文章目录
- 前言
- 创建父工程Maven: cloud2020
- 创建服务提供者module: cloud-provider-payment8001
- 创建消费者module:cloud-consumer-order80
- 创建公共API module:cloud-api-commons
- 创建Eureka服务端module:cloud-eureka-server7001
- 服务提供者module:8001注册到EurekaServer
- 服务消费者module:80注册到EurekaServer
- 创建module:cloud-eureka-server7002
- 两个微服务发布到Eureka集群配置中
- 创建服务提供者module: cloud-provider-payment8002
前言
这篇博客主要记录了尚硅谷周阳老师2020最新版Spring Cloud的项目初级部分的项目构建详细过程。
- 在实践之前,建议先看一下 微服务入门,有这一篇就够了这篇博客,通俗易懂并且详细介绍了微服务的一些思想和理念。我相信有了这些基础知识,你在进行实践,你会事半功倍。
- 项目代码、数据库表、相关软件安装包已经上传到github:https://github.com/Carroll-guogaoqin/Cloud2020
- 如果您在自己编写项目的过程中遇到任何问题和bug,都可以给我留言,我将尽力为您解答.
- 开发所用技术架构
软件 | 版本 |
Spring Boot | 2.2.2.RELEASE |
Spring Cloud | Hoxton.SR1 |
Spring Cloud Alibaba | 2.1.0.RELEASE |
Java | java8 |
Maven | 3.5+ |
MySQL | 5.7+ |
创建父工程Maven: cloud2020
- 创建完成后,删掉site目录。
- 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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud2020</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<name>Maven</name>
<!-- FIXME change it to the project's website -->
<url>http://maven.apache.org/</url>
<inceptionYear>2001</inceptionYear>
<distributionManagement>
<site>
<id>website</id>
<url>scp://webhost.company.com/www/website</url>
</site>
</distributionManagement>
<!--统一管理jar包版本-->
<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>
<mysql.version>5.1.47</mysql.version>
<druid.version>1.1.16</druid.version>
<mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
</properties>
<!--子模块继承之后,提供作用:锁定版本+子module不用groupId和version-->
<dependencyManagement>
<dependencies>
<!--spring boot 2.2.2-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>2.2.2.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!--spring cloud Hoxton.SR1-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Hoxton.SR1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!--spring cloud alibaba 2.1.0.RELEASE-->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>2.1.0.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis.spring.boot.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
</build>
</project>
- 之后的微服务module模块都在cloud2020模块下面创建
- 微服务module模块:
- 总结: 1. 建module 2. 改pom 3. 写yml 4. 主启动 5. 业务类
创建服务提供者module: cloud-provider-payment8001
- 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>cloud2020</artifactId>
<groupId>com.atguigu.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-provider-payment8001</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>
<!--eureka-client-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</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-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<!--mysql-connector-java-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</project>
- application.yml
server:
port: 8001
spring:
application:
name: cloud-provider-service
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/cloud2020?useUnicode=true&characterEncoding-utr-8&useSSL=false
username: root
password: 123456
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.atguigui.springcloud.entities #所有Entity别名类所在包
- 主启动类 PaymentMain8001
package com.atguigu.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class PaymentMain8001 {
public static void main(String[] args) {
SpringApplication.run(PaymentMain8001.class,args);
}
}
- 主实体类: Payment
package com.atguigu.springcloud.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment {
private Long id;
private String serial;
}
package com.atguigu.springcloud.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
//泛型:如果装的payment 返回payment,装的order 返回order
public class CommonResult<T> {
private Integer code;
private String message;
private T data;
public CommonResult(Integer code,String message){
this(code,message,null);
}
}
- 持久层(dao层)
package com.atguigu.springcloud.dao;
import com.atguigu.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
@Mapper
public interface PaymentDao {
int create(Payment payment);
Payment getPaymentById(@Param("id") Long id);
}
- PaymentMapper.xml
- resources目录下新建mapper文件夹
- 然后创建PaymentMapper.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.atguigu.springcloud.dao.PaymentDao">
<insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
insert into payment(serial) values(#{serial})
</insert>
<resultMap id="BaseResultMap" type="com.atguigu.springcloud.entities.Payment">
<id column="id" property="id" jdbcType="BIGINT"/>
<result column="serial" property="serial" jdbcType="VARCHAR"/>
</resultMap>
<select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap">
select * from payment where id=#{id};
</select>
</mapper>
- 业务层(service)
package com.atguigu.springcloud.service;
import com.atguigu.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Param;
public interface PaymentService {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
package com.atguigu.springcloud.service;
import com.atguigu.springcloud.dao.PaymentDao;
import com.atguigu.springcloud.entities.Payment;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Service
public class PaymentServiceImpl implements PaymentService{
@Resource
private PaymentDao paymentDao;
public int create(Payment payment){
return paymentDao.create(payment);
}
public Payment getPaymentById(Long id){
return paymentDao.getPaymentById(id);
}
}
- 控制层(Controller)
package com.atguigu.springcloud.controller;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
@RestController
@Slf4j
public class PaymentController {
@Resource
private PaymentService paymentService;
//只传给前端CommonResult,不需要前端了解其他的组件
@PostMapping(value = "/payment/create")
public CommonResult create(@RequestBody Payment payment){
int result = paymentService.create(payment);
log.info("*****插入结果:"+result);
if(result > 0){
return new CommonResult(200,"插入数据成功",result);
}else{
return new CommonResult(444,"插入数据失败",null);
}
}
@GetMapping(value = "/payment/get/{id}")
public CommonResult getPaymentById(@PathVariable("id") Long id){
Payment payment = paymentService.getPaymentById(id);
log.info("*****插入结果:"+payment);
if(payment != null){
return new CommonResult(200,"查询成功",payment);
}else{
return new CommonResult(444,"没有对应记录,查询ID:"+id,null);
}
}
}
创建消费者module:cloud-consumer-order80
- 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>cloud2020</artifactId>
<groupId>com.atguigu.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-consumer-order80</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</project>
- application.yml
server:
port: 80
- 主启动类:OrderMain80
package com.atguigu.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class OrderMain80 {
public static void main(String[] args) {
SpringApplication.run(OrderMain80.class,args);
}
}
- 业务类
package com.atguigu.springcloud.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment {
private Long id;
private String serial;
}
package com.atguigu.springcloud.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult<T> { //泛型:如果装的payment 返回payment,装的order 返回order
private Integer code;
private String message;
private T data;
public CommonResult(Integer code,String message){
this(code,message,null);
}
}
- RestTemplate对象注册到容器中
package com.atguigu.springcloud.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class ApplicationContextConfig {
@Bean
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
package com.atguigu.springcloud.controller;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import javax.annotation.Resource;
@RestController
@Slf4j
public class OrderController {
private static final String PAYMENT_URL="http://localhost:8001";
@Resource
private RestTemplate restTemplate;
@GetMapping("/consumer/payment/create")
public CommonResult<Payment> create(Payment payment){
return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
}
@GetMapping("/consumer/payment/get/{id}")
public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
}
}
- 启动项目测试成功。
项目中存在相同的代码(entities包下的Payment.class和CommonResult.class),造成代码冗余,我们可以对它进行重构。
通过Maven聚合父工程,把相同重复的代码移到公开公用的工程里面,还可以放第三方接口、工具类,统一调配使用。
创建公共API module:cloud-api-commons
- 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>cloud2020</artifactId>
<groupId>com.atguigu.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-api-commons</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.1.0</version>
</dependency>
</dependencies>
</project>
- 重复的entities包复制到module:cloud-api-commons
package com.atguigu.springcloud.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment {
private Long id;
private String serial;
}
package com.atguigu.springcloud.entities;
//Json封装体CommentResult,传给前端,判断编码是否成功,成功才显示
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult<T> { //泛型:如果装的payment 返回payment,装的order 返回order
private Integer code;
private String message;
private T data;
public CommonResult(Integer code,String message){
this(code,message,null);
}
}
- 使用Maven打包(install)发布上传到公用本地库
- 删除提供者和消费者的entities
- 然后在提供者和消费者的pom.xml中,引入maven install的jar包坐标即可使用
<!--引入自己定义的api通用包,可以使用Payment支付Entity-->
<dependency>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</dependency>
创建Eureka服务端module:cloud-eureka-server7001
- Eureka有两个组件,一定要标清楚哪个是Server,哪个是Client。
- @EnableEurekaServer代表服务注册中心
- 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>cloud2020</artifactId>
<groupId>com.atguigu.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-eureka-server7001</artifactId>
<dependencies>
<!--eureka server-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<!--引入自己定义的api通用包,可以使用payment支付Entity-->
<dependency>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</dependency>
<!--boot web actuator-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!--一般通用配置-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
</dependencies>
</project>
- application.yml
server:
port: 7001
eureka:
instance:
hostname: localhost #eureka服务端的实例名称
client:
#false表示不向注册中心注册自己
register-with-eureka: false
#false表示自己端就是注册中心,我的职责就是维护服务实例,并不需要去检索服务
fetch-registry: false
service-url:
#设置与Eureka Server交互的地址查询服务和注册服务都需要依赖这个地址
defaultZ4 one: http://${eureka.instance.hostname}:${server.port}/eureka/
- 主启动类
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 //@EnableEurekaServer代表服务注册中心
public class EurekaMain7001 {
public static void main(String[] args) {
SpringApplication.run(EurekaMain7001.class,args);
}
}
服务提供者module:8001注册到EurekaServer
- module: cloud-provider-payment8001的pom.xml引入
<!--eureka-client-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
- application.yml添加Eureka相关配置
eureka:
client:
#表示是否将自己注册进EurekaServer默认为true
register-with-eureka: true
#是否从EurekaServer抓取已有的注册信息,默认为true。单节点无所谓,集群必须设置为true才能配合ribbon使用负载均衡
fetch-registry: true
service-url:
defaultZone: http://localhost:7001/eureka
- 主启动类添加注解
@EnableEurekaClient
- 测试:要先启动EurekaServer,然后在启动服务提供者8001
服务消费者module:80注册到EurekaServer
- module:cloud-consumer-order80的pom.xml引入
<!--eureka-client-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
- application.yml添加相关配置
spring:
application:
name: cloud-order-server
eureka:
client:
#表示是否将自己注册进EurekaServer默认为true
register-with-eureka: true
fetch-registry: true
service-url:
defaultZone: http://localhost:7001/eureka
- 主启动类添加注解@EnableEurekaClient
- 测试:要先启动EurekaServer,然后在启动服务消费者80
EurekaServer集群环境构建
创建module:cloud-eureka-server7002
- 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>cloud2020</artifactId>
<groupId>com.atguigu.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-eureka-server7002</artifactId>
<dependencies>
<!--eureka-server-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<!--引入自定义的api通用包,可以使用Payment支付Entity-->
<dependency>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</dependency>
<!--boot web actuator-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!--一般通用配置-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
</dependencies>
</project>
- 修改7001和7002的application.yml
server:
port: 7001
eureka:
instance:
hostname: eureka7001.com #eureka服务端的实例名称
client:
#false表示不向注册中心注册自己
register-with-eureka: 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
fetch-registry: false
service-url:
#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
defaultZone: http://eureka7002.com:7002/eureka/
server:
port: 7002
eureka:
instance:
hostname: eureka7002.com #eureka服务端的实例名称
client:
#false表示不向注册中心注册自己
register-with-eureka: 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
fetch-registry: false
service-url:
#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
defaultZone: http://eureka7001.com:7001/eureka/
- 修改本机端口映射
- 进入
C:\Windows\System32\drivers\etc
- 在HOSTS文件底添加端口映射
127.0.0.1 eureka7001.com
127.0.0.1 eureka7002.com
- 主启动类
package com.atguigu.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient
public class EurekaMain7002 {
public static void main(String[] args) {
SpringApplication.run(EurekaMain7002.class,args);
}
}
两个微服务发布到Eureka集群配置中
- 分别修改8001、80的application.yml
- 单机版
#defaultZone: http://localhost:7001/eureka
- 集群版
defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版
- 测试:先启动EurekaServer,7001/7002服务;再启动服务提供者provider8001;再启动消费者consumer80.
提供者8001集群环境搭建
创建服务提供者module: cloud-provider-payment8002
- pom.xml 同8001的 pom.xml 一样
- application.yml同8001的也一样,只需要将端口改为8002即可
- 主启动类和业务类直接从8001拷贝
- 修改8001和8002的controller,默认的负载均衡方式是轮询,看执行查询具体调用那台provider
@RestController
@Slf4j
public class PaymentController {
@Resource
private PaymentService paymentService;
@Value("${server.port}")
private String serverPort;
//只传给前端CommonResult,不需要前端了解其他的组件
@PostMapping(value = "/payment/create")
public CommonResult create(@RequestBody Payment payment){
int result = paymentService.create(payment);
log.info("*****插入结果:"+result);
if(result > 0){
return new CommonResult(200,"插入数据成功,serverPort:"+serverPort,result);
}else{
return new CommonResult(444,"插入数据失败",null);
}
}
@GetMapping(value = "/payment/get/{id}")
public CommonResult getPaymentById(@PathVariable("id") Long id){
Payment payment = paymentService.getPaymentById(id);
log.info("*****插入结果:"+payment);
if(payment != null){
return new CommonResult(200,"查询成功,serverPort:"+serverPort,payment);
}else{
return new CommonResult(444,"没有对应记录,查询ID:"+id,null);
}
}
}
- 测试:启动顺序:7001、7002、8001、8002、80
- 出现的问题:通过80访问,一直都是8001端口。
- 单机版写死是没有问题的,但是现在有8001、8002了,所有不应该再关注具体的IP和端口,而是只认服务名称。代码修改为如下
@RestController
@Slf4j
public class OrderController {
//private static final String PAYMENT_URL="http://localhost:8001"; //单机版
private static final String PAYMENT_URL="http://CLOUD-PROVIDER-SERVICE"; //集群版,(负载均衡)
@Resource
private RestTemplate restTemplate;
@GetMapping("/consumer/payment/create")
public CommonResult<Payment> create(Payment payment){
return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
}
@GetMapping("/consumer/payment/get/{id}")
public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
}
@GetMapping("/consumer/payment/zipkin")
public String PaymentZipkin(){
String result = restTemplate.getForObject("http://localhost:8001/payment/zipkin/",String.class);
return result;
}
}
- 在服务消费者的ApplicationContextConfig 类的getRestTemplate方法添加
@LoadBalanced
注解,开启负载均衡 - 再次测试:重新启动:7001、7002、8001、8002、80,测试成功。
- 如果你有遇到任何报错或者问题,都可以给我留言,我将尽力给你解答。
你知道的越多,你不知道的越多。
有道无术,术尚可求,有术无道,止于术。
如有其它问题,欢迎大家留言,我们一起讨论,一起学习,一起进步