最近项目上要对以前的老项目做分布式的整改，因此我专门花了点时间研究下当前比较热门的dubbo和springboot结合使用，以前使用过dubbo，但是没有与springboot结合过，在网上查了点资料，感觉要么是springboot版本过低，要么是dubbo版本过低，反正基本是千篇一律，查考价值不大。下面我们就直入主题，看下springboot+dubbo的简单使用：
首先是新建三个项目：dubbo-common： 主要存放服务发布的接口以及发布和调用端的公共对象，dubbo-provider： 服务提供方 dubbo-consumer： 服务消费方。新建项目就不说了，直接上maven依赖，其中dubbo-provier和dubbo-consumer的依赖基本一样
<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>org.dubbo</groupId> <artifactId>dubbo-provider</artifactId> <version>0.0.1-SNAPSHOT</version> <!-- 引入springboot --> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.4.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.6.2</version> <exclusions> <exclusion> <artifactId>spring</artifactId> <groupId>org.springframework</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.alibaba.boot</groupId> <artifactId>dubbo-spring-boot-starter</artifactId> <version>0.2.0</version> </dependency> <dependency> <groupId>org.javassist</groupId> <artifactId>javassist</artifactId> <version>3.20.0-GA</version> </dependency> <dependency> <groupId>org.jboss.netty</groupId> <artifactId>netty</artifactId> <version>3.2.5.Final</version> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.10</version> <exclusions> <exclusion> <artifactId>slf4j-log4j12</artifactId> <groupId>org.slf4j</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.github.sgroschupf</groupId> <artifactId>zkclient</artifactId> <version>0.1</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <!-- Spingboot的插件 --> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
大家从pom文件中可以看到，我的项目使用的是springboot的2.0.4版本，dubbo使用的是2.6.2，重点是dubbo和springboot的结合包使用的是如下依赖：
<dependency>
<groupId>com.alibaba.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>0.2.0</version>
</dependency>
这个很重要，因为不同的dubbo和springboot的版本不一样，可能要选择的结合包也不一样。这里我只展示使用xml来实现简单功能，首先我们先来看xml配置使用：
第一：在公共模块增加一个接口代码，代码略
第二：在提供方实现相应的接口，代码没有任何业务逻辑，只是演示用，
1 package org.yongcheng.liuyang.service.impl;
2
3 import org.yongcheng.liuyang.service.TestService;
4
5 import com.alibaba.dubbo.config.annotation.Service;
6
7 //@Service(version = "1.0.0")
8 @org.springframework.stereotype.Service
9 public class TestServiceImpl implements TestService {
10
11 @Override
12 public String sayHello(String name) {
13 return name+"hello";
14 }
15 }
第三：配置dubbo.xml文件具体如下代码：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://dubbo.apache.org/schema/dubbo
http://dubbo.apache.org/schema/dubbo/dubbo.xsd">
<!-- 提供方应用信息，用于计算依赖关系 -->
<dubbo:application name="dubbo-provider" />
<dubbo:registry address="zookeeper://localhost:2181" />
<!-- 用dubbo协议在20880端口暴露服务 -->
<dubbo:protocol name="dubbo" port="20880" />
<!-- 声明需要暴露的服务接口 -->
<dubbo:service interface="org.yongcheng.liuyang.service.TestService" ref="demoService" />
<!-- 和本地bean一样实现服务 -->
<bean id="demoService" class="org.yongcheng.liuyang.service.impl.TestServiceImpl" />
</beans>
第四：提供程序启动类
package org.yongcheng.liuyang; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.ImportResource; @SpringBootApplication @ImportResource("classpath:dubbo.xml") public class ProviderApp { public static void main(String[] args) throws Exception { SpringApplication.run(ProviderApp.class, args); } }
好了提供方的代码完成，接下俩就是消费方的步骤：
消费方的pom依赖和提供方基本一样，直接复用，但是由于消费方使用的是web工程，因此需要多一个依赖：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
第一：pom文件：
<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>org.yongcheng.liuyang</groupId> <artifactId>dubbo-consumer</artifactId> <version>0.0.1-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.4.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <dependencies> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.6.2</version> <exclusions> <exclusion> <artifactId>spring</artifactId> <groupId>org.springframework</groupId> </exclusion> </exclusions> </dependency> <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>0.2.0</version> </dependency> <dependency> <groupId>org.javassist</groupId> <artifactId>javassist</artifactId> <version>3.20.0-GA</version> </dependency> <dependency> <groupId>org.jboss.netty</groupId> <artifactId>netty</artifactId> <version>3.2.5.Final</version> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.10</version> <exclusions> <exclusion> <artifactId>slf4j-log4j12</artifactId> <groupId>org.slf4j</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.github.sgroschupf</groupId> <artifactId>zkclient</artifactId> <version>0.1</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <!-- Spingboot的插件 --> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
第二：简单业务代码实现：
package org.yongcheng.liuyang.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import org.yongcheng.liuyang.service.TestService; import com.alibaba.dubbo.config.annotation.Reference; @RestController @RequestMapping(produces="application/json;charset=UTF-8") public class IndexActroller { // @Reference(url="dubbo://localhost:20880") @Autowired private TestService testService; @GetMapping("/sayHello") public String sayHello(String name){ return testService.sayHello(name); } }
第三：配置dubbo.xml文件具体如下代码：
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://dubbo.apache.org/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd"> <!-- 提供方应用信息，用于计算依赖关系 --> <dubbo:application name="dubbo-consumer" /> <dubbo:registry address="zookeeper://localhost:2181" /> <!-- 用dubbo协议在20880端口暴露服务 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- 声明需要暴露的服务接口 --> <dubbo:reference interface="org.yongcheng.liuyang.service.TestService" id="demoService" /> </beans>
第四：提供程序启动类
package org.yongcheng.liuyang; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.ImportResource; @SpringBootApplication @ImportResource("classpath:dubbo.xml") public class ConsumerApp { public static void main(String[] args) throws Exception { SpringApplication.run(ConsumerApp.class, args); } }
好了，这样整体的发布和调用代码已经完毕，接下来先启动提供方的代码，然后在启动调用方的程序，然后我们在浏览器中输入我们的url进行验证即可！
如果有朋友需要注解实现的代码，请留言！！！