目录
不兼容报错提醒
1. 修改Spring Boot版本
2. 修改application.yml配置文件
3. 使用其他替代方案
依赖兼容
配置 Yaml 文件
依赖报错提醒
解决方法
1. 选择一个库
2. 移除springfox依赖
3. 添加springdoc依赖
4. 配置springdoc
5. 清理项目
6. 启动项目
示例代码
application.yml配置
pom.xml依赖
SwaggerConfig配置类（可选）
无法显示swagger页面
1. 检查依赖是否正确加载
2. 检查Spring Boot的静态资源路径
3. 检查Swagger UI的路径
4. 检查是否有其他Spring Security配置
5. 检查是否有其他Servlet或DispatcherServlet配置
6. 检查是否有其他静态资源冲突
7. 检查是否有其他中间件或代理配置
8. 检查日志输出
9. 尝试访问其他Swagger UI路径
10. 检查是否有其他错误
不兼容报错提醒
org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerExceptionat 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.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.23.jar:5.3.23]at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.23.jar:5.3.23]at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.23.jar:5.3.23]at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.23.jar:5.3.23]at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.13.jar:2.6.13]at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:745) ~[spring-boot-2.6.13.jar:2.6.13]at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:420) ~[spring-boot-2.6.13.jar:2.6.13]at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.6.13.jar:2.6.13]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1317) ~[spring-boot-2.6.13.jar:2.6.13]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.6.13.jar:2.6.13]at com.jkglxt.www.HealthManagementSystemApplication.main(HealthManagementSystemApplication.java:12) ~[classes/:na]
Caused by: java.lang.NullPointerException: nullat springfox.documentation.spring.web.WebMvcPatternsRequestConditionWrapper.getPatterns(WebMvcPatternsRequestConditionWrapper.java:56) ~[springfox-spring-webmvc-3.0.0.jar:3.0.0]at springfox.documentation.RequestHandler.sortedPaths(RequestHandler.java:113) ~[springfox-core-3.0.0.jar:3.0.0]at springfox.documentation.spi.service.contexts.Orderings.lambda$byPatternsCondition$3(Orderings.java:89) ~[springfox-spi-3.0.0.jar:3.0.0]at java.base/java.util.Comparator.lambda$comparing$77a9974f$1(Comparator.java:469) ~[na:na]at java.base/java.util.TimSort.countRunAndMakeAscending(TimSort.java:355) ~[na:na]at java.base/java.util.TimSort.sort(TimSort.java:234) ~[na:na]at java.base/java.util.Arrays.sort(Arrays.java:1515) ~[na:na]at java.base/java.util.ArrayList.sort(ArrayList.java:1750) ~[na:na]at java.base/java.util.stream.SortedOps$RefSortingSink.end(SortedOps.java:392) ~[na:na]at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:na]at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:na]at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:na]at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:na]at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485) ~[na:na]at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[na:na]at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) ~[na:na]at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na]at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) ~[na:na]at springfox.documentation.spring.web.plugins.WebMvcRequestHandlerProvider.requestHandlers(WebMvcRequestHandlerProvider.java:81) ~[springfox-spring-webmvc-3.0.0.jar:3.0.0]at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) ~[na:na]at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) ~[na:na]at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[na:na]at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[na:na]at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) ~[na:na]at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na]at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) ~[na:na]at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.withDefaults(AbstractDocumentationPluginsBootstrapper.java:107) ~[springfox-spring-web-3.0.0.jar:3.0.0]at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.buildContext(AbstractDocumentationPluginsBootstrapper.java:91) ~[springfox-spring-web-3.0.0.jar:3.0.0]at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.bootstrapDocumentationPlugins(AbstractDocumentationPluginsBootstrapper.java:82) ~[springfox-spring-web-3.0.0.jar:3.0.0]at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start(DocumentationPluginsBootstrapper.java:100) ~[springfox-spring-web-3.0.0.jar:3.0.0]at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.23.jar:5.3.23]... 14 common frames omitted你遇到的Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException错误，通常是由于Spring Boot版本与Swagger版本不兼容导致的。以下是一些解决方案：
1. 修改Spring Boot版本
降低你的Spring Boot版本到2.5及以下，就不再会出现上述的问题。
2. 修改application.yml配置文件
在application.yml文件中添加以下配置，以解决Spring Boot 2.6.x版本与Swagger 3.0.0的兼容性问题：
spring:mvc:pathmatch:matching-strategy: ant_path_matcher如果使用的是application.properties文件，则添加以下配置：
spring.mvc.pathmatch.matching-strategy=ant_path_matcher3. 使用其他替代方案
可以考虑使用springdoc-openapi-ui作为替代方案。它是一个基于Spring Boot的OpenAPI实现，与Spring Boot 2.6.x和3.x版本兼容性较好。在pom.xml中添加以下依赖：
依赖兼容
依赖二选一即可
<!-- 生成接口文档-->
<!-- <dependency>-->
<!-- <groupId>io.springfox</groupId>-->
<!-- <artifactId>springfox-boot-starter</artifactId>-->
<!-- <version>3.0.0</version>-->
<!-- </dependency>--><dependency><groupId>org.springdoc</groupId><artifactId>springdoc-openapi-ui</artifactId><version>1.6.11</version></dependency><dependency>
配置 Yaml 文件
springdoc:swagger-ui:path: /swagger-ui.html
spring:mvc:static-path-pattern: /**pathmatch:matching-strategy: ant_path_matcher依赖报错提醒
java.lang.IllegalStateException: Ambiguous handler methods mapped for '/v3/api-docs': {public org.springframework.http.ResponseEntity springfox.documentation.oas.web.OpenApiControllerWebMvc.getDocumentation(java.lang.String,javax.servlet.http.HttpServletRequest), public java.lang.String org.springdoc.webmvc.api.OpenApiWebMvcResource.openapiJson(javax.servlet.http.HttpServletRequest,java.lang.String,java.util.Locale) throws com.fasterxml.jackson.core.JsonProcessingException}at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.lookupHandlerMethod(AbstractHandlerMethodMapping.java:432) ~[spring-webmvc-5.3.23.jar:5.3.23]at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:383) ~[spring-webmvc-5.3.23.jar:5.3.23]at org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.getHandlerInternal(RequestMappingInfoHandlerMapping.java:125) ~[spring-webmvc-5.3.23.jar:5.3.23]at org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.getHandlerInternal(RequestMappingInfoHandlerMapping.java:67) ~[spring-webmvc-5.3.23.jar:5.3.23]at org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler(AbstractHandlerMapping.java:498) ~[spring-webmvc-5.3.23.jar:5.3.23]at org.springframework.web.servlet.DispatcherServlet.getHandler(DispatcherServlet.java:1265) ~[spring-webmvc-5.3.23.jar:5.3.23]at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1047) ~[spring-webmvc-5.3.23.jar:5.3.23]at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:964) ~[spring-webmvc-5.3.23.jar:5.3.23]at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.23.jar:5.3.23]at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.23.jar:5.3.23]at javax.servlet.http.HttpServlet.service(HttpServlet.java:670) ~[tomcat-embed-core-9.0.68.jar:4.0.FR]at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.23.jar:5.3.23]at javax.servlet.http.HttpServlet.service(HttpServlet.java:779) ~[tomcat-embed-core-9.0.68.jar:4.0.FR]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.68.jar:9.0.68]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.23.jar:5.3.23]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar:5.3.23]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.23.jar:5.3.23]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar:5.3.23]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.23.jar:5.3.23]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar:5.3.23]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1789) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.68.jar:9.0.68]at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]这个错误表明在你的Spring Boot项目中，/v3/api-docs 路径被多个处理器方法映射，导致了冲突。这通常是由于同时引入了 springfox 和 springdoc 两个库，它们都试图处理这个路径，从而导致了冲突。
解决方法
1. 选择一个库
建议选择一个库来生成API文档。springdoc 是目前更推荐的库，因为它与Spring Boot 2.6.x和3.x版本的兼容性更好。
2. 移除springfox依赖
<dependency><groupId>io.springfox</groupId><artifactId>springfox-boot-starter</artifactId><version>3.0.0</version>
</dependency>3. 添加springdoc依赖
在pom.xml中添加springdoc的依赖：
<dependency><groupId>org.springdoc</groupId><artifactId>springdoc-openapi-ui</artifactId><version>1.6.11</version>
</dependency>4. 配置springdoc
在application.yml或application.properties中添加以下配置，以解决Spring Boot 2.6.x版本与springdoc的兼容性问题：
spring:mvc:pathmatch:matching-strategy: ant_path_matcher或者在application.properties中：
spring.mvc.pathmatch.matching-strategy=ant_path_matcher5. 清理项目
清理并重新构建项目，以确保所有依赖都正确加载：
mvn clean install6. 启动项目
启动项目后，访问 http://localhost:8080/swagger-ui/index.html，你应该能够看到Swagger UI界面。
示例代码
application.yml配置
spring:mvc:pathmatch:matching-strategy: ant_path_matcherpom.xml依赖
<dependency><groupId>org.springdoc</groupId><artifactId>springdoc-openapi-ui</artifactId><version>1.6.11</version>
</dependency>SwaggerConfig配置类（可选）
如果你需要自定义Swagger文档的标题、描述等信息，可以创建一个配置类：
import org.springdoc.core.GroupedOpenApi;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;@Configuration
public class SwaggerConfig {@Beanpublic GroupedOpenApi publicApi() {return GroupedOpenApi.builder().group("public").pathsToMatch("/api/**").build();}
}无法显示swagger页面
如果在访问 http://localhost:8080/swagger-ui/index.html 时没有看到Swagger UI界面
1. 检查依赖是否正确加载
确保springdoc-openapi-ui依赖已经正确添加到pom.xml中，并且没有冲突的依赖。例如：
<dependency><groupId>org.springdoc</groupId><artifactId>springdoc-openapi-ui</artifactId><version>1.6.11</version>
</dependency>运行以下命令来清理并重新构建项目：
mvn clean install2. 检查Spring Boot的静态资源路径
默认情况下，Spring Boot会将/swagger-ui/index.html映射到Swagger UI的静态资源路径。确保你的Spring Boot应用没有覆盖默认的静态资源路径。
在application.properties或application.yml中，确保没有覆盖spring.mvc.static-path-pattern属性。如果有，可以尝试将其设置为默认值：
spring.mvc.static-path-pattern=/**3. 检查Swagger UI的路径
默认情况下，Swagger UI的路径是/swagger-ui/index.html。如果你使用的是springdoc，可以通过以下配置自定义路径：
springdoc.swagger-ui.path=/swagger-ui.html然后访问http://localhost:8080/swagger-ui.html。
4. 检查是否有其他Spring Security配置
如果你的项目中使用了Spring Security，可能需要为Swagger UI的路径添加访问权限。例如：
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {@Overrideprotected void configure(HttpSecurity http) throws Exception {http.authorizeRequests().antMatchers("/swagger-ui/**", "/v3/api-docs/**").permitAll() // 允许访问Swagger UI和API文档.anyRequest().authenticated().and().formLogin().permitAll().and().logout().permitAll();}
}5. 检查是否有其他Servlet或DispatcherServlet配置
如果你的项目中自定义了Servlet或DispatcherServlet，可能会影响Swagger UI的路径映射。确保没有其他配置覆盖了Swagger UI的默认路径。
6. 检查是否有其他静态资源冲突
如果你的项目中自定义了静态资源路径，可能会与Swagger UI的路径冲突。确保没有其他静态资源覆盖了/swagger-ui/index.html路径。
7. 检查是否有其他中间件或代理配置
如果你的项目部署在某个中间件或代理服务器后面，可能需要确保中间件或代理服务器正确转发了/swagger-ui/index.html路径。
8. 检查日志输出
启动项目时，查看日志输出，确认Swagger UI的静态资源是否被正确加载。例如，你可能会看到类似以下的日志：
Mapped URL path [/swagger-ui/index.html] onto handler of type [class org.springdoc.webmvc.ui.SwaggerIndexTransformer]
如果没有看到类似的日志，可能表示Swagger UI的静态资源没有被正确加载。
9. 尝试访问其他Swagger UI路径
除了/swagger-ui/index.html，还可以尝试访问以下路径：
-
http://localhost:8080/swagger-ui.html -
http://localhost:8080/v3/api-docs
如果能够访问到/v3/api-docs，说明Swagger的API文档已经生成，但Swagger UI可能没有正确加载。
10. 检查是否有其他错误
查看项目启动时的完整日志，确认是否有其他错误导致Swagger UI无法加载。例如，可能存在某些依赖冲突或配置错误。
- Thank you -
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