spring-boot整合dubbo启动demo

参考资料：

https://docs.spring.io/spring-boot/docs/2.1.7.RELEASE/reference/html/

https://github.com/apache/dubbo-spring-boot-project

https://github.com/spring-cloud/spring-cloud-zookeeper/issues/36

1、spring boot配置

https://docs.spring.io/spring-boot/docs/2.1.7.RELEASE/reference/html/getting-started-installing-spring-boot.html#getting-started-maven-installation

maven配置

<?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.</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>myproject</artifactId>
    <version>0.0.-SNAPSHOT</version>

    <!-- Inherit defaults from Spring Boot -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1..RELEASE</version>
    </parent>

    <!-- Add typical dependencies for a web application -->
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

    <!-- Package as an executable jar -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

java代码：

https://docs.spring.io/spring-boot/docs/2.1.7.RELEASE/reference/html/getting-started-first-application.html#getting-started-first-application-run

import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.web.bind.annotation.*;

@RestController
@EnableAutoConfiguration
public class Example {

	@RequestMapping("/")
	String home() {
		return "Hello World!";
	}

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

}

　　到这里spring-boot的web程序就搭建好了；

2、整合dubbo

　　2.1、准备zk（zookeeper）环境

　　　　官网下载zk：https://zookeeper.apache.org/releases.html

　　　　下载后解压到本地目录；

　　　　编辑并配置zoo.cfg文件(zk目录下/config/zoo.cfg)

tickTime=2000
initLimit=10
syncLimit=5
dataDir=E:\zk\zookeeper-3.4.9\datas
clientPort=2181

　　　　执行 bin/zkServer.cmd 启动zk服务

　　　　ps：这里就准备好zk环境了，如果想直观的看到zk的节点及目录信息可以使用工具 https://github.com/DeemOpen/zkui 查看，java实现，mvn package 后通过java -jar执行即可访问；

　　2.2、dubbo配置

　　　　这里使用apache项目下的dubbo项目启动器（alibaba的启动器已经不维护了，不推荐使用）

　　　　项目此时maven依赖：

　　　　

　　<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- 解决 java.lang.NoClassDefFoundError: org/apache/curator/framework/recipes/cache/TreeCacheListener 问题 -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.8.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.3</version>
        </dependency>
    </dependencies>

　　新增服务及服务实现

　　

package cn.jsu.wyk.service.impl;

import cn.jsu.wyk.service.PayService;
import com.alibaba.dubbo.config.annotation.Service;

@Service(version = "1.0.0")
public class PayServiceImpl implements PayService {

  public String pay(){
    return "pay success";
  }
}

　　增加应用全局参数 application.properties

server.port=8081

## Dubbo 服务提供者配置
spring.application.name=dubbo-spring-boot-starter
dubbo.registry.address=zookeeper://localhost:2181
dubbo.protocol.name=dubbo
dubbo.protocol.port=20880
dubbo.scan.base-packages=cn.jsu.wyk.service

　　至此配置完毕，启动测试，在zkui中能看到注册服务即大功告成