一、错误信息：

Connected to the target VM, address: '127.0.0.1:51104', transport: 'socket'

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::               (v2.6.11)

2023-03-29 14:26:04.804  WARN 15705 --- [           main] o.s.boot.StartupInfoLogger               : InetAddress.getLocalHost().getHostName() took 5005 milliseconds to respond. Please verify your network configuration (macOS machines may need to add entries to /etc/hosts).
2023-03-29 14:26:09.816  WARN 15705 --- [           main] o.s.boot.system.ApplicationPid           : ManagementFactory.getRuntimeMXBean().getName() took 5005 milliseconds to respond. This may be due to slow host name resolution. Please verify your network configuration (macOS machines may need to add entries to /etc/hosts).
2023-03-29 14:26:09.819  INFO 15705 --- [           main] c.isstech.UserManageWrapperApplication   : Starting UserManageWrapperApplication using Java 1.8.0_112 on liyajiemac.local with PID 15705 (/Users/jerry/Work/【17】base-micro-framework/base-micro-module/user-manage/user-manage-wrapper/target/classes started by jerry in /Users/jerry/Work/【17】base-micro-framework)
2023-03-29 14:26:09.820  INFO 15705 --- [           main] c.isstech.UserManageWrapperApplication   : The following 2 profiles are active: "mysql", "jpa"
2023-03-29 14:26:12.527  INFO 15705 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2023-03-29 14:26:12.697  INFO 15705 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 90 ms. Found 1 JPA repository interfaces.
2023-03-29 14:26:13.173  INFO 15705 --- [           main] o.s.c.a.ConfigurationClassEnhancer       : @Bean method SwaggerAutoConfiguration.docketBeanFactoryPostProcessor is non-static and returns an object assignable to Spring's BeanFactoryPostProcessor interface. This will result in a failure to process annotations such as @Autowired, @Resource and @PostConstruct within the method's declaring @Configuration class. Add the 'static' modifier to this method to avoid these container lifecycle issues; see @Bean javadoc for complete details.
2023-03-29 14:26:14.080  INFO 15705 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2023-03-29 14:26:14.104  INFO 15705 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2023-03-29 14:26:14.105  INFO 15705 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.65]
2023-03-29 14:26:14.387  INFO 15705 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2023-03-29 14:26:14.387  INFO 15705 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 4485 ms
2023-03-29 14:26:14.475  INFO 15705 --- [           main] c.a.d.s.b.a.DruidDataSourceAutoConfigure : Init DruidDataSource
2023-03-29 14:26:14.698  INFO 15705 --- [           main] com.alibaba.druid.pool.DruidDataSource   : {dataSource-1} inited
2023-03-29 14:26:14.934  INFO 15705 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2023-03-29 14:26:14.997  INFO 15705 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.6.10.Final
2023-03-29 14:26:15.221  INFO 15705 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2023-03-29 14:26:15.738  INFO 15705 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.MySQL57Dialect
2023-03-29 14:26:16.881  INFO 15705 --- [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2023-03-29 14:26:16.896  INFO 15705 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2023-03-29 14:26:17.653  WARN 15705 --- [           main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2023-03-29 14:26:18.198  INFO 15705 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2023-03-29 14:26:18.203  WARN 15705 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException
2023-03-29 14:26:18.207  INFO 15705 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2023-03-29 14:26:18.210  INFO 15705 --- [           main] com.alibaba.druid.pool.DruidDataSource   : {dataSource-1} closing ...
2023-03-29 14:26:18.218  INFO 15705 --- [           main] com.alibaba.druid.pool.DruidDataSource   : {dataSource-1} closed
2023-03-29 14:26:18.225  INFO 15705 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2023-03-29 14:26:18.246  INFO 15705 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2023-03-29 14:26:18.286 ERROR 15705 --- [           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-5.3.22.jar:5.3.22]
    at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.22.jar:5.3.22]
    at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.22.jar:5.3.22]
    at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_112]
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.22.jar:5.3.22]
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.22.jar:5.3.22]
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.22.jar:5.3.22]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.22.jar:5.3.22]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.11.jar:2.6.11]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:745) [spring-boot-2.6.11.jar:2.6.11]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:420) [spring-boot-2.6.11.jar:2.6.11]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-2.6.11.jar:2.6.11]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1317) [spring-boot-2.6.11.jar:2.6.11]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) [spring-boot-2.6.11.jar:2.6.11]
    at com.isstech.UserManageWrapperApplication.main(UserManageWrapperApplication.java:16) [classes/:na]
Caused by: java.lang.NullPointerException: null
    at 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$3(Orderings.java:89) ~[springfox-spi-3.0.0.jar:3.0.0]
    at java.util.Comparator.lambda$comparing$77a9974f$1(Comparator.java:469) ~[na:1.8.0_112]
    at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355) ~[na:1.8.0_112]
    at java.util.TimSort.sort(TimSort.java:220) ~[na:1.8.0_112]
    at java.util.Arrays.sort(Arrays.java:1512) ~[na:1.8.0_112]
    at java.util.ArrayList.sort(ArrayList.java:1454) ~[na:1.8.0_112]
    at java.util.stream.SortedOps$RefSortingSink.end(SortedOps.java:387) ~[na:1.8.0_112]
    at java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:1.8.0_112]
    at java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:1.8.0_112]
    at java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:1.8.0_112]
    at java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:1.8.0_112]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ~[na:1.8.0_112]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_112]
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_112]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_112]
    at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_112]
    at springfox.documentation.spring.web.plugins.WebMvcRequestHandlerProvider.requestHandlers(WebMvcRequestHandlerProvider.java:81) ~[springfox-spring-webmvc-3.0.0.jar:3.0.0]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_112]
    at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374) ~[na:1.8.0_112]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_112]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_112]
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_112]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_112]
    at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_112]
    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-5.3.22.jar:5.3.22]
    ... 14 common frames omitted

Disconnected from the target VM, address: '127.0.0.1:51104', transport: 'socket'

Process finished with exit code 1

二、 问题原因
Springboot 2.6.x 版本都是基于path_pattern_matcher的，要使用swagger需要配置其为ant_path_matcher，但是如果你有使用Springboot的Actuator，那么Actuator就会失效，因为它是基于path_pattern_matcher的。如果有需要同时使用，则需进行兼容性代码修改。

三、解决方案

1. pom.xml 中引入的包

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>2021.0.4</version>
            <type>pom</type>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-dependencies</artifactId>
            <version>2021.0.4.0</version>
            <type>pom</type>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <dependency>
            <groupId>com.spring4all</groupId>
            <artifactId>swagger-spring-boot-starter</artifactId>
        </dependency>

2. application.yml或 application.properties文件中添加配置

# 解决springboot 2.6.* 和 swagger 3.0 整合报错
spring:
  mvc:
    pathmatch:
      matching-strategy: ant_path_matcher

3.添加配置类

package com.isstech.config;

import org.springframework.boot.actuate.autoconfigure.endpoint.web.CorsEndpointProperties;
import org.springframework.boot.actuate.autoconfigure.endpoint.web.WebEndpointProperties;
import org.springframework.boot.actuate.autoconfigure.web.server.ManagementPortType;
import org.springframework.boot.actuate.endpoint.ExposableEndpoint;
import org.springframework.boot.actuate.endpoint.web.*;
import org.springframework.boot.actuate.endpoint.web.annotation.ControllerEndpointsSupplier;
import org.springframework.boot.actuate.endpoint.web.annotation.ServletEndpointsSupplier;
import org.springframework.boot.actuate.endpoint.web.servlet.WebMvcEndpointHandlerMapping;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RestController;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;

import java.sql.Date;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 * @Description 为解决 springboot 2.6 和 swagger 3.0 添加的配置类
 *
 * @Author 
 * @DateTime 2023/3/29 17:29
 */
@Configuration
public class SwaggerConfig {

    /**
     * 配置基本信息
     * @return
     */
    @Bean
    public ApiInfo apiInfo() {
        return new ApiInfoBuilder()
            .title("Restful API")
            .description("aPaaS-isstech restful api")
            .contact(new Contact("基础框架","","yjlicm@isoftstone.com"))
            .version("1.0")
            .build();
    }

    /**
     * 配置文档生成最佳实践
     * @param apiInfo
     * @return
     */
    @Bean
    public Docket createRestApi(ApiInfo apiInfo) {
        return new Docket(DocumentationType.OAS_30)
            .apiInfo(apiInfo)
            .groupName("SwaggerGroupOneAPI")
            .select()
            .apis(RequestHandlerSelectors.withClassAnnotation(RestController.class))
            .paths(PathSelectors.any())
            .build().directModelSubstitute(Timestamp.class, Date.class);
    }



    /**
     * 增加如下配置可解决Spring Boot 6.x 与Swagger 3.0.0 不兼容问题
     **/
    @Bean
    public WebMvcEndpointHandlerMapping webEndpointServletHandlerMapping(WebEndpointsSupplier webEndpointsSupplier, ServletEndpointsSupplier servletEndpointsSupplier, ControllerEndpointsSupplier controllerEndpointsSupplier, EndpointMediaTypes endpointMediaTypes, CorsEndpointProperties corsProperties, WebEndpointProperties webEndpointProperties, Environment environment) {
        List<ExposableEndpoint<?>> allEndpoints = new ArrayList();
        Collection<ExposableWebEndpoint> webEndpoints = webEndpointsSupplier.getEndpoints();
        allEndpoints.addAll(webEndpoints);
        allEndpoints.addAll(servletEndpointsSupplier.getEndpoints());
        allEndpoints.addAll(controllerEndpointsSupplier.getEndpoints());
        String basePath = webEndpointProperties.getBasePath();
        EndpointMapping endpointMapping = new EndpointMapping(basePath);
        boolean shouldRegisterLinksMapping = this.shouldRegisterLinksMapping(webEndpointProperties, environment, basePath);
        return new WebMvcEndpointHandlerMapping(endpointMapping, webEndpoints, endpointMediaTypes, corsProperties.toCorsConfiguration(), new EndpointLinksResolver(allEndpoints, basePath), shouldRegisterLinksMapping, null);
    }
    private boolean shouldRegisterLinksMapping(WebEndpointProperties webEndpointProperties, Environment environment, String basePath) {
        return webEndpointProperties.getDiscovery().isEnabled() && (StringUtils.hasText(basePath) || ManagementPortType.get(environment).equals(ManagementPortType.DIFFERENT));
    }

}