前言:
开发工具:IntelliJ IDEA 2020.1
用到的框架:spring boot 、spring cloud
搭建一套spring cloud, spring boot 多个服务互相调用
需要搭建一个父工程springcloud,一个服务注册中心server,两个微服务cloud-tigong,cloud-xiaofei。
两个微服务均注册到服务注册中心
dubbo 与cloud的区别
dubbo由于是二进制的传输,占用带宽会更少
springCloud是http协议传输,带宽会比较多,同时使用http协议一般会使用JSON报文,消耗会更大
dubbo的开发难度较大,原因是dubbo的jar包依赖问题很多大型工程无法解决
springcloud的接口协议约定比较自由且松散,需要有强有力的行政措施来限制接口无序升级
dubbo的注册中心可以选择zk,redis等多种,springcloud的注册中心只能用eureka或者自研
一.搭建父项目
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定义pom.xml文件
<?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>
<!-- 我这里已经集成了 子项目 -->
<modules>
<module>server</module>
<module>cloud-xiaofei</module>
<module>cloud-tigong</module>
</modules>
<groupId>com.haiteng</groupId>
<artifactId>springcloud</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.1</version>
<relativePath/>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
</project>
二.搭建server注册中心
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定义pom.xml文件
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.haiteng</groupId>
<artifactId>springcloud</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.haiteng</groupId>
<artifactId>server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>server</name>
<description>Demo project for Spring Boot</description>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
启动加注解@EnableEurekaServer(开启eureka服务)
package com.haiteng.server;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@SpringBootApplication
@EnableEurekaServer
public class ServerApplication {
public static void main(String[] args) {
SpringApplication.run(ServerApplication.class, args);
}
}
定义配置文件
配置文件改为application.yml
server:
port: 80
spring:
application:
#应用名称(在注册中显示的)
name: server
eureka:
client:
#此客户端是否获取eureka服务器注册表上的注册信息,默认为true
fetch-registry: false
#实例是否在eureka服务器上注册自己的信息以供其他服务发现,默认为true,即自己注册自己。
register-with-eureka: true
#与Eureka注册服务中心的通信zone和url地址
serviceUrl:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka
#服务注册中心实例的主机名
instance:
hostname: 127.0.0.1
prefer-ip-address: true
instance-id: 127.0.0.1:80
server:
enable-self-preservation: false
eviction-interval-timer-in-ms: 10000
(5)测试
三.搭建提供者服务
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定义pom.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.haiteng</groupId>
<artifactId>springcloud</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.haiteng.tigong</groupId>
<artifactId>cloud-tigong</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>cloud-tigong</name>
<description>Demo project for Spring Boot</description>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
修改配置文件为application.yml
spring:
application:
name: cloud-tigong
server:
port: 81
eureka:
client:
fetch-registry: false
register-with-eureka: true
service-url:
defaultZone: http://localhost:80/eureka
#服务注册中心实例的主机名
instance:
hostname: 127.0.0.1
prefer-ip-address: true
instance-id: 127.0.0.1:81
启动类加注解@EnableEurekaClient
package com.haiteng.tigong;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient
public class CloudTigongApplication {
public static void main(String[] args) {
SpringApplication.run(CloudTigongApplication.class, args);
}
}
测试
四.搭建消费者服务
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定义pom.xml文件
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.haiteng</groupId>
<artifactId>springcloud</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.haiteng</groupId>
<artifactId>cloud-xiaofei</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>cloud-xiaofei</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
修改配置文件为application.yml(可有可无)
server:
#定义端口号
port: 82
spring:
application:
#定义应用名称,即服务名称
name: cloud-xiaofei
eureka:
client:
service-url:
defaultZone: http://localhost:80/eureka
#服务注册中心实例的主机名
instance:
hostname: 127.0.0.1
prefer-ip-address: true
instance-id: 127.0.0.1:82
启动类加注解@EnableEurekaClient
package com.haiteng;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
public class CloudXiaofeiApplication {
public static void main(String[] args) {
SpringApplication.run(CloudXiaofeiApplication.class, args);
}
}
测试
在父pom中加上
<modules>
<module>server</module>
<module>cloud-xiaofei</module>
<module>cloud-tigong</module>
</modules>
五.实现服务之间的调用
1.在cloud-tigong中创建controller包和service包
package com.haiteng.tigong.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/test")
public class TestController {
@GetMapping("/index")
public String getHello(){
return "测试成功";
}
}
(2)测试
(3)在cloud-xiaofei中创建controller包和service包
package com.haiteng.controller;
import com.haiteng.service.TestService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/test")
public class TestClient {
@Autowired
private TestService testService;
@GetMapping("/getClient")
public String getClient(){
return testService.getProduct();
}
}
package com.haiteng.service;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestMapping;
@FeignClient(name = "cloud-tigong",path ="/test" )
@Component
public interface TestService {
@RequestMapping(value = "index")
String getProduct();
}
特别注意
在启动类加上注解@EnableFeignClients
package com.haiteng;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
public class CloudXiaofeiApplication {
public static void main(String[] args) {
SpringApplication.run(CloudXiaofeiApplication.class, args);
}
}
(4)测试
到这里就全部完事了.
如果创建失败,可以和我要做好的包 QQ:75238016