mysql 字符集转换

<pre name="code" class="html">Java代码
java.sql.SQLException: Incorrect string value: '\xF0\x9F\x92\x94' for column 'name' 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)

1. 修改my.cnf
[mysqld]
character-set-server=utf8mb4
[mysql]
default-character-set=utf8mb4
修改后重启Mysql

3. 将已经建好的表也转换成utf8mb4
ALTER TABLE UserInfo  CHARSET=utf8mb4;

命令：alter table TABLE_NAME convert to character set utf8mb4 collate utf8mb4_bin; （将TABLE_NAME替换成你的表名）