Java production [The number of SMS verification codes for your IP application has reached the upper limit]

Every time a user applies, he first judges whether the upper limit has been reached, and then inserts the record of the current IP time into the database.

You can write a scheduled task to clean the table once a day.

Every time you load a page, check the time of the IP today and put it on the page. If the application is successful, he will add it up and make a judgment directly, thus reducing the number of times to query the database.