跟着B站一个up主的视频做Spring boot项目时遇到的问题

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause

java.lang.NullPointerException: null

for循环外面套一个判断 if(cookies != null){循环逻辑}