项目结构如下
其中API中主要放置了需要暴露的接口，service则通过RequestMapping的方式提供了一些Controller。在client中，通过feign的方式来调用这些controller。
主POM
<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.5.RELEASE</version>
<relativePath/>
</parent>
<groupId>com.bxoon</groupId>
<artifactId>demo-rpc</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<modules>
<module>demo-rpc-api</module>
<module>demo-rpc-service</module>
<module>demo-rpc-client</module>
</modules>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<spring-cloud.version>Hoxton.SR8</spring-cloud.version>
<spring-cloud-alibaba.version>2.2.3.RELEASE</spring-cloud-alibaba.version>
<fastjson.version>1.2.75</fastjson.version>
</properties>
<dependencies>
<!-- Lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<!-- json -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>${fastjson.version}</version>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<!-- spring-cloud-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!-- spring-cloud-alibaba -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring-cloud-alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
</project>
api 代码
pom
<?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>demo-rpc</artifactId>
<groupId>com.bxoon</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>demo-rpc-api</artifactId>
<packaging>jar</packaging>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
</dependencies>
</project>
一个接口
@FeignClient(value = "demo-rpc-service")
@Component
public interface SayHello {
@GetMapping(value = "/sayHello")
String sayHello();
}
service 代码
<?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>demo-rpc</artifactId>
<groupId>com.bxoon</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>demo-rpc-service</artifactId>
<packaging>jar</packaging>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.bxoon</groupId>
<artifactId>demo-rpc-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
application.yml
server:
port: 12080
eureka:
client:
serviceUrl:
defaultZone: http://${EUREKA_HOST:192.168.7.135}:${EUREKA_PORT:8761}/eureka/
spring:
application:
name: demo-rpc-service
Controller
@RestController
public class SayHelloController {
@GetMapping(value = "/sayHello")
public String sayHello() {
return "hello";
}
}
Client代码
pom
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>demo-rpc</artifactId>
<groupId>com.bxoon</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>demo-rpc-client</artifactId>
<packaging>jar</packaging>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>com.bxoon</groupId>
<artifactId>demo-rpc-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
</dependencies>
</project>
application.yml
server:
port: 11080
eureka:
client:
serviceUrl:
defaultZone: http://${EUREKA_HOST:192.168.7.135}:${EUREKA_PORT:8761}/eureka/
spring:
application:
name: demo-rpc-client
启动类需要加@EnableFeignClients注解
@EnableFeignClients(basePackages = {"com.bxoon"})
@SpringBootApplication
public class ClientApplication {
public static void main(String[] args) {
SpringApplication.run(ClientApplication.class, args);
}
}
Controller
@RestController
@RequiredArgsConstructor
public class SayHelloController {
private final SayHello sayHello;
@RequestMapping("sayHello")
String testSayHello(){
return sayHello.sayHello();
}
}
测试
访问如下地址
localhost:11080/sayHello
页面输出hello说明成功
其他
项目省略了eureka的部署过程，这个过程请自行百度。
