mysql保存不了微信表情符emoji问题解决方案

问题描述：

当微信昵称中有emoji表情符时，mysql数据库报更新异常：

java.sql.SQLException: Incorrect string value: '\xF0\x9F\x92\x94' for colum n 'nickname' at row 1

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3593)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3525)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1986)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2140)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2620)

at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1662)

at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1581)

原因分析：这是由于mysql所设置的字符集不支持utf8mb4导致。

解决办法：

一、修改mysql server

改配置文件/etc/my.cnf（window为my.ini）

[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'

注意：mysql支持utf8mb4的版本是5.5.3+，必须升级到较新版本

查看版本：SHOW VARIABLES WHERE Variable_name LIKE ‘version%’;

执行数据库和表、字段的字符集sql:

ALTER DATABASE t_yown_userdb CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;

ALTER TABLE t_yown_user CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

alter table t_yown_user modify `NICKNAME` varchar(80) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci COMMENT '昵称';

重启mysql:

service mysqld stop

service mysqld start

检验是否修改好：

SHOW VARIABLES WHERE Variable_name LIKE ‘character_set_%’ OR Variable_name LIKE ‘collation%’

查询结果如下(所有结果集utf8mb4)：

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

character_sets_dir    /usr/share/mysql/charsets/

collation_connection    utf8mb4_general_ci

collation_database    utf8mb4_unicode_ci

collation_server    utf8mb4_unicode_ci

二、确认mysql驱动、连接串：

确保mysql connection版本高于5.1.13否则仍然不能试用utf8mb4

确认连接串 jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/t_yown_userdb?useUnicode=true&characterEncoding=utf8&autoReconnect=true&rewriteBatchedStatements=TRUE

最后最好重启应用程序，祝顺利！