1. 改造Dubbo项目

1.1 搭建provider模块

1. 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>Dubbo3-Demo</artifactId>
           <groupId>com.doli</groupId>
           <version>1.0-SNAPSHOT</version>
       </parent>
       <modelVersion>4.0.0</modelVersion>
   
       <artifactId>provider</artifactId>
   
       <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>
               <version>2.3.7.RELEASE</version>
           </dependency>
           <dependency>
               <groupId>org.apache.dubbo</groupId>
               <artifactId>dubbo-spring-boot-starter</artifactId>
               <version>3.0.7</version>
           </dependency>
           <dependency>
               <groupId>org.apache.dubbo</groupId>
               <artifactId>dubbo-registry-zookeeper</artifactId>
               <version>3.0.7</version>
           </dependency>
           <dependency>
               <groupId>org.apache.dubbo</groupId>
               <artifactId>dubbo-rpc-dubbo</artifactId>
               <version>3.0.7</version>
           </dependency>
           <dependency>
               <groupId>com.doli</groupId>
               <artifactId>common</artifactId>
               <version>1.0-SNAPSHOT</version>
           </dependency>
       </dependencies>
   
   </project>
   

2. UserController

   @RestController
   public class UserController {
   
       @Autowired
       private UserServiceImpl userService;
   
       @GetMapping("/user")
       public String getUser(){
           return userService.getUser();
       }
   
   }
   

3. UserServiceImpl

   @DubboService
   public class UserServiceImpl implements UserService {
       public String getUser() {
           return "dubbo is learning!!!!";
       }
   }
   

4. ProviderApplication

   @SpringBootApplication
   @EnableDubbo
   public class ProviderApplication {
       public static void main(String[] args) {
           SpringApplication.run(ProviderApplication.class);
       }
   }
   

5. application.properties

   dubbo.application.name=provider-application
   
   dubbo.protocol.name=dubbo
   dubbo.protocol.port=20880
   
   dubbo.registry.address=zookeeper://192.168.189.128:2181
   

1.2 搭建consumer模块

1. 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>Dubbo3-Demo</artifactId>
           <groupId>com.doli</groupId>
           <version>1.0-SNAPSHOT</version>
       </parent>
       <modelVersion>4.0.0</modelVersion>
   
       <artifactId>consumer</artifactId>
   
       <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>
               <version>2.3.7.RELEASE</version>
           </dependency>
   
           <dependency>
               <groupId>org.apache.dubbo</groupId>
               <artifactId>dubbo-spring-boot-starter</artifactId>
               <version>3.0.7</version>
           </dependency>
           <dependency>
               <groupId>org.apache.dubbo</groupId>
               <artifactId>dubbo-registry-zookeeper</artifactId>
               <version>3.0.7</version>
           </dependency>
           <dependency>
               <groupId>org.apache.dubbo</groupId>
               <artifactId>dubbo-rpc-dubbo</artifactId>
               <version>3.0.7</version>
           </dependency>
           <dependency>
               <groupId>com.doli</groupId>
               <artifactId>common</artifactId>
               <version>1.0-SNAPSHOT</version>
           </dependency>
       </dependencies>
   
   </project>
   

2. OrderController

   @RestController
   public class OrderController {
   
       @Autowired
       private OrderService orderService;
   
       @GetMapping("/order")
       public String getUser(){
           return orderService.getOrder();
       }
   }
   

3. OrderService

   @Service
   public class OrderService {
       @DubboReference
       private UserService userService;
   
       public String getOrder(){
           String user = userService.getUser();
           return user;
       }
   }
   

4. ConsumerApplication

   @SpringBootApplication
   @EnableDubbo
   public class ConsumerApplication {
   
       @Bean
       public RestTemplate restTemplate(){
           return new RestTemplate();
       }
       public static void main(String[] args) {
           SpringApplication.run(ConsumerApplication.class);
       }
   }
   

5. application.properties

   server.port=8081
   dubbo.application.name=consumer-application
   dubbo.registry.address=zookeeper://192.168.189.128:2181
   

1.3 搭建common模块

1. UserService

   public interface UserService {
   	publicString getUser();
   }