java实现dde服务端,快速开启dde服务端

DDE是WINDOWS平台上的一个完整的通信协议，它使支持动态数据交换的两个或多个应用程序能彼此交换数据和发送指令,

任何一个DDE Client都可以访问DDE Server的数据，数据交换是通过三个标识名来实现的：

应用程序名（Application）：KSddeserver

主题（Topic）：KStopic

项目（Item）：变量名称

dde server代码如下:

/*
 * Copyright 2013 www.pretty-tools.com. All rights reserved.
 */

import com.pretty_tools.dde.ClipboardFormat;
import com.pretty_tools.dde.DDEException;
import com.pretty_tools.dde.DDEMLException;
import com.pretty_tools.dde.client.DDEClientConversation;
import com.pretty_tools.dde.client.DDEClientEventListener;
import com.pretty_tools.dde.server.DDEServer;

import java.util.Arrays;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * DDE Server Example.
 *
 * @author Alexander Kozlov
 */
public class DDEServerExample
{
    private static final String SERVICE = "MyServer";
    private static final String TOPIC = "MyTopic";
    private static final String MY_ADVISE_ITEM = "MyAdvise";
    private static final String MY_REQUEST_ITEM = "MyRequest";
    private static final String MY_POKE_ITEM = "MyPoke";
    private static final List<String> ITEMS = Arrays.asList(MY_ADVISE_ITEM, MY_REQUEST_ITEM, MY_POKE_ITEM);

    public static void main(String[] args)
    {
        try
        {
            // event to wait disconnection
            final CountDownLatch eventStop = new CountDownLatch(1);
            final AtomicInteger num = new AtomicInteger(1);

            final DDEServer server = new DDEServer(SERVICE) {
                @Override
                protected boolean isTopicSupported(String topicName)
                {
                    return TOPIC.equalsIgnoreCase(topicName);
                }

                @Override
                protected boolean isItemSupported(String topic, String item, int uFmt)
                {
                    return isTopicSupported(topic)
                           && ITEMS.contains(item)
                           && (uFmt == ClipboardFormat.CF_TEXT.getNativeCode() || uFmt == ClipboardFormat.CF_UNICODETEXT.getNativeCode());
                }

                @Override
                protected boolean onExecute(String command)
                {
                    System.out.println("onExecute(" + command + ")");

                    if ("stop".equalsIgnoreCase(command))
                        eventStop.countDown();

                    return true;
                }

                @Override
                protected boolean onPoke(String topic, String item, String data)
                {
                    System.out.println("onPoke(" + topic + ", " + item + ", " + data + ")");

                    return true;
                }

                @Override
                protected boolean onPoke(String topic, String item, byte[] data, int uFmt)
                {
                    System.out.println("onPoke(" + topic + ", " + item + ", " + data + ", " + uFmt + ")");

                    return false; // we do not support it
                }

                @Override
                protected String onRequest(String topic, String item)
                {
                    System.out.println("onRequest(" + topic + ", " + item + ")");

                    return item + " data " + num;
                }

                @Override
                protected byte[] onRequest(String topic, String item, int uFmt)
                {
                    System.out.println("onPoke(" + topic + ", " + item + ", " + uFmt + ")");

                    return null; // we do not support it
                }
            };

            System.out.println("Starting...");
            server.start();

            final Timer timer = new Timer();
            timer.schedule(new TimerTask() {
                @Override
                public void run()
                {
                    num.incrementAndGet();
                    try {
                        System.out.println("notify clients");
                        server.notifyClients(TOPIC, MY_ADVISE_ITEM);
                    } catch (DDEException e) {
                        System.out.println("DDEClientException: " + e.getMessage());
                        cancel();
                    }
                }
            }, 1000L, 500L);

            System.out.println("Waiting for stop...");
            eventStop.await();
            System.out.println("stopping...");
            timer.cancel();
            server.stop();
            System.out.println("Exit from thread");
        }
        catch (DDEMLException e)
        {
            System.out.println("DDEMLException: 0x" + Integer.toHexString(e.getErrorCode()) + " " + e.getMessage());
        }
        catch (DDEException e)
        {
            System.out.println("DDEClientException: " + e.getMessage());
        }
        catch (Exception e)
        {
            System.out.println("Exception: " + e);
        }
    }
}

如果嫌费事的,可以直接下载编译好的jar包,Download all examples and binaries,直接运行下面命令,可以启动dde server.

java -cp .;pretty-tools-JDDE-2.1.0.jar DDEServerExample

windows下可以直接通过excel的公式来订阅dde server的变量,下面以EXCEL应用程序访问数据交换的过程,新建一个EXCEL文件，在相应的单元格中（如第一行、第一列）输入如下代码：

=KSDdeserver|KSTopic!tag1，其中“KSDdeserver|KSTopic!”项是固定形式，如图所示

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