springboot2.0+dubbo整合分佈式服務發佈和調用

最近項目上要對之前的老項目作分佈式的整改，所以我專門花了點時間研究下當前比較熱門的dubbo和springboot結合使用，之前使用過dubbo，可是沒有與springboot結合過，在網上查了點資料，感受要麼是springboot版本太低，要麼是dubbo版本太低，反正基本是千篇一概，查考價值不大。下面咱們就直入主題，看下springboot+dubbo的簡單使用：java

首先是新建三個項目：dubbo-common：主要存放服務發佈的接口以及發佈和調用端的公共對象，dubbo-provider：服務提供方 dubbo-consumer：服務消費方。新建項目就不說了，直接上maven依賴，其中dubbo-provier和dubbo-consumer的依賴基本同樣git

<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>

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你們從pom文件中能夠看到，個人項目使用的是springboot的2.0.4版本，dubbo使用的是2.6.2，重點是dubbo和springboot的結合包使用的是以下依賴：github

<dependency>
<groupId>com.alibaba.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>0.2.0</version>
</dependency>web

這個很重要，由於不一樣的dubbo和springboot的版本不同，可能要選擇的結合包也不同。這裏我只展現使用xml來實現簡單功能，首先咱們先來看xml配置使用：spring

第一：在公共模塊增長一個接口代碼，代碼略apache

第二：在提供方實現相應的接口，代碼沒有任何業務邏輯，只是演示用，json

 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 }

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第三：配置dubbo.xml文件具體以下代碼：瀏覽器

<?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"> <!-- 提供方應用信息，用於計算依賴關係 --> <dubbo:application name="dubbo-provider" /> <dubbo:registry address="zookeeper://localhost:2181" /> <!-- 用dubbo協議在20880端口暴露服務 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- 聲明須要暴露的服務接口 --> <dubbo:service interface="org.yongcheng.liuyang.service.TestService" ref="demoService" /> <!-- 和本地bean同樣實現服務 --> <bean id="demoService" class="org.yongcheng.liuyang.service.impl.TestServiceImpl" /> </beans>

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第四：提供程序啓動類springboot

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); } }

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好了提供方的代碼完成，接下倆就是消費方的步驟：app

消費方的pom依賴和提供方基本同樣，直接複用，可是因爲消費方使用的是web工程，所以須要多一個依賴：

<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>

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第二：簡單業務代碼實現：

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); } }

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第三：配置dubbo.xml文件具體以下代碼：

<?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">
 
    <!-- 提供方應用信息，用於計算依賴關係 -->
    <dubbo:application name="dubbo-consumer"  />
 
    <dubbo:registry address="zookeeper://localhost:2181" />
 
    <!-- 用dubbo協議在20880端口暴露服務 -->
    <dubbo:protocol name="dubbo" port="20880" />
 
    <!-- 聲明須要暴露的服務接口 -->
    <dubbo:reference interface="org.yongcheng.liuyang.service.TestService" id="demoService" />
 
</beans>

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第四：提供程序啓動類

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); } }

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好了，這樣總體的發佈和調用代碼已經完畢，接下來先啓動提供方的代碼，而後在啓動調用方的程序，而後咱們在瀏覽器中輸入咱們的url進行驗證便可！

若是有朋友須要註解實現的代碼，請留言！！！