问题描述

2022-08-09 08:56:12.115 ERROR 11332 — [nio-8080-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.ClassCastException: class java.lang.String cannot be cast to class java.lang.Long (java.lang.String and java.lang.Long are in module java.base of loader ‘bootstrap’)] with root cause

java.lang.ClassCastException: class java.lang.String cannot be cast to class java.lang.Long (java.lang.String and java.lang.Long are in module java.base of loader ‘bootstrap’)

问题原因

String ticketAmountKey = "ticketAmount " + sellTicket.getTicketID();

这行可以看到。
用来查找的key里面带了空格。

解决方案

将空格改成冒号等