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spring - 如何解决 java.lang.NoClassDefFoundError: com/fasterxml/classmate/TypeResolver 在运行 Spring Boot 应用程序时

问题描述

我正在尝试运行一个与 keycloak 集成的示例应用程序（用于 IAM）。构建成功，但是在运行应用程序时，出现以下错误...

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-07-19 11:30:28.660 ERROR 103440 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultValidator' defined in class path resource [org/springframework/boot/autoconfigure/validation/ValidationAutoConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/classmate/TypeResolver
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1708) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:581) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]

at org.keycloak.quickstarts.devconf2019.app.CarsApp.main(CarsApp.java:38) [classes/:na]
Caused by: java.lang.NoClassDefFoundError: com/fasterxml/classmate/TypeResolver

我添加了 com.fasterxml.jackson.core(2.9.5) 和 com.fasterxml(1.3.1) 作为依赖项。Springboot 版本是 - 2.0.3.RELEASE

fastxml 依赖项是否存在版本兼容性问题？如何找到缺少的依赖项并解决这个问题？

标签： springspring-bootkeycloakspring-framework-beans

解决方案

您需要添加 hibernate-validator 依赖项，它附带了 com.fasterxml:classmate 捆绑在其中。

<dependency>
    <groupId>org.hibernate.validator</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>7.0.1.Final</version>
</dependency>

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