zuul 自定义异常处理

谁借莪１个温暖的怀抱￠ 2023-07-17 12:58 18阅读 0赞

# zuul 自定义异常处理 #

两种方式  
1.自定义error错误页面

我这里是返回的json信息

2.禁用zuul默认的异常处理filter---SendErrorFilter  
在yml中设置  
zuul:  
SendErrorFilter:  
error:  
disable:true  
然后自定义errorfilter

public class ErrorFilter extends ZuulFilter {
     
        private static final Logger logger = LoggerFactory.getLogger(ErrorFilter.class);
     
        @Override
        public String filterType() {
            return "error";
        }
     
        @Override
        public int filterOrder() {
            return 0;
        }
     
        @Override
        public boolean shouldFilter() {
            return true;
        }
     
        @Override
        public Object run() throws ZuulException {
            try {
                RequestContext context = RequestContext.getCurrentContext();
                ZuulException exception = this.findZuulException(context.getThrowable());
                logger.error("进入系统异常拦截", exception);
     
                HttpServletResponse response = context.getResponse();
                response.setContentType("application/json; charset=utf8");
                response.setStatus(exception.nStatusCode);
                PrintWriter writer = null;
                try {
                    writer = response.getWriter();
                    writer.print("{code:"+ exception.nStatusCode +",message:\""+ exception.getMessage() +"\"}");
                } catch (IOException e) {
                    e.printStackTrace();
                } finally {
                    if(writer!=null){
                        writer.close();
                    }
                }
     
            } catch (Exception var5) {
                ReflectionUtils.rethrowRuntimeException(var5);
            }
     
            return null;
        }
     
        ZuulException findZuulException(Throwable throwable) {
            if (ZuulRuntimeException.class.isInstance(throwable.getCause())) {
                return (ZuulException)throwable.getCause().getCause();
            } else if (ZuulException.class.isInstance(throwable.getCause())) {
                return (ZuulException)throwable.getCause();
            } else {
                return ZuulException.class.isInstance(throwable) ? (ZuulException)throwable : new ZuulException(throwable, 500, (String)null);
            }
        }
    }

可以看看SendErrorFilter这个类的源码,这是zuul的默认异常处理类

今天处理异常发现404不走过滤器

还是走的errorcontroller

/**
     * 自定义error错误页面
     * @author zhiguang
     */
    @RestController
    public class ErrorHandlerController implements ErrorController {
     
        /**
         * 出异常后进入该方法，交由下面的方法处理
         */
        @Override
        public String getErrorPath() {
            return "/error";
        }
     
        @RequestMapping("/error")
        public Object error(HttpServletRequest request, HttpServletResponse response){
            //
            /*RequestContext ctx = RequestContext.getCurrentContext();
            ZuulException exception = (ZuulException)ctx.getThrowable();
            return Result.choose(exception.nStatusCode, exception.getMessage());*/
            Integer status = (Integer)request.getAttribute("javax.servlet.error.status_code");
            return Result.choose(status, status == 404 ? "访问地址不存在" : "内部服务器错误,正在处理");
        }
     
    }

可以查看BasicErrorController;类的源码