Spring整合 RMI

Spring整合RMI的原理

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。

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服务端暴露远程服务

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。

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服务端程序：

1 IHelloWorld.java POJO的接口

01.public interface IHelloWorld {  02.    public String helloWorld();  03.  04.    public String sayHelloToSomeBody(String someBodyName);  05.} 

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2 HelloWorld.java POJO的实现

01.public class HelloWorld implements IHelloWorld {  02.  03.    @Override  04.    public String helloWorld() {  05.        return "Hello World!";  06.    }  07.  08.    @Override  09.    public String sayHelloToSomeBody(String someBodyName) {  10.        return "Hello World!" + someBodyName;  11.    }  12.  13.}

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3 spring配置文件rmi_server_context.xml

01.<?xml version="1.0" encoding="UTF-8"?>  02.<beans xmlns="http://www.springframework.org/schema/beans"  03.    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"  04.    xmlns:tx="http://www.springframework.org/schema/tx"  05.    xsi:schemaLocation="http://www.springframework.org/schema/beans  06.http://www.springframework.org/schema/beans/spring-beans-2.0.xsd  07.http://www.springframework.org/schema/aop  08.http://www.springframework.org/schema/aop/spring-aop-2.0.xsd  09.http://www.springframework.org/schema/tx  10.http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">  11.  12.    <bean id="helloWorld" />  13.  14.    <bean id="serviceExporter" ref="helloWorld" />  16.        <!-- 定义服务名 -->  17.        <property name="serviceName" value="hello" />  18.        <property name="serviceInterface" value="springapp.rmi.rmi.IHelloWorld" />  19.        <property name="registryPort" value="8088" />  20.    </bean>  21.  22.</beans>  

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4? 服务端启动RMI的代码HelloHost.java

01.public class HelloHost {  02.    public static void main(String[] args) {  03.        ApplicationContext ctx = new ClassPathXmlApplicationContext(  04.                "rmi_server_context.xml");  05.        System.out.println("RMI服务伴随Spring的启动而启动了.....");  06.    }  07.}  

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客户端

1 配置文件rmi_client_context.xml

01.<?xml version="1.0" encoding="UTF-8"?>  02.<beans xmlns="http://www.springframework.org/schema/beans"  03.    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  04.    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">  05.    <bean id="helloWorld" value="rmi://10.87.40.141:8088/hello" />  07.        <property name="serviceInterface" value="springapp.rmi.rmi.IHelloWorld" />  08.    </bean>  09.</beans>  

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2 客户端代码 HelloClient.java

01.public class HelloClient {  02.  03.    public static void main(String[] args) throws RemoteException {  04.        ApplicationContext ctx = new ClassPathXmlApplicationContext(  05.                "rmi_client_context.xml");  06.        IHelloWorld hs = (IHelloWorld) ctx.getBean("helloWorld");  07.        System.out.println(hs.helloWorld());  08.        System.out.println(hs.sayHelloToSomeBody("Lavasoft"));  09.    }  10.  11.}  

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