Swagger2启动出现Unable to scan documentation context default解决方法-最有效

键盘敲爆

已于 2023-08-29 21:33:16 修改

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文章标签： java spring

于 2023-08-29 21:28:50 首次发布

本文链接：https://blog.youkuaiyun.com/weixin_52593564/article/details/132570320

版权

本文讨论了在启动时遇到的NullPointerException，涉及Swagger配置，给出了检查项目包路径和硬编码路径两种解决方案。

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吐槽一下，这个问题，卡了我好久，醉了，无语了

2023-08-29 21:11:36.438 ERROR 19400 --- [           main] d.s.w.p.DocumentationPluginsBootstrapper : Unable to scan documentation context default

java.lang.NullPointerException: null
	at java.lang.String.startsWith(String.java:1405) ~[na:1.8.0_161]
	at java.lang.String.startsWith(String.java:1434) ~[na:1.8.0_161]
	at springfox.documentation.builders.RequestHandlerSelectors$4.apply(RequestHandlerSelectors.java:98) ~[springfox-core-2.9.2.jar:null]
	at springfox.documentation.builders.RequestHandlerSelectors$4.apply(RequestHandlerSelectors.java:95) ~[springfox-core-2.9.2.jar:null]
	at com.google.common.base.Present.transform(Present.java:75) ~[guava-28.2-android.jar:na]
	at springfox.documentation.builders.RequestHandlerSelectors$5.apply(RequestHandlerSelectors.java:114) ~[springfox-core-2.9.2.jar:null]
	at springfox.documentation.builders.RequestHandlerSelectors$5.apply(RequestHandlerSelectors.java:111) ~[springfox-core-2.9.2.jar:null]
	at com.google.common.base.Predicates$AndPredicate.apply(Predicates.java:353) ~[guava-28.2-android.jar:na]
	at com.google.common.base.Predicates$AndPredicate.apply(Predicates.java:353) ~[guava-28.2-android.jar:na]
	at com.google.common.collect.Iterators$5.computeNext(Iterators.java:637) ~[guava-28.2-android.jar:na]
	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141) ~[guava-28.2-android.jar:na]
	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136) ~[guava-28.2-android.jar:na]
	at springfox.documentation.spring.web.scanners.ApiListingReferenceScanner.scan(ApiListingReferenceScanner.java:48) ~[springfox-spring-web-2.9.2.jar:null]
	at springfox.documentation.spring.web.scanners.ApiDocumentationScanner.scan(ApiDocumentationScanner.java:67) ~[springfox-spring-web-2.9.2.jar:null]
	at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.scanDocumentation(DocumentationPluginsBootstrapper.java:101) [springfox-spring-web-2.9.2.jar:null]
	at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start(DocumentationPluginsBootstrapper.java:167) [springfox-spring-web-2.9.2.jar:null]
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:182) [spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:53) [spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:360) [spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:158) [spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:122) [spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:894) [spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:162) [spring-boot-2.2.3.RELEASE.jar:2.2.3.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) [spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) [spring-boot-2.2.3.RELEASE.jar:2.2.3.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.3.RELEASE.jar:2.2.3.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.3.RELEASE.jar:2.2.3.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.3.RELEASE.jar:2.2.3.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.3.RELEASE.jar:2.2.3.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.3.RELEASE.jar:2.2.3.RELEASE]
	at com.by.AdminServiceApplication.main(AdminServiceApplication.java:13) [classes/:na]

解决方法

 d.s.w.p.DocumentationPluginsBootstrapper : Unable to scan documentation context default

法一：

检查自己的项目是否完整：
在这里插入图片描述
在swagger2 的配置中能看到

    @Bean
    public Docket docket() {
        Docket docket = new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(RequestHandlerSelectors.basePackage(swaggerProperties.getBasePackage()))
                //.apis(RequestHandlerSelectors.basePackage("com.by.controller"))
                .paths(PathSelectors.any())
                .build();

        //安全配置
        docket.securitySchemes(securitySchemes())//安全规则
                .securityContexts(securityContexts()); //安全配置的上下
        return docket;

    }

这个swaggerProperties.getBasePackage()是通过配置文件获取去的，可以这样配置：

swagger2:
    basePackage: com.by.controller

法二：
或者直接在swagger2的配置的时候把值写死，也就是我上面注释点的哪行代码

.apis(RequestHandlerSelectors.basePackage("com.by.controller"))