两个独立的Java桌面应用程序之间的通 [英] Communication between two separate Java desktop applications

问题描述

我正在寻找开发两个独立的（但相关的）Java桌面应用程序。

I'm looking to develop two separate (but related) Java desktop applications.

我希望一个应用程序能够触发另一个应用程序，传入数据然后可以编辑并传回，即通信将是双向的。如果其他应用程序已经在运行，我希望它们只是通信，即我不想只是通过命令行传递参数等。

I want the ability for one application to trigger the other, passing in data that can then be edited and passed back, i.e. the communication will be two way. If the other application is already running I want them to just communicate, i.e. I dont want to just pass arguments over the command line, etc.

一般来说，什么策略/为了达到这个目的，我应该考虑哪些技术？

Generally speaking, what strategies/techniques should I be looking at in order to achieve this?

推荐答案

要说明让两个应用程序与每个应用程序进行通信是多么容易另外，请使用JGroups查看此网络剪贴板演示。只需启动两个实例并开始将文件放入其中一个实例中。第二个实例将立即显示相同的文件。

To show how easy it is to let two applications communicate with each other, check out this network-clipboard demo using JGroups. Just start two instances and begin dropping files into one of them. The second instance will instantly show the same files.

import java.io.Serializable;
import java.awt.*;
import java.awt.datatransfer.*;
import javax.swing.*;
import org.jgroups.*;

public class JGroupsTest {

    public static void main(String[] args) throws Exception {
        final JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        frame.setSize(500, 300);
        final DefaultListModel listModel = new DefaultListModel();
        final JList panel = new JList(listModel);
        panel.setBackground(new Color(128, 0, 40));
        panel.setForeground(new Color(240, 240, 240));
        frame.add(panel);
        System.setProperty("java.net.preferIPv4Stack", "true");
        final JChannel channel = new JChannel("udp.xml");
        channel.connect("networkclipboard");
        channel.setReceiver(new ReceiverAdapter() {
            @Override
            public void viewAccepted(View newView) {
                frame.setTitle("Network Clipboard - " + channel.getLocalAddress());
            }

            @Override
            public void receive(Message msg) {
                listModel.addElement(msg.getObject());
            }
        });

        panel.setTransferHandler(new TransferHandler() {
            @Override
            public boolean importData(JComponent comp, Transferable t) {
                DataFlavor[] transferDataFlavors = t.getTransferDataFlavors();
                for (DataFlavor flavor : transferDataFlavors) {
                    try {
                        Object data = t.getTransferData(flavor);
                        if (data instanceof Serializable) {
                            Serializable serializable = (Serializable) data;
                            Message msg = new Message();
                            msg.setObject(serializable);
                            channel.send(msg);
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
                return super.importData(comp, t);
            }

            @Override
            public boolean canImport(TransferSupport support) {
                return true;
            }

            @Override
            public boolean canImport(JComponent comp, DataFlavor[] transferFlavors) {
                return true;
            }

        });
    }

}

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