Dubbo搭建HelloWorld-搭建服务提供者与服务消费者并完成远程调用(附代码下载)

场景

Dubbo简介与基本概念：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/103555224

Dubbo环境搭建-ZooKeeper注册中心：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/103555470

Dubbo环境搭建-管理控制台dubbo-admin实现服务监控：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/103624846

在上面搭建好ZooKeeper注册中心和管理控制台dubbo-admin搭建后，实现HelloWorld程序完成基本入门。

注：

博客：
https://blog.csdn.net/badao_liumang_qizhi
关注公众号
霸道的程序猿
获取编程相关电子书、教程推送与免费下载。

实现

为了解决依赖问题与实现微服务的概念，下面需要新建三个Maven Project

gmall-interface 用来作为公共依赖，存放公共接口和公共Bean等。

uesr-service-provider 搭建服务提供者

order-service-consumer 搭建服务消费者

新建公共接口程序

打开Eclipse-新建maven Project

输入相关坐标信息，后面两个项目过程也是如此。

然后在项目下新建包com.badao.gmall

然后再新建bean包和service包

bean中新建UserAddress实体类

package com.badao.gmall.bean;

import java.io.Serializable;

/**
 * 用户地址
 * @author badao
 *
 */
public class UserAddress implements Serializable {
 
 private Integer id;
    private String userAddress; //用户地址
    private String userId; //用户id
    private String consignee; //收货人
    private String phoneNum; //电话号码
    private String isDefault; //是否为默认地址    Y-是     N-否
    
    public UserAddress() {
  super();
  // TODO Auto-generated constructor stub
 }
    
 public UserAddress(Integer id, String userAddress, String userId, String consignee, String phoneNum,
   String isDefault) {
  super();
  this.id = id;
  this.userAddress = userAddress;
  this.userId = userId;
  this.consignee = consignee;
  this.phoneNum = phoneNum;
  this.isDefault = isDefault;
 }
 
 public Integer getId() {
  return id;
 }
 public void setId(Integer id) {
  this.id = id;
 }
 public String getUserAddress() {
  return userAddress;
 }
 public void setUserAddress(String userAddress) {
  this.userAddress = userAddress;
 }
 public String getUserId() {
  return userId;
 }
 public void setUserId(String userId) {
  this.userId = userId;
 }
 public String getConsignee() {
  return consignee;
 }
 public void setConsignee(String consignee) {
  this.consignee = consignee;
 }
 public String getPhoneNum() {
  return phoneNum;
 }
 public void setPhoneNum(String phoneNum) {
  this.phoneNum = phoneNum;
 }
 public String getIsDefault() {
  return isDefault;
 }
 public void setIsDefault(String isDefault) {
  this.isDefault = isDefault;
 }
    
   


}

然后在service包下新建两个公共接口类

OrderService.java

package com.badao.gmall.service;

import java.util.List;

import com.badao.gmall.bean.UserAddress;

public interface OrderService {
 
 /**
  * 初始化订单
  * @param userId
  */
 public List<UserAddress> initOrder(String userId);

}

该接口声明一个初始化订单的方法。

UserService.java

package com.badao.gmall.service;

import java.util.List;

import com.badao.gmall.bean.UserAddress;

/**
 * 用户服务
 * @author badao
 *
 */
public interface UserService {
 
 /**
  * 按照用户id返回所有的收货地址
  * @param userId
  * @return
  */
 public List<UserAddress> getUserAddressList(String userId);

}

该接口提供获取所有收获地址的方法的声明

新建服务提供者程序

参照上面流程，新建user-service-provider

然后在pom.xml中引入上面公共接口的依赖

  <dependency>
   <groupId>com.badao.gmall</groupId>
   <artifactId>gmall-interface</artifactId>
   <version>0.0.1-SNAPSHOT</version>
  </dependency>

然后还要引入dubbo以及zookeeper的依赖

 <!-- 引入dubbo -->
  <!-- https://mvnrepository.com/artifact/com.alibaba/dubbo -->
  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>dubbo</artifactId>
   <version>2.6.2</version>
  </dependency>
  <!-- 注册中心使用的是zookeeper，引入操作zookeeper的客户端端 -->
  <dependency>
   <groupId>org.apache.curator</groupId>
   <artifactId>curator-framework</artifactId>
   <version>2.12.0</version>
  </dependency>

完整pom.xml代码

<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>com.badao.gmall</groupId>
  <artifactId>user-service-provider</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <dependencies>
  <dependency>
   <groupId>com.badao.gmall</groupId>
   <artifactId>gmall-interface</artifactId>
   <version>0.0.1-SNAPSHOT</version>
  </dependency>
  <!-- 引入dubbo -->
  <!-- https://mvnrepository.com/artifact/com.alibaba/dubbo -->
  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>dubbo</artifactId>
   <version>2.6.2</version>
  </dependency>
  <!-- 注册中心使用的是zookeeper，引入操作zookeeper的客户端端 -->
  <dependency>
   <groupId>org.apache.curator</groupId>
   <artifactId>curator-framework</artifactId>
   <version>2.12.0</version>
  </dependency>
 </dependencies>
</project>

在项目下新建service.impl包，包下新建实现类

package com.badao.gmall.service.impl;

import java.util.Arrays;
import java.util.List;

import com.badao.gmall.bean.UserAddress;
import com.badao.gmall.service.UserService;

 

public class UserServiceImpl implements UserService {

 public List<UserAddress> getUserAddressList(String userId) {
  
  // TODO Auto-generated method stub
  UserAddress address1 = new UserAddress(1, "霸道流氓气质", "1", "李老师", "123456789", "Y");
  UserAddress address2 = new UserAddress(2, "公众号：霸道的程序猿）", "1", "王老师", "987654321", "N");
  return Arrays.asList(address1,address2);
 }

}

然后按照其官方指示，新建配置文件并配置服务提供者

在src/main/resource下新建配置文件provider.xml

按照其官方要求，编写配置文件如下

<?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://code.alibabatech.com/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
  http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

 <!-- 1、指定当前服务/应用的名字（同样的服务名字相同，不要和别的服务同名） -->
 <dubbo:application name="user-service-provider"></dubbo:application>
 
 <!-- 2、指定注册中心的位置 两种方式 -->
 <!-- <dubbo:registry address="zookeeper://127.0.0.1:2181"></dubbo:registry> -->
 <dubbo:registry protocol="zookeeper" address="127.0.0.1:2181"></dubbo:registry>
 
 <!-- 3、指定通信规则（通信协议？通信端口） -->
 <dubbo:protocol name="dubbo" port="20882"></dubbo:protocol>
 
 <!-- 4、暴露服务   ref：指向服务的真正的实现对象 -->
 <dubbo:service interface="com.badao.gmall.service.UserService" 
  ref="userServiceImpl" timeout="1000" version="1.0.0">
  <dubbo:method name="getUserAddressList" timeout="1000"></dubbo:method>
 </dubbo:service>
 
 <!--统一设置服务提供方的规则  -->
 <dubbo:provider timeout="1000"></dubbo:provider>
 
 <bean id="userServiceImpl" class="com.badao.gmall.service.impl.UserServiceImpl"></bean>
 
</beans>

然后在com.badao.gmall包下新建MainApplication.java

读取配置文件并暴露服务。

package com.badao.gmall;

import java.io.IOException;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MainApplication {
 
 public static void main(String[] args) throws IOException {
  ClassPathXmlApplicationContext ioc = new ClassPathXmlApplicationContext("provider.xml");
  ioc.start();
  System.in.read();
 }

}

搭建服务消费者程序

参照上面流程新建order-service-consumer服务消费者程序

在pom.xml中添加公共接口依赖以及dubbo和zookeeper相关依赖

<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>
  <groupId>com.badao.gmall</groupId>
  <artifactId>user-service-provider</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <dependencies>
  <dependency>
   <groupId>com.badao.gmall</groupId>
   <artifactId>gmall-interface</artifactId>
   <version>0.0.1-SNAPSHOT</version>
  </dependency>
  <!-- 引入dubbo -->
  <!-- https://mvnrepository.com/artifact/com.alibaba/dubbo -->
  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>dubbo</artifactId>
   <version>2.6.2</version>
  </dependency>
  <!-- 注册中心使用的是zookeeper，引入操作zookeeper的客户端端 -->
  <dependency>
   <groupId>org.apache.curator</groupId>
   <artifactId>curator-framework</artifactId>
   <version>2.12.0</version>
  </dependency>
 </dependencies>
</project>

然后新建接口实现类OrderServiceImpl

package com.badao.gmall.service.impl;

import java.util.List;

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

import com.badao.gmall.bean.UserAddress;
import com.badao.gmall.service.OrderService;
import com.badao.gmall.service.UserService;

/**
 * 1、将服务提供者注册到注册中心（暴露服务）
 *   1）、导入dubbo依赖（2.6.2）\操作zookeeper的客户端(curator)
 *   2）、配置服务提供者
 * 
 * 2、让服务消费者去注册中心订阅服务提供者的服务地址
 * @author badao
 *
 */
@Service
public class OrderServiceImpl implements OrderService {

 @Autowired
 UserService userService;
 public List<UserAddress> initOrder(String userId) {
  // TODO Auto-generated method stub
  System.out.println("用户id："+userId);
  //1、查询用户的收货地址
  List<UserAddress> addressList = userService.getUserAddressList(userId);
  for (UserAddress userAddress : addressList) {
   System.out.println(userAddress.getUserAddress());
  }
  return addressList;
 }
 
 

}

按照官方指示，同样新建服务消费者配置文件consumer.xml

<?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"
 xmlns:context="http://www.springframework.org/schema/context"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
  http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
  http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd
  http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
 <context:component-scan base-package="com.badao.gmall.service.impl"></context:component-scan>


 <dubbo:application name="order-service-consumer"></dubbo:application>
 
 <dubbo:registry address="zookeeper://127.0.0.1:2181"></dubbo:registry>
 
 
 
 <!--声明需要调用的远程服务的接口；生成远程服务代理  -->
 <!-- 
  1）、精确优先 (方法级优先，接口级次之，全局配置再次之)
  2）、消费者设置优先(如果级别一样，则消费方优先，提供方次之)
 -->
 <dubbo:reference interface="com.badao.gmall.service.UserService" 
  id="userService" timeout="5000" retries="3" version="*">
 </dubbo:reference>
  
</beans>

然后新建MainApplication，加载Spring配置，并调用远程服务

package com.badao.gmall;

import java.io.IOException;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.badao.gmall.service.OrderService;

public class MainApplication {
 
 @SuppressWarnings("resource")
 public static void main(String[] args) throws IOException {
  ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("consumer.xml");
  OrderService orderService = applicationContext.getBean(OrderService.class);
  orderService.initOrder("1");
  System.out.println("调用完成....");
  System.in.read();
 }

}