If you accidentally lose the primary key and need to modify the id column of the table as the primary key, you can use the following SQL statement
JSTL format timestamp, for example, how can 1444226313 be displayed as 2015/10/7 21:58:33?
How to solve tomcat exception error:
java.lang.IllegalArgumentException: Invalid character found in the request target. The valid characters are defined in RFC 7230 and RFC 3986
In a distributed system, how to solve the unique sequence problem, how to solve the duplication id problem, there are currently many algorithms can be solved, today we introduce a classic solution: Twitter SnowFlake