：
[client]
default-character-set=utf8
[mysqld]
default-character-set=utf8
[mysql]
default-character-set=utf8
然后重启MySQL：
/etc/init.d/mysql start
如果能重启那么再次查看数据库编码：
mysql> show variables like "%char%";
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.01 sec)
如果真的时这样就好了，事情的发生总是不像想象的那么简单：
在重启MySQL服务的时候发现一直处于等待状态（PS：猜测发生了死锁什么的），这个时候执行mysql -u root -p则会抛出异常ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)。
我就是想修改一下编码而已，为什么这么苦->->->->->!!!
解决这个问题的时候试过好多方法（重启，恢复）。。。。。
sudo /etc/init.d/mysql status
查看mysql的状态：mysql respawn/post-start, (post-start) process 55665
这些方式不能解决问题，还是从日志开始吧...
找到日至文件 /var/log/mysql/error.log
继续找ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)的解决办法。
答案：
[ mysqld ] 下的 default-character-set=utf8' 改成
character_set_server=utf8
好了，终于可以重启MySQL了，并且重启后设置的编码依旧生效（当然之前创建的数据库需要重新创建T_T）。
