作者:推广中医 | 来源:互联网 | 2023-01-17 17:04
Causedby:java.sql.SQLException:Incorrectstringvalue:\xF0\x9F\x98\x84forcolumnNickNameatrow
Caused by: java.sql.SQLException: Incorrect string value: '\xF0\x9F\x98\x84' for column 'NickName' at row 1
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2734)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2458)
UTF-8编码有可能是两个、三个、四个字节。Emoji表情是4个字节,而Mysql的utf8编码最多3个字节,所以数据插不进去。
解决方法:
1、修改mysql配置文件my.ini
找到配置文件是关键,可在window服务找到mysql的服务,右键属性查看,如图:
打开配置文件,在响应的节点追加以下内容:
[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'
2、修改数据库及表结构,命令行如下:
ALTER DATABASE ‘database’ CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;
ALTER TABLE 'tablename' CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ALTER TABLE 'tablename' modify 'columnName' text CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
3、修改java程序中的数据库连接字符串,不要设置 characterEncoding,设置autoRecOnnect=true,连接串如下:
jdbc:mysql://127.0.0.1:3306/dbname?useUnicode=true&autoRecOnnect=true&allowMultiQueries=true
4、最后一步,重启mysql数据库,重启web服务器。
ok,搞定!