一直用oracle，好久没有用mysql，今天搭建了一个mysql的web开发环境。竟然抛出这个异常：
Unknown character set: ‘utf8mb4‘ org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown character set: ‘utf8mb4‘ at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80) at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:382) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:456) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:464) at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:472) at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:477) at org.springframework.jdbc.core.JdbcTemplate.queryForInt(JdbcTemplate.java:486)
记得创建数据的时候字符集设置的是utf-8:
CREATE DATABASE service DEFAULT CHARACTER SET utf8;
网上查了各种解决办法：
最后是由于Mysql驱动版本引起的：
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
换成
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.18</version>
</dependency>
结果不行，
换成下面的maven依赖问题解决，
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
搞死人...
时间： 2025-01-07 04:14:14