今天切换springcurity框架时，出现了bug

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-5.3.23.jar:5.3.23]
at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.23.jar:5.3.23]
at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.23.jar:5.3.23]
at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_131]

主要原因就是版本不匹配

因为Springfox使用的路径匹配是基于AntPathMatcher的，而Spring Boot 2.6.X使用的是PathPatternMatcher

解决：在application.properties里配置
spring.mvc.pathmatch.matching-strategy=ANT_PATH_MATCHER

如果还是这个报错，就证明了其他依赖了springboot的版本也大于2.6.x，我们配置不了配置文件，

所以我们可以更换版本，注意springcloud版本也要换不然对应不上

<spring-boot.version>2.3.7.RELEASE</spring-boot.version>
<spring-cloud.version>Hoxton.SR9</spring-cloud.version>
<spring-cloud-alibaba.version>2.2.6.RELEASE</spring-cloud-alibaba.version>

这个版本还要把loadbalancer注释掉

<!--        &lt;!&ndash;解决：Did you forget to include spring-cloud-starter-loadbalancer?&ndash;&gt;-->
<!--        <dependency>-->
<!--            <groupId>org.springframework.cloud</groupId>-->
<!--            <artifactId>spring-cloud-loadbalancer</artifactId>-->
<!--            <version>3.1.6</version>-->
<!--        </dependency>-->

或者换成对应版本

<!--解决：Did you forget to include spring-cloud-starter-loadbalancer?-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-loadbalancer</artifactId>
    <version>${spring-cloud-alibaba.version}</version>
</dependency>