dubbo(七)——SpringBoot集成Dubbo和Zookeeper_dubbo3整合springboot 不使用zookeeper

一、项目结构

001-interface：表示接口工程
boot-provider: 表示服务提供者
boot-consumer: 表示服务消费者

二、接口工程

明确接口工程为java工程，需要将该工程打成jar包，供提供者和消费者使用

打包步骤

1. HelloService

public interface HelloService {

    public String sayHello();
}
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2. 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">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.cjw.dubbo</groupId>
  <artifactId>001-interface</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>jar</packaging>
</project>
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三、服务提供者

1. HelloServiceImpl ：接口实现类

import com.cjw.dubbo.service.HelloService;
import org.apache.dubbo.config.annotation.Service;
import org.springframework.stereotype.Component;

@Service  //将服务暴露出去
@Component //将服务注册在容器中
public class HelloServiceImpl implements HelloService {
    @Override
    public String sayHello() {
        return "boot-provider-sayHello";
    }
}

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2. BootProviderApplication

@EnableDubbo //开启dubbo注解
@SpringBootApplication
public class BootProviderApplication {

    public static void main(String[] args) {
        SpringApplication.run(BootProviderApplication.class, args);
    }

}
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3. application.properties

#端口号
server.port=8082
#注册提供者
dubbo.application.name=boot-provider
#注册服务到zookeeper中
dubbo.registry.address=zookeeper://localhost:2181
#协议端口号为20880
dubbo.protocol.port=20880
#使用协议为dubbo
dubbo.protocol.name=dubbo

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4. pom.xml

  <!--dubbo-->
        <!-- Dubbo Spring Boot Starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.3</version>
        </dependency>
        <!--zookeeper-->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>apache-curator</artifactId>
            <version>2.12.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.12.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.14</version>
            <!--排除这个slf4j-log4j12-->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
         <!--引入接口工程-->
        <dependency>
            <groupId>com.cjw.dubbo</groupId>
            <artifactId>001-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
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四、服务消费者

1.HelloDubboController

import com.cjw.dubbo.service.HelloService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class HelloDubboController {

    @Reference  //远程引用指定的服务，他会按照全类名进行匹配，看谁给注册中心注册了这个全类名
    private HelloService helloService;

    @RequestMapping("/hello")
    @ResponseBody
    public String getHello() {
        String sayHello = helloService.sayHello();
        System.out.println("sayHello = " + sayHello);
        return sayHello;
    }
}
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2. BootConsumerApplication

@EnableDubbo  //开启dubbo注解
@SpringBootApplication
public class BootConsumerApplication {

    public static void main(String[] args) {
        SpringApplication.run(BootConsumerApplication.class, args);
    }

}

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3. application.properties

#端口号
server.port=8083
#注册服务消费者
dubbo.application.name=boot-consumer
#使用zookeeper 接收服务
dubbo.registry.address=zookeeper://localhost:2181

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4. pom.xml

<!--dubbo-->
        <!-- Dubbo Spring Boot Starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.3</version>
        </dependency>
        <!--zookeeper-->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>apache-curator</artifactId>
            <version>2.12.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.12.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.14</version>
            <!--排除这个slf4j-log4j12-->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--接口工程-->
        <dependency>
            <groupId>com.cjw.dubbo</groupId>
            <artifactId>001-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
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五、总结

1. 注意. @Reference 表示远程引用指定的服务，他会按照全类名进行匹配，看谁给注册中心注册了这个全类名
2. @Service //将服务暴露出去 包名为org.apache.dubbo.config.annotation.Service
3. @EnableDubbo //开启dubbo注解