Spring Boot 应用程序运行失败：ConflictingBeanDefinitionException 错误

2023-09-26T15:12:11.423+08:00 ERROR 3320 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [com.template.farmingplus.FarmingplusApplication] at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:178) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:415) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:287) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:344) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:115) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:771) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:589) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.1.4.jar:3.1.4] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) ~[spring-boot-3.1.4.jar:3.1.4] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:439) ~[spring-boot-3.1.4.jar:3.1.4] at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-3.1.4.jar:3.1.4] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1309) ~[spring-boot-3.1.4.jar:3.1.4] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1298) ~[spring-boot-3.1.4.jar:3.1.4] at com.template.farmingplus.FarmingplusApplication.main(FarmingplusApplication.java:12) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na] at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:50) ~[spring-boot-devtools-3.1.4.jar:3.1.4] Caused by: org.springframework.context.annotation.ConflictingBeanDefinitionException: Annotation-specified bean name 'newsController' for bean class [com.template.farmingplus.pageController.newsController] conflicts with existing, non-compatible bean definition of same name and class [com.template.farmingplus.controller.NewsController] at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.checkCandidate(ClassPathBeanDefinitionScanner.java:349) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:287) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.annotation.ComponentScanAnnotationParser.parse(ComponentScanAnnotationParser.java:128) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:289) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:243) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:196) ~[spring-context-6.0.12.jar:6.0.12] at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:164) ~[spring-context-6.0.12.jar:6.0.12] ... 18 common frames omitted

发生了以下问题：

• 应用程序运行失败，出现了 BeanDefinitionStoreException 异常。
• 该异常是由 ConflictingBeanDefinitionException 异常引起的，表明存在两个相同名称但不兼容的 bean 定义。
• 冲突的 bean 名称是 'newsController'，分别来自 com.template.farmingplus.pageController.newsController 和 com.template.farmingplus.controller.NewsController 类。

解决方法：

• 更改其中一个类的 bean 名称，例如将 com.template.farmingplus.pageController.newsController 类改为 com.template.farmingplus.pageController.NewsPageController。
• 使用不同的注解来指定 bean 名称，例如使用 @Bean 注解并指定不同的 bean 名称。
• 确保两个类之间的功能差异，并选择适合的 bean 名称。

通过解决 bean 名称冲突，您应该能够成功启动应用程序。