Zuul服务网关的自定义异常过滤器

一时失言乱红尘 2023-01-05 12:22 151阅读 0赞

在springcloud中，网关发生异常时，我们需要自定义返回的异常信息给用户看

那么我们就需要自定义异常过滤器了

首先我们需要停用内置的默认异常处理器SendErrorFilter，不然还是走的他默认的异常过滤器

在yml中的配置为：

zuul:
      SendErrorFilter:
        error:
          disable: true

可以继承SendErrorFilter 类，也可以继承ZuulFilter类，实现结果都一样

package com.qiangqiang.filter;
    
    import com.netflix.zuul.context.RequestContext;
    import org.springframework.cloud.netflix.zuul.filters.post.SendErrorFilter;
    import org.springframework.http.MediaType;
    import org.springframework.stereotype.Component;
    import org.springframework.util.ReflectionUtils;
    
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    
    /**
     * \* Created with IntelliJ IDEA.
     * \* @author: xiyue
     * \* Date: 2021/1/12
     * \* Time: 13:16
     * \* To change this template use File | Settings | File Templates.
     * \* Description:
     * \
     */
    @Component
    public class CustomSendErrorFilter extends SendErrorFilter {
        @Override
        public String filterType() {
            return super.filterType();
        }
    
        @Override
        public int filterOrder() {
            return super.filterOrder();
        }
    
        @Override
        public boolean shouldFilter() {
            return super.shouldFilter();
        }
    
        @Override
        public Object run() {
            RequestContext ctx = RequestContext.getCurrentContext();
            HttpServletResponse response = ctx.getResponse();
            try {
                int responseStatusCode = ctx.getResponseStatusCode();
                // 此处自定义响应体start
                String cumstomBody = "{当前服务出现异常}";//内容省略...
                // 此处自定义响应体end
                response.setStatus(ctx.getResponseStatusCode());
                response.setContentType(MediaType.APPLICATION_JSON_UTF8_VALUE);
                response.getOutputStream().write(cumstomBody.getBytes());
            } catch (IOException e) {
                ReflectionUtils.rethrowRuntimeException(e);
            }
            return null;
        }
    }