使用IDEA搭建Dubbo入門小Demo
阿新 • • 發佈：2019-02-17
一、使用IDEA建立Maven工程
建立好工程之後，可以把src目錄刪除。此工程將作為聚合工程。
二、建立服務提供者模組dubbo-service
建立之後，首先在pom.xml檔案中修改其打包方式為war
接著完善目錄結構，新增web.xml檔案，如下：
在web.xml中配置sping核心配置檔案，及監聽器，載入spring容器
<context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:/spring/applicationContext*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>
然後在resources目錄下新增spring核心配置檔案
<?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="service"/> <dubbo:registry address="zookeeper://192.168.244.128:2181"/> <dubbo:annotation package="com.xiao.service.impl" /> </beans>
最後還需要在pom.xml中新增相關依賴，如下
<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相關 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.3</version> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.12</version> </dependency> <dependency> <groupId>com.github.sgroschupf</groupId> <artifactId>zkclient</artifactId> <version>0.1</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.2</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <configuration> <!-- 指定埠 --> <port>8080</port> <!-- 請求路徑 --> <path>/</path> </configuration> </plugin> </plugins> </build>
到此我們服務的提供方的工程已經建立好了，接下來去建立提供的服務的介面及其實現類，如下：
package com.xiao.service;
/**
* @Description 服務提供方 介面
* @Auther: 笑笑
* @Date: 15:18 2018/9/14
*/
public interface DemoService {
public String hello();
}
package com.xiao.service.impl;
import com.alibaba.dubbo.config.annotation.Service;
import com.xiao.service.DemoService;
/**
* @Description 服務提供方介面 實現類
* @Auther: 笑笑
* @Date: 15:19 2018/9/14
*/
@Service
public class DemoServiceImpl implements DemoService {
@Override
public String hello() {
return "Hello Dubbo!";
}
}
在這裡要注意一下，@Service註解一定要使用dubbo的註解。
三、建立服務消費者dubbo-controller模組
建立工程的具體過程與上面的一樣，在此不再重複書寫。
最終目錄結構如下
在這裡要注意一下，需要把提供者的服務介面拷貝過來！（只需要介面就可以了！）還有pom.xml中配置的埠號要區分一下，我這裡改為了8081，其餘的依賴相同。
web.xml如下
<?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">
<!-- 解決post亂碼 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 指定載入的配置檔案 ，通過引數contextConfigLocation載入-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/spring/springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
</web-app>springmvc.xml如下
<?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" 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">
<!-- 處理json亂碼 -->
<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 服務 -->
<dubbo:application name="controller" />
<dubbo:registry address="zookeeper://192.168.244.128:2181"/>
<dubbo:annotation package="com.xiao.controller" />
</beans>DemoController如下
package com.xiao.controller;
import com.alibaba.dubbo.config.annotation.Reference;
import com.xiao.service.DemoService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
/**
* @Description 服務消費方
* @Auther: 笑笑
* @Date: 15:35 2018/9/14
*/
@Controller
public class DemoController {
@Reference
private DemoService service;
@RequestMapping(value = "/dubbo/demo")
@ResponseBody
public String hello(){
return service.hello();
}
}
四、啟動工程，測試
我們以tomcat外掛的方式啟動工程（這個的配置自行百度吧。。我懶了）
