+--------------------------+----------------------------+

修改为utf8编码：修改/etc/my.cnf
在[client]下增加default-character-set=utf8
在[mysqld]下增加character_set_server=utf8
重新查看编码情况：
mysql> show variables like character%;
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | utf8                       |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                       |
| character_set_server     | utf8                       |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
如此修改后，JDBC访问不会出现乱码。
注意JSP页面编码也要写成UTF-8.