Dubbo入门(六)SpringBoot整合Dubbo

本文介绍如何使用SpringBoot开发Dubbo服务提供者和消费者。通过配置Maven依赖、application.properties及编写服务接口实现等步骤,实现基于Zookeeper注册中心的服务发布与调用。

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前言

     本章讲解SpringBoot整合Dubbo的相关知识

方法

1.概念

我们知道,在之前的学习中,我们仅仅采用了普通的Java工程结合Spring编写了Dubbo的Provider和Consumer。

由于Provider需要单独的部署,那么以前的思维是使用Assembly插件,但是由于近年来SpringBoot出色的能力,我们决定使用SpringBoot来开发我们的Provider和Consumer。

2.SpringBoot开发Provider

1)创建Provider工程

2)修改pom文件,引入必要的依赖

<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>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.7.RELEASE</version>
	</parent>
	<groupId>cn.edu.ccut</groupId>
	<artifactId>springboot-dubbo-provider</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	
	<properties>
		<!-- 设定Java的版本 -->
		<java.version>1.8</java.version>
		<!-- 解决pom.xml首行报错 -->
		<maven-jar-plugin.version>3.1.0</maven-jar-plugin.version>
	</properties>
	
	<dependencies>
		<!-- SpringBoot启动器 -->
		<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
		<!-- 引入接口项目依赖,必须 -->
		<dependency>
			<groupId>cn.edu.ccut</groupId>
			<artifactId>dubbo-service</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		<!-- 引入dubbo相关的启动器 -->
		<dependency>
		    <groupId>org.apache.dubbo</groupId>
		    <artifactId>dubbo-spring-boot-starter</artifactId>
		    <version>2.7.3</version>
		</dependency>
		<!-- 引入zookeeper框架Curator相关jar坐标 -->
		<dependency>
			<groupId>org.apache.curator</groupId>
			<artifactId>curator-framework</artifactId>
			<version>4.1.0</version>
			<exclusions>
				<exclusion>
					<groupId>org.apache.zookeeper</groupId>
					<artifactId>zookeeper</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.apache.zookeeper</groupId>
			<artifactId>zookeeper</artifactId>
			<version>3.4.9</version>
		</dependency>
		<dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>4.1.0</version>
        </dependency>
	</dependencies>
	
	 <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>cn.edu.ccut.ProviderApp</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
    
</project>

3)配置application.properties

## application.properties
  
  # Spring boot application
  spring.application.name=dubbo-springboot-provider
  
  # Base packages to scan Dubbo Component: @com.alibaba.dubbo.config.annotation.Service
  dubbo.scan.base-packages=cn.edu.ccut.dubbo
  
  # Dubbo Application
  ## The default value of dubbo.application.name is ${spring.application.name}
  ## dubbo.application.name=${spring.application.name}
  
  # Dubbo Protocol
  dubbo.protocol.name=dubbo
  dubbo.protocol.port=20880
  
  ## Dubbo Registry
  dubbo.registry.address=zookeeper://192.168.1.106:2181
  dubbo.metadata-report.address=zookeeper://192.168.1.106:2181
  
  ## DemoService version
  demo.service.version=1.0.0

4)编写service实现类

package cn.edu.ccut.dubbo;


import org.apache.dubbo.config.annotation.Service;

import cn.edu.ccut.dubbo.DemoService;

@Service
public class DemoServiceImpl implements DemoService {

	@Override
	public String getString(String str) {
		// TODO Auto-generated method stub
		return "指定的字符串为:"+str;
	}

}

5)启动类信息

package cn.edu.ccut;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ProviderApp {

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

}

启动项目,观察效果:

注意:确保zookeeper正常打开!

出现上面的信息表示Provider正常启动!

3.SpringBoot开发Consumer

1)创建Consumer工程

2)修改pom文件,加入相关的jar坐标

<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>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.7.RELEASE</version>
	</parent>
	<groupId>cn.edu.ccut</groupId>
	<artifactId>springboot-dubbo-consumer</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	
	<properties>
		<!-- 设定Java的版本 -->
		<java.version>1.8</java.version>
		<!-- 解决pom.xml首行报错 -->
		<maven-jar-plugin.version>3.1.0</maven-jar-plugin.version>
	</properties>
	
	<dependencies>
		<!-- SpringBoot web启动器 -->
		<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- 配置Thymeleaf启动器  -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</dependency>
		<!-- 引入接口项目依赖,必须 -->
		<dependency>
			<groupId>cn.edu.ccut</groupId>
			<artifactId>dubbo-service</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		<!-- 引入dubbo相关的启动器 -->
		<dependency>
		    <groupId>org.apache.dubbo</groupId>
		    <artifactId>dubbo-spring-boot-starter</artifactId>
		    <version>2.7.3</version>
		</dependency>
		<!-- 引入zookeeper框架Curator相关jar坐标 -->
		<dependency>
			<groupId>org.apache.curator</groupId>
			<artifactId>curator-framework</artifactId>
			<version>4.1.0</version>
			<exclusions>
				<exclusion>
					<groupId>org.apache.zookeeper</groupId>
					<artifactId>zookeeper</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.apache.zookeeper</groupId>
			<artifactId>zookeeper</artifactId>
			<version>3.4.9</version>
		</dependency>
		<dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>4.1.0</version>
        </dependency>
	</dependencies>
	
	 <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>cn.edu.ccut.ConsumerApp</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
    
</project>

3)配置application.properties

server.port=8888
## application.properties
  
  # Spring boot application
  spring.application.name=dubbo-springboot-consumer
  
  # Base packages to scan Dubbo Component: @com.alibaba.dubbo.config.annotation.Service
  dubbo.scan.base-packages=cn.edu.ccut.dubbo
  
  # Dubbo Application
  ## The default value of dubbo.application.name is ${spring.application.name}
  ## dubbo.application.name=${spring.application.name}
  
  # Dubbo Protocol
  dubbo.protocol.name=dubbo
  dubbo.protocol.port=20880
  
  ## Dubbo Registry
  dubbo.registry.address=zookeeper://192.168.1.106:2181
  dubbo.metadata-report.address=zookeeper://192.168.1.106:2181

4)编写Controller及其方法

package cn.edu.ccut.controller;

import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import cn.edu.ccut.dubbo.DemoService;

@Controller
public class DemoController {
	
	@Reference
	private DemoService demoService;

	@RequestMapping("/show")
	public String showPage(Model model){
		String msg = demoService.getString("啦啦啦");
		model.addAttribute("msg", msg);
		return "index";
	}
}

5)编写前台页面,使用Thymeleaf

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Dubbo</title>
</head>
<body>
	<span th:text="${msg}"></span>
</body>
</html>

6)启动类信息

package cn.edu.ccut;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ConsumerApp {

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

}

启动项目,访问http://localhost:8888/show,观察效果:

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