从零搭建开发脚手架 Spring Boot捕获404异常

刺骨的言语ヽ痛彻心扉 2023-01-13 04:04 54阅读 0赞

## 前言 ##

Spring Boot的全局拦截器`@ControllerAdvice + @ExceptionHandle`无法捕获`404`异常。默认返回`/error`接口的内容.

## 默认实现 ##

@Controller
    @RequestMapping("${server.error.path:${error.path:/error}}")
    public class BasicErrorController extends AbstractErrorController { 
    	xxx
    	@RequestMapping(produces = MediaType.TEXT_HTML_VALUE)
    	public ModelAndView errorHtml(HttpServletRequest request, HttpServletResponse response) { 
    		HttpStatus status = getStatus(request);
    		Map<String, Object> model = Collections
    				.unmodifiableMap(getErrorAttributes(request, getErrorAttributeOptions(request, MediaType.TEXT_HTML)));
    		response.setStatus(status.value());
    		ModelAndView modelAndView = resolveErrorView(request, response, status, model);
    		return (modelAndView != null) ? modelAndView : new ModelAndView("error", model);
    	}
    
    	@RequestMapping
    	public ResponseEntity<Map<String, Object>> error(HttpServletRequest request) { 
    		HttpStatus status = getStatus(request);
    		if (status == HttpStatus.NO_CONTENT) { 
    			return new ResponseEntity<>(status);
    		}
    		Map<String, Object> body = getErrorAttributes(request, getErrorAttributeOptions(request, MediaType.ALL));
    		return new ResponseEntity<>(body, status);
    	}
        xxx
    }

## 解决方案 ##

自定义异常处理类实现`ErrorController`覆盖默认的实现即可。

@RestController
    @Slf4j
    public class DefaultUncaughtErrorControllor implements ErrorController { 
    
        @RequestMapping("/error")
        public Response error(HttpServletRequest request, HttpServletResponse response) { 
            HttpStatus statusCode = getHttpStatusCode(request);
            String uri = (String) request.getAttribute(RequestDispatcher.ERROR_REQUEST_URI);
            log.error("error,code:{},uri:{}", statusCode.value(), uri);
            return Response.error(statusCode.value(), "未找到接口", uri);
        }
    
        private HttpStatus getHttpStatusCode(HttpServletRequest request) { 
            try { 
                Integer statusCode = (Integer) request.getAttribute(RequestDispatcher.ERROR_STATUS_CODE);
                if (statusCode == null) { 
                    return HttpStatus.INTERNAL_SERVER_ERROR;
                }
                return HttpStatus.valueOf(statusCode);
            } catch (Exception e) { 
                return HttpStatus.INTERNAL_SERVER_ERROR;
            }
        }
        @Override
        public String getErrorPath() { 
            return null;
        }
    }

**结果**：

{ 
    	code: 404,
    	msg: "未找到接口",
    	data: "/do35"
    }

参考：

*  https://segmentfault.com/a/1190000021259215