springBoot+dubbo+zookeeper如何实现分布式开发应用

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环境搭建

项目结构图：

1.我们首先做好服务端

pom.xml

   <dependencies>        <!--导入依赖：Dubbo + zookeeper-->        <dependency>            <groupId>org.apache.dubbo</groupId>            <artifactId>dubbo-spring-boot-starter</artifactId>            <version>2.7.3</version>        </dependency>        <!--引入zkclient-->        <dependency>            <groupId>com.github.sgroschupf</groupId>            <artifactId>zkclient</artifactId>            <version>0.1</version>        </dependency>        <!--引入zkclient,可能会日志冲突,还需要剔除日志依赖-->        <dependency>            <groupId>org.apache.curator</groupId>            <artifactId>curator-framework</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>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-test</artifactId>            <scope>test</scope>        </dependency>    </dependencies>

application.properties

server.port=8001# 服务应用名字dubbo.application.name=provider-server# 注册中心地址dubbo.registry.address=zookeeper://127.0.0.1:2181# 哪些服务要被注册dubbo.scan.base-packages=com.wlm.service

TicketService

package com.wlm.service;public interface TicketService {    public String getTicket();}

TicketServiceImpl.java

package com.wlm.service;import org.apache.dubbo.config.annotation.Service;import org.springframework.stereotype.Component;//zookeeper:服务注册与发现@Service //可以被扫描到，在项目一启动就自动注册到注册中心@Component //使用了Dubbo后尽量不要用Service注解public class TicketServiceImpl implements TicketService {    @Override    public String getTicket() {        return "咸鱼_翻身";    }}

2.启动服务端

打开服务端，开启之后不要点掉，让他在后台运行：

执行服务端的jar包，待会我们要监控服务端：

运行上面的服务端代码，然后去游览器中查看
http://localhost:7001/

3.我们再来做客户端

pom.xml

<dependencies>        <!--导入相关的依赖-->        <!--导入依赖：Dubbo + zookeeper-->        <dependency>            <groupId>org.apache.dubbo</groupId>            <artifactId>dubbo-spring-boot-starter</artifactId>            <version>2.7.3</version>        </dependency>        <!--引入zkclient-->        <dependency>            <groupId>com.github.sgroschupf</groupId>            <artifactId>zkclient</artifactId>            <version>0.1</version>        </dependency>        <!--引入zkclient,可能会日志冲突,还需要剔除日志依赖-->        <dependency>            <groupId>org.apache.curator</groupId>            <artifactId>curator-framework</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>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-test</artifactId>            <scope>test</scope>        </dependency>    </dependencies>

application.properties

server.port=8002# 消费者去哪里拿服务，需要暴露自己的名字dubbo.application.name=consumer-server# 注册中心的地址，可以在任何电脑上！dubbo.registry.address=zookeeper://127.0.0.1:2181

TicketService

package com.wlm.service;public interface TicketService {    public String getTicket();}

UserService.java

package com.wlm.service;import org.apache.dubbo.config.annotation.Reference;import org.springframework.stereotype.Service;@Service //放到容器中，注意区分public class UserService {    //想拿到provider-server提供的票，要去注册中心拿到服务    @Reference //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("在注册中心拿到=>"+ticket);    }}

ConsumerServerApplicationTests.java

package com.wlm;import com.wlm.service.UserService;import org.junit.jupiter.api.Test;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest;@SpringBootTestclass ConsumerServerApplicationTests {    @Autowired    UserService userService;    @Test    void contextLoads() {        userService.buyTicket();    }}

运行ConsumerServerApplicationTests.java结果：拿到服务端的”咸鱼_翻身“

4.总结

前提：zookeeper服务已经开启

首先提供者提供服务

• 导入依赖

• 配置注册中心的地址，以及服务发现名，和要扫描的包

• 在想要被注册的服务上面增加一个注解@Service

消费者如何消费

• 导入依赖

• 配置注册中心的地址，配置自己的服务名

• 从远程注入服务 @Reference

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