SpringCloud-基於SpringBoot 2.1.3.RELEASE版本從零搭建分佈式框架之服務提供者（三）
構建model實體模塊
這個模塊存儲數據庫實體對象，提供別的模塊依賴，線上項目通常是這樣的做法。構建model模塊 操作不在具體介紹。
模塊圖如下：
新建實體UserVo:
package com.spring.cloud.model;
import lombok.Data;
/**
* @ClassName UserVo
* @Description TODO
* @Author cuixhao
* @Date 2019/3/7
* @Version 1.0
**/
@Data
public class UserVo {
private String userId;
private String userName;
}
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">
<parent>
<artifactId>spring-cloud</artifactId>
<groupId>com.spring.cloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>model</artifactId>
<packaging>jar</packaging>
</project>
單個服務配置
新建模塊 eureka-provider,服務提供者.利用Ribbon實現。
pom.xml
<parent>
<artifactId>spring-cloud</artifactId>
<groupId>com.spring.cloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>eureka-provider</artifactId>
<version>1.0-SNAPSHOT</version>
<name>eureka-provider</name>
<description>服務端</description>
<packaging>jar</packaging>
<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>Greenwich.RELEASE</spring-cloud.version>
</properties>
<dependencies>
<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-netflix-ribbon</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.spring.cloud</groupId>
<artifactId>model</artifactId>
<version>1.0-SNAPSHOT</version>
</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>
修改啓動類如下
package com.spring.cloud.eureka;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
/**
* @ClassName EurekaProviderApplication
* @Description TODO
* @Author cuixhao
* @Date 2019/3/7
* @Version 1.0
**/
@SpringBootApplication
@EnableEurekaClient
public class EurekaProviderApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaProviderApplication.class, args);
}
@Bean
@LoadBalanced
RestTemplate restTemplate() {
return new RestTemplate();
}
}
注：@EnableEurekaClient 和 @EnableDiscoveryClient的區別：
- 這兩個都是服務發現的註解，區別是：前者是隻針對註冊中心是Eureka使用的註解，後者是兼容所有的註冊中心，例如：Zookeeper等。
編寫一個服務Rest接口
package com.spring.cloud.eureka.controller;
import com.spring.cloud.model.UserVo;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
/**
* @ClassName ClientController
* @Description TODO
* @Author cuixhao
* @Date 2019/3/7
* @Version 1.0
**/
@RestController
@Slf4j
public class ClientController {
@GetMapping("add")
public UserVo service(@RequestParam String userId) {
UserVo userVo = new UserVo();
userVo.setUserId(userId);
userVo.setUserName("傑克");
log.info("執行了");
return userVo;
}
}
通過輸入一個userId參數，返回一個UserVo對象。
編寫application.properties文件：
# 服務名字
spring.application.name=PRODUCER-SERVICE
# 端口
server.port=7001
# 註冊中心地址，如果是集羣，那就逗號分隔
eureka.client.serviceUrl.defaultZone= \
http://localhost:8001/eureka/
啓動項目
先啓動Eureka-Server,在啓動Eureka-Provider,訪問註冊中心：http://localhost:8001
出現如圖所示，表示服務已經註冊成功。
服務集羣配置
服務集羣配置和上一篇註冊中心集羣步驟一致。
編寫兩個服務：
application.properties
# 服務名稱
spring.application.name=PRODUCER-SERVICE
# 註冊中心地址
eureka.client.serviceUrl.defaultZone= \
http://localhost:8001/eureka/
application-service1.properties
server.port=7001
application-service2.properties
server.port=7002
啓動命令：
java -jar eureka-provider.jar --spring.profiles.active=service1
java -jar eureka-provider.jar --spring.profiles.active=service2
訪問註冊中心：http://localhost:8001,就可以看到7001 7002 兩個端口的服務註冊成功了！