新建3个maven项目
1,test-dubbo-provider ,java项目,作为提供者,serviceImpl 和dao 层
2,test-public-interface,java项目,存放公共的接口,servicei是service的接口(备注:1要依赖2,3也要依赖2)
3,test-web-consumer,web项目,存放 Controller 和 页面
首先我们来开发服务的提供者也就是 test-dubbo-provider ,目录结构为:
ApplicationContent-dubbo.xml
ApplicationContent.xml
MATE-INF/spring/下面 (原因后面再说)
UserServiceImpl.java 接口的实现类
package com.cl.user.serviceImpl;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import com.cl.user.servicei.UserService;
@Service("userService")
@Component
public class UserServiceImpl implements UserService{
public String sayHello(String id) {
System.out.println("hello world----------------------------");
StringBuffer sb=new StringBuffer();;
for (int i = 0; i < 10; i++) {
sb=sb.append("hello world-->"+i+"===="+id+"\n");
}
return sb.toString();
}
public String test(int a,int b) {
return (a+b)+"";
}
public String test2() {
String str="hello dubbo";
return str;
}
}
有了实现类,还需要接口,也就是项目test-public-interface
这个项目很简单 只需要 接口 就行了
package com.cl.user.servicei;
public interface UserService {
public String sayHello(String id);
public String test(int a,int b);
public String test2();
}
当然 项目 1 要 依赖 项目 2
所以在1 的 pom.xml 中 有
<dependency>
<groupId>test-web</groupId>
<artifactId>test-pubilc-interface</artifactId>
<version>0.0.1-SNAPSHOT</version>
<scope>test</scope>
</dependency>
这样 1 中的 UserServiceImpl 就可以实现 UserService接口
当然我们用到 dubbo,就要有dubbo的核心jar包和zookeeper的jar包,所以在1 的 pom.xml 中有
<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>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.3.3</version>
</dependency>
下面介绍一下项目1 中 的
ApplicationContent-dubbo.xml
和
ApplicationContent.xml
ApplicationContent.xml
主要是spring的配置不多说
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 启用注解 -->
<context:annotation-config/>
<!-- 启动组件扫描,排除@Controller组件,该组件由SpringMVC配置文件扫描 -->
<context:component-scan base-package="com.cl.user.serviceImpl"/>
<bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<!-- value>/WEB-INF/classes/dbconfig.properties</value-->
<value>dbconfig.properties</value>
</list>
</property>
</bean>
<!-- 阿里 druid数据库连接池 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<!-- 数据库基本信息配置 -->
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<property name="driverClassName" value="${driverClassName}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="${jdbc.initialSize}"></property>
<!-- 连接池最大数量 -->
<property name="maxActive" value="${jdbc.maxActive}"></property>
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="${jdbc.maxIdle}"></property>
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${jdbc.minIdle}"></property>
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${jdbc.maxWait}"></property>
</bean>
<!-- 配置mybatis -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:mybatis/mybatis-config.xml"></property>
<!-- mapper扫描 -->
<property name="mapperLocations" value="classpath:mybatis/*/*.xml"></property>
</bean>
<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg ref="sqlSessionFactory" />
</bean>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="delete*" propagation="REQUIRED" read-only="false"
rollback-for="Exception"/>
<tx:method name="insert*" propagation="REQUIRED" read-only="false"
rollback-for="Exception" />
<tx:method name="update*" propagation="REQUIRED" read-only="false"
rollback-for="Exception" />
<tx:method name="save*" propagation="REQUIRED" read-only="false"
rollback-for="Exception" />
<tx:method name="*" rollback-for="Exception"/>
</tx:attributes>
</tx:advice>
<aop:aspectj-autoproxy proxy-target-class="true"/>
<!-- 事物处理 -->
<aop:config>
<aop:pointcut id="pc" expression="execution(* com.um.*.services..*(..))" />
<aop:advisor pointcut-ref="pc" advice-ref="txAdvice" />
</aop:config>
</beans>
ApplicationContent-dubbo.xml
dubbo服务的配置
<?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-2.5.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="hehe_provider" />
<!-- 使用zookeeper注册中心暴露服务地址 -->
<dubbo:registry address="zookeeper://172.30.9.173:2181"/>
<!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> -->
<!-- 用dubbo协议在20880端口暴露服务 -->
<dubbo:protocol name="dubbo" port="20880" />
<!-- 具体的实现bean -->
<bean id="userService" class="com.cl.user.serviceImpl.UserServiceImpl" />
<!-- 声明需要暴露的服务接口 -->
<dubbo:service interface="com.cl.user.servicei.UserService" ref="userService" />
</beans>
注意:有可能你的配置文件中不识别 <dubbo:> 解决办法(缺少dubbo.xsd,具体怎么导入到编译器,上网百度,这里不多说了)
到这里我们的 “提供者” 即 服务已经开发完了,那么如何启动服务呢? 在项目1中有个start.java
package com.test;
import org.apache.log4j.PropertyConfigurator;
public class start {
static{
PropertyConfigurator.configure("src/main/resources/log4j.properties");
}
public static void main(String[] args) {
com.alibaba.dubbo.container.Main.main(args);
}
}
注意里面有main方法,可以直接运行启动。别急! 之前还有个问题就是为什么ApplicationContent-dubbo.xml 和 ApplicationContent.xml 这两个配置文件 必须要放到/MATE-INF/spring/下面
因为 com.alibaba.dubbo.container.Main.main(args) 默认就会去加载 /MATE-INF/spring/ 下的配置文件
我们来看一下源码
看完源码 这下明白为什么了吧!!!!!!!!!!!!!!!!!
启动服务后我们在 dubbo-admin中就能看到我们刚才开发的的 “提供者”
192.168.139.127 是本地局域网地址
这是 “提供者” 此时还没有“消费者” 接下来我们就要开发 “消费者”
UserController.java
package com.cl.user.controller;
import javax.annotation.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.cl.user.servicei.UserService;
@Controller
public class UserController {
@Resource(name="userService")
private UserService userService;
@RequestMapping("/hello/test/world")
public void sayHello(){
System.out.println(userService.sayHello("hello")+"**************************");
}
}
ApplicationContext-mvc.xml 都是springmvc的配置 如下,具体不解释了
<?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:mvc="http://www.springframework.org/schema/mvc"
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://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
<context:component-scan base-package="com" />
<!-- 对静态资源文件的访问 restful-->
<mvc:resources mapping="/js/**" location="/js/" />
<mvc:resources mapping="/lib/**" location="/lib/" />
<mvc:resources mapping="/plugins/**" location="/plugins/" />
<mvc:resources mapping="/uploadFiles/**" location="/uploadFiles/" />
<mvc:resources mapping="/WEB-INF/html/**" location="/WEB-INF/html/" />
<!-- 配置SpringMVC的视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/html"/>
<property name="suffix" value=".jsp"/>
</bean>
<!-- 上传拦截,如最大上传值及最小上传值 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" >
<property name="maxUploadSize">
<value>104857600</value>
</property>
<property name="maxInMemorySize">
<value>4096</value>
</property>
<property name="defaultEncoding">
<value>utf-8</value>
</property>
</bean>
</beans>
ApplicationContext-dubbo.xml
<?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-2.5.xsd
http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<!-- 消费方应用名,用于计算依赖关系,不是匹配条件,不要与提供方一样 -->
<dubbo:application name="hehe_consumer" />
<!-- 使用zookeeper注册中心暴露服务地址 -->
<dubbo:registry address="zookeeper://172.30.9.173:2181"/>
<!-- 组播注册 -->
<!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> -->
<!-- 生成远程服务代理,可以像使用本地bean一样使用demoService -->
<dubbo:reference id="userService" interface="com.cl.user.servicei.UserService" />
</beans>
开发完消费者后,启动消费者(启动MyTest类),可以在管控台看到
本次教程教导这里!!Dubbo更多详细的东西还去官网的用户手册寻找吧!! http://dubbo.io/User+Guide-zh.htm http://dubbo.io/ 用户手册说的挺详细的!这里仅供参考!
源码:http://pan.baidu.com/s/1pLg4ivx 密码:a05p