documentationPluginsBootstrapper【已解决】

springboot整合swagger时出现了此问题

2022-03-10 09:13:50.929 ERROR 24756 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.3.16.jar:5.3.16]

1 降低springboot的版本，降到2.6以下，比如2.5.10

2 加上@EnableWebMvc注解

3 实体嵌套异常，比如a中有b， b中也有a