使用Spring Data REST处理自定义异常（i18n）

  • Z时代
  • 2024-01-10
  • 分类：问答

我正在将Spring Boot 1.5.4与Spring JPA，Spring Data

REST，HATEOAS结合使用…我正在寻找最佳实践（Spring方式）来自定义Spring Data REST正在管理添加i18n支持的异常。

我查看了MessageException类（https://github.com/spring-projects/spring-data-

rest/blob/master/spring-data-rest-

webmvc/src/main/java/org/springframework/data/rest

/webmvc/support/ExceptionMessage.java）作为起点。

一个典型的Spring Data REST异常非常好：

    {
    "timestamp": "2017-06-24T16:08:54.107+0000",
    "status": 500,
    "error": "Internal Server Error",
    "exception": "org.springframework.dao.InvalidDataAccessApiUsageException",
    "message": "org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved beforeQuery current operation : com.test.server.model.workflows.WorkSession.checkPoint -> com.test.server.model.checkpoints.CheckPoint; nested exception is java.lang.IllegalStateException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved beforeQuery current operation : com.test.server.model.workflows.WorkSession.checkPoint -> com.test.server.model.checkpoints.CheckPoint",
    "path": "/api/v1/workSessions/start"
}

我想做的是：

  1. 本地化错误和消息字段（i18n）

  2. 可能将消息文本更改为其他内容（始终本地化）

我没有在Spring Data REST文档中找到任何有关如何自定义或本地化异常的参考（https://docs.spring.io/spring-

data/rest/docs/current/reference/html/）。我希望有一种优雅的方法可以做到这一点。

我在WebMvcConfigurerAdapter中添加了以下内容：

@Bean
public LocaleResolver localeResolver() {
    return new SmartLocaleResolver();
}
public class SmartLocaleResolver extends CookieLocaleResolver {
    @Override
    public Locale resolveLocale(HttpServletRequest request) {
        String acceptLanguage = request.getHeader("Accept-Language");
        if (acceptLanguage == null || acceptLanguage.trim().isEmpty()) {
            return super.determineDefaultLocale(request);
        }
        return request.getLocale();
    }
}
@Bean
public ResourceBundleMessageSource messageSource() {
    ResourceBundleMessageSource source = new ResourceBundleMessageSource();
    source.setBasenames("i18n/messages"); // name of the resource bundle
    source.setUseCodeAsDefaultMessage(true);
    return source;
}

我想我可以通过这种方式拦截异常：

    @ControllerAdvice(annotations = RepositoryRestController.class)
public class GenericExceptionHandler {
    @ExceptionHandler
    public ResponseEntity handle(Exception e, Locale locale) {
          //missing part...
            return new ResponseEntity(exceptionMessageObject, new HttpHeaders(), httpStatus);
    }

有没有办法使用Spring最佳实践将所有内容放在一起？

回答：

@ControllerAdvice(annotations = RepositoryRestController.class)
public class GenericExceptionHandler {
    @Autowired
    private MessageSource messageSource;
    @ExceptionHandler
    //if you don't use Exception e in method you can remove it , live only Locale
    public ResponseEntity handle(Exception e, Locale locale) {
            String errorMessage = messageSource.getMessage(
                                 "error.message", new Object[]{},locale);  
            //set message  or return it instead of exceptionMessageObject
            exceptionMessageObject.setMessage(exceptionMessageObject);
            return new ResponseEntity(exceptionMessageObject, 
                   new HttpHeaders(), httpStatus);
    }

参见Spring

7.15.1使用MessageSource进行国际化

“我应该如何像创建一个Spring Data REST一样创建exceptionMessageObject？”

创建您自己的错误包装器，例如：

public class CustomError {
    private HttpStatus status;
    private String message;
    private Exception originalException;//if you need it        
    // getter setter
}

“如何为不同的异常提供不同的消息？我是否应该创建一条长的if链来检查异常的类？”

创建解析器

private String resolveExceptionToMessage(Exception exceptio){
    //or put in map<Exceptio,String error.message.type1> 
    // String errorCode = map.get(excptio);
    //eturn messageSource.getMessage(errorCode , new Object[]{},locale);
    if(exceptio instanceof ....){
        return messageSource.getMessage("error.message.type1", new Object[]{},locale);
    }
    return "";
}

或将方法与@ExceptionHandler（{CustomException1.class}），@ExceptionHandler（{CustomException1.class}）....一起使用，并在每个方法中仅添加errror.code，其他所有部分都相似

 @ExceptionHandler({ CustomException1.class})
    public ResponseEntity handleException1() {
        return createError(code for this exceptio 1);
    }
    @ExceptionHandler({ CustomException2.class})
    public ResponseEntity handleException2() {
        return createError(code for this exceptio 2);
    }
    private ResponseEntity createError(String errorCode ) {
            CustomError customError = new CustomError();
            customError.setHttpStatus(HttpStatus.BAD_REQUEST);
            String errorMessage = messageSource.getMessage(
                                 errorCode , new Object[]{},locale);
            customError.setMessage(errorMessage );
            customError.setOriginalException(e);
            return new ResponseEntity<Object>(customError, new HttpHeaders(), 
                          customError.getStatus());
    }

如何设置httpStatus？我想将默认状态Spring Data REST用于常见异常…

public ResponseEntity handle(Exception e, Locale locale) {
        CustomError customError = new CustomError();
        customError.setHttpStatus(HttpStatus.BAD_REQUEST);
        customError.setMessage(resolveExceptionToMessage(e));
        customError.setOriginalException(e);
        return new ResponseEntity<Object>(customError, new HttpHeaders(), 
                      customError.getStatus());
}

以上是 使用Spring Data REST处理自定义异常（i18n） 的全部内容， 来源链接： utcz.com/qa/402040.html

回到顶部