Failed to start bean ‘documentationPluginsBootstrapper’； nested exception is java.lang.NullPointerEx

项目场景：

springboot 集成Swagger2启动报错

Failed to start bean ‘documentationPluginsBootstrapper’; nested exception is java.lang.NullPointerException

问题描述

org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException

原因分析：

Springboot2.6以后将SpringMVC 默认路径匹配策略从AntPathMatcher 更改为PathPatternParser，导致出错

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解决方案：

在配置文件application.properties中加入以下配置

spring.mvc.pathmatch.matching-strategy=ANT_PATH_MATCHER

如果是application.yml就加入

spring:
  mvc:
    pathmatch:
      matching-strategy: ant_path_matcher