Spring RMI调用远程方法

以你之姓@ 2022-08-20 03:16 196阅读 0赞

转自： [http://blog.csdn.net/junshuaizhang/article/details/27357701][http_blog.csdn.net_junshuaizhang_article_details_27357701]

Spring有多种调用远程的方式，今天学习了一下远程方法调用（RMI）。

RMI需要服务端和客户端

![SouthEast][]

我们先从服务器开始

我的代码结构

![SouthEast 1][]

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1.  package rmi;  
2.    
3.  public interface ServerRmiI \{  
4.    
5.      public String sayHi(String name);  
6.  \}

package rmi;
    
    public interface ServerRmiI {
    
    	public String sayHi(String name);
    }

1.  package rmi;  
2.    
3.  public class ServerRmiImpl implements ServerRmiI\{  
4.    
5.       public String sayHi(String name) \{  
6.        return "Hi,"\+name;  
7.       \}  
8.    
9.  \}

package rmi;
    
    public class ServerRmiImpl implements ServerRmiI{
    
    	 public String sayHi(String name) {
    	  return "Hi,"+name;
    	 }
    
    }

1.  package rmi;  
2.    
3.  import org.springframework.context.ApplicationContext;  
4.  import org.springframework.context.support.ClassPathXmlApplicationContext;  
5.    
6.  public class Testrun \{  
7.    
8.      /\*\* 
9.       \* <p> 
10.      \* </p> 
11.      \* @author zhangjunshuai 
12.      \* @date 2014-5-28 下午5:06:06 
13.      \* @param args 
14.      \*/  
15.     public static void main(String\[\] args) \{  
16.         // TODO Auto-generated method stub  
17.         ApplicationContext context = new ClassPathXmlApplicationContext("classpath:applicationContext-bean.xml");  
18.         context.getBean("serverTest");   
19.     \}  
20.   
21. \}

package rmi;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class Testrun {
    
    	/**
    	 * <p>
    	 * </p>
    	 * @author zhangjunshuai
    	 * @date 2014-5-28 下午5:06:06
    	 * @param args
    	 */
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    		ApplicationContext context = new ClassPathXmlApplicationContext("classpath:applicationContext-bean.xml");
            context.getBean("serverTest"); 
    	}
    
    }

配置：

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1.  <?xml version="1.0" encoding="utf-8"?>  
2.  <beans xmlns="http://www.springframework.org/schema/beans"  
3.      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
4.      xmlns:context="http://www.springframework.org/schema/context"  
5.      xsi:schemaLocation="http://www.springframework.org/schema/beans   
6.      http://www.springframework.org/schema/beans/spring-beans-2.5.xsd  
7.      http://www.springframework.org/schema/context   
8.   http://www.springframework.org/schema/context/spring-context-2.5.xsd"  
9.      default-autowire="byName" default-lazy-init="true">     
10.      <bean name="rmiserver" class="rmi.ServerRmiImpl"/>  
11.      <bean name="serverTest" class="org.springframework.remoting.rmi.RmiServiceExporter">  
12.        <property name="service" ref="rmiserver"/>  
13.        <property name="serviceName" value="serverRmiTest"/>  
14.        <property name="serviceInterface" value="rmi.ServerRmiI"/>  
15.        <property name="registryPort" value="1021"/>  
16.      </bean>  
17. </beans>

<?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"
        xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
        http://www.springframework.org/schema/context 
     http://www.springframework.org/schema/context/spring-context-2.5.xsd"
        default-autowire="byName" default-lazy-init="true">   
         <bean name="rmiserver" class="rmi.ServerRmiImpl"/>
         <bean name="serverTest" class="org.springframework.remoting.rmi.RmiServiceExporter">
           <property name="service" ref="rmiserver"/>
           <property name="serviceName" value="serverRmiTest"/>
           <property name="serviceInterface" value="rmi.ServerRmiI"/>
           <property name="registryPort" value="1021"/>
         </bean>
    </beans>

说明：service本地实现，serviceName对外提供的名称对外提供的名称，registyPort开启端口

![SouthEast 2][]

客户端：

代码结构

![SouthEast 3][]

首先要定义对应接口

1.  package client;  
2.    
3.  public interface ServerRmiI \{  
4.    
5.      public String sayHi(String name);  
6.  \}

package client;
    
    public interface ServerRmiI {
    
    	public String sayHi(String name);
    }

测试方法

1.  package client;  
2.    
3.  import org.springframework.context.ApplicationContext;  
4.  import org.springframework.context.support.ClassPathXmlApplicationContext;  
5.    
6.  public class TestRun \{  
7.    
8.      public static void main(String\[\] args) \{  
9.            ApplicationContext context = new ClassPathXmlApplicationContext("classpath:/config/applicationContext-rmi-client.xml");  
10.                 ServerRmiI rmiI = (ServerRmiI) context.getBean("clentrmi");  
11.                 System.out.println(rmiI.sayHi("rmi"));  
12.          \}  
13. \}

package client;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class TestRun {
    
    	public static void main(String[] args) {
    		  ApplicationContext context = new ClassPathXmlApplicationContext("classpath:/config/applicationContext-rmi-client.xml");
    		        ServerRmiI rmiI = (ServerRmiI) context.getBean("clentrmi");
    		        System.out.println(rmiI.sayHi("rmi"));
    		 }
    }

配置文件

1.  <?xml version="1.0" encoding="utf-8"?>  
2.  <beans xmlns="http://www.springframework.org/schema/beans"  
3.      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
4.      xmlns:context="http://www.springframework.org/schema/context"  
5.      xsi:schemaLocation="http://www.springframework.org/schema/beans   
6.      http://www.springframework.org/schema/beans/spring-beans-2.5.xsd  
7.      http://www.springframework.org/schema/context   
8.   http://www.springframework.org/schema/context/spring-context-2.5.xsd"  
9.      default-autowire="byName" default-lazy-init="true">     
10.      <bean name="clentrmi" class="org.springframework.remoting.rmi.RmiProxyFactoryBean">  
11.      <property name="serviceUrl" value="rmi://127.0.0.1:1021/serverRmiTest"/>  
12.      <property name="serviceInterface" value="client.ServerRmiI"/>  
13.      </bean>  
14. </beans>

<?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"
        xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
        http://www.springframework.org/schema/context 
     http://www.springframework.org/schema/context/spring-context-2.5.xsd"
        default-autowire="byName" default-lazy-init="true">   
         <bean name="clentrmi" class="org.springframework.remoting.rmi.RmiProxyFactoryBean">
         <property name="serviceUrl" value="rmi://127.0.0.1:1021/serverRmiTest"/>
         <property name="serviceInterface" value="client.ServerRmiI"/>
         </bean>
    </beans>

后台成功输出“hi”说明执行成功

需要注意：

1、RMI是很难穿越防火墙的；

2、RMI是基于Java的，这意味着客户端和服务端必须都是采用Java开发的；

3、因为RMI使用了Java的序列化机制，所以通过网络传输的对象类型必须保证在调用的两端是相同的版本。

\-------------------------------------------------------------------------------------------------------------------------------------------------------------

参考：

《Spring事件（第3版）》

《Spring高级程序设计》

[http_blog.csdn.net_junshuaizhang_article_details_27357701]: http://blog.csdn.net/junshuaizhang/article/details/27357701
[SouthEast]: /images/20220731/ded1c5f98a7f4ac5928d98f46f67797b.png
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