Cobol转换成java 提示词

转载

autohost 2024-07-18 13:18:13

文章标签 Cobol转换成java 提示词 java System IDL 文章分类 Java 后端开发

一、题目分析

题目1.Java版CORBA程序1——HelloWorld

实现详解：

1 编写IDL接口HelloWorld.idl：

2编译IDL接口：X:\corba>idlj –fall HelloWorld.idl

3 编写并编译服务端程序:HelloWorldServer.java

4 编写并编译客户端程序: HelloWorldClient.java

5 运行

注意事项：

1、要转到class文件所在目录启动相应程序；

2、名字服务器、服务端和客户端要分别启动一个DOS命令提示符界面。

3、可采用批处理命令启动相应程序，分别为：

(1)启动名字服务器：

tnameserv -ORBInitialPort 1050

@pause

(2)启动服务器端程序：

java HelloWorldServer -ORBInitialPort 1050

@pause

(3)启动客户端程序:

java HelloWorldClient -ORBInitialPort 1050

@pause

要求编写实现显示“Hello，World！+班级+中文姓名”字符串。

题目2.JAVA版CORBA程序2——Counter

要求：

编写实现连加、连减和加减混合等数学++/- -运算，并进行测试。

实现详解：

1 编写IDL接口counter.idl：

2编译IDL接口：X:\corba>idlj –fall counter.idl

3 编写并编译对象实现代码：CounterImpl.java

4 编写并编译服务端程序: Server.java

5 编写并编译客户端程序: Client.java

5 运行

二、CORBA模型分析

题目1.Java版CORBA程序1——HelloWorld

Cobol转换成java 提示词_System

题目2.JAVA版CORBA程序2——Counter

Cobol转换成java 提示词_Cobol转换成java 提示词_02

三、组件实现

题目一：

1 编写IDL接口HelloWorld.idl：

module sample{

interface HelloWorld{

wstring sayHello();

};

说明：CORBA处理字符串有：String和wstring两种类型，string类型主要用于处理ASCII类型的字符串，wstring用于处理多字节的字符串，例如：中文。

2编译IDL接口：X:\corba>idlj –fall HelloWorld.idl

Cobol转换成java 提示词_IDL_03

编译结果生成sample包，生成下述文件

_HelloWorldStub.java

HelloWorld.java

HelloWorldHelper.java

HelloWorldHolder.java

HelloWorldOperations.java

HelloWorldPOA.java

Cobol转换成java 提示词_System_04

3 编写并编译服务端程序:HelloWorldServer.java

import sample.;
 import org.omg.CosNaming.;
 import org.omg.CosNaming.NamingContextPackage.;
 import org.omg.CORBA.;
 import org.omg.CORBA.portable.;
 import org.omg.PortableServer.;
 class HelloWorldServant extends HelloWorldPOA{ //对象实现类
 public String sayHello(){
 return “\nHello World!1702堇忆\n”;
 }
 }
 public class HelloWorldServer{ //服务程序
 public static void main(String args[]){
 try{
 //初始化ORB
 ORB orb = ORB.init(args, null);
 //取根POA的引用
 org.omg.CORBA.Object poaobj = orb.resolve_initial_references (“RootPOA”);
 org.omg.PortableServer.POA rootPOA = org.omg.PortableServer.POAHelper.narrow(poaobj);
 org.omg.PortableServer.POAManager manager = rootPOA.the_POAManager();
 //创建伺服对象
 HelloWorldServant objRef = new HelloWorldServant();
 HelloWorld obj = objRef._this(orb);
 //绑定命名服务
 NamingContext ncRef = NamingContextHelper.narrow(orb.resolve_initial_references(“NameService”));
 NameComponent nc = new NameComponent(“Hello”, “”);
 NameComponent path[] = {nc};
 ncRef.rebind(path, obj);
 //激活POA管理器
 manager.activate();
 //等待处理客户程序的请求
 System.out.println(“HelloWorld is running!”);
 orb.run();
 }catch (Exception e) {
 System.err.println(“ERROR: " + e);
 e.printStackTrace(System.out);
 }
 }

}

4 编写并编译客户端程序: HelloWorldClient.java

import sample.;
import org.omg.CosNaming.;

import org.omg.CORBA.;
public class HelloWorldClient {
public static void main(String args[]) {
try{
ORB orb = ORB.init(args, null);
org.omg.CORBA.Object objRef = orb.resolve_initial_references(“NameService”);
NamingContext ncRef = NamingContextHelper.narrow(objRef);
NameComponent nc = new NameComponent(“Hello”,"");
NameComponent path[] = {nc};
HelloWorld helloWorld = HelloWorldHelper.narrow(ncRef.resolve(path));
String hello = helloWorld.sayHello();
System.out.println(hello);
} catch (Exception e) {
System.out.println("ERROR : " + e) ;
e.printStackTrace(System.out);
}
}
}

5 运行
启动名字服务器：X:\corba >tnameserv -ORBInitialPort 1050

启动服务端程序：X:\corba >java HelloWorldServer -ORBInitialPort 1050
输出：HelloWorld is running

启动客户端程序：X:\corba >java HelloWorldClient -ORBInitialPort 1050
输出：Hello World!1702堇忆

题目二：
1 编写IDL接口counter.idl：
module CounterApp{
interface Counter{
readonly attribute long value;
void inc();
void dec();
};
};
2编译IDL接口：X:\corba>idlj –fall counter.idl

编译结果生成CounterApp包，生成下述文件
_CounterStub.java
Counter.java
CounterHelper.java
CounterHolder.java
CounterOperations.java
CounterPOA.java

3 编写并编译对象实现代码：CounterImpl.java

import CounterApp.;
 public class CounterImpl extends CounterPOA {
 private int count;
 public CounterImpl(){
 count = 0;
 }
 public void inc(){
 count++;
 }
 public void dec(){
 count - -;
 }
 public int value(){
 return count;
 }
 }

4 编写并编译服务端程序: Server.java

import CounterApp.;
 import java.io.;
 import org.omg.CosNaming.;
 import org.omg.CosNaming.NamingContextPackage.;
 import org.omg.CORBA.;
 import org.omg.CORBA.portable.;
 import org.omg.PortableServer.;
 public class Server {
 public static void main(String[] args){
 try{
 ORB orb = ORB.init(args, null);
 org.omg.CORBA.Object poaobj = orb.resolve_initial_references (“RootPOA”);
 org.omg.PortableServer.POA rootPOA = org.omg.PortableServer.POAHelper.narrow(poaobj);
 org.omg.PortableServer.POAManager manager = rootPOA.the_POAManager();
 CounterImpl c_impl = new CounterImpl();
 Counter c = c_impl._this(orb);
 NamingContext ncRef = NamingContextHelper.narrow(orb.resolve_initial_references(“NameService”));
 NameComponent nc = new NameComponent(“Count”, “”);
 NameComponent path[] = {nc};
 ncRef.rebind(path, c);
 FileOutputStream file = new FileOutputStream(“Counter.ref”);
 PrintWriter writer = new PrintWriter(file);
 String ref = orb.object_to_string©;
 writer.println(ref);
 writer.flush();
 file.close();
 System.out.println(“Server started.”+" Stop:Ctrl-c");
 rootPOA.the_POAManager().activate();
 orb.run();
 }catch(IOException ex){
 System.out.println(“File error:”+ex.getMessage());
 System.exit(2);
 }catch(Exception ex){
 System.out.println("Exception: "+ex.getMessage());
 System.exit(1);
 }
 }
 }
 5 编写并编译客户端程序: Client.java（如图3.10及3.11）
 import CounterApp.;
 import java.util.;
 import java.io.;
 import org.omg.CORBA.;
 import org.omg.CosNaming.;
 public class Client {
 public static void main(String[] args){
 try{
 ORB orb = ORB.init(args, null);
 org.omg.CORBA.Object obj = orb.resolve_initial_references(“NameService”);
 NamingContext ncRef = NamingContextHelper.narrow(obj);
 NameComponent nc = new NameComponent(“Count”,”");
 NameComponent path[] = {nc};
 String ref = null;
 try{
 Scanner reader = new Scanner(new File(“Counter.ref”));
 ref = reader.nextLine();
 }catch(IOException ex){
 System.out.println("File error: "+ex.getMessage());
 System.exit(2);
 }
 obj = orb.string_to_object(ref);
 if(obj == null){
 System.out.println(“Invalid IOR”);
 System.exit(4);
 }
 Counter c = null;
 try{
 c = CounterHelper.narrow(obj);
 }catch(BAD_PARAM ex){
 System.out.println(“Narrowing failed”);
 System.exit(3);
 }
 int inp = -1;
 do{
 System.out.print(“Counter value: “+c.value()+”\nAction(+/-/e)?”);
 System.out.flush();
 do{
 try{
 inp = System.in.read();
 }catch(IOException ioe){}
 }while(inp != ‘+’ && inp != ‘-’ && inp != ‘e’);
 if(inp == ‘+’)
 c.inc();
 else if(inp == ‘-’)
 c.dec();
 }while(inp != ‘e’);
 }catch(Exception ex){
 System.out.println("Exception: "+ex.getMessage());
 System.exit(1);
 }
 }
 }

Cobol转换成java 提示词_IDL_12