Dubbo+Zookeeper 使用 SpringBoot (dubbo-spring-boot-starter) 快速搭建RPC分布式

一.安装并启动Zookeeper

看看这篇博文吧，我就不赘述了 https://blog.csdn.net/lisongjia123/article/details/78639242

二.创建公共接口

新建一个maven项目

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image.png
创建接口：

package com.zc.dubbo.service;

public interface DemoService {
    String sayHello(String name);
}

把项目打包成jar包

打包

jar包

三.创建服务提供者

先创建一个空的springboot项目,加入dubbo-spring-boot-starter依赖

      <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>RELEASE</version>
        </dependency>

导入之前生成的公共接口jar包（不会导入自行百度）

image.png

3.实现公共接口，并添加dubbo的@service（注意不是spring的service注解，看导包）
实现类：

package com.zc.dubboprovider.service.impl;

import com.alibaba.dubbo.config.annotation.Service;
import com.zc.dubbo.service.DemoService;

@Service
public class DemoServiceImpl implements DemoService {
    @Override
    public String sayHello(String name) {
            return "Hello, " + name + " (from Spring Boot)";
    }
}

配置文件
先把properties文件修改为yml文件（习惯使用yml文件，也可不改）

#dubbo协议
dubbo:
  protocol:
    id: dubbo
    name: dubbo
    port: 12345
    status: server
#注册中心地址
  registry:
    address: zookeeper://localhost:2181
#dubbo应用名
  application:
    name: dubbo-provider-demo

在启动类上开启dubbo服务并扫描服务类

package com.zc.dubboprovider;

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

@SpringBootApplication
@EnableDubbo(scanBasePackages = "com.zc.dubboprovider.service.impl")
public class DubboProviderApplication {

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

启动生产者

四.创建服务消费者

同样新建springboot项目，加入dubbo-spring-boot-starter依赖，消费者要测试访问所以加入web依赖：

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>RELEASE</version>
        </dependency>

导入公共接口的依赖
配置文件

server:
  port: 8080

dubbo:
  protocol:
    id: dubbo
    name: dubbo

  registry:
    address: zookeeper://localhost:2181

  application:
    name: dubbo-consumer-demo

编写controller类，并使用dubbo的 @Reference 注入公共接口，dubbo会自动去注册中心找相应服务的生产者，并通过dubbo协议调用相应方法

package com.zc.dubboconsumer.controller;

import com.alibaba.dubbo.config.annotation.Reference;
import com.zc.dubbo.service.DemoService;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

@RestController
public class DemoController {
    @Reference
    private DemoService demoService;

    @RequestMapping("/sayHello")
    public String sayHello(@RequestParam String name) {
        return demoService.sayHello(name);
    }
}

5.在启动类上开启dubbo并扫描controller类（不加也可以，因为加了@RestController Spring会自动扫描相应的类,但有时不会加载 @Reference，最好写上）

package com.zc.dubboconsumer;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@EnableDubbo(scanBasePackages = "com.zc.dubboconsumer.controller")
public class DubboConsumerApplication {

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