| Variable_name | Value |
|---|---|
| character_set_client | utf8mb4 |
| character_set_connection | utf8mb4 |
| character_set_database | utf8mb4 |
| character_set_filesystem | binary |
| character_set_results | utf8mb4 |
| character_set_server | utf8mb4 |
| character_set_system | utf8 |
| collation_connection | utf8mb4_unicode_ci |
| collation_database | utf8mb4_unicode_ci |
| collation_server | utf8mb4_unicode_ci |
collation_connection 、collation_database 、collation_server是什么沒關系。
但必須保證
| 系統變量 | 描述 |
|---|---|
| character_set_client | (客戶端來源數據使用的字符集) |
| character_set_connection | (連接層字符集) |
| character_set_database | (當前選中數據庫的默認字符集) |
| character_set_results | (查詢結果字符集) |
| character_set_server | (默認的內部操作字符集) |
這幾個變量必須是utf8mb4。
5. 數據庫連接的配置
數據庫連接參數中:
characterEncoding=utf8會被自動識別為utf8mb4，也可以不加這個參數，會自動檢測。
而autoReconnect=true是必須加上的。
6. 將數據庫和已經建好的表也轉換成utf8mb4
更改數據庫編碼：
更改表編碼：
如有必要，還可以更改列的編碼
7、在第3步設置character_set_database，character_set_server不成功的可以試下直接在mysql.exe下
set @@character_set_server='utf8mb4'; set @@character_set_database='utf8mb4';
這下數據庫就可以存下emoji表情的編碼了。
附上我的my.ini
# For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html # *** DO NOT EDIT THIS FILE. It's a template which will be copied to the # *** default location during install, and will be replaced if you # *** upgrade to a newer version of MySQL. [client] default-character-set = utf8mb4 [mysql] default-character-set = utf8mb4 [mysqld] character-set-client-handshake = FALSE character-set-server = utf8mb4 collation-server = utf8mb4_unicode_ci init_connect='SET NAMES utf8mb4' # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. # innodb_buffer_pool_size = 128M # Remove leading # to turn on a very important data integrity option: logging # changes to the binary log between backups. # log_bin # These are commonly set, remove the # and set as required. # basedir = ..... # datadir = ..... # port = ..... # server_id = ..... # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # sort_buffer_size = 2M # read_rnd_buffer_size = 2M sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
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