数据库保存Packet for query is too large

异常如下所示：
Packet for query is too large (1238 > 1024). You can change this value on the server by setting the max_allowed_packet' variable.
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3683) ~[mysql-connector-java-5.1.47.jar:5.1.47]

修改my.cnf文件在[mysqld]下添加配置就可以了
max_allowed_packet = 100M

1.这个报错可能是你做批量操作的条数较多，导致报文超过MySQL最大允许报文长度
可以参考这个 https://blog.csdn.net/xiaobai_along/article/details/121474387