一、什么是Spring Boot ？

现阶段的 Spring Boot 可谓是太火了，为什么呢？因为使用方便、配置简洁、上手快速，那么它是什么？从官网上我们可以看到，它是 Spring 开源组织下的一个子项目，主要简化了 Spring 繁重的配置，而且 Spring Boot 内嵌了各种 Servlet 容器，如：Tomcat、Jetty 等

官方网站：http://projects.spring.io/spring-boot/GitHub源码：https://github.com/spring-projects/spring-boot

二、Spring Boot 的优势？

1、独立运行：不需要在用 tomcat 等容器运行。2、简化配置：不需要在像 Spring mvc 那样配置很多的xml了；3、自动配置：根据包路径自动配置 bean4、应用监控：Spring Boot 提供监控服务

三、项目创建

1、创建提供者

后面点击 finish，创建完毕，然后删掉多余包，使得项目结构如下图：

右击项目，新建一个提供者对外提供服务的模块 qbs-facade

然后再按照该模式创建一个 qbs-web 模块（这里就不介绍了）最终的项目结构如下图所示：

修改主 pom 文件

<?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>
    <packaging>pom</packaging>
    <groupId>com.btd</groupId>
    <artifactId>qbs</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>qbs</name>

    <modules>
        <module>qbs-facade</module>
        <module>qbs-api</module>
    </modules>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
        <relativePath/>
    </parent>

    <properties>
        <java.version>1.8</java.version>
        <dubbo.version>2.7.1</dubbo.version>
    </properties>

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

</project>

3、编写 facade

SayFacade.java

package com.btd.qbs.facade;

public interface SayFacade {
    String say(String context);
}

facade 模块的 xml 文件，它只是对外提供一下接口的，所以不需要其它东西

<?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.btd</groupId>
    <artifactId>qbs-facade</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>qbs-facade</name>
    <packaging>jar</packaging>

</project>

4、组织api模块，实际接口的实现

先看 pom.xml 文件

<?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">
    <parent>
        <artifactId>qbs</artifactId>
        <groupId>com.btd</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>qbs-api</artifactId>
    <packaging>jar</packaging>


    <dependencies>
        <!-- spring boot 相关 start  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </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>
        <!-- spring boot 相关 end  -->

        <!--dubbo 相关-->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper</artifactId>
            <version>${dubbo.version}</version>
            <type>pom</type>
        </dependency>
        <!-- dubbo 相关依赖 end-->

        <dependency>
            <groupId>com.btd</groupId>
            <artifactId>qbs-facade</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

</project>

application.properties 文件

spring.application.name=qbs-provider

server.port=11222

dubbo.application.id=${spring.application.name}
dubbo.application.name=${spring.application.name}
dubbo.protocol.port = 28820
dubbo.protocol.name=${spring.application.name}

# zk注册中心地址
dubbo.registry.address=zookeeper://127.0.0.1:2181

# 提供者配置
dubbo.provider.name=dubbo
dubbo.provider.protocol=dubbo
dubbo.provider.version=1.0.0
dubbo.provider.timeout=30000

SayFacadeImpl.java

package com.btd.qbs.service;

import com.btd.qbs.facade.SayFacade;
import org.apache.dubbo.config.annotation.Service;

@Service
public class SyaFacadeImpl implements SayFacade {

    @Override
    public String say(String context) {
        return "小肥羊对你说："+context;
    }
}

启动文件 Application.java

package com.btd.qbs;

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

@EnableDubbo
@SpringBootApplication(exclude = MongoAutoConfiguration.class)
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class);
    }
}

OK ,到这里来说，我们的提供者就完成了，启动项目，然后我们看看 dubbo-admin

这里要注意，因为我们的 facade 是对外需要映入的，所以我们打个 jar 包

打完包后，我们会得到一个 jar 文件

2、建立消费者

引入我们打的 jar 包

配置文件：

spring.application.name=qbs-consumer

server.port=11121
dubbo.application.id=${spring.application.name}
dubbo.application.name=${spring.application.name}
dubbo.protocol.port=28820
dubbo.protocol.name=dubbo

# zk注册中心地址
dubbo.registry.address=zookeeper://172.25.37.130:2181

# 消费者配置
dubbo.consumer.version=1.0.0
dubbo.consumer.check=false
dubbo.consumer.timeout=8000

pom.xml 文件

<?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>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.btd.abs</groupId>
    <artifactId>qbs-consumer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>qbs-consumer</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <dubbo.version>2.7.1</dubbo.version>
    </properties>

    <dependencies>
        <!-- spring boot 相关 start  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </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>
        <!-- spring boot 相关 end  -->

        <!--dubbo 相关-->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper</artifactId>
            <version>${dubbo.version}</version>
            <type>pom</type>
        </dependency>
        <!-- dubbo 相关依赖 end-->

        <!-- 基础依赖 start -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.59</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>provided</scope>
        </dependency>
        <!-- 基础依赖 end -->

    </dependencies>

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

Application.java 文件

package com.btd.abs;

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

@EnableDubbo
@SpringBootApplication(exclude = MongoAutoConfiguration.class)
public class Application {

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

DbsController.java 文件

package com.btd.abs.controller;

import com.btd.qbs.facade.SayFacade;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;


@RestController
@RequestMapping("/qbs")
public class DbsController {

    @Reference
    private SayFacade sayFacade;

    @GetMapping("/say")
    @ResponseBody
    public String say(String context) {
         return sayFacade.say(context);
    }
}

最后调用结果：http://localhost:11121/qbs/say?context=asde3

好了，这是spring boot 集成 dubbo的一整套商业使用的代码事例，按着从上到下的操作，是完全OK的；

有兴趣的可以关注下我的公众号哦！

原创文章，转载请声明，感谢！！！！！！