java.lang.IllegalStateException：在使用 spring boot 实现开放 api 时无法读取类的元数据

Question

我正在尝试在 Spring Boot 中使用 Spring实现Open API Doc和Open API UI：

我指的是以下指南：https : //www.baeldung.com/spring-rest-openapi-documentation

maven中的依赖如下：

        <!-- https://mvnrepository.com/artifact/org.springdoc/springdoc-openapi-core -->
        <dependency>
            <groupId>org.springdoc</groupId>
            <artifactId>springdoc-openapi-core</artifactId>
            <version>1.1.49</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springdoc/springdoc-openapi-ui -->
        <dependency>
            <groupId>org.springdoc</groupId>
            <artifactId>springdoc-openapi-ui</artifactId>
            <version>1.2.20</version>
        </dependency>

我使用的 Spring Boot 版本是 2.2

我在通过以下方式运行应用程序时遇到与元数据相关的错误 ./mvnw spring-boot:run

java.lang.IllegalStateException: Unable to read meta-data for class org.springdoc.core.MultipleOpenApiSupportConfiguration
        at org.springframework.boot.autoconfigure.AutoConfigurationSorter$AutoConfigurationClass.getAnnotationMetadata(AutoConfigurationSorter.java:233) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
        at org.springframework.boot.autoconfigure.AutoConfigurationSorter$AutoConfigurationClass.getOrder(AutoConfigurationSorter.java:204) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
        at org.springframework.boot.autoconfigure.AutoConfigurationSorter$AutoConfigurationClass.access$000(AutoConfigurationSorter.java:150) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
        at org.springframework.boot.autoconfigure.AutoConfigurationSorter.lambda$getInPriorityOrder$0(AutoConfigurationSorter.java:63) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
        at java.base/java.util.TimSort.countRunAndMakeAscending(TimSort.java:360) ~[na:na]
        at java.base/java.util.TimSort.sort(TimSort.java:234) ~[na:na]
        at java.base/java.util.Arrays.sort(Arrays.java:1516) ~[na:na]

任何线索为什么会发生？

Answer 1

springdoc-openapi-ui有springdoc-openapi-core作为传递依赖。只定义最深的依赖是最安全的，并让它拉取上游库的正确版本，如下所示：

<dependency>
    <groupId>org.springdoc</groupId>
    <artifactId>springdoc-openapi-ui</artifactId>
    <version>${springdoc-openapi-ui.version}</version>
</dependency>

换句话说，springdoc-openapi-core从您的 POM 依赖项中删除，只指定上述内容（${springdoc-openapi-ui.version}当然，替换为您想要的版本）。