dubbox 入门Demo

时间  2019-11-08
标签 dubbox 入门 demo 繁體版
原文   原文链接

Ⅰ.准备工做

  • 准备lnux安装包

  • zookeeper安装包java

  • 安装zookeepergit

    1. tar -zxvf zookeeper-3.4.10
    2. 配置zk的环境变量

    3. 启动单机版zookeepergithub

      * zkServer.sh start
  * 查看zk的状态 zkServer.sh status

Ⅱ.编写服务提供方

建立Maven项目web

  • 建立web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://java.sun.com/xml/ns/javaee"
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
        version="2.5">    
        
        <!-- 加载spring容器 -->
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext*.xml</param-value>
        </context-param>
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        </web-app>

  • 导入maven依赖spring

<properties>
            <spring.version>4.2.4.RELEASE</spring.version>
        </properties>
    
        <dependencies>
            <!-- Spring -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jms</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context-support</artifactId>
                <version>${spring.version}</version>
            </dependency>
    
            <!-- dubbo相关 -->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>dubbo</artifactId>
                <version>2.8.4</version>
            </dependency>
            <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>
    
            <dependency>
                <groupId>javassist</groupId>
                <artifactId>javassist</artifactId>
                <version>3.11.0.GA</version>
            </dependency>
    
        </dependencies>
        <build>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>2.3.2</version>
                    <configuration>
                        <source>1.7</source>
                        <target>1.7</target>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.apache.tomcat.maven</groupId>
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <configuration>
                        <!-- 指定端口 -->
                        <port>8081</port>
                        <!-- 请求路径 -->
                        <path>/</path>
                    </configuration>
                </plugin>
            </plugins>
        </build>
  • 编写接口类
package cn.itcast.dubbox.service;
        
        public interface UserService {
            
            public String getName();
        
        }
  • 编写实现类
package cn.itcast.dubbox.service.impl;

        import com.alibaba.dubbo.config.annotation.Service;
        
        import cn.itcast.dubbox.service.UserService;
        
        //dubbo的service注解  用于向zookeeper注册服务
        
        @Service
        public class UserServiceImpl implements UserService {
        
            public String getName() {
                return "itcast";
            }
        }
  • 编写spring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:p="http://www.springframework.org/schema/p"
            xmlns:context="http://www.springframework.org/schema/context"
            xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns:mvc="http://www.springframework.org/schema/mvc"
            xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
                http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
                http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
        
            //项目名，填写本身的项目名  个人项目名称叫作 dubbox-service
            <dubbo:application name="dubbox-service" />
            //这里填写zk的IP以及对应的端口号
            <dubbo:registry address="zookeeper://192.168.133.121:2181" />
            //dubbox 的包扫描
            <dubbo:annotation package="cn.itcast.dubbox.service" />
        </beans>

Ⅲ.编写服务消费方

  • 建立maven项目
  • 建立web.xml文件
<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>cn.itcast.dubbox.web</groupId>
  <artifactId>dubbox-web</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <description>服务消费</description>
  
  <properties>
        <spring.version>4.2.4.RELEASE</spring.version>
    </properties>

    <dependencies>
        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jms</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- dubbo相关 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.8.4</version>
        </dependency>
        <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>

        <dependency>
            <groupId>javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.11.0.GA</version>
        </dependency>

    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <configuration>
                    <!-- 指定端口 -->
                    <port>8082</port>
                    <!-- 请求路径 -->
                    <path>/</path>
                </configuration>
            </plugin>
        </plugins>
        </build>
        </project>
  • 复制上面的接口
  • 编写controller
package cn.itcast.dubbox.controller;

    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.alibaba.dubbo.config.annotation.Reference;
    
    import cn.itcast.dubbox.service.UserService;
    
    @RestController
    public class indexController {
        
        @Reference
        UserService userService;
        
        @RequestMapping("/getName")
        public String getName(){
            return userService.getName();
        }
    
    }
  • 编写springmvc.xml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:p="http://www.springframework.org/schema/p"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns:mvc="http://www.springframework.org/schema/mvc"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
            http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
        <mvc:annotation-driven>
            <mvc:message-converters register-defaults="false">
                <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                    <constructor-arg value="UTF-8" />
                </bean>
            </mvc:message-converters>
        </mvc:annotation-driven>
    
        <!-- 引用dubbo 服务 -->
        <dubbo:application name="dubbox-web" />
        <dubbo:registry address="zookeeper://192.168.133.121:2181" />
        <dubbo:annotation package="cn.itcast.dubbox.controller" />
        </beans>

Ⅳ启动

  • 启动zk
  • 启动service
  • 启动web
  • 访问 localhost:8082/getName

示例Demo

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