记录dubbo2.7.8+zookeeper3.6.2+springboot2.3.5整合

首先，使用maven建立父工程dubbozookeeper，pom.xml配置如下：

<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">
    <groupId>org.examplegroupId>
    <artifactId>dubbozookeeperartifactId>
    <version>1.0-SNAPSHOTversion>
    <modelVersion>4.0.0modelVersion>
    <packaging>pompackaging>
    <modules>
        <module>consumer-clientmodule>
        <module>provider-servermodule>
    modules>
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.3.5.RELEASEversion>
    parent>
    <dependencies>
        <dependency>
            <groupId>org.junit.jupitergroupId>
            <artifactId>junit-jupiterartifactId>
            <scope>testscope>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-configuration-processorartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
        dependency>
    dependencies>
project>

在父工程下建立module工程provider-server，pom.xml配置如下：

<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>
        <groupId>org.examplegroupId>
        <artifactId>dubbozookeeperartifactId>
        <version>1.0-SNAPSHOTversion>
    parent>
    <modelVersion>4.0.0modelVersion>
    <artifactId>provider-serverartifactId>
    <dependencies>
        <dependency>
            <groupId>com.github.sgroschupfgroupId>
            <artifactId>zkclientartifactId>
            <version>0.1version>
        dependency>
        <dependency>
            <groupId>org.apache.curatorgroupId>
            <artifactId>curator-frameworkartifactId>
            <version>5.1.0version>
        dependency>
        <dependency>
            <groupId>org.apache.curatorgroupId>
            <artifactId>curator-recipesartifactId>
            <version>5.1.0version>
        dependency>
        <dependency>
            <groupId>org.apache.dubbogroupId>
            <artifactId>dubbo-spring-boot-starterartifactId>
            <version>2.7.8version>
        dependency>
        <dependency>
            <groupId>org.apache.zookeepergroupId>
            <artifactId>zookeeperartifactId>
            <version>3.6.2version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4jgroupId>
                    <artifactId>slf4j-log4j12artifactId>
                exclusion>
            exclusions>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
    dependencies>
project>

新建org.example.ProviderServerApplication类

package org.example;

import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@EnableDubbo(scanBasePackages = "org.example.service")
@SpringBootApplication
public class ProviderServerApplication {
     
    public static void main(String[] args) {
     
        SpringApplication.run(ProviderServerApplication.class, args);
    }
}

新建org.example.service.TicketService类

package org.example.service;

public interface TicketService {
     
    String getTicket();
}

新建org.example.service.TicketServiceImpl类

package org.example.service;

import org.apache.dubbo.config.annotation.DubboService;

/**
 * zookeeper：服务注册与发现
 */
@DubboService//可以被扫描到，在项目启动时就自动注册到注册中心
public class TicketServiceImpl implements TicketService {
     
    @Override
    public String getTicket() {
     
        return "一张票";
    }
}

新建application.yml文件

server:
  port: 8002
#服务应用名字
dubbo:
  application:
    name: provider-server
#注册中心地址
  registry:
    address: zookeeper://127.0.0.1:2181
#被注册的服务
  scan:
    base-packages:
      - org.example.service

接着在父工程下建立module工程consumer-client，pom.xml配置如下：

<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>
        <groupId>org.examplegroupId>
        <artifactId>dubbozookeeperartifactId>
        <version>1.0-SNAPSHOTversion>
    parent>
    <modelVersion>4.0.0modelVersion>
    <artifactId>consumer-clientartifactId>
    <dependencies>
        <dependency>
            <groupId>com.github.sgroschupfgroupId>
            <artifactId>zkclientartifactId>
            <version>0.1version>
        dependency>
        <dependency>
            <groupId>org.apache.curatorgroupId>
            <artifactId>curator-frameworkartifactId>
            <version>5.1.0version>
        dependency>
        <dependency>
            <groupId>org.apache.curatorgroupId>
            <artifactId>curator-recipesartifactId>
            <version>5.1.0version>
        dependency>
        <dependency>
            <groupId>org.apache.dubbogroupId>
            <artifactId>dubbo-spring-boot-starterartifactId>
            <version>2.7.8version>
        dependency>
        <dependency>
            <groupId>org.apache.zookeepergroupId>
            <artifactId>zookeeperartifactId>
            <version>3.6.2version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4jgroupId>
                    <artifactId>slf4j-log4j12artifactId>
                exclusion>
            exclusions>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
    dependencies>
project>

新建org.example.ConsumerClientApplication类

package org.example;

import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@EnableDubbo(scanBasePackages = "org.example.service")
@SpringBootApplication
public class ConsumerClientApplication {
     
    public static void main(String[] args) {
     
        SpringApplication.run(ConsumerClientApplication.class, args);
    }
}

新建org.example.service.TicketService类

package org.example.service;

public interface TicketService {
     
    String getTicket();
}

新建org.example.service.UserService类

package org.example.service;

import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.stereotype.Service;

@Service//放到容器中
public class UserService {
     
    /**
     * 想拿到provider-server提供的服务，要去注册中心拿到服务
     */
    @DubboReference//引用，pom坐标，可以定义路径相同的接口名
    TicketService ticketService;

    public void buyTicket() {
     
        String ticket = ticketService.getTicket();
        System.out.println("在注册中心获得：" + ticket);
    }
}

新建application.yml文件

server:
  port: 8001
#消费者取服务需要暴露自己名字
dubbo:
  application:
    name: consumer-client
#注册中心地址
  registry:
    address: zookeeper://127.0.0.1:2181

最后是测试类：test/java/org.example.ConsumerServerApplicationTest

package org.example;

import org.example.service.UserService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class ConsumerServerApplicationTest {
     
    @Autowired
    UserService userService;

    @Test
    void contextLoads() {
     
        userService.buyTicket();
    }
}

执行过程：
①官网下载apache-zookeeper-3.6.2-bin.tar并解压进入apache-zookeeper-3.6.2-bin目录
②进入conf目录，复制zoo_sample.cfg到相同目录下并更名为zoo.cfg
③启动bin目录下的zkServer.cmd
④启动ProviderServerApplication的main方法
⑤启动ConsumerClientApplication的main方法
⑥启动ConsumerServerApplicationTest的contextLoads方法，控制台输出结果