In state mode, how to avoid the problem of class inflation?

when reading the design pattern of the Zen state pattern of the design pattern, why do you mention that the disadvantage of the state pattern is that there are too many subclasses, which will cause class expansion? is there any way to solve this problem?
the author also mentioned setting up a state table in the database. What is the specific idea?

Java design-pattern

Apr.02,2021

Previous: According to the browser adaptive div height, after I set the height to a percentage, it is still invalid

Next: Browser request timeout resend

Java abstract methods and interface implementation calls?
there are methods in the interface: after() before() doInit() when calling, I want to call the above three methods in this method by calling a method execute () . How should I design the class? there are two ways of thinking now: Add a method to...

Java Design-pattern Interface

Mar.01,2021

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b30cc4-4e9a9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b30cc4-4e9a9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?