Dubbo之HelloWorld

最新推荐文章于 2022-08-08 00:37:38 发布

王学政

最新推荐文章于 2022-08-08 00:37:38 发布

阅读量540

点赞数

分类专栏： Dubbo 文章标签： dubbo

本文链接：https://blog.youkuaiyun.com/w_x_z_/article/details/52743857

版权

Dubbo 专栏收录该内容

1 篇文章

订阅专栏

这篇博客介绍了Dubbo的基础使用，包括生产者和消费者的项目结构。生产者项目包含User.java实体类、UserService接口及其实现类UserServiceImpl，以及相关的配置文件。消费者项目依赖生产者的实体类和接口，通过UserAccess类调用UserService服务。详细配置和依赖可在相关链接中查看。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

生产者的项目结构：

这里写图片描述

消费者的项目结构：

这里写图片描述

生产者项目的具体内容：

pom.xml依赖的jar

        <!-- dubbo -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- zkclient -->
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.5</version>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- zookeeper -->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.6</version>
        </dependency>

注:依赖的Spring的jar略…详见：http://blog.youkuaiyun.com/w_x_z_/article/details/52705153

User.java

public class User implements Serializable{

    private static final long serialVersionUID = 1L;

    private String id;

    private String userName;

    private Integer age;

    // setter和getter
    //..
}

UserService.java 接口

public interface UserService {

    String saveUser(User user);

    List<User> findAll();
}

UserServiceImpl.java 实现类

@Service("userService")
public class UserServiceImpl implements UserService {

    public static List<User> userList = new ArrayList<User>();

    @Override
    public String saveUser(User user) {
        userList.add(user);
        return user.getId();
    }

    @Override
    public List<User> findAll() {
        return userList;
    }
}

Main.java

public class Main {

    public static void main(String[] args) throws IOException {

        ApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");

        System.out.println("服务端:服务启动...");
        System.in.read();
    }
}

spring.xml 配置文件

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

    <!-- 引入配置文件 -->
    <import resource="classpath:spring-*.xml"/>

    <!-- 加载config.properties配置文件 -->
    <context:property-placeholder ignore-unresolvable="true" location="classpath:config.properties" />

    <bean id="userService" class="com.netant.service.impl.UserServiceImpl" />
</beans>

spring-dubbo.xml 配置文件

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

    <!-- 提供方应用信息，用于计算依赖关系 -->
    <dubbo:application name="Dubbo_HelloWorld"  />

    <!-- 注册中心暴露服务地址 -->
    <dubbo:registry protocol="zookeeper" address="${zookeeper.connect}"/>

    <!-- 用dubbo协议在20880端口暴露服务 -->
    <dubbo:protocol name="dubbo" port="20880" />

    <!-- 声明需要暴露的服务接口 -->
    <dubbo:service interface="com.netant.service.UserService" ref="userService" protocol="dubbo" timeout="5000000"/>

</beans>

消费者项目的具体内容：

需要依赖生产者提供的实体类User.java和UserService接口

UserAccess.java

通过此类调用UserService提供的服务

@Component
public class UserAccess {

    @Autowired
    private UserService userService;

    public String saveUser(String id ,String userName ,Integer age){
        User user = new User();
        user.setId(id);
        user.setUserName(userName);
        user.setAge(age);
        return userService.saveUser(user);
    }

    public List<User> findAllUser(){
        return userService.findAll();
    }

}

Main.java

public class Main {

    public static void main(String[] args) throws IOException {

        ApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");

        UserAccess userAccess = ctx.getBean(UserAccess.class);

//      String userId = userAccess.saveUser("456", "Jack1", 20);
//      
//      System.out.println("保存用户成功之后返回的userId：" + userId);

        List<User> userList = userAccess.findAllUser();

        for (User user : userList) {
            System.out.println("遍历获取的所有用户信息:" + user.getId() + " " + user.getUserName());
        }
    }

}

spring.xml 配置文件

<?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.xsd    
                        http://code.alibabatech.com/schema/dubbo        
                        http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    <!-- 扫描注解注入 -->
    <context:component-scan base-package="com.netant" />

    <!-- 引入配置文件 -->
    <import resource="classpath:spring-*.xml"/>

    <!-- 加载config.properties配置文件 -->
    <context:property-placeholder ignore-unresolvable="true" location="classpath:config.properties" />

    <bean id="userAccess" class="com.netant.UserAccess" />
</beans>

spring-dubbo.xml 配置文件

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

    <!-- 提供方应用信息，用于计算依赖关系 -->
    <dubbo:application name="Dubbo_HelloWorld_Ref"  />

    <!-- 注册中心暴露服务地址 -->
    <dubbo:registry protocol="zookeeper" address="${zookeeper.connect}"/>

    <!-- 用dubbo协议在20880端口暴露服务 -->
    <dubbo:protocol name="dubbo" port="20881" />

   <!-- 生成远程服务代理，可以和本地bean一样使用userService -->
    <dubbo:reference id="userService" interface="com.netant.service.UserService" protocol="dubbo" check="false" retries="0"/>

</beans>