Unknown initial character set index '255' received from server. Initial client character. 解决方案

原因：

  MySQL驱动和数据库字符集设置不搭配

修改连接字符串为

Connection connection = null; // 后续捕获异常
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/maven?useUnicode=true&characterEncoding=utf8", "账号", "密码");

列出我出错的语句（未匹配数据库字符集）：

Connection connection = null; // 后续捕获异常
connection = DriverManager.getConnection("jdbc:mysql:///maven","root", "root");

要访问的数据库名：maven

账号：root

密码：root

请对照自己的修改