大家好，我是考100分的小小码 ，祝大家学习进步，加薪顺利呀。今天说一说java.sql.SQLException: Unknown initial character set index ‘255’ received from server. Initial client character set can be forced via the ‘characterEncoding’ property.解决方案,希望您对编程的造诣更进一步.
![java.sql.SQLException: Unknown initial character set index '255' received from server. Initial client character set can be forced via the 'characterEncoding' property.解决方案[数据库教程]](/www.yht7.com/upload/image/images/imgsql/9.jpg "java.sql.SQLException: Unknown initial character set index ‘255’ received from server. Initial client character set can be forced via the ‘characterEncoding’ property.解决方案插图")
描述：java项目连mysql时报错“java.sql.SQLException: Unknown character set index for field ‘255‘ received from server”
原因：这是编码不匹配的原因，MySQL驱动和数据库字符集设置不搭配，默认字符集已从latin1变成utf8mb4，因而系统变量受到影响
解决：直接在连接的URL后加上
useUnicode=true&characterEncoding=utf8
就可以了。
或者直接升级jar包！！
java.sql.SQLException: Unknown initial character set index ‘255’ received from server. Initial client character set can be forced via the ‘characterEncoding’ property.解决方案
原文地址：https://www.cnblogs.com/xuyupengblogs/p/12951538.html
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