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mysql列存储表情字符串办法

mysql列存储表情字符串办法

作者: printf200 | 来源:发表于2019-05-07 13:19 被阅读0次

    https://www.cnblogs.com/lowwen/p/5645242.html

    问题描述:
    java.sql.SQLException: Incorrect string value: '\xF0\x9F\x90\xBB' for column 'nickName' at row 1
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1094)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4226)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4158)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2615)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2776)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2840)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2082)
    at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1302)
    at sun.reflect.GeneratedMethodAccessor49.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:55)
    at com.sun.proxy.$Proxy58.execute(Unknown Source)
    at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:41)
    at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:66)
    at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:45)
    at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:100)
    at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:75)
    解决方法:
    1.建表的时候添加如下限制:ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
    2.在my.cnf上修改如下:
    ------------------my.cnf------------------------------------------------------

    For advice on how to change settings please see

    http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html

    [client]
    default-character-set=utf8mb4
    [mysql]
    default-character-set = 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 = .....

    socket = .....

    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
    log-error=/var/log/mysqld.log
    long_query_time=3

    [mysqld]
    character-set-client-handshake = FALSE
    character-set-server = utf8mb4
    collation-server = utf8mb4_unicode_ci
    init_connect='SET NAMES utf8mb4'

    log-slow-queries= /usr/local/mysql/log/slowquery.log


    重启mysql服务,service mysql stop; service mysql start;问题解决。
    造成这个问题的原因(网上找的):
    mysql中规定utf8字符的最大字节数是3,但是某些unicode字符转成utf8编码之后有4个字节,导致出错。

    作者:豆约翰
    链接:https://www.jianshu.com/p/a8df78d7d5f0
    来源:简书
    简书著作权归作者所有,任何形式的转载都请联系作者获得授权并注明出处。

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