Spring Cloud Zuul服务网关

服务网关

API网关可以对所有的API请求进行统一的管理和维护，相当于为系统开放出一个统一的接口，所有的外部的请求只需要统一的访问这个外部接口即可，系统内部再通过API网关映射不同的微服务。

对于开发者就不需要关注具体的微服务URL，直接访问网关即可

三：Spring Cloud Zuul

1.创建模块，配置环境

<?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>springCloud01</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>gateway</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
    </dependencies>
</project>

2.application.yml

server:
  port: 8030
spring:
  application:
    name: gateway
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
  instance:
    prefer-ip-address: true
zuul:
  routes:
    provider: /p/**

3.启动类：

package com.southwind;

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

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

}

网关不仅可以路由映射，还自带了负载均衡