SpringCloud使用

9、完整步骤

9.0、SQL

CREATE DATABASE /*!32312 IF NOT EXISTS*/`clouddb01` /*!40100 DEFAULT CHARACTER SET utf8mb4 */;
USE `clouddb01`;
/*Table structure for table `dept` */
DROP TABLE IF EXISTS `dept`;
CREATE TABLE `dept` (
  `deptno` int(11) NOT NULL,
  `dname` varchar(50) DEFAULT NULL,
  `db_source` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`deptno`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
/*Data for the table `dept` */
insert  into `dept`(`deptno`,`dname`,`db_source`) values (10,'人力部','db01'),(20,'技术部','db01'),(30,'财务','db01');

9.1、父工程POM

<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.yjiu.cloud</groupId>
  <artifactId>microservicecloud-parent</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <junit.version>4.12</junit.version>
    <log4j.version>1.2.17</log4j.version>
    <lombok.version>1.16.18</lombok.version>
  </properties>
 
  <dependencyManagement>
    <dependencies>
       <dependency>
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-dependencies</artifactId>
         <version>Dalston.SR1</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
       <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-dependencies</artifactId>
         <version>1.5.9.RELEASE</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
       <dependency>
         <groupId>mysql</groupId>
         <artifactId>mysql-connector-java</artifactId>
         <version>5.0.4</version>
       </dependency>
       <dependency>
         <groupId>com.alibaba</groupId>
         <artifactId>druid</artifactId>
         <version>1.0.31</version>
       </dependency>
       <dependency>
         <groupId>org.mybatis.spring.boot</groupId>
         <artifactId>mybatis-spring-boot-starter</artifactId>
         <version>1.3.0</version>
       </dependency>
       <dependency>
         <groupId>ch.qos.logback</groupId>
         <artifactId>logback-core</artifactId>
         <version>1.2.3</version>
       </dependency>
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
         <version>${junit.version}</version>
         <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>log4j</groupId>
         <artifactId>log4j</artifactId>
         <version>${log4j.version}</version>
       </dependency>
    </dependencies>
  </dependencyManagement>
 
  <build>
    <finalName>microservicecloud</finalName>
    <resources>
       <resource>
         <directory>src/main/resources</directory>
         <filtering>true</filtering>
       </resource>
    </resources>
    <plugins>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-resources-plugin</artifactId>
         <configuration>
           <delimiters>
             <delimit>$</delimit>
           </delimiters>
         </configuration>
       </plugin>
    </plugins>
  </build>
</project>

9.2、microservicecloud-api工程

9.2.1、工程图

9.2.2、POM文件

<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>
  <parent>
    <groupId>com.yjiu.cloud</groupId>
    <artifactId>microservicecloud-parent</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>microservicecloud-api</artifactId><!-- 当前Module我自己叫什么名字 -->
  <dependencies><!-- 当前Module需要用到的jar包，按自己需求添加，如果父类已经包含了，可以不用写版本号 -->
    <dependency>
       <groupId>org.projectlombok</groupId>
       <artifactId>lombok</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-feign</artifactId>
    </dependency>
  </dependencies>
</project>

9.2.3、POJO

package com.yjiu.cloud.pojo;
import java.io.Serializable;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
@NoArgsConstructor
@AllArgsConstructor
@Data
@Accessors(chain=true)
public class Dept implements Serializable// entity --orm--- db_table
{
  private Long   deptno; // 主键
  private String dname; // 部门名称
  private String db_source;// 来自那个数据库，因为微服务架构可以一个服务对应一个数据库，同一个信息被存储到不同数据库
  
  public Dept(String dname)
  {
    super();
    this.dname = dname;
  }
}

9.2.3、Service接口层【@FeignClient()】

package com.yjiu.cloud.service;
import java.util.List;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.yjiu.cloud.pojo.Dept;
/**
  面向接口
  新建一个实现了FallbackFactory接口的类DeptClientServiceFallbackFactory
 */   
//服务降级:fallbackFactory=DeptClientServiceFallbackFactory.class
@FeignClient(value = "MICROSERVICECLOUD-DEPT",fallbackFactory=DeptClientServiceFallbackFactory.class)
public interface DeptClientService
{
  @RequestMapping(value = "/dept/get/{id}", method = RequestMethod.GET)
  public Dept get(@PathVariable("id") long id);
 
  @RequestMapping(value = "/dept/list", method = RequestMethod.GET)
  public List<Dept> list();
 
  @RequestMapping(value = "/dept/add", method = RequestMethod.POST)
  public boolean add(Dept dept);
}

9.2.4、服务降级处理

DeptClientServiceFallbackFactory.java

package com.yjiu.cloud.service;
import java.util.List;
import org.springframework.stereotype.Component;
import com.yjiu.cloud.pojo.Dept;
import feign.hystrix.FallbackFactory;
@Component // 不要忘记添加，不要忘记添加
public class DeptClientServiceFallbackFactory implements FallbackFactory<DeptClientService>{
  @Override
  public DeptClientService create(Throwable throwable){
    return new DeptClientService() {
       @Override
       public Dept get(long id)
       {
         return new Dept().setDeptno(id).setDname("该ID：" + id + "没有没有对应的信息,Consumer客户端提供的降级信息,此刻服务Provider已经关闭")
         .setDb_source("no this database in MySQL");
       }
       @Override
       public List<Dept> list()
       {
         return null;
       }
       @Override
       public boolean add(Dept dept)
       {
         return false;
       }
    };
  }
}

9.3、Eureka服务注册中心+Ribbon+Feign+Hystrix

9.3.1、Eureka-Server端

9.3.1.1、工程图

9.3.1.2、POM文件

<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>
  <parent>
    <groupId>com.yjiu.cloud</groupId>
    <artifactId>microservicecloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>microservicecloud-eureka-7001</artifactId>
  <dependencies>
    <!--*******eureka-server服务端 ******-->
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-eureka-server</artifactId>
    </dependency>
    <!-- 修改后立即生效，热部署 -->
    <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>springloaded</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-devtools</artifactId>
    </dependency>
  </dependencies>
</project>

9.3.1.3、application.yml

server: 
  port: 7001
 
eureka: 
  instance:
    hostname: eureka7001.com #eureka服务端的实例名称
  client: 
    register-with-eureka: false     #false表示不向注册中心注册自己。
    fetch-registry: false     #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
    service-url: 
      #单机 defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/       
      #设置与Eureka Server交互的地址查询服务和注册服务都需要依赖这个地址（单机）。
      defaultZone: http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/

9.3.1.4、App主启动类【@EnableEurekaServer】

package com.atguigu.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@SpringBootApplication
@EnableEurekaServer // EurekaServer服务器端启动类,接受其它微服务注册进来
public class EurekaServer7001_App
{
  public static void main(String[] args)
  {
    SpringApplication.run(EurekaServer7001_App.class, args);
  }
}

9.3.1.5、集群搭建

互相注册，7001注册7002和7003，7002注册7001和7003，同理..

YML:
1、server:port:修改对应的端口号
2、eureka:instace:hostname:修改对应的域名
3、defaultZone:
7001项目上的：
      defaultZone: http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
7002项目上的：
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7003.com:7003/eureka/
7003项目上的：
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/
4、注册到Server上的项目，要修改defaultZone:

9.3.2、Eureka-Client端-服务提供者

9.3.2.1、项目图

DeptService已提取到Cloud-API工程

9.3.2.2、 POM

<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>
 
  <parent>
    <groupId>com.yjiu.cloud</groupId>
    <artifactId>microservicecloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
 
  <artifactId>microservicecloud-provider-dept-8001</artifactId>
 
  <dependencies>
    <!-- 引入自己定义的api通用包，可以使用Dept部门Entity -->
    <dependency>
       <groupId>com.yjiu.cloud</groupId>
       <artifactId>microservicecloud-api</artifactId>
       <version>${project.version}</version>
    </dependency>
    <!-- hystrix -->
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-hystrix</artifactId>
    </dependency>
    <!-- actuator监控信息完善 -->
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <!-- 将微服务provider侧注册进eureka -->
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-eureka</artifactId>
    </dependency>
<!-- 注册中心，没有此配置 -->
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-config</artifactId>
    </dependency>
    <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
    </dependency>
    <dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <dependency>
       <groupId>com.alibaba</groupId>
       <artifactId>druid</artifactId>
    </dependency>
    <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-core</artifactId>
    </dependency>
    <dependency>
       <groupId>org.mybatis.spring.boot</groupId>
       <artifactId>mybatis-spring-boot-starter</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-jetty</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
    <!-- 修改后立即生效，热部署 -->
    <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>springloaded</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-devtools</artifactId>
    </dependency>
  </dependencies>
</project>

9.3.2.3、application.yml

server:
  port: 8001
  
mybatis:
  config-location: classpath:mybatis/mybatis.cfg.xml        # mybatis配置文件所在路径
  type-aliases-package: com.yjiu.cloud.pojo    # 所有Entity别名类所在包
  mapper-locations:
  - classpath:mybatis/mapper/**/*.xml                       # mapper映射文件
    
spring:
   application:
    name: microservicecloud-dept
   datasource:
    type: com.alibaba.druid.pool.DruidDataSource            # 当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver              # mysql驱动包
    url: jdbc:mysql://localhost:3306/cloudDB01?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull # 数据库名称
    username: root
    password: mysqladmin
    dbcp2:
      min-idle: 5                                           # 数据库连接池的最小维持连接数
      initial-size: 5                                       # 初始化连接数
      max-total: 5                                          # 最大连接数
      max-wait-millis: 200                                  # 等待连接获取的最大超时时间
      
eureka:
  client: #客户端注册进eureka服务列表内
    service-url: 
      #defaultZone: http://localhost:7001/eureka
       defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/      
  instance:
    instance-id: microservicecloud-dept8001
    prefer-ip-address: true     #访问路径可以显示IP地址     
 
info: 
  app.name: atguigu-microservicecloud
  company.name: www.atguigu.com
  build.artifactId: $project.artifactId$
  build.version: $project.version$

9.3.2.4、App主启动类【@EnableDiscoveryClient】

package com.atguigu.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient //本服务启动后会自动注册进eureka服务中
@EnableDiscoveryClient //服务发现
@EnableHystrix	//启用hystrix
public class DeptProvider8001_App
{
  public static void main(String[] args)
  {
    SpringApplication.run(DeptProvider8001_App.class, args);
  }
}

9.3.2.5、Controller

package com.yjiu.cloud.controller;
@RestController
public class DeptController
{
  @Autowired
  private DeptService service;
  @Autowired
  private DiscoveryClient client;
 
  @RequestMapping(value = "/dept/add", method = RequestMethod.POST)
  public boolean add(@RequestBody Dept dept)//****注意@RequestBody
  {
    return service.add(dept);
  }
 
  @RequestMapping(value = "/dept/get/{id}", method = RequestMethod.GET)
  public Dept get(@PathVariable("id") Long id)
  {
    return service.get(id);
  }
 
  @RequestMapping(value = "/dept/list", method = RequestMethod.GET)
  public List<Dept> list()
  {
    return service.list();
  }
}

9.3.2.6、MyBatis配置

mybatis.cfg.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
</configuration>

DeptMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.yjiu.cloud.dao.DeptDao">
  <select id="findById" resultType="com.yjiu.cloud.pojo.Dept" parameterType="Long">
    select deptno,dname,db_source from dept where deptno=#{deptno};
  </select>
  <select id="findAll" resultType="com.yjiu.cloud.pojo.Dept">
    select deptno,dname,db_source from dept;
  </select>
  <insert id="addDept" parameterType="com.yjiu.cloud.pojo.Dept">
    INSERT INTO dept(dname,db_source) VALUES(#{dname},DATABASE());
  </insert>
</mapper>

DeptDao.java

package com.yjiu.cloud.dao;
import java.util.List;
import org.apache.ibatis.annotations.Mapper;
import com.yjiu.cloud.pojo.Dept;
@Mapper
public interface DeptDao{
  public boolean addDept(Dept dept);
  public Dept findById(Long id);
  public List<Dept> findAll();
}

DeptServiceImpl.java

package com.yjiu.cloud.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.yjiu.cloud.dao.DeptDao;
import com.yjiu.cloud.pojo.Dept;
import com.yjiu.cloud.service.DeptService;
@Service
public class DeptServiceImpl implements DeptService{
  @Autowired
  private DeptDao dao;
  @Override
  public boolean add(Dept dept){
    return dao.addDept(dept);
  }
  @Override
  public Dept get(Long id){
    return dao.findById(id);
  }
  @Override
  public List<Dept> list(){
    return dao.findAll();
  }
}

9.3.3、Eureka-Client端-服务消费者

9.3.3.1、项目图

9.3.3.2、POM

<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>
	<parent>
		<groupId>com.yjiu.cloud</groupId>
		<artifactId>microservicecloud-parent</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>
	<artifactId>microservicecloud-consumer-dept-80</artifactId>
	<description>部门微服务消费者</description>

	<dependencies>
		<dependency><!-- 自己定义的api -->
			<groupId>com.yjiu.cloud</groupId>
			<artifactId>microservicecloud-api</artifactId>
			<version>${project.version}</version>
		</dependency>
     <!-- hystrix -->
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-hystrix</artifactId>
    </dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-feign</artifactId>
		</dependency>
		<!-- Ribbon相关 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-ribbon</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-config</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- 修改后立即生效，热部署 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>springloaded</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
		</dependency>
	</dependencies>
</project>

9.3.3.3、application.yml

server:
  port: 80

feign: 
  hystrix: 
    enabled: true

eureka:
  client:
    register-with-eureka: false
    service-url: 
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/  

9.3.3.4、App主启动类，两种方式

9.3.3.4.1、Ribbon方式（不推荐）【@RibbonClient】

package com.yjiu.cloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.ribbon.RibbonClient;
import com.yjiu.myrule.MySelfRule;
@SpringBootApplication
@EnableEurekaClient
//在启动该微服务的时候就能去加载我们的自定义Ribbon配置类，从而使配置生效
@RibbonClient(name="MICROSERVICECLOUD-DEPT",configuration=MySelfRule.class)
public class DeptConsumer80_App{
  public static void main(String[] args){
    SpringApplication.run(DeptConsumer80_App.class, args);
  }
}

9.3.3.4.2、Feign方式【@EnableFeignClients】

package com.yjiu.cloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.feign.EnableFeignClients;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients(basePackages= {"com.yjiu.cloud"})
@ComponentScan("com.yjiu.cloud")
public class DeptConsumer80_Feign_App{
  public static void main(String[] args){
    SpringApplication.run(DeptConsumer80_Feign_App.class, args);
  }
}

9.3.3.5、Spring配置类【@LoadBalanced】

package com.yjiu.cloud.cfgbeans;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RetryRule;
@Configuration
public class ConfigBean //boot -->spring   applicationContext.xml --- @Configuration配置   ConfigBean = applicationContext.xml
{ 
  @Bean
  @LoadBalanced//Spring Cloud Ribbon是基于Netflix Ribbon实现的一套客户端 负载均衡的工具。
  public RestTemplate getRestTemplate()
  {
    return new RestTemplate();
  }
  
  @Bean
  public IRule myRule()
  {
    //return new RoundRobinRule();
    //return new RandomRule();//达到的目的，用我们重新选择的随机算法替代默认的轮询。
    return new RetryRule();
  }
}

9.3.3.6、Controller（不推荐）【Ribbon+RestTemplate】

package com.yjiu.cloud.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import com.yjiu.cloud.pojo.Dept;
@RestController
public class DeptController_Consumer
{
  //private static final String REST_URL_PREFIX = "http://localhost:8001";
  private static final String REST_URL_PREFIX = "http://MICROSERVICECLOUD-DEPT";
  /**
   * 使用 使用restTemplate访问restful接口非常的简单粗暴无脑。 (url, requestMap,
   * ResponseBean.class)这三个参数分别代表 REST请求地址、请求参数、HTTP响应转换被转换成的对象类型。
   */
  @Autowired
  private RestTemplate restTemplate;
 
  @RequestMapping(value = "/consumer/dept/add")
  public boolean add(Dept dept)
  {
    return restTemplate.postForObject(REST_URL_PREFIX + "/dept/add", dept, Boolean.class);
  }
 
  @RequestMapping(value = "/consumer/dept/get/{id}")
  public Dept get(@PathVariable("id") Long id)
  {
    return restTemplate.getForObject(REST_URL_PREFIX + "/dept/get/" + id, Dept.class);
  }
 
  @SuppressWarnings("unchecked")
  @RequestMapping(value = "/consumer/dept/list")
  public List<Dept> list()
  {
    return restTemplate.getForObject(REST_URL_PREFIX + "/dept/list", List.class);
  }
  // 测试@EnableDiscoveryClient,消费端可以调用服务发现
  @RequestMapping(value = "/consumer/dept/discovery")
  public Object discovery()
  {
    return restTemplate.getForObject(REST_URL_PREFIX + "/dept/discovery", Object.class);
  }
}

9.3.3.7、Controller【接口+Feign】

package com.yjiu.cloud.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.yjiu.cloud.pojo.Dept;
import com.yjiu.cloud.service.DeptClientService;
@RestController
public class DeptController_Consumer{
  /**重点区别：之前用restTemplate，现在用接口**/
  @Autowired
  private DeptClientService service;
  @RequestMapping(value = "/consumer/dept/get/{id}")
  public Dept get(@PathVariable("id") Long id)
  {
    return this.service.get(id);
  }
  @RequestMapping(value = "/consumer/dept/list")
  public List<Dept> list()
  {
    return this.service.list();
  }
  @RequestMapping(value = "/consumer/dept/add")
  public Object add(Dept dept)
  {
    return this.service.add(dept);
  }
}

9.3.3.8、切换负载均衡

package com.yjiu.myrule;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RandomRule;
@Configuration
public class MySelfRule{
  @Bean
  public IRule myRule(){
    return new RandomRule();// Ribbon默认是轮询，我自定义为随机
    //return new RoundRobinRule();// Ribbon默认是轮询，我自定义为随机
//    return new RandomRule_ZY();// 我自定义为每台机器5次
  }
}

9.4、Zuul

豪猪Hystrix Dashboard

9.4.1、工程图

9.4.2、POM文件

<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>
  <parent>
    <groupId>com.atguigu.springcloud</groupId>
    <artifactId>microservicecloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>microservicecloud-zuul-gateway-9527</artifactId>
  <dependencies>
    <!-- *****zuul路由网关***** -->
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-zuul</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-eureka</artifactId>
    </dependency>
    <!-- actuator监控 -->
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <!-- hystrix容错 -->
    <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>
    <!-- 日常标配 -->
    <dependency>
       <groupId>com.atguigu.springcloud</groupId>
       <artifactId>microservicecloud-api</artifactId>
       <version>${project.version}</version>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-jetty</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
    <!-- 热部署插件 -->
    <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>springloaded</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-devtools</artifactId>
    </dependency>
  </dependencies>
</project>

9.4.3、主启动类

package com.yjiu.cloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
@SpringBootApplication
@EnableZuulProxy
public class Zuul_9527_StartSpringCloudApp
{
  public static void main(String[] args)
  {
    SpringApplication.run(Zuul_9527_StartSpringCloudApp.class, args);
  }
}
 

9.4.4、application.yml

server: 
  port: 9527
 
spring: 
  application:
    name: microservicecloud-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-9527.com
    prefer-ip-address: true 

zuul: 
  prefix: /atguigu			#配合使用，通过http://localhost/atguigu/mydept/consumer/dept/list访问
  ignored-services: "*"	#禁止通过【服务名】访问
  #ignored-services: microservicecloud-dept  #禁止通过【服务名】访问：http://localhost/microservicecloud-dept/consumer/dept/list访问
  routes: 
    mydept.serviceId: microservicecloud-dept
    mydept.path: /mydept/**		#只有这个，通过http://localhost/mydept/consumer/dept/list访问
 
info:
  app.name: atguigu-microcloud
  company.name: www.atguigu.com
  build.artifactId: $project.artifactId$
  build.version: $project.version$

9.5、分布式配置中心

9.5.1、GitHub上建立配置文件仓库

GitHub建完库，拉取到本地，新建配置文件application.yml，并提交

spring: 
   profiles: 
       active: dev 
---
spring: 
   profiles: dev #开发环境
   application:  
       name: cloud-config-dev
---
spring: 
   profile: test
   application: 
       name: cloud-config-test

9.5.2、Config-Server

9.5.2.1、项目图

9.5.2.2、POM文件

<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>
 
  <parent>
    <groupId>com.yjiu.cloud</groupId>
    <artifactId>microservicecloud-parent</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
 
  <artifactId>microservicecloud-config-3344</artifactId>
 
 
  <dependencies>
    <!-- springCloud Config -->
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-config-server</artifactId>
    </dependency>
    <!-- 避免Config的Git插件报错：org/eclipse/jgit/api/TransportConfigCallback -->
    <dependency>
       <groupId>org.eclipse.jgit</groupId>
       <artifactId>org.eclipse.jgit</artifactId>
       <version>4.10.0.201712302008-r</version>
    </dependency>
    <!-- 图形化监控 -->
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <!-- 熔断 -->
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-hystrix</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-eureka</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-config</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-jetty</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
    <!-- 热部署插件 -->
    <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>springloaded</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-devtools</artifactId>
    </dependency>
  </dependencies>
</project>

9.5.2.3、App主启动类[@EnableConfigServer]

package com.yjiu.cloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
@SpringBootApplication
@EnableConfigServer
public class Config_3344_StartSpringCloudApp{
  public static void main(String[] args){
    SpringApplication.run(Config_3344_StartSpringCloudApp.class, args);
  }
}

9.5.2.4、application.yml

server: 
  port: 3344 
  
spring:
  application:
    name:  cloud-config
  cloud:
    config:
      server:
        git:
          uri: https://github.com/yjiu11/cloud-config.git #GitHub上面的git仓库名字

9.5.2.5、测试

http://localhost:3344/application-dev.yml

9.5.3、Config-Client

9.5.3.1、项目图

9.5.3.2、POM

<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>
  <parent>
    <groupId>com.yjiu.cloud</groupId>
    <artifactId>microservicecloud-parent</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>config-client-3355</artifactId>
  <dependencies>
    <!-- SpringCloud Config客户端 -->
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-config</artifactId>
    </dependency>
    <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-eureka</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-config</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-jetty</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>springloaded</artifactId>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-devtools</artifactId>
    </dependency>
  </dependencies>
</project>

9.5.3.3、App主启动类

package com.yjiu.cloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ConfigClient_3355_StartSpringCloudApp{
  public static void main(String[] args){
    SpringApplication.run(ConfigClient_3355_StartSpringCloudApp.class, args);
  }
}

9.5.3.4、application.yml

spring:
  application:
    name: cloud-config-client

9.5.3.5、bootstrap.yml

spring:
  cloud:
    config:
      name: cloud-config-client #需要从github上读取的资源名称，注意没有yml后缀名
      profile: dev   #本次访问的配置项
      label: master   
      uri: http://localhost:3344  #本微服务启动后先去找3344号服务，通过SpringCloudConfig获取GitHub的服务地址

9.5.3.6、bootstrap.yml与GitHUB建立关联

9.5.3.7、Controller测试

package com.yjiu.cloud.rest;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class ConfigClientRest{
  @Value("${spring.application.name}")
  private String applicationName;
 
  @Value("${eureka.client.service-url.defaultZone}")
  private String eurekaServers;
 
  @Value("${server.port}")
  private String port;
 
  @RequestMapping("/config")
  public String getConfig()
  {
    String str = "applicationName: " + applicationName + "\t eurekaServers:" + eurekaServers + "\t port: " + port;
    System.out.println("******str: " + str);
    return "applicationName: " + applicationName + "\t eurekaServers:" + eurekaServers + "\t port: " + port;
  }
}

9.5.3.8、测试

http://localhost:8201/config 此时8202不能访问，因为dev环境端口8201

修改bootstrap.yml

spring:
  cloud:
    config:
      name: cloud-config-client
      profile: test   #由dev改为test******
      label: master   
      uri: http://localhost:3344

http://localhost:8202/config 此时8201不能访问，因为test环境端口8202

来源：https://www.cnblogs.com/yjiu/p/12635740.html