需求：
某个电商系统，订单服务需要调用用户服务获取某个用户的所有地址；
我们现在需要创建两个服务模块进行测试
| 模块 | 功能 |
| 订单服务web模块 | 创建订单等 |
| 用户服务service模块 | 查询用户地址等 |
测试预期结果：
订单服务web模块在A服务器，用户服务模块在B服务器，A可以远程调用B的功能。
以下使用XML 配置的方式，更多配置方式见官方文档
公共接口层（model，service，exception…），定义公共接口，也可以导入公共依赖
UserAddress.java：用户地址实体类
public class UserAddress implements Serializable {
private Integer id;
private String userAddress;
private String userId;
private String consignee;
private String phoneNum;
private String isDefault;
....
}
IOrderService.java：订单接口
public interface IOrderService {
/**
* 用户下单
* @param userId
*/
UserAddress placeOrder(int userId);
}
IUserService.java：用户接口
public interface IUserService {
/**
* 根据用户id获取用户地址
* @param userId
* @return
*/
UserAddress getUserAddById(int userId);
}
pom.xml：通用的依赖，引入dubbo和zkclient
<?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>dubboStudy</artifactId>
<groupId>org.example</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-common</artifactId>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<!--dubbo -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.10</version>
</dependency>
<!--zookeeper -->
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.6</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
</dependencies>
</project>
用户业务，作为服务提供者
pom.xml：引入通用模块，可以使用定义的接口
<dependency> <groupId>org.example</groupId> <artifactId>spring-common</artifactId> <version>1.0-SNAPSHOT</version> </dependency>
UserServiceImpl.xml：IUserService的实现类，供远程调用
public class UserServiceImpl implements IUserService {
@Override
public UserAddress getUserAddById(int userId) {
UserAddress userAddress = new UserAddress();
userAddress.setUserAddress("上海市宝山区");
return userAddress;
}
}
provider.xml：dubbo配置信息
<?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="spring-user"/>
<!--2、指定注册中心的位置-->
<!--<dubbo:registry protocol="zookeeper" address="127.0.0.1:2181"></dubbo:registry>-->
<dubbo:registry address="zookeeper://192.168.31.136:2181"/>
<!--3、指定通信规则（通信协议? 服务端口）-->
<dubbo:protocol name="dubbo" port="20880"/>
<!--4、暴露服务 让别人调用 ref指向服务的真正实现对象-->
<bean id="userServiceImpl" class="me.nic.service.impl.UserServiceImpl"/>
<!--服务的实现-->
<dubbo:service interface="me.nic.service.IUserService" ref="userServiceImpl"/>
</beans>
ConsumerRun.java：启动：
public class ConsumerRun {
public static void main(String[] args) throws IOException {
ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("consumer.xml");
IOrderService orderService = applicationContext.getBean(IOrderService.class);
orderService.placeOrder(1);
System.in.read();
}
}
订单业务，作为服务消费者
pom.xml：引入通用模块，可以使用定义的接口，同1.2
OrderServiceImpl.xml：IOrderService的实现类，其中远程调用userService
@Service
public class OrderServiceImpl implements IOrderService {
@Autowired
private IUserService userService;
@Override
public UserAddress placeOrder(int userId) {
// 远程调用，获取用户地址
UserAddress userAddById = userService.getUserAddById(userId);
// 下单
System.out.println("用户地址：" + userAddById.getUserAddress());
System.out.println("下单成功");
return null;
}
}
consumer.xml：dubbo配置信息
<?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:context="http://www.springframework.org/schema/context"
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://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">
<!--包扫描-->
<context:component-scan base-package="me.nic.service.impl"/>
<!--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="spring-order"/>
<!--指定注册中心的位置-->
<dubbo:registry address="zookeeper://192.168.31.136:2181"/>
<!--调用远程暴露的服务，生成远程服务代理-->
<dubbo:reference id="userService" interface="me.nic.service.IUserService"/>
</beans>
ProviderRun.java：启动
public class ProviderRun {
public static void main(String[] args) throws IOException {
ClassPathXmlApplicationContext context =
new ClassPathXmlApplicationContext("classpath:provider.xml");
System.in.read();
}
}
ProviderRun启动之后阻塞，
ConsumerRun启动之后调用orderService.placeOrder(1)，placeOrder中远程调用spring-user模块中的userService.getUserAddById(userId)获取用户地址：
用户地址：上海市宝山区 下单成功
公共接口层（model，service，exception…），定义公共接口，也可以导入公共依赖
UserAddress.java：用户地址实体类
public class UserAddress implements Serializable {
private Integer id;
private String userAddress;
private String userId;
private String consignee;
private String phoneNum;
private String isDefault;
....
}
IOrderService.java：订单接口
public interface IOrderService {
/**
* 用户下单
* @param userId
*/
UserAddress placeOrder(int userId);
}
IUserService.java：用户接口
public interface IUserService {
/**
* 根据用户id获取用户地址
* @param userId
* @return
*/
UserAddress getUserAddById(int userId);
}
pom.xml：通用的依赖，引入dubbo的starter
<?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>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.0</version>
<relativePath/>
</parent>
<groupId>com.example</groupId>
<artifactId>boot-common</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>boot-common</name>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>0.2.0</version>
</dependency>
</dependencies>
</project>
用户业务，作为服务提供者
pom.xml：引入通用模块，可以使用定义的接口
<dependency> <groupId>org.example</groupId> <artifactId>spring-common</artifactId> <version>1.0-SNAPSHOT</version> </dependency>
UserServiceImpl.xml：IUserService的实现类，供远程调用
@Service 暴露dubbo的服务
@Service
@Component
public class UserServiceImpl implements IUserService {
@Override
public UserAddress getUserAddById(int userId) {
UserAddress userAddress = new UserAddress();
userAddress.setUserAddress("上海市宝山区");
return userAddress;
}
}
application.properties：dubbo配置信息
dubbo.application.name=boot-user dubbo.registry.address=192.168.31.136:2181 dubbo.registry.protocol=zookeeper dubbo.protocol.name=dubbo dubbo.protocol.port=20880
BootUserApplication.java：启动：
@EnableDubbo : 开启基于注解的dubbo功能
@EnableDubbo
@SpringBootApplication
public class BootUserApplication {
public static void main(String[] args) {
SpringApplication.run(BootUserApplication.class, args);
}
}
订单业务，作为服务消费者
pom.xml：引入通用模块，可以使用定义的接口，同1.2
<dependency> <groupId>com.example</groupId> <artifactId>boot-common</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency>
OrderServiceImpl.xml：IOrderService的实现类，其中远程调用userService
@Reference：引用远程提供者服务
@Service
public class OrderServiceImpl implements IOrderService {
//引用远程提供者服务
@Reference
private IUserService userService;
@Override
public UserAddress placeOrder(int userId) {
// 远程调用，获取用户地址
UserAddress userAddById = userService.getUserAddById(userId);
return userAddById;
}
}
OrderController.java：web接口，调用OrderService：
@Controller
public class OrderController {
@Autowired
IOrderService orderService;
@RequestMapping("/initOrder")
@ResponseBody
public UserAddress initOrder(@RequestParam("uid")int userId) {
return orderService.placeOrder(userId);
}
}
application.properties：dubbo配置信息
server.port=8081 dubbo.application.name=boot-order dubbo.registry.address=zookeeper://192.168.31.136:2181
BootOrderApplication.java：启动
@EnableDubbo
@SpringBootApplication
public class BootOrderApplication {
public static void main(String[] args) {
SpringApplication.run(BootOrderApplication.class, args);
}
}
