出现问题

问题1：pom.xml中有标红

解决方法：等一下就好了，它之前可能没有下载完成

问题2：Zull无法注册到Eureka Server中

解决方法：是因为在application.yml文件中http都写成了https

主要工作

1.只使用单节点的Eureka Server

2.新建模块

3.配置pom.xml文件


   
       
            
     
      imooc-ad
             
     
      com.imooc.ad
             
     
      1.0-SNAPSHOT
         
        
    
     4.0.0
        
    
     ad-gateway
        
    
     1.0-SNAPSHOT
        
    
     jar
        
        
    
     ad-gateway
        
    
     ad-gateway
        
            
             
                 
      
       org.springframework.cloud
                  
      
       spring-cloud-starter-netflix-eureka-client
              
             
             
                 
      
       org.springframework.cloud
                  
      
       spring-cloud-starter-netflix-zuul
              
         
        
        
            
                 
                      
       
        org.springframework.boot
                       
       
        spring-boot-maven-plugin
                   
              
         
            
            
     
      8
             
     
      8

4.编写网关启动程序

package com.imooc.ad;@EnableZuulProxy@SpringCloudApplicationpublic class ZuulGatewayApplication {    public static void main(String[] args){        SpringApplication.run(ZuulGatewayApplication.class,args);    }}

5.编写配置文件yml

server:  port: 9000spring:  application:    name: ad-gatewayeureka:  client:    server-url:      defaultZone: http://server1:8000/eureka

6.自定义网关过滤器

（1）新建包

（2）新建PreRequestFilter

package com.imooc.ad.filter;import com.netflix.zuul.ZuulFilter;import com.netflix.zuul.context.RequestContext;import com.netflix.zuul.exception.ZuulException;import lombok.extern.slf4j.Slf4j;import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;import org.springframework.stereotype.Component;@Slf4j@Componentpublic class PreRequestFilter extends ZuulFilter {    @Override    public String filterType() {        return FilterConstants.PRE_TYPE;    }    @Override    public int filterOrder() {        return 0;    }    @Override    public boolean shouldFilter() {        return true;    }    @Override    public Object run() throws ZuulException {        RequestContext ctx = RequestContext.getCurrentContext();        ctx.set("startTime",System.currentTimeMillis());        return null;    }}

（3）新建AccessLogFilter(POST类型的Filter)

package com.imooc.ad.filter;import com.netflix.zuul.ZuulFilter;import com.netflix.zuul.context.RequestContext;import com.netflix.zuul.exception.ZuulException;import lombok.extern.slf4j.Slf4j;import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;import org.springframework.stereotype.Component;import javax.servlet.http.HttpServletRequest;@Slf4j@Componentpublic class AcessLogFilter extends ZuulFilter {    @Override    public String filterType() {        return FilterConstants.POST_TYPE;    }    @Override    public int filterOrder() {        return FilterConstants.SEND_RESPONSE_FILTER_ORDER - 1;//系统的最后一个 post 过滤器执行之前    }    @Override    public boolean shouldFilter() {        return true;    }    @Override    public Object run() throws ZuulException {        RequestContext ctx = RequestContext.getCurrentContext();        HttpServletRequest  request = ctx.getRequest();        Long startTime = (Long)ctx.get("startTime");        String url = request.getRequestURI();        long duration = System.currentTimeMillis() - startTime;        log.info("url: " + url + ": duration" + duration / 100 + "ms");        return null;    }}

7.启动Eureka Server