4、dubbo+zookeeper的helloWorld测试

需求：

打开IDEA，创建一个空工程

在该项目中新建模块，创建一个简单的maven工程（服务接口模块）

编写接口和bean

UserAddress.java

/**
 * 用户地址
 * @author lfy
 *
 */
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
    ......
}

OrderService.java

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

}

UserService.java

/**
 * 用户服务
 * @author lfy
 *
 */
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);

}

pom.xml

<?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>

    <groupId>com.atguigu.gmall</groupId>
    <artifactId>gmall-interface</artifactId>
    <version>1.0-SNAPSHOT</version>


</project>

再新建模块，创建一个简单的maven工程（服务提供者）

在该模块中配置pom.xml文件、UserService接口的实现类UserServiceImpl、spring主配置文件、主程序类，路径如如图

pom.xml

<?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>

    <groupId>com.atguigu.gmall</groupId>
    <artifactId>user-service-provider</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <!--引入需要远程调用方法的接口和bean-->
        <dependency>
            <groupId>com.atguigu.gmall</groupId>
            <artifactId>gmall-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!--引入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
            dubbo2.6以前的版本引入zkclient操作zookeeper
            dubbo2.6之后的版本引入curator操作zookeeper-->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>2.12.0</version>
        </dependency>
    </dependencies>

    <build>
        <resources>
            <!--IDEA默认不把xml等其它文件加入到target目录下-->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.tld</include>
                    <include>**/*.xls</include>
                    <include>**/*.xlsx</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.tld</include>
                    <include>**/*.xls</include>
                    <include>**/*.xlsx</include>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>
</project>

UserServiceImpl.java

public class UserServiceImpl implements UserService {

    @Override
    public List<UserAddress> getUserAddressList(String userId) {
        //这里只是为了测试dubbo，所以就不连接数据库了
        UserAddress address1 = new UserAddress(1, "北京市昌平区宏福科技园综合楼3层", "1", "李老师", "010-56253825", "Y");
        UserAddress address2 = new UserAddress(2, "深圳市宝安区西部硅谷大厦B座3层（深圳分校）", "1", "王老师", "010-56253825", "N");

        return Arrays.asList(address1,address2);
    }

}

provider.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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">

    <!--1、指定服务/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-->
    <dubbo:registry address="zookeeper://127.0.0.1:2181"></dubbo:registry>
    <!--或者是用下面的这种方式指定注册中心-->
    <!--<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="20080"></dubbo:protocol>

    <!--4、暴露服务  ref：指向服务的真正的实现对象-->
    <dubbo:service interface="com.atguigu.gmall.service.UserService" ref="userServiceImpl"></dubbo:service>

    <!--服务的实现-->
    <bean name="userServiceImpl" class="com.atguigu.gmall.service.impl.UserServiceImpl"></bean>
</beans>

MainApplication.java

public class MainApplication {
    public static void main(String[] args) throws IOException {
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:provider.xml");
        applicationContext.start();
        //为了该程序不终止，在这写一个读取方法使阻塞，监控中心就能看到服务提供者是开启状态
        System.in.read();
    }
}

运行主程序之前确保zookeeper服务端是运行状态

运行主程序，运行状态期间，配置的服务会注册到zookeeper中

想要看到我们注册的服务此时就要用到监控中心了

开启监控中心服务

进入网页的监控中心可以看到有一个服务

如下图点击可以查看提供者的信息

再创建一个模块，也是建一个简单的maven工程（服务消费者）

在该模块中配置pom.xml文件、OrderService接口的实现类OrderServiceImpl.java、spring主配置文件、主程序类，路径如如图

pom.xml文件

<?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>

    <groupId>com.atguigu.gmall</groupId>
    <artifactId>order-service-consumer</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>com.atguigu.gmall</groupId>
            <artifactId>gmall-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!--引入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
            dubbo2.6以前的版本引入zkclient操作zookeeper
            dubbo2.6之后的版本引入curator操作zookeeper-->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>2.12.0</version>
        </dependency>
    </dependencies>


    <build>
        <resources>
            <!--IDEA默认不把xml等其它文件加入到target目录下-->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.tld</include>
                    <include>**/*.xls</include>
                    <include>**/*.xlsx</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.tld</include>
                    <include>**/*.xls</include>
                    <include>**/*.xlsx</include>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>
</project>

OrderServiceImpl.java

/**
 * 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
 *
 */
@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    UserService userService;
    @Override
    public List<UserAddress> initOrder(String userId) {
        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;
    }
    
}

consumer.xml（spring主配置类）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    <!--spring的注解包扫描配置-->
    <context:component-scan base-package="com.atguigu.gmall.service"></context:component-scan>

    <!--1、指定服务/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="order-service-consumer"/>

    <!--2、指定注册中心的位置-->
    <dubbo:registry address="zookeeper://127.0.0.1:2181"></dubbo:registry>

    <!--3、声明需要调用远程服务的接口；生成远程服务代理-->
    <dubbo:reference id="userService" interface="com.atguigu.gmall.service.UserService"/>

</beans>

MainApplication.java（主程序类）

public class MainApplication {
    public static void main(String[] args) throws IOException {
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("consumer.xml");
        //通过接口获取实现类
        OrderService orderService = applicationContext.getBean(OrderService.class);
        //远程调用
        orderService.initOrder("1");

        System.out.println("调用完成");
        //为了该程序不终止，在这写一个读取方法使阻塞，监控中心就能看到服务消费者是开启状态
        System.in.read();
    }
}