版本信息
SpringBoot-version: 2.3.1.RELEASE
SpringCLoud-version: Hoxton.SR1
错误信息
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'discoveryLocatorProperties' defined in class path resource [org/springframework/cloud/gateway/discovery/GatewayDiscoveryClientAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.gateway.discovery.DiscoveryLocatorProperties]: Factory method 'discoveryLocatorProperties' threw exception; nested exception is java.lang.NoClassDefFoundError: javax/validation/ValidationException
...
Caused by: java.lang.ClassNotFoundException: javax.validation.ValidationException
...
... 36 common frames omitted
解决办法
根据 Spring Boot 2.3 Release Notes ，Validation Starter不再包含在Web Start中，所以需要我们额外的引入Validation的依赖包。
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
参考
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