swing 聊天窗体，支持图文模式

package com.*.test;

import java.awt.EventQueue;
import java.awt.HeadlessException;
import java.awt.Toolkit;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.UnsupportedFlavorException;

import javax.swing.JFrame;
import javax.swing.text.EditorKit;
import javax.swing.text.html.HTMLEditorKit;

import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.IOUtils;

import javax.swing.JEditorPane;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JScrollPane;
import javax.swing.KeyStroke;
import javax.swing.event.AncestorEvent;
import javax.swing.event.AncestorListener;

import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collection;
import java.awt.event.ActionEvent;

public class ChatForm {

    private JFrame frame;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    ChatForm window = new ChatForm();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     */
    public ChatForm() {
        initialize();
    }

    /**
     * Initialize the contents of the frame.
     */
    private void initialize() {
        frame = new JFrame("与 XXX 对话");
        frame.setSize(766, 615);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(null);
        EditorKit k = new HTMLEditorKit();

        JScrollPane scrollPane_1 = new JScrollPane();
        scrollPane_1.setBounds(10, 10, 730, 350);
        frame.getContentPane().add(scrollPane_1);

        final JEditorPane editorPane = new JEditorPane();
        scrollPane_1.setViewportView(editorPane);
        editorPane.setEditable(false);
        editorPane.setEditorKit(k);

        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setBounds(10, 373, 730, 161);
        frame.getContentPane().add(scrollPane);

        final JEditorPane editorPane_1 = new JEditorPane();
        scrollPane.setViewportView(editorPane_1);
        editorPane_1.setEditorKit(k);

        // 注册剪贴板事件
        KeyStroke aKeyStroke = KeyStroke.getKeyStroke(KeyEvent.VK_V, ActionEvent.CTRL_MASK, true);
        editorPane_1.addAncestorListener(new AncestorListener() {

            @Override
            public void ancestorRemoved(AncestorEvent event) {
                System.out.println("ancestorRemoved");
            }

            @Override
            public void ancestorMoved(AncestorEvent event) {
                System.out.println("ancestorMoved");
                System.out.println(editorPane_1.getText());
            }

            @Override
            public void ancestorAdded(AncestorEvent event) {
                System.out.println("ancestorAdded");

            }
        });

        // 注册ctrl+v事件，每次添加都是在文档html末尾追加的方式，所以可以多次粘贴
        editorPane_1.registerKeyboardAction(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                DataFlavor[] flavots = Toolkit.getDefaultToolkit().getSystemClipboard().getAvailableDataFlavors();
                for (DataFlavor dataFlavor : flavots) {
                    try {

                        // 获取剪贴板数据
                        Object obj = Toolkit.getDefaultToolkit().getSystemClipboard().getData(dataFlavor);
                        System.out.println(obj.getClass());
                        // 如果是文字内容
                        if (obj instanceof InputStream) {
                            InputStream bts = (InputStream) obj;
                            editorPane_1.setText(editorPane_1.getText().replace("</body>", IOUtils.readLines(bts, "utf-8").toString().replaceAll("\n", "<br/></body>")));
                        } else if (obj instanceof Collection<?>) {
                            // 多文件内容
                            Collection<?> c = (Collection<?>) obj;
                            String s = "";

                            for (Object object : c) {
                                File f = (File) object;
                                if (FilenameUtils.getExtension(f.getName()).equals("jpg")) {
                                    s += "<img style=\\\"height:300px;width:200px\\\" src='file:///" + f.getAbsolutePath() + "'/><br/>";
                                }
                            }
                            editorPane_1.setText(s.replace("</body>", s + "</br></body>"));
                        } else if (obj instanceof BufferedImage) {
                            // 截图内容
                            BufferedImage img = (BufferedImage) obj;
                            String savePath = Thread.currentThread().getContextClassLoader().getResource("").getPath();
                            savePath = FilenameUtils.separatorsToUnix(savePath);
                            System.out.println(savePath);
                            File file = new File(savePath + "/" + System.currentTimeMillis() + ".png");
                            ImageIO.write(img, "png", file);

                            editorPane_1.setText(editorPane_1.getText().replace("</body>", "<img style=\"height:300px;width:200px\" src='file:///" + file.getAbsolutePath() + "'/><br/></body>"));
                        }
                    } catch (HeadlessException e1) {
                        e1.printStackTrace();
                    } catch (UnsupportedFlavorException e1) {
                        e1.printStackTrace();
                    } catch (IOException e1) {
                        e1.printStackTrace();
                    }
                }
            }
        }, aKeyStroke, JComponent.WHEN_IN_FOCUSED_WINDOW);
        JButton button = new JButton("发送");

        // 点击发送按钮的事件
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                // 清空下面的内容，设置上面的内容
                String s = editorPane_1.getText();
                editorPane_1.setText("");
                editorPane.setText(s);
            }
        });

        // 注册ctrl+回车事件
        button.registerKeyboardAction(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                // 清空下面的内容，设置上面的内容
                String s = editorPane_1.getText();
                editorPane_1.setText("");
                editorPane.setText(s);
            }
        }, KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, ActionEvent.CTRL_MASK, true), JComponent.WHEN_IN_FOCUSED_WINDOW);
        button.setBounds(628, 544, 93, 23);
        frame.getContentPane().add(button);
    }
}