注：文章转自：
一、定义IDL
module HelloApp{ interface Hello{ string sayHello(); oneway void shutdown(); }; };
没有IDL的专门的开发工具，写起来容易出错，而且不美观，IDEA勉强支持语法高亮，但不支持格式化和语法校验！
二、从IDL生成存根
进入IDL文件存放目录，然后执行：idlj -fall Hello.idl
会生成一批Java文件：
helloCorba\src\HelloApp
HelloPOA.java _HelloStub.java HelloHolder.java HelloHelper.java Hello.java HelloOperations.java
三、实现IDL接口，开发服务端程序
import HelloApp.Hello; import HelloApp.HelloHelper; import HelloApp.HelloPOA; import org.omg.CORBA.ORB; import org.omg.CosNaming.NameComponent; import org.omg.CosNaming.NamingContextExt; import org.omg.CosNaming.NamingContextExtHelper; import org.omg.PortableServer.POA; import org.omg.PortableServer.POAHelper; class HelloImpl extends HelloPOA { private ORB orb; public void setORB(ORB orb_val) { orb = orb_val; } // implement sayHello() method public String sayHello() { return "\nHello world !!\n"; } // implement shutdown() method public void shutdown() { orb.shutdown( false); } } public class HelloServer { public static void main(String args[]) { try { //创建一个ORB实例 ORB orb = ORB.init(args, null); //得到一个RootPOA的引用，并激活POAManager POA rootpoa = POAHelper.narrow(orb.resolve_initial_references( "RootPOA")); rootpoa.the_POAManager().activate(); // create servant and register it with the ORB //创建一个HelloImpl实例（servant），并注册到ORB上 HelloImpl helloImpl = new HelloImpl(); helloImpl.setORB(orb); //从服务中得到对象的引用 org.omg.CORBA.Object ref = rootpoa.servant_to_reference(helloImpl); Hello href = HelloHelper.narrow(ref); //得到一个根名称的上下文 org.omg.CORBA.Object objRef = orb.resolve_initial_references( "NameService"); // Use NamingContextExt which is part of the Interoperable // Naming Service (INS) specification. NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef); //在命名上下文中绑定这个对象 String name = "Hello"; NameComponent path[] = ncRef.to_name(name); ncRef.rebind(path, href); System.out.println( "HelloServer ready and waiting ..."); //启动线程服务，等待客户端的调用 orb.run(); } catch (Exception e) { System.err.println( "ERROR: " + e); e.printStackTrace(System.out); } System.out.println( "HelloServer Exiting ..."); } }
四、实现CORBA的客户端
import HelloApp.Hello; import HelloApp.HelloHelper; import org.omg.CORBA.ORB; import org.omg.CosNaming.NamingContextExt; import org.omg.CosNaming.NamingContextExtHelper; public class HelloClient { static Hello helloImpl; public static void main(String args[]) { try { //创建一个ORB实例 ORB orb = ORB.init(args, null); //获取根名称上下文 org.omg.CORBA.Object objRef = orb.resolve_initial_references( "NameService"); // Use NamingContextExt instead of NamingContext. This is // part of the Interoperable naming Service. NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef); //从命名上下文中获取接口实现对象 String name = "Hello"; helloImpl = HelloHelper.narrow(ncRef.resolve_str(name)); //调用接口对象的方法 System.out.println( "Obtained a handle on server object: " + helloImpl); System.out.println(helloImpl.sayHello()); helloImpl.shutdown(); } catch (Exception e) { System.out.println( "ERROR : " + e); e.printStackTrace(System.out); } }
}
五、运行
1）运行CORBA服务
orbd -ORBInitialPort 1050 -ORBInitialHost 192.168.14.117
2）运行CORBA应用的服务端
java HelloServer -ORBInitialPort 1050
输出：
HelloServer ready and waiting ... HelloServer Exiting ...
3）运行CORBA应用的客户端
java HelloClient -ORBInitialHost 192.168.14.117 -ORBInitialPort 1050
Obtained a handle on server object: IOR:000000000000001749444c3a48656c6c6f4170702f48656c6c6f3a312e30000000000001000000000000008a000102000000000f3139322e3136382e31342e313137000006db000000000031afabcb00000000206d3bb80000000001000000000000000100000008526f6f74504f410000000008000000010000000014000000000000020000000100000020000000000001000100000002050100010001002000010109000000010001010000000026000000020002 Hello world !!
orbd.exe
用法：orbd <选项> 其中，<选项> 包括： -port 启动 ORBD 的激活端口，缺省值为 1049 (可选) -defaultdb ORBD 文件的目录，缺省值为 "./orb.db" (可选) -serverid ORBD 的服务器标识符，缺省值为 1 (可选) -ORBInitialPort 初始端口（必需） -ORBInitialHost 初始主机名称（必需）