Null pointer exception: java.lang.NullPointerException: null

The error message is as follows:

ERROR 22460 --- [nio-8082-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause

Encountered an error: Analysis of the access port
problem: There is a paged query written, but the method is only executed when querying, without adding page and limit
Solution: Add page and limit when accessing
Example: http://localhost:8082/select?page=1&limit=2