最近一段時間學習Django，在進行與MySQL數據聯合使用的插入數據的時候遇到下邊的問題：
/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
中文無法插入MySQL數據庫～！～！
查看數據庫編碼
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)
修改數據庫編碼
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)
查看修改后的結果
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)
這時候繼續插入就沒有任何問題了。
如果真的是這樣簡單就好了，因為這樣的修改作者在重啟MySQL的后設置失效?。?！
繼續尋找其它方法
sudo gedit /etc/mysql/my.cnf
在my.cnf文件的對應節點添加一下信息：
[client]
default-character-set=utf8
[mysqld]
default-character-set=utf8
[mysql]
default-character-set=utf8
然后重啟MySQL：
/etc/init.d/mysql start
如果能重啟那么再次查看數據庫編碼：
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)
如果真的時這樣就好了，事情的發生總是不像想象的那么簡單：
在重啟MySQL服務的時候發現一直處于等待狀態（PS：猜測發生了死鎖什么的），這個時候執行mysql -u root -p則會拋出異常ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)。
我就是想修改一下編碼而已，為什么這么苦->->->->->!!!
解決這個問題的時候試過好多方法（重啟，恢復）。。。。。
sudo /etc/init.d/mysql status
查看mysql的狀態：mysql respawn/post-start, (post-start) process 55665
這些方式不能解決問題，還是從日志開始吧...
找到日至文件 /var/log/mysql/error.log
繼續找ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)的解決辦法。
答案：
[ mysqld ] 下的 default-character-set=utf8' 改成
character_set_server=utf8
好了，終于可以重啟MySQL了，并且重啟后設置的編碼依舊生效（當然之前創建的數據庫需要重新創建T_T）。
