2019独角兽企业重金招聘Python工程师标准>>> 
首先添加全局异常处理：
@ControllerAdvice
@Slf4j
public class GlobalExceptionHandler {
private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
@ExceptionHandler({BaseException.class, HttpMessageNotReadableException.class, HttpMediaTypeNotSupportedException.class, MaxUploadSizeExceededException.class, HttpRequestMethodNotSupportedException.class, MethodArgumentNotValidException.class, BindException.class,})
Object serverExceptionHandler(HttpServletRequest request, HttpServletResponse response, Exception e) {
MsgCode msgCode;
BaseException baseException = null;
response.setContentType(MediaType.APPLICATION_JSON_UTF8_VALUE);
Response result;
if (e instanceof BaseException) {
baseException = (BaseException) e;
msgCode = baseException.getMsgCode();
result = ResponseUtil.fail(Collections.EMPTY_MAP, msgCode, baseException.getMessage());
} else if (e instanceof HttpMessageNotReadableException) {
result = ResponseUtil.fail(Collections.EMPTY_MAP, "缺少必须的参数");
} else if (e instanceof HttpMediaTypeNotSupportedException) {
result = ResponseUtil.fail(Collections.EMPTY_MAP, "请求类型不匹配");
} else if (e instanceof MaxUploadSizeExceededException) {
result = ResponseUtil.fail(Collections.EMPTY_MAP, "请不要上传超过10MB的文件");
} else if (e instanceof HttpRequestMethodNotSupportedException) {
result = ResponseUtil.fail(Collections.EMPTY_MAP, "不支持该类型的请求");
} else if (e instanceof MethodArgumentNotValidException) {
result = ResponseUtil.fail(Collections.EMPTY_MAP, ((MethodArgumentNotValidException) e).getBindingResult().getFieldError().getDefaultMessage());
} else if (e instanceof BindException) {
result = ResponseUtil.fail(Collections.EMPTY_MAP, ((BindException) e).getBindingResult().getFieldError().getDefaultMessage());
} else {
result = ResponseUtil.fail(Collections.EMPTY_MAP, CommonCode.OPER_BASE_FAILD);
}
log.error("异常信息:{}", Optional.ofNullable(baseException).filter(e1 -> e1.getMsgCode() != null).map(b -> b.getMsgCode().getMessage()).orElse(e.getMessage()));
e.printStackTrace();
try (PrintWriter printWriter = response.getWriter()) {
printWriter.write(OBJECT_MAPPER.writeValueAsString(result));
} catch (IOException e1) {
}
return null;
}
@ExceptionHandler(value = Exception.class)
@ResponseBody
public Object defaultErrorHandler(Exception e) {
if (e instanceof NoHandlerFoundException) {
return ResponseUtil.fail(Collections.EMPTY_MAP, CommonCode.OPER_NOTFOUND);
} else {
return ResponseUtil.fail(Collections.EMPTY_MAP, CommonCode.OPER_BASE_FAILD);
}
}在application.yml中添加以下配置来告诉springboot不要建默认的资源映射
spring.mvc.throw-exception-if-no-handler-found=true
spring.resources.add-mappings=false=============================================================================================上面这个方案是可以，但是很多时候我们项目中都会用swagger来自动帮我们生成文档，如果按照那个方案的话，你会发现swagger失效。这里我贴出我的终极解决方案
只需要在你的拦截器里面添加这个代码就行：
Integer statusCode = (Integer) request
.getAttribute("javax.servlet.error.status_code");
if (statusCode != null) {
switch (statusCode) {
case 404:
throw new NoHandlerFoundException(request.getMethod(),request.getRequestURI(),HttpHeaders.EMPTY);
case 500:
throw new Exception("");
}
}