首先创建一个maven项目,为Eureka注册中心项目
依赖引入
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-parent</artifactId>
<version>2.0.3.RELEASE</version>
</parent>
<!-- 管理依赖 -->
<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>
<dependencies>
<!--SpringCloud eureka-server -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<!-- jaxb模块引用 - start -->
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<!-- jaxb模块引用 - end -->
</dependencies>
<!-- 注意: 这里必须要添加, 否者各种依赖有问题 -->
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>repository.springframework.maven.release</id>
<name>Spring Framework Maven Release Repository</name>
<url>http://maven.springframework.org/milestone/</url>
</repository>
<repository>
<id>org.springframework</id>
<url> http://maven.springframework.org/snapshot</url>
</repository>
<repository>
<id>spring-milestone</id>
<name>Spring Maven MILESTONE Repository</name>
<url>http://repo.spring.io/libs-milestone</url>
</repository>
<repository>
<id>spring-release</id>
<name>Spring Maven RELEASE Repository</name>
<url>http://repo.spring.io/libs-release</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>11.0</maven.compiler.source>
<maven.compiler.target>11.0</maven.compiler.target>
</properties>
启动类
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@SpringBootApplication
@EnableEurekaServer
public class Eureka_app {
public static void main(String[] args) {
SpringApplication.run(Eureka_app.class, args);
}
}
application.yml配置文件
#服务端口号
server:
port: 8100
spring:
application:
name: eureka-server
eureka:
instance:
#注册中心ip
hostname: 127.0.0.1
client:
serviceUrl:
#注册地址
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
#是否需要把吧本项目注册到注册中心
register-with-eureka: false
#因为自己是注册中心 所以不需要检索服务
fetch-registry: false
#测试时关闭自我保护机制
server:
enable-self-preservation: false
#剔除失效服务间隔
eviction-interval-timer-in-ms: 2000
创建一个maven project ,packaging选择pom,名为Springcloud-vhukze-parent。
在此项目下新建一个maven model,packaging选择pom,名为Springcloud-vhukze-api-service。
在Springcloud-vhukze-api-service下创建一个maven model,packaging选择jar,名为springcloud-vhukze-api-member-service。
在Springcloud-vhukze-api-service下创建一个maven model,packaging选择jar,名为springcloud-vhukze-api-order-service。
在Springcloud-vhukze-parent下创建一个maven model,packaging选择jar,名为springcloud-vhukze-member-service-impl,是springcloud-vhukze-api-member-service的实现项目。
在Springcloud-vhukze-parent下创建一个maven model,packaging选择jar,名为springcloud-vhukze-order-service-impl,是springcloud-vhukze-api-order-service的实现项目。
在父项目parent中引入依赖
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
</parent>
<!-- 管理依赖 -->
<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>
<dependencies>
<!-- SpringBoot整合Web组件 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- SpringBoot整合eureka客户端 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!-- SpringBoot整合fegnin客户端 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
</dependencies>
<!-- 注意: 这里必须要添加, 否者各种依赖有问题 -->
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/libs-milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
在springcloud-vhukze-api-member-service中创建如下两个类
实体类两个属性,name age 加getset方法重写toString。
IMemberService类
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import com.vhukze.api.entity.UserEntity;
public interface IMemberService {
@RequestMapping("getMember")
public UserEntity getMember(@RequestParam("name") String name);
}
在springcloud-vhukze-member-service-impl引入springcloud-vhukze-api-member-service依赖
<dependencies>
<dependency>
<groupId>com.vhukze</groupId>
<artifactId>springcloud-vhukze-api-member-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
并创建如下两个类
启动类MemberApp
@SpringBootApplication
@ComponentScan(basePackages = "com.vhukze")
@EnableEurekaClient
@EnableFeignClients
public class MemberApp {
public static void main(String[] args) {
SpringApplication.run(MemberApp.class, args);
}
}
接口实现类MemberServiceImpl
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.vhukze.api.entity.UserEntity;
import com.vhukze.api.service.IMemberService;
@RestController
public class MemberServiceImpl implements IMemberService{
@RequestMapping("/getMember")
public UserEntity getMember(String name) {
// TODO Auto-generated method stub
UserEntity user = new UserEntity();
user.setName(name);
user.setAge(19);
return user;
}
}
application.yml配置文件
###服务启动端口号
server:
port: 8000
###服务名称(服务注册到eureka名称)
spring:
application:
name: app-vhuze-member
###服务注册到eureka地址
eureka:
client:
service-url:
defaultZone: http://localhost:8100/eureka
###因为该应用为注册中心,不会注册自己
register-with-eureka: true
###是否需要从eureka上获取注册信息
fetch-registry: true
在springcloud-vhukze-api-order-service创建如下类
import org.springframework.web.bind.annotation.RequestMapping;
public interface IOrderService {
@RequestMapping("toMember")
public String toMember(String name);
}
在springcloud-vhukze-order-service-impl中引入springcloud-vhukze-api-order-service和springcloud-vhukze-api-member-service依赖
<dependencies>
<dependency>
<groupId>com.vhukze</groupId>
<artifactId>springcloud-vhukze-api-order-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.vhukze</groupId>
<artifactId>springcloud-vhukze-api-member-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
并创建如下类
启动类OrderApp
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@ComponentScan(basePackages = "com.vhukze")
@EnableEurekaClient
@EnableFeignClients(basePackages = "com.vhukze.order")
public class OrderApp {
public static void main(String[] args) {
SpringApplication.run(OrderApp.class, args);
}
}
接口实现类OrderServiceImpl
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.vhukze.api.entity.UserEntity;
@RestController
public class OrderServiceImpl implements IOrderService{
@Autowired
private MemberServiceFeign feign;
@RequestMapping("toMember")
public String toMember(String name) {
// TODO Auto-generated method stub
UserEntity user = feign.getMember(name);
return user.toString();
}
}
feign客户端接口
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import com.vhukze.api.service.IMemberService;
@FeignClient("app-vhuze-member")
@Component
public interface MemberServiceFeign extends IMemberService{
}
只需继承IMemberService接口即可。
application.yml配置文件
###服务启动端口号
server:
port: 8020
###服务名称(服务注册到eureka名称)
spring:
application:
name: app-vhuze-order
###服务注册到eureka地址
eureka:
client:
service-url:
defaultZone: http://localhost:8100/eureka
###因为该应用为注册中心,不会注册自己
register-with-eureka: true
###是否需要从eureka上获取注册信息
fetch-registry: true
启动Eureka注册中心
启动OrderApp和MemberApp