是什么

Zuul包含了对请求路由和过滤两个最主要的功能：

其中路由功能负责将外部请求转发到具体的微服务实例上，是实现外部访问统一入口的基础。而过滤功能则负责对请求的处理过程进行干预，是实现请求校验、服务聚合等功能的基础。Zuul和Eureka进行整合，将zuul自身注册为Eureka服务治理下的应用，同时从Eureka中获得其他微服务的消息，也即以后的访问微服务都是通过zuul跳转后获得。

注意：zuul服务最终还是会注册进Eureka

提供=代理+路由+过滤三大功能

基本配置

1.  创建maven工程micoservicecloud-zuul-gateway-9527

2.  配置其pom.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>micoservicecloud</artifactId>
        <groupId>com.minn.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>micoservicecloud-zuul-gateway-9527</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>com.minn.springcloud</groupId>
            <artifactId>micoservicecloud-api</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zuul</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>
    </dependencies>
</project>

3.  配置其application.yml

server:
  port: 9527

spring:
  application:
    name: micoservicecloud-zuul-gateway
eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka,http://eureka7003.com:7003/eureka
    instance:
      instance-id: gateway.com
      prefer-ip-address: true

info:
  app.name: minn-microservicecloud
  company.name: www.minn.com
  build.artifactId: $project.artifactId$
  build.version: $project.version$

4. 创建启动类

package com.minn.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;

@SpringBootApplication
@EnableZuulProxy
public class Zuul_App {
    public static void main(String[] args) {
        SpringApplication.run(Zuul_App.class,args);
    }
}

5.  启动三个eureka集群，一个服务提供类micoservicecloud-provider-dept-8001，一个路由。

6.  在本地hosts文件添加：

localhost        myzuul.com

7. 启用路由

http://myzuul.com:9527/microservicecloud-dept/dept/get/1

访问映射规则

统一更改路由访问路径：

zuul:
  routes:
    mydept.serviceId: microservicecloud-dept #http://myzuul.com:9527/microservicecloud-dept/dept/get/1
    mydept.path: /mydept/**                   #将上面的路径中microservicecloud-dept变为mydept
  ignored-services: "*"         #屏蔽http://myzuul.com:9527/microservicecloud-dept这个访问路径，"*" 代表多个微服务名
  prefix: /minn                   #统一访问路径：http://myzuul.com:9527/minn/mydept/dept/get/1