在邮递员响应中填充java错误

Question

正在开发一个 spring-boot 项目，并尝试在邮递员正文中发送一个自定义错误，如下所示。

{
  status:404,
  message:"No Question Found."
}

在我的服务类我已经实现了这段代码，我想发送错误。

if (outputDTOSet.size() != 0) {
        } else {
            throw new BusinessException(Response.Status.NOT_FOUND,"No Question Found");
        }

但是在控制台中出现错误。

[Request processing failed: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.glassfish.jersey.internal.RuntimeDelegateImpl] with root cause

BusinessException类

public class BusinessException extends WebApplicationException {
    public BusinessException(Response.Status status, String errorMessage){
        super(Response.status(status)
                .entity(new ErrorResponse(status.getStatusCode(), errorMessage)).type(MediaType.APPLICATION_JSON).build());
    }
}

ErrorResponse.java类

@Data
@AllArgsConstructor
public class ErrorResponse {
    private int status;
    private String errorMessage;
}

请帮忙。

Answer 1

您的代码中有很多错误。 springboot中捕获自定义异常应该按如下方式完成：

创建自定义异常：

@Getter
@Setter
@AllArgsConstructor
public class BusinessException extends RuntimeException { // I didn't find the WebApplicationException , so I replaced it with RuntimeException
    private int status;
    private String message;
}

捕获自定义异常并返回错误消息

@ControllerAdvice // This annotation must be added
@Slf4j
public class BusinessExceptionHandler {

    @ExceptionHandler(BusinessException.class) // This annotation must be added
    @ResponseBody
    public ErrorResponse handleBusinessException(BusinessException e) {
        log.error("BusinessException: {}", e.getMessage());
        return new ErrorResponse(e.getStatus(), e.getMessage());
    }
}

测试

@RequestMapping("/error_test")
public void error() {
    throw new BusinessException(404, "No Question Found");
}