我正在尝试使用 @ControllerAdvice 处理 MethodArgumentNotValidException，如下所示:
@ControllerAdvice
public class RestResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {
private Logger log = LoggerFactory.getLogger(RestResponseEntityExceptionHandler.class);
@Autowired
private ApplicationContext applicationContext;
@ExceptionHandler({ ConstraintViolationException.class })
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ResponseBody
public ErrorWrapper handleConstraintViolationException(ConstraintViolationException e) {
String fieldName = e.getConstraintName();
String message = getResourceMessage(fieldName + ".alreadyExists", "Already Exists");
return new ErrorWrapper(fieldName + ".error", message);
}
@ExceptionHandler({ MethodArgumentNotValidException.class })
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ResponseBody
public ErrorWrapper handleMethodArgumentNotValidException(MethodArgumentNotValidException e) {
return new ErrorWrapper(".error", "test");
}
private String getResourceMessage(String key, String defaultMessage) {
String message = applicationContext.getMessage(key, null, Locale.getDefault());
if (StringUtils.isNotEmpty(message)) {
return message;
}
return defaultMessage;
}
}
我遇到了以下异常
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous @ExceptionHandler method mapped for [class org.springframework.web.bind.MethodArgumentNotValidException]: {public com.ca.bean.ErrorWrapper com.ca.exceptionHandler.RestResponseEntityExceptionHandler.handleMethodArgumentNotValidException(org.springframework.web.bind.MethodArgumentNotValidException), public final org.springframework.http.ResponseEntity org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler.handleException(java.lang.Exception,org.springframework.web.context.request.WebRequest)}
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:775) ~[spring-beans-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) ~[spring-context-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444) ~[spring-web-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326) ~[spring-web-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) [spring-web-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5099) [catalina.jar:7.0.70]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5615) [catalina.jar:7.0.70]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) [catalina.jar:7.0.70]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571) [catalina.jar:7.0.70]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561) [catalina.jar:7.0.70]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_92]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_92]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_92]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_92]
Caused by: java.lang.IllegalStateException: Ambiguous @ExceptionHandler method mapped for [class org.springframework.web.bind.MethodArgumentNotValidException]: {public com.ca.bean.ErrorWrapper com.ca.exceptionHandler.RestResponseEntityExceptionHandler.handleMethodArgumentNotValidException(org.springframework.web.bind.MethodArgumentNotValidException), public final org.springframework.http.ResponseEntity org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler.handleException(java.lang.Exception,org.springframework.web.context.request.WebRequest)}
at org.springframework.web.method.annotation.ExceptionHandlerMethodResolver.addExceptionMapping(ExceptionHandlerMethodResolver.java:109) ~[spring-web-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.web.method.annotation.ExceptionHandlerMethodResolver.<init>(ExceptionHandlerMethodResolver.java:76) ~[spring-web-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver.initExceptionHandlerAdviceCache(ExceptionHandlerExceptionResolver.java:265) ~[spring-webmvc-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver.afterPropertiesSet(ExceptionHandlerExceptionResolver.java:241) ~[spring-webmvc-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.3.0.RELEASE.jar:4.3.0.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.3.0.RELEASE.jar:4.3.0.RELEASE]
... 21 common frames omitted
我使用的是 spring 4.3.0。 我想处理 MethodArgumentNotValidException 并想发送自定义消息。我犯了什么错误？请帮忙。
最佳答案
Springs ResponseEntityExceptionHandler 有一个方法handleException，其注释为:
@ExceptionHandler({
...
MethodArgumentNotValidException.class,
...
})
您的方法handleMethodArgumentNotValidException也被注释为处理MethodArgumentNotValidException。所以spring找到了两个应该用来处理同一个异常的方法，这就是异常的原因。
**解决方案** 不要添加新方法 handleMethodArgumentNotValidException ，而只是重写方法 ResponseEntityExceptionHandler.handleMethodArgumentNotValid ，并且不要对其进行注释。 您的 ErrorWrapper 类必须为此扩展 ResponseEntity。
关于java - 为 [class org.springframework.web.bind.MethodArgumentNotValidException] 映射的不明确 @ExceptionHandler 方法，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38282298/