在Spring整合Rmi中:
服务端使用了org.springframework.remoting.rmi.RmiServiceExporter
RmiServiceExporter把任何Spring管理的Bean输出成一个RMI服务。通过把Bean包装在一个适配器类中工作。适配器类被绑定到RMI注册表中，并且将请求代理给服务类。
客户端使用了org.springframework.remoting.rmi.RmiProxyFactoryBean
客户端的核心是RmiProxyFactoryBean，包含serviceURL属性和serviceInterface属性。
通过JRMP访问服务。JRMP JRMP:java remote method protocol，Java特有的,基于流的协议。
下面给出简单例子
服务端程序：
新建接口：
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1 <span style="font-size:18px;color:#3333ff;">/** 2 * IRmiServer.java 3 * 版权所有(C) 2012 4 * 创建:cuiran 2012-08-08 11:12:40 5 */ 6 package com.cayden.rmi; 7 8 /** 9 * TODO 10 * @author cuiran 11 * @version TODO 12 */ 13 public interface IRmiServer { 14 15 public boolean test(); 16 17 } 18 </span>
再实现该接口的方法：
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1 <span style="font-size:18px;color:#3333ff;">/** 2 * RmiServerImpl.java 3 * 版权所有(C) 2012 4 * 创建:cuiran 2012-08-08 11:13:24 5 */ 6 package com.cayden.rmi.impl; 7 8 import com.cayden.rmi.IRmiServer; 9 10 /** 11 * TODO 12 * @author cuiran 13 * @version TODO 14 */ 15 public class RmiServerImpl implements IRmiServer { 16 17 /* (non-Javadoc) 18 * @see com.cayden.rmi.IRmiServer#test() 19 */ 20 @Override 21 public boolean test() { 22 23 System.out.println("调用了我--服务端 O(∩_∩)O哈！"); 24 25 return true; 26 } 27 28 } 29 </span>
在src下新建applicationContext.xml 配置文件
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1 <span style="font-size:18px;color:#3333ff;"><?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.5//EN" "file:/usr/local/tomcat_report/lib/spring-beans-2.0.dtd"> 3 <beans> 4 5 <!-- rmi --> 6 <bean id="rmiService" class="com.cayden.rmi.impl.RmiServerImpl"> 7 </bean> 8 9 <bean id="remoteRmiService" class="org.springframework.remoting.rmi.RmiServiceExporter"> 10 <property name="serviceName"> 11 <value>remoteService</value> 12 </property> 13 <property name="service" ref="rmiService" /> 14 <property name="serviceInterface"> 15 <value>com.cayden.rmi.IRmiServer</value> 16 </property> 17 <property name="registryPort"> 18 <value>9400</value> 19 </property> 20 <property name="servicePort"> 21 <value>9401</value> 22 </property> 23 </bean> 24 </beans></span>
启动服务端的类【MainServer.java】
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1 <span style="font-size:18px;color:#3333ff;">package com.cayden.rmi; 2 3 import org.springframework.context.ApplicationContext; 4 import org.springframework.context.support.ClassPathXmlApplicationContext; 5 /** 6 * MainServer.java 7 * 版权所有(C) 2012 8 * 创建:cuiran 2012-08-08 11:44:07 9 */ 10 11 /** 12 * TODO 13 * @author cuiran 14 * @version TODO 15 */ 16 public class MainServer { 17 18 /** 19 * TODO 20 * @param args 21 */ 22 public static void main(String[] args) { 23 // TODO Auto-generated method stub 24 System.out.println("rmi服务端启动"); 25 ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); 26 27 System.out.println("rmi服务端启动完成。。。"); 28 } 29 30 } 31 </span>
客户端代码：
在客户端使用服务端的接口文件：
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1 <span style="font-size:18px;color:#3333ff;">/** 2 * IRmiServer.java 3 * 版权所有(C) 2012 4 * 创建:cuiran 2012-08-08 11:12:40 5 */ 6 package com.cayden.rmi; 7 8 /** 9 * TODO 10 * @author cuiran 11 * @version TODO 12 */ 13 public interface IRmiServer { 14 15 public boolean test(); 16 17 } 18 </span>
然后在src下新建【applicationContext.xml】
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1 <span style="font-size:18px;color:#3333ff;"><?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.5//EN" "file:/usr/local/tomcat_report/lib/spring-beans-2.0.dtd"> 3 <beans> 4 <!-- rmi远程调用 --> 5 <bean id="testRmiService" class="org.springframework.remoting.rmi.RmiProxyFactoryBean"> 6 <property name="serviceUrl"> 7 <value>rmi://127.0.0.1:9400/remoteService</value> 8 </property> 9 <property name="serviceInterface"> 10 <value>com.cayden.rmi.IRmiServer</value> 11 </property> 12 </bean> 13 </beans></span>
最新新建客户端的测试类【TestRmi.java】
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1 <span style="font-size:18px;color:#3333ff;">/** 2 * TestRmi.java 3 * 版权所有(C) 2012 4 * 创建:cuiran 2012-08-08 11:38:06 5 */ 6 package com.cayden.rmi.client; 7 8 import org.springframework.context.ApplicationContext; 9 import org.springframework.context.support.ClassPathXmlApplicationContext; 10 11 import com.cayden.rmi.IRmiServer; 12 13 /** 14 * TODO 15 * @author cuiran 16 * @version TODO 17 */ 18 public class TestRmi { 19 public static void main(String[] arg) { 20 System.out.println("rmi客户端开始调用"); 21 ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); 22 IRmiServer rmi=(IRmiServer)ctx.getBean("testRmiService"); 23 rmi.test(); 24 System.out.println("rmi客户端调用结束"); 25 } 26 27 } 28 </span>
最后控制台输出
服务端：
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<span style="font-size:18px;color:#3333ff;">rmi服务端启动 log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext). log4j:WARN Please initialize the log4j system properly. rmi服务端启动完成。。。 调用了我--服务端 O(∩_∩)O哈！ </span>
客户端：
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<span style="font-size:18px;color:#3333ff;">rmi客户端开始调用 2012-8-8 11:46:51 org.springframework.context.support.AbstractApplicationContext prepareRefresh 信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1c29ab2: display name [org.springframework.context.support.ClassPathXmlApplicationContext@1c29ab2]; startup date [Wed Aug 08 11:46:51 CST 2012]; root of context hierarchy 2012-8-8 11:46:51 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions 信息: Loading XML bean definitions from class path resource [applicationContext.xml] 2012-8-8 11:46:51 org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory 信息: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@1c29ab2]: org.springframework.beans.factory.support.DefaultListableBeanFactory@1e0bc08 2012-8-8 11:46:51 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons 信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1e0bc08: defining beans [testRmiService]; root of factory hierarchy rmi客户端调用结束 </span>