Dubbo2.6之如何把提供者上传到注册中心

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <!--添加SpringBoot parent支持-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
    </parent>


    <groupId>cn.itcast.dubbo</groupId>
    <artifactId>itcast-dubbo</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>itcast-dubbo-service</module>
    </modules>

    <dependencies>
        <!--添加SpringBoot测试类-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--添加dubbo的springboot依赖-->
        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>0.2.0</version>
        </dependency>
        <!--添加dubbo依赖-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.6.4</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <!--添加springboot的maven插件-->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3.子工程的Pom依赖

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>itcast-dubbo</artifactId>
        <groupId>cn.itcast.dubbo</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>cn.itcast.dubbo</groupId>
    <artifactId>itcast-dubbo-service</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <!--添加springboot依赖，非web项目-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.13</version>
        </dependency>
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>
    </dependencies>
</project>

4.创建User对象

使用dubbo要求传输的对象必须实现序列化接口

package cn.itcast.dubbo.pojo;

// 使用dubbo要求传输的对象必须实现序列化接口
public class User implements java.io.Serializable{

    private static final long serialVersionUID = -7341603933521593227L;
    private Long id;
    private String username;
    private String password;
    private Integer age;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

5.创建UserService（接口）提供查询服务

package cn.itcast.dubbo.service;

import cn.itcast.dubbo.pojo.User;
import java.util.List;

public interface UserService {
    /**
     * 查询所有的用户数据
     * @return
     */
    List<User> queryAll();
}

6.创建UserServiceImpl实现类

package cn.itcast.dubbo.service.impl;

import cn.itcast.dubbo.pojo.User;
import cn.itcast.dubbo.service.UserService;
import com.alibaba.dubbo.config.annotation.Service;

import java.util.ArrayList;
import java.util.List;

@Service(version = "${dubbo.service.version}") //声明这是一个dubbo服务
public class UserServiceImpl implements UserService {
    /**
     * 实现查询，这里做模拟实现，不做具体的数据库查询
     */
    @Override
    public List<User> queryAll() {
        List<User> list = new ArrayList<User>();
        for (int i = 0; i < 10; i++) {
            User user = new User();
            user.setAge(10 + i);
            user.setId(Long.valueOf(i + 1));
            user.setPassword("123456");
            user.setUsername("username_" + i);
            list.add(user);
        }
        return list;
    }
}

7.编写配置文件

记得把注册中心的ip换成你zk所在的ip

# Spring boot application
spring.application.name = itcast-dubbo-service
server.port = 9090
# Service version
dubbo.service.version = 1.0.0
# 服务的扫描包
dubbo.scan.basePackages = cn.itcast.dubbo.service
# 应用名称
dubbo.application.name = dubbo-provider-demo
# 协议以及端口
dubbo.protocol.name = dubbo
dubbo.protocol.port = 20880
# zk注册中心
dubbo.registry.address = zookeeper://192.168.62.132:2181
dubbo.registry.client = zkclient

8.编写启动类

package cn.itcast.dubbo;

import org.springframework.boot.WebApplicationType;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;

@SpringBootApplication
public class DubboProvider {
    public static void main(String[] args) {
        new SpringApplicationBuilder(DubboProvider.class)
            .web(WebApplicationType.NONE)  //非web应用
            .run(args);
    }
}