搭建一个简单的dubbo项目

清疚 2022-05-23 09:25 231阅读 0赞

# 1.创建maven项目并导入相关依赖 #

<dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>dubbo</artifactId>
        <version>2.5.7</version>
    </dependency>
    <dependency>
        <groupId>com.github.sgroschupf</groupId>
        <artifactId>zkclient</artifactId>
        <version>0.1</version>
    </dependency>

# 2.创建一个服务项目 #

##    1.创建类和接口 ##

接口：

public interface GreetingsService {
          String sayHi(String name);
        }

实现类：

public class GreetingsServiceImpl implements GreetingsService {
    
          public String sayHi(String name) {
            return "hi,"+name;
          }
        }

##     2.在xml文件中配置注册服务信息 ##

<?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://code.alibabatech.com/schema/dubbo  
       http://code.alibabatech.com/schema/dubbo/dubbo.xsd">  
  
    <dubbo:application name="demo-provider" version="1.0"/>  
      
    <dubbo:registry address="zookeeper://127.0.0.1:2183"/>  
      
    <dubbo:protocol  name="dubbo" port="20880"/>  
      
    <bean id="greetingsService" class="com.ns.interfact.impl.GreetingsServiceImpl"/>  
      
    <dubbo:service interface="com.ns.interfact.GreetingsService" ref="greetingsService"/>

</beans>

## 3.启动服务 ##

public static void main(String\[\] args)\{  
//读取xml配置文件  
ClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext("applicationProvider.xml");  
context.start();  
System.out.println("服务启动");  
try\{  
//使服务一直处于运行状态  
System.in.read();  
\}catch(Exception e)\{  
e.printStackTrace();  
\}

# 3.创建一个消费端 #

##    1.创建要调用的接口 ##

public interface DemoService \{  
String sayHello(String name);

##   2.配置服务端的配置文件 ##

<?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: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://code.alibabatech.com/schema/dubbo  
       http://code.alibabatech.com/schema/dubbo/dubbo.xsd">  
  
    <dubbo:application name="demo-customer" version="1.0"/>  
      
    <dubbo:registry address="zookeeper://127.0.0.1:2183"/>  
      
    <dubbo:reference interface="com.ns.interfact.GreetingsService" id="greetingsService" check="false"/>

</beans>

##   3.调用服务 ##

public static void main(String\[\] args)\{  
//读取xml配置文件  
ClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext("applicationProvider.xml");  
context.start();  
GreetingsService greetingsService=context.getBean(GreetingsService.class);  
System.out.println(greetingsService.sayHi("王霞"));

# 4.安装配置并启动zookeeper #

1.从网站上下载zookeeper的压缩包https://jingyan.baidu.com/article/335530dafd4b3619cb41c3d8.html

2.解压下载的zookeeper的压缩包

![70][]

3.修改配置文件

![70 1][]

4.通过zkServer.cmd启动Zookeeper的服务器

5.通过zkCli.cmd启动Zookeeper的客户端,查看已经注册的服务

![70 2][]

5.出现的错误

1.dubbo的标签找不到

错误原因： 找不到dubbo.xsd文件，可能是因为网络原因，判断方法：点击xml文件的资源链接，看是否能够打开.

解决办法:  将本地的xsd文件导入

![70 3][]

2.zookeeper服务启动失败

错误原因：zookeeper的配置文件从出错

判断方式：用cmd运行zkServer.cmd的文件查看出错原因

![20180606171823639][]

[70]: /images/20220523/217ad20c156048f1b04c575d2d83ebb8.png
[70 1]: /images/20220523/2f0cd863aef84cba90e21710cae3feda.png
[70 2]: /images/20220523/2d047ff120544facb967f6aee7a7e900.png
[70 3]: /images/20220523/ac170f7996ca4ef7accf73d53552c31d.png
[20180606171823639]: /images/20220523/f12fd7030f9848f3af472af3559c4853.png