SpringBoot整合Dubbo案例

使用框架：

1. jdk 1.8

2. springboot-2.1.3

3. dubbo-2.6

4. spring-data-jpa-2.1.5

一、開發(fā)dubbo服務接口：

按照Dubbo官方開發(fā)建議，創(chuàng)建一個接口項目，該項目只定義接口和model類；

1、創(chuàng)建springboot工程 spring-boot-demo-dubbo-interface

坐標：

<groupId>com.example</groupId>
<artifactId>spring-boot-demo-dubbo-interface</artifactId>
<version>0.0.1-SNAPSHOT</version>

添加spring-data-jpa 依賴：

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

2、創(chuàng)建model

package com.example.demo.model;

@Entity
public class User implements Serializable{
    private static final long serialVersionUID = 1L;

    @Id @GeneratedValue
    private long id;
    private String userName;
    private String password;
    private int age;
    public long getId() {
        return id;
    }
//省略set get 方法

3、創(chuàng)建接口：

package com.example.demo.service;

import com.example.demo.model.User;

public interface UserService {

    public void save(User user);

    public String sayHello(String word);
}

4、使用命令 clean install 打包安裝到maven倉庫。

阿里巴巴提供的dubbo集成springboot開源項目；

參考文檔：

https://github.com/apache/dubbo-spring-boot-project/blob/0.2.x/README_CN.md

本工程采用該項目的jar包進行繼承：

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

二、開發(fā)dubbo服務提供者:

1、創(chuàng)建一個Springboot項目spring-boot-demo-dubbo-provider并配置好相關的依賴；

pom.xml

<dependencies>
        <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>

        <!-- 加入springboot與dubbo集成的起步依賴 -->
        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>0.2.0</version>
        </dependency>

        <!-- 由于使用了zookeeper作為注冊中心，則需要加入zookeeper的客戶端jar包： -->
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.10</version>
        </dependency>

        <!-- spring-data-jpa -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- 添加接口服務 -->
        <dependency>
            <groupId>com.example</groupId>
            <artifactId>spring-boot-demo-dubbo-interface</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
    </dependencies>

2、在Springboot的核心配置文件application.properties中配置dubbo的信息：

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true
spring.datasource.username=root
spring.datasource.password=root

spring.jpa.properties.hibernate.hbm2ddl.auto=create
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.properties.hibernate.format_sql=true
spring.jpa.show-sql=true

# 訪問端口
server.port=8080
# dubbo配置
dubbo.application.name=springboot-dubbo-provider
dubbo.registry.address=zookeeper://192.168.146.128:2181

3、開發(fā)編寫Dubbo的接口實現(xiàn)類：

package com.example.demo.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.alibaba.dubbo.config.annotation.Service;
import com.example.demo.model.User;
import com.example.demo.repository.UserRepository;

@Component //注冊為spring bean
@Service // 這注解是dubbo提供的 
public class UserServiceImpl implements UserService {

    @Autowired
    private UserRepository userRepository;

    @Override
    public void save(User user) {
        userRepository.save(user);
    }

    @Override
    public String sayHello(String word) {
        return word;
    }
}

4、入口main程序啟動Dubbo服務提供者：添加注解 @EnableDubbo

package com.example.demo;

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

import com.alibaba.dubbo.config.spring.context.annotation.EnableDubbo;

@SpringBootApplication
@EnableDubbo
public class SpringBootDemoDubboProviderApplication {

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

}

啟動main ，服務發(fā)布到zookeeper 注冊中心。

三、開發(fā)dubbo服務消費者：

1、創(chuàng)建一個Springboot項目spring-boot-demo-dubbo-consumer并配置好相關的依賴；

2、加入springboot與dubbo集成的起步依賴：(pom.xml 配置同上)

注意： 服務提供者 和 消費者都要配置 服務接口依賴

3、在Springboot的核心配置文件application.properties中配置dubbo的信息：

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true
spring.datasource.username=root
spring.datasource.password=root

# WEB\u670D\u52A1\u7AEF\u53E3
server.port=8081
# dubbo\u914D\u7F6E
dubbo.application.name=springboot-dubbo-consumer
dubbo.registry.address=zookeeper://192.168.146.128:2181 

4、編寫一個Controller類，調用遠程的Dubbo服務：

package com.example.demo.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.alibaba.dubbo.config.annotation.Reference;
import com.example.demo.model.User;
import com.example.demo.service.UserService;

@RestController
public class UserController {

    @Reference //該注解是dubbo提供的
    private UserService userService;

    @RequestMapping("/say")
    public String sayHello(String name) {
        return userService.sayHello(name);
    }

    @RequestMapping("/save")
    public void save() {
        User u = new User();
        u.setAge(20);
        u.setPassword("123");
        u.setUserName("zheng");
        userService.save(u);
    }
}

5、啟動類添加 開啟dubbo 注解 @EnableDubbo

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import com.alibaba.dubbo.config.spring.context.annotation.EnableDubbo;

@SpringBootApplication
@EnableDubbo
public class SpringBootDemoDubboConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringBootDemoDubboConsumerApplication.class, args);
    }
}

6、啟動main方法。

7、調用遠程接口：

http://localhost:8081/say?name=hello

一個SpringBoot基于Dubbo的服務接口開發(fā)完成。