1 Zuul是什么？

• Zuul包含了对请求的路由和过滤的功能。
• 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。
• 过滤器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，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。

2 Zuul能干什么？

• 路由。
• 过滤。

3 入门

1、新建module

2、pom.xml

<?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>springcloud</artifactId>
        <groupId>com.xianhuii</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-zuul-9527</artifactId>
    <dependencies>
        <!--zuul-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zuul</artifactId>
            <version>1.4.7.RELEASE</version>
        </dependency>
        <!--Hystrix-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
            <version>1.4.7.RELEASE</version>
        </dependency>
        <!--dashboard-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
            <version>1.4.7.RELEASE</version>
        </dependency>
        <!--Ribbon-->
        <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-ribbon -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
            <version>1.4.7.RELEASE</version>
        </dependency>
        <!--Eureka-->
        <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-eureka -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
            <version>1.4.7.RELEASE</version>
        </dependency>
        <!-- 实体类 -->
        <dependency>
            <groupId>com.xianhuii</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- Web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- 热部署 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

</project>

3、application.yaml

server:
  port: 9527
spring:
  application:
    name: springcloud-zuul-gateway
eureka:
  client:
    service-url:
      defaultZone: http://localhost:7001/eureka/,http://localhost:7002/eureka/,http://localhost:7003/eureka/
  instance:
    instance-id: zuul9527.com
    prefer-ip-address: true
info:
  app.name: xianhuii-springcloud
  company.name: xianhuii.com
zuul:
  routes: # 映射路由
    mydept.serviceId: springcloud-provider-dept
    mydept.path: /mydept/**
  ignored-services: *   # 隐藏所有原本路径，一般都会配置
  prefix: xianhuii    # 增加统一访问权限，可选（xianhuii/mydept/**）

4、启动类

package com.xianhuii.springcloud;

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

@EnableZuulProxy    // 开启Zuul
@SpringBootApplication
public class ZuulApplication_9527 {
    public static void main(String[] args) {
        SpringApplication.run(ZuulApplication_9527.class, args);
    }
}