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-providerserver.port=11222dubbo.application.id=${spring.application.name}dubbo.application.name=${spring.application.name}dubbo.protocol.port = 28820dubbo.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=dubbodubbo.provider.protocol=dubbodubbo.provider.version=1.0.0dubbo.provider.timeout=30000

SayFacadeImpl.java

package com.btd.qbs.service;import com.btd.qbs.facade.SayFacade;import org.apache.dubbo.config.annotation.Service;@Servicepublic 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-consumerserver.port=11121dubbo.application.id=${spring.application.name}dubbo.application.name=${spring.application.name}dubbo.protocol.port=28820dubbo.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=1.0.0dubbo.consumer.check=falsedubbo.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；

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