Java Dubbo：（五）Spring Boot 整合 Dubbo-7000字匠心出品

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本文详细介绍了如何在SpringBoot项目中整合Dubbo，包括创建服务接口、实现服务提供者（Provider）、配置Dubbo、创建服务消费者（Consumer）并进行远程调用的全过程。涉及的内容包括添加依赖、实现接口、配置Zookeeper注册中心以及启动和测试。

Spring Boot 整合 Dubbo

1.创建服务接口

1.1 创建项目

首先通过这个选项创建一个空的框架
而后在里面创建model
第一个项目为普通的maven项目

1.2 添加接口

package com.dqcgm.dubbo.service;

public interface DemoDubboService {
    String showMsg(String str);
}

2.创建 Provider

2.1 创建项目

spring boot项目

2.2 修改 POM 文件添加依赖

（今天不知道为什么我dubbo-registry-zookeeper中的curator-recipes4.0.1版本老是下载不了，于是我就把他剔除了，然后重新下的，大家下载没有问题的话可以忽略这步）

<?xml version="1.0" encoding="UTF-8"?>

4.0.0

org.springframework.boot
spring-boot-starter-parent
2.3.2.RELEASE

com.dqcgm
springbootdubbo_provider
0.0.1-SNAPSHOT
springbootdubbo_provider
Demo project for Spring Boot

<properties>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>com.dqcgm</groupId>
        <artifactId>springbootdubbo_api</artifactId>
        <version>1.0-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.dubbo</groupId>
        <artifactId>dubbo-spring-boot-starter</artifactId>
        <version>2.7.6</version>
    </dependency>
    <dependency>
        <groupId>org.apache.dubbo</groupId>
        <artifactId>dubbo-registry-zookeeper</artifactId>
        <version>2.7.4</version>
        <exclusions>
            <exclusion>
                <groupId>org.apache.curator</groupId>
                <artifactId>curator-recipes</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-recipes</artifactId>
        <version>4.2.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.junit.vintage</groupId>
                <artifactId>junit-vintage-engine</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

2.3 添加接口实现

package com.dqcgm.springbootdubbo_provider.service.impl;

import com.dqcgm.dubbo.service.DemoDubboService;
import org.apache.dubbo.config.annotation.Service;

@Service
public class DemoDubboServiceImpl implements DemoDubboService {
    @Override
    public String showMsg(String str) {
        return "Hello Dubbo "+str;
    }
}

2.4 在配置文件中配置 Dubbo

原本是application.properties（自动生成的），改了后缀变成了application.yml

dubbo:
application:
name: myProvider
registry:
address: zookeeper://192.168.0.110:2181?backup=192.168.0.110:2182,192.168.0.110:2183
timeout: 15000

protocol:
name: dubbo
port: 20880
scan:
base-packages: com.dqcgm.springbootdubbo_provider.service.impl

2.5 启动 Provider

2.5.1 通过 spring-boot-starter-web 启动 Dubbo（POM文件中的启动器）

如果在项目中添加的是 spring-boot-starter-web 启动器，那么在启动 dubbo 后还会监听一个端口，因为在 web 启动器中内置了一个 Tomcat，Tomcat 的启动不会影响 dubbo 的运行，但是会多占用一个端口，未来在其他的 Provider 中还需要考虑端口分配的问题，避免端口抢占

2.5.2 通过 spring-boot-starter 启动 Dubbo

可以使用 spring-boot-starter 起来启动 Dubbo，在该启动器中并未包含 Tomcat 所以并不会监听端口。

3.创建 Consumer

3.1创建项目

spring boot项目

3.2修改 POM 文件添加依赖

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.dqcgm</groupId>
    <artifactId>springbootdubbo_consumer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springbootdubbo_consumer</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.dqcgm</groupId>
            <artifactId>springbootdubbo_api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.6</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-zookeeper</artifactId>
            <version>2.7.4</version>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.curator</groupId>
                    <artifactId>curator-recipes</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>4.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3.3编写配置文件

application.yml

dubbo:
application:
name: myConsumer
registry:
address: zookeeper://192.168.0.110:2181?backup=192.168.0.110:2182,192.168.0.110:2183
timeout: 10000

protocol:
name: dubbo

3.4实现远程调用

3.4.1创建业务层

package com.dqcgm.springbootdubbo_consumer.service;

public interface DemoService {
    String getMsg(String str);
}


package com.dqcgm.springbootdubbo_consumer.service.impl;

import com.dqcgm.dubbo.service.DemoDubboService;
import com.dqcgm.springbootdubbo_consumer.service.DemoService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Service;

@Service
public class DemoServiceImpl implements DemoService {

    @Reference
    private DemoDubboService demoDubboService;

    @Override
    public String getMsg(String str) {
        return this.demoDubboService.showMsg(str);
    }
}

3.4.2创建 Controller 层

package com.dqcgm.springbootdubbo_consumer.controller;

import com.dqcgm.springbootdubbo_consumer.service.DemoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoController {

    @Autowired
    private DemoService demoService;

    @RequestMapping("/getMsg")
    public String getMsg(String str) {
        return this.demoService.getMsg(str);
    }
}