springboot继承AbstractErrorController实现全局的异常处理

项目中常常需要一个全局异常，防止未处理的异常信息直接暴露给用户，影响用户体验。springboot中可以使用ControllerAdvice和ExceptionHandler这两个注解来做全局异常，这种方式比较便捷，但是也有一个问题：
ContollerAdvice只能拦截控制器中的异常，换言之，只能拦截500之类的异常，但是对于404这样不会进入控制器处理的异常不起作用。所以我仿造springboot默认的全局处理类BasicController实现全局的异常处理，这样就能很好的按照自己的需求处理异常了。

我们先了解一下springboot默认的异常处理是怎样的：
springboot会将所有的异常发送到路径为server.error.path（application.properties中可配置，默认为”/error”）的控制器方法中进行处理，页面请求和ajax请求会分别打到对应的处理方法上。具体的处理可查看BasicErrorController的源代码：

    @RequestMapping(produces = "text/html")
    public ModelAndView errorHtml(HttpServletRequest request,
            HttpServletResponse response) {
        HttpStatus status = getStatus(request);
        Map<String, Object> model = Collections.unmodifiableMap(getErrorAttributes(
                request, isIncludeStackTrace(request, MediaType.TEXT_HTML)));
        response.setStatus(status.value());
        ModelAndView modelAndView = resolveErrorView(request, response, status, model);
        return (modelAndView != null) ? modelAndView : new ModelAndView("error", model);
    }

    @RequestMapping
    @ResponseBody
    public ResponseEntityString, Object>> error(HttpServletRequest request) {
        Map<String, Object> body = getErrorAttributes(request,
                isIncludeStackTrace(request, MediaType.ALL));
        HttpStatus status = getStatus(request);
        return new ResponseEntity<>(body, status);
    }

了解完springboot的默认全局异常处理后，开始仿造着写自定义的异常处理，BasicErrorController继承了AbstractErrorController，所以我们也继承AbstractErrorController。整体代码如下：

@Controller
@RequestMapping("${server.error.path:${error.path:/error}}")
@Slf4j
public class GlobalExceptionController extends AbstractErrorController{
    private final ErrorProperties errorProperties;
    @Autowired
    public GlobalExceptionController(ErrorAttributes errorAttributes,ServerProperties serverProperties) {
        super(errorAttributes);
        this.errorProperties=serverProperties.getError();
    }

    @Override
    public String getErrorPath() {
        return errorProperties.getPath();
    }

    @RequestMapping(produces = "text/html")
    public ModelAndView errorHtml(HttpServletRequest request,
            HttpServletResponse response) {
        ModelAndView modelAndView=new ModelAndView("error");
        Map errorMap=getErrorAttributes(request, isIncludeStackTrace(request, MediaType.ALL));
        if(errorMap!=null) {
            /*timestamp status error message path*/
            modelAndView.addObject("msg",errorMap.get("error"));
            modelAndView.addObject("statusCode",errorMap.get("status"));
            logHandler(errorMap);
        }
        return modelAndView;
    }

    @RequestMapping
    @ResponseBody
    public ServiceResponse