[MySQL]报错：java.sql.SQLException:

问题原因

MySQL's utf8
only supports basic multilingual plane, and you need to use utf8mb4
instead:

解决方法

1. 建表的时候添加如下限制：ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
2. 在my.cnf上修改如下：

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
[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'

# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
 
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
# server_id = .....
# socket = .....
 
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
 
#log-slow-queries= /usr/local/mysql/log/slowquery.log

3. 重启mysql服务。备注：官方说不需要重启mysql，但只有重启才可以。

参考资料

1. https://stackoverflow.com/questions/13653712/java-sql-sqlexception-incorrect-string-value-xf0-x9f-x91-xbd-xf0-x9f
2. http://www.cnblogs.com/lowwen/p/5645242.html