Springfox swagger 在 Spring Boot 2.2.0 中不起作用

Question

我想将 spring boot v2.1.9 升级到 2.2.0。但升级后我遇到了一些异常，这表明 spring Fox 使用的是旧版本的 spring-plugin-core。

有没有其他解决方案，或者我需要放弃 springfox 插件吗？

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APPLICATION FAILED TO START
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Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    springfox.documentation.spring.web.plugins.DocumentationPluginsManager.createContextBuilder(DocumentationPluginsManager.java:152)

The following method did not exist:

    org.springframework.plugin.core.PluginRegistry.getPluginFor(Ljava/lang/Object;Lorg/springframework/plugin/core/Plugin;)Lorg/springframework/plugin/core/Plugin;

The method's class, org.springframework.plugin.core.PluginRegistry, is available from the following locations:

    jar:file:/C:/Users/regosa/.m2/repository/org/springframework/plugin/spring-plugin-core/2.0.0.RELEASE/spring-plugin-core-2.0.0.RELEASE.jar!/org/springframework/plugin/core/PluginRegistry.class

It was loaded from the following location:

    file:/C:/Users/regosa/.m2/repository/org/springframework/plugin/spring-plugin-core/2.0.0.RELEASE/spring-plugin-core-2.0.0.RELEASE.jar


Action:

Correct the classpath of your application so that it contains a single, compatible version of org.springframework.plugin.core.PluginRegistry

maven依赖树文件:https://drive.google.com/file/d/1gayvvVe_VsB1P2Hi2rcwRw8NdK89qtbq/view

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.xxxxx.business.workflow</groupId>
    <artifactId>xxxxx-component-workflow-starter</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    <name>xxxxx-component-workflow-starter</name>
    <description>xxxxx-component-workflow-starter</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>11</java.version>
        <jaxb-runtime.version>2.4.0-b180830.0438</jaxb-runtime.version>
        <spring-cloud.version>Greenwich.M1</spring-cloud.version>
       <zeebe-version>0.20.1</zeebe-version>    
        <google-guava.version>27.0.1-jre</google-guava.version>
        <xxxxx.version>1.0</xxxxx.version>
        <swagger.version>2.9.2</swagger.version>
        <jjwt.version>0.9.1</jjwt.version>
        <json.version>20180813</json.version>
        <slf4j-api.version>1.7.25</slf4j-api.version>
        <mysql.version>8.0.11</mysql.version>
        <mongo-java-driver.version>3.10.1</mongo-java-driver.version>
        <commons-io.version>2.6</commons-io.version>
        <commons-lang.version>2.6</commons-lang.version>
        <commons-pool2.version>2.5.0</commons-pool2.version>
        <redis.version>3.1.0</redis.version>
        <velocity.version>1.7</velocity.version>
        <velocity-tools.version>2.0</velocity-tools.version>
        <logstash-logback-encoder.version>5.3</logstash-logback-encoder.version>
        <httpclient.version>4.5.6</httpclient.version>
        <jaxb-runtime.version>2.4.0-b180830.0438</jaxb-runtime.version>
        <env>local</env>
    </properties>   

    <dependencies>
        <!-- Start: Spring Libraries -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-sleuth</artifactId>
        </dependency>
        <!-- End: Spring Libraries -->

        <!-- Adding JAXB Runtime since it is not shipped with JDK 9+ -->
        <dependency>
            <groupId>org.glassfish.jaxb</groupId>
            <artifactId>jaxb-runtime</artifactId>
            <version>${jaxb-runtime.version}</version>
        </dependency>

        <!-- Start: xxxxx Libraries -->
        <dependency>
            <groupId>com.xxxxx</groupId>
            <artifactId>xxxxx-entity</artifactId>
            <version>${xxxxx.version}</version>
        </dependency>
        <dependency>
            <groupId>com.xxxxx</groupId>
            <artifactId>xxxxx-redis</artifactId>
            <version>${xxxxx.version}</version>
        </dependency>
        <dependency>
            <groupId>com.xxxxx</groupId>
            <artifactId>xxxxx-mongo</artifactId>
            <version>${xxxxx.version}</version>
        </dependency>           
        <dependency>
            <groupId>com.xxxxx</groupId>
            <artifactId>xxxxx-util</artifactId>
            <version>${xxxxx.version}</version>
        </dependency>
        <dependency>
            <groupId>com.xxxxx.model</groupId>
            <artifactId>xxxxx-model</artifactId>
            <version>${xxxxx.version}</version>
        </dependency>
        <dependency>
            <groupId>com.xxxxx.service</groupId>
            <artifactId>xxxxx-common-service</artifactId>
            <version>${xxxxx.version}</version>
        </dependency>
        <dependency>
            <groupId>com.xxxxx.service</groupId>
            <artifactId>xxxxx-common-messaging</artifactId>
            <version>${xxxxx.version}</version>
        </dependency>   
        <dependency>
            <groupId>com.xxxxx.service</groupId>
            <artifactId>xxxxx-common-security</artifactId>
            <version>${xxxxx.version}</version>
        </dependency>           
        <!-- End: xxxxx Libraries -->

        <!--  Adding Zeebe client as part of the Spring Startup -->     
        <dependency>
            <groupId>io.zeebe</groupId>
            <artifactId>zeebe-client-java</artifactId>
            <version>${zeebe-version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>${google-guava.version}</version>
        </dependency>

        <!-- Logstash Log Encoder -->
        <dependency> 
            <groupId>net.logstash.logback</groupId> 
            <artifactId>logstash-logback-encoder</artifactId> 
            <version>${logstash-logback-encoder.version}</version> 
        </dependency>

        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.mongodb/mongo-java-driver -->
        <dependency>
            <groupId>org.mongodb</groupId>
            <artifactId>mongo-java-driver</artifactId>
            <version>${mongo-java-driver.version}</version>
        </dependency>       

        <!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>${commons-io.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-lang/commons-lang -->
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>${commons-lang.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-pool2 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>${commons-pool2.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>${redis.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>${httpclient.version}</version>
        </dependency>

        <!-- Start: Swagger Libraries -->
        <!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger2 -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>${swagger.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger-ui -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>${swagger.version}</version>
        </dependency>
        <!-- End: Swagger Libraries -->

        <!-- Start: Spring Boot and Security Test Libraries -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- End: Spring Boot and Security Test Libraries -->

    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <finalName>xxxxx-component-workflow-starter</finalName>
        <filters>
            <filter>${env}-build.properties</filter>
        </filters>
        <resources>
            <resource>
                <filtering>true</filtering>
                <directory>${project.basedir}/src/main/resources</directory>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.7.0</version>
                <configuration>
                    <release>${java.version}</release>
                </configuration>
            </plugin>
            <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-jar-plugin</artifactId>
              <configuration>
                <archive>
                  <manifestEntries>
                    <Automatic-Module-Name>com.xxxxx.business.workflow.component.starter</Automatic-Module-Name>
                  </manifestEntries>
                </archive>
              </configuration>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories> 
</project>

Answer 1

已修复!!!

该问题的存在是因为 Spring Fox 库内部依赖于 spring-plugin-core:1.2.0 但它实际上需要 spring-plugin-core:2.0.0。用于支持 Web Flux 的 swagger 库的 SNAPSHOT 版本中似乎缺少此依赖性更正。

我们只需要更正 Maven 依赖项，如下所示，不需要更改代码:

• Maven POM 依赖关系修复

<dependency>
  <groupId>io.springfox</groupId>
  <artifactId>springfox-swagger2</artifactId>
  <version>3.0.0-SNAPSHOT</version>
  <exclusions>
    <exclusion>
      <groupId>org.springframework.plugin</groupId>
      <artifactId>spring-plugin-core</artifactId>
    </exclusion>
  </exclusions>
</dependency>
<dependency>
  <groupId>io.springfox</groupId>
  <artifactId>springfox-swagger-ui</artifactId>
  <version>3.0.0-SNAPSHOT</version>
</dependency>
<dependency>
  <groupId>io.springfox</groupId>
  <artifactId>springfox-spring-webflux</artifactId>
  <version>3.0.0-SNAPSHOT</version>
  <exclusions>
    <exclusion>
      <groupId>org.springframework.plugin</groupId>
      <artifactId>spring-plugin-core</artifactId>
    </exclusion>
  </exclusions>
</dependency>
<dependency>
  <groupId>org.springframework.plugin</groupId>
  <artifactId>spring-plugin-core</artifactId>
  <version>2.0.0.RELEASE</version>
</dependency>

• Swagger 配置:(与之前相同，仅供引用)

    @Configuration
    @EnableSwagger2WebFlux
    public class SwaggerConfiguration {

        @Bean
        public Docket api(final TypeResolver typeResolver) {
            return new Docket(DocumentationType.SWAGGER_2)
                    .select()
                    .apis(RequestHandlerSelectors.any())
                    .paths(PathSelectors.any())
                    .build();
        }
    }