一、定义全局接口异常处理的类
基于spring的org.springframework.web.bind.annotation.RestControllerAdvice 是全局接口异常处理GlobalExceptionHandlerAdvice类，当发生异常没有捕获时，@ExceptionHandler便标记自定义处理入口方法
import com.louis.springboot.demo.entity.Result;@b@ import lombok.extern.slf4j.Slf4j;@b@import org.springframework.web.bind.annotation.ExceptionHandler;@b@import org.springframework.web.bind.annotation.RestControllerAdvice;@b@@b@@RestControllerAdvice@b@@Slf4j@b@public class GlobalExceptionHandlerAdvice extends DefaultGlobalExceptionHandlerAdvice {@b@@b@ @ExceptionHandler(value = {UserNotFoundException.class})@b@ public Result userNotFound(UserNotFoundException ex) {@b@ log.error(ex.getMessage());@b@ return Result.fail(ex.getErrorType());@b@ }@b@}二、DefaultGlobalExceptionHandlerAdvice类 -用于处理通用基础异常
import com.louis.springboot.demo.entity.Result;@b@import lombok.extern.slf4j.Slf4j;@b@import org.springframework.dao.DuplicateKeyException;@b@import org.springframework.http.HttpStatus;@b@import org.springframework.web.bind.MethodArgumentNotValidException;@b@import org.springframework.web.bind.MissingServletRequestParameterException;@b@import org.springframework.web.bind.annotation.ExceptionHandler;@b@import org.springframework.web.bind.annotation.ResponseStatus;@b@import org.springframework.web.multipart.MultipartException;@b@ @b@@Slf4j@b@public class DefaultGlobalExceptionHandlerAdvice {@b@@b@ @ExceptionHandler(value = {MissingServletRequestParameterException.class})@b@ public Result missingServletRequestParameterException(MissingServletRequestParameterException ex) {@b@ log.error("missing servlet request parameter exception:{}", ex.getMessage());@b@ return Result.fail(SystemErrorType.ARGUMENT_NOT_VALID);@b@ }@b@@b@ @ExceptionHandler(value = {MultipartException.class})@b@ public Result uploadFileLimitException(MultipartException ex) {@b@ log.error("upload file size limit:{}", ex.getMessage());@b@ return Result.fail(SystemErrorType.UPLOAD_FILE_SIZE_LIMIT);@b@ }@b@@b@ @ExceptionHandler(value = {MethodArgumentNotValidException.class})@b@ public Result serviceException(MethodArgumentNotValidException ex) {@b@ log.error("service exception:{}", ex.getMessage());@b@ return Result.fail(SystemErrorType.ARGUMENT_NOT_VALID, ex.getBindingResult().getFieldError().getDefaultMessage());@b@ }@b@@b@ @ExceptionHandler(value = {DuplicateKeyException.class})@b@ public Result duplicateKeyException(DuplicateKeyException ex) {@b@ log.error("primary key duplication exception:{}", ex.getMessage());@b@ return Result.fail(SystemErrorType.DUPLICATE_PRIMARY_KEY);@b@ }@b@@b@ @ExceptionHandler(value = {BaseException.class})@b@ public Result baseException(BaseException ex) {@b@ log.error("base exception:{}", ex.getMessage());@b@ return Result.fail(ex.getErrorType());@b@ }@b@@b@ @ExceptionHandler(value = {Exception.class})@b@ @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)@b@ public Result exception() {@b@ return Result.fail();@b@ }@b@@b@ @ExceptionHandler(value = {Throwable.class})@b@ @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)@b@ public Result throwable() {@b@ return Result.fail();@b@ }@b@}三、自定义异常UserNotFoundException
public class UserNotFoundException extends BaseException {@b@ public UserNotFoundException() {@b@ super(OrganizationErrorType.USER_NOT_FOUND);@b@ }@b@@b@ public UserNotFoundException(String message) {@b@ super(OrganizationErrorType.USER_NOT_FOUND, message);@b@ }@b@}四、测试接口
import com.louis.springboot.demo.exception.UserNotFoundException;@b@import org.springframework.web.bind.annotation.GetMapping;@b@import org.springframework.web.bind.annotation.RestController;@b@@b@@RestController@b@public class HelloController { @b@@b@ @GetMapping("/throwUserNotFound")@b@ public void throwUserNotFound() {@b@ throw new UserNotFoundException("user not found ");@b@ }@b@ @b@}访问http://localhost:8000/throwUserNotFound接口，浏览器结果如下
另外，完整项目demo下载