SpringCloud Finchley+Spring Boot 2.0 集成Consul的方法示例(1.2版本)

概述：

Spring Boot 2.0相对于之前的版本，变化还是很大的。首先对jdk的版本要求已经不能低于1.8，其次依赖的spring的版本也是最新版本5.0，并集成了功能强大的webflux等。

SpringCloud Finchley 版本的升级也带来了全新组件：Spring Cloud Function 和 Spring Cloud Gateway ,前者致力于函数式编程模块的整合，后者则是网关netflix zuul 的替换组件。

1）需要的依赖：

<?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">
 <modelVersion>4.0.0</modelVersion>

 <groupId>com.iyb</groupId>
 <artifactId>saturn</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <packaging>jar</packaging>

 <name>sc-saturn</name>
 <description>sc-saturn for Spring Boot</description>

 <parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.0.1.RELEASE</version>
 </parent>

 <properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  <java.version>1.8</java.version>
  <mapper.version>3.4.0</mapper.version>
  <pagehelper.version>4.1.6</pagehelper.version>
  <fastjson.version>1.2.13</fastjson.version>
  <jackson.version>2.8.5</jackson.version>
  <druid.version>1.0.27</druid.version>
  <mysql.version>5.1.40</mysql.version>
  <commons-fileupload.version>1.3.1</commons-fileupload.version>
 </properties>

 <dependencies>

  <!--starter begin-->
  <!--spring cloud starter-->

  <dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-consul-discovery</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-config</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-openfeign</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
  </dependency>
  <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-ribbon</artifactId>
  </dependency>
   <dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-sleuth</artifactId>
  </dependency>

  <!--tomcat starter-->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-tomcat</artifactId>
   <scope>provided</scope>
  </dependency>
  <dependency>
   <groupId>org.apache.tomcat.embed</groupId>
   <artifactId>tomcat-embed-jasper</artifactId>
   <scope>compile</scope>
  </dependency>
   <!--actuator starter-->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-actuator</artifactId>
  </dependency>

  <!--spring boot starter-->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter</artifactId>
  </dependency>

  <!--spring starter-->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-jdbc</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-aop</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-redis</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
  </dependency>

  <!--fastjon-->
  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>fastjson</artifactId>
   <version>${fastjson.version}</version>
  </dependency>

  <dependency>
   <groupId>io.github.openfeign</groupId>
   <artifactId>feign-gson</artifactId>
   <version>9.3.1</version>
  </dependency>

  <!--lombok-->
  <dependency>
   <groupId>org.projectlombok</groupId>
   <artifactId>lombok</artifactId>
  </dependency>

  <dependency>
   <groupId>log4j</groupId>
   <artifactId>log4j</artifactId>
   <version>1.2.17</version>
  </dependency>

  <dependency>
   <groupId>commons-beanutils</groupId>
   <artifactId>commons-beanutils</artifactId>
  </dependency>
  <dependency>
   <groupId>commons-collections</groupId>
   <artifactId>commons-collections</artifactId>
  </dependency>
  <dependency>
   <groupId>org.apache.commons</groupId>
   <artifactId>commons-lang3</artifactId>
   <version>3.4</version>
  </dependency>
  <dependency>
   <groupId>com.netflix.feign</groupId>
   <artifactId>feign-gson</artifactId>
   <version>8.15.1</version>
  </dependency>

 </dependencies>

 // Spring Cloud Finchley.RELEASE
 <dependencyManagement>
  <dependencies>
   <dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-dependencies</artifactId>
    <version>Finchley.RELEASE</version>
    <type>pom</type>
    <scope>import</scope>
   </dependency>
  </dependencies>
 </dependencyManagement>

</project>

需要注意的地方：

部分依赖做了改变：

新版本的 SpringCloud 上面的依赖都发生了变化，依赖中都引入了 netflix，或许是为了声明吧（组件的实现底层并非spring）。

log4j依赖：

在spring cloud之前的版本中，日志只需要引入lombok即可，但是Finchley版本需要单独的引用。

<!--lombok-->
  <dependency>
   <groupId>org.projectlombok</groupId>
   <artifactId>lombok</artifactId>
  </dependency>

  <dependency>
   <groupId>log4j</groupId>
   <artifactId>log4j</artifactId>
   <version>1.2.17</version>
  </dependency>

2）集成consul配置文件：

spring:
 application:
 name: sc-saturn
 profiles:
 active: dev

 cloud:
 config:
#  uri: http://localhost:9999
  discovery:
  enabled: false
  serviceId: sc-earth-config-server
  label: master
  profile: pre
 consul:
  host: http://localhost:8500
  port: 80
  discovery:
   prefer-ip-address: true
   #这里是重写健康检查的endPoint，默认为 /health，重写是为了节省不必要的网络传输，只需要http 200状态码即可
   health-check-path: /ok/health
   heartbeat:
   enabled: false

3）启动类：

@SpringBootApplication
@EnableFeignClients
@EnableZuulServer
@ComponentScan(basePackages={"com.iyb.ak"})
@EnableDiscoveryClient
@Slf4j
public class SaturnApplication implements CommandLineRunner{

 public static void main(String[] args) {
  SpringApplication.run(SaturnApplication.class, args);
 }

 @Override
 public void run(String... args) throws Exception {
  log.info(">>>>>>>>>>>>>>> sc-saturn 启动完成<<<<<<<<<<<<<");
 }
}

4）示例：

注册中心：

可以看到 sc-saturn 已经成功注册到 consul中了。另外，上面的consul ui界面发生了变化，这是1.2版本做出的优化，相较以前的ui界面，已经好看很多了。

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