Resolved [org.springframework.web.method.annotation.MethodArgumentTypeMismatchException: Failed to convert value of type ‘java.lang.String’ to required type ‘java.lang.Integer’; nested exception is java.lang.NumberFormatException: For input string: “50.5”]

General meaning:
failed to convert the value of type “Java. Lang. string” to the required type “Java. Lang. integer”; Nested exception is java.lang.numberformatexception: for input string: “50.5”]

This kind of error is usually caused by the parameters passed by the front end and the failure of the back end parsing, that is, it is wearing illegal parameters. For example, the upper front end gives me a floating point number, and the back end will fail when the string is parsed into a number!