Java剪贴板未与系统共享
我有一个格式为HTML的JEditorPane字段,当我将其复制到剪贴板时,系统将丢失所有换行符 窗格中的文本:Java剪贴板未与系统共享,java,clipboard,Java,Clipboard,我有一个格式为HTML的JEditorPane字段,当我将其复制到剪贴板时,系统将丢失所有换行符 窗格中的文本: <html> <head> </head> <body> <p> Bonjour,<br><br>Merci de faire les actions ci-dessous:<br><br>1- Sauvegarder le fi
<html>
<head>
</head>
<body>
<p>
Bonjour,<br><br>Merci de faire les actions ci-dessous:<br><br>1-
Sauvegarder le fichier AAAA<br>2- Remplacer le contenu du
fichier AAAA par le contenu fichier
BBBBB <br>3- Relancer au step planté<br><br>Cordialement,<br>
</p>
</body>
</html>
所以,我截取了Ctrl+C:
public void keyPressed(KeyEvent e) {
//Modify clipboard Ctrl+C
if ((e.getKeyCode() == KeyEvent.VK_C) && ((e.getModifiers() & KeyEvent.CTRL_MASK) != 0)) {
super.keyPressed(e);
genericFunctions.setClipboardText(edSolution.getText());//see function bellow
}
我尝试过修改它:
static void setClipboardText(String s) {
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
StringSelection stringSelection = new StringSelection(s);
clipboard.setContents(stringSelection, stringSelection);
}
但是剪贴板中的文本没有改变
奇怪的是,如果我使用下面的函数:
static void setClipboardText(String s) {
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
Clipboard selection = Toolkit.getDefaultToolkit().getSystemSelection();
StringSelection stringSelection = new StringSelection(s);
StringSelection stringS = new StringSelection(s);
clipboard.setContents(stringSelection, stringSelection);
selection.setContents(stringS, stringS);//error AWT-EventQueue-0" java.lang.NullPointerException"
}
即使我得到了一个NullPointerException,剪贴板还是用新值进行了很好的修改
有人能告诉我为什么剪贴板只在错误发生后而不是之前刷新吗?
我如何向系统宣布剪贴板已更改并应读取它
JDK8 v1.8.0_251我猜测“默认”复制操作只会将编辑器中的文本复制为“纯文本”——或者至少,这是接收者可用的选项之一,并将其作为首选项(我无法轻松访问Java源代码以深入了解默认实现) 如中所述,您可以覆盖默认的“复制”操作并插入自己的工作流/格式 这是一个非常简单的概念示例。当我用它复制和粘贴文本时,我得到了完整的HTML文本 如果您不想简单地获取带换行符的文本,您必须自己解释内容并生成合适的输出
String
,那么您可以使用DataFlavor.stringFlavor
作为主要数据样式,但这已经超出了范围
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringBufferInputStream;
import java.io.StringReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import javax.swing.AbstractAction;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame();
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private JEditorPane editorPane;
public TestPane() {
URL url = getClass().getResource("Text.html");
editorPane = new JEditorPane();
editorPane.setContentType("html/text");
try {
editorPane.setPage(url);
} catch (IOException ex) {
ex.printStackTrace();
}
editorPane.getActionMap().put("copy", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
String text = editorPane.getText();
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
clipboard.setContents(new HtmlSelection(text), null);
}
});
setLayout(new BorderLayout());
add(new JScrollPane(editorPane));
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
}
private static class HtmlSelection implements Transferable {
private static List<DataFlavor> htmlFlavors = new ArrayList<>(3);
static {
try {
htmlFlavors.add(new DataFlavor("text/html;class=java.lang.String"));
htmlFlavors.add(new DataFlavor("text/html;class=java.io.Reader"));
htmlFlavors.add(new DataFlavor("text/html;charset=unicode;class=java.io.InputStream"));
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
}
}
private String html;
public HtmlSelection(String html) {
this.html = html;
}
public DataFlavor[] getTransferDataFlavors() {
return (DataFlavor[]) htmlFlavors.toArray(new DataFlavor[htmlFlavors.size()]);
}
public boolean isDataFlavorSupported(DataFlavor flavor) {
return htmlFlavors.contains(flavor);
}
public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException {
if (String.class.equals(flavor.getRepresentationClass())) {
return html;
} else if (Reader.class.equals(flavor.getRepresentationClass())) {
return new StringReader(html);
} else if (InputStream.class.equals(flavor.getRepresentationClass())) {
return new StringBufferInputStream(html);
}
throw new UnsupportedFlavorException(flavor);
}
}
}
问题是,它没有考虑样式化标记。乔伊
所以,在多读了一点之后,我发现-
所以,我修改了原始代码,使用了与此相同的概念
editorPane.getActionMap().put("copy", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
String text = editorPane.getText();
text = formattedPlainText(text);
StringSelection selection = new StringSelection(text);
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
clipboard.setContents(selection, selection);
}
protected String formattedPlainText(String text) {
final StringBuilder sb = new StringBuilder();
HTMLEditorKit.ParserCallback parserCallback = new HTMLEditorKit.ParserCallback() {
public boolean readyForNewline;
@Override
public void handleText(final char[] data, final int pos) {
String s = new String(data);
sb.append(s.trim());
readyForNewline = true;
}
@Override
public void handleStartTag(final HTML.Tag t, final MutableAttributeSet a, final int pos) {
if (readyForNewline && (t == HTML.Tag.DIV || t == HTML.Tag.BR || t == HTML.Tag.P)) {
sb.append("\n");
readyForNewline = false;
}
}
@Override
public void handleSimpleTag(final HTML.Tag t, final MutableAttributeSet a, final int pos) {
handleStartTag(t, a, pos);
}
};
try {
new ParserDelegator().parse(new StringReader(text), parserCallback, false);
} catch (IOException ex) {
ex.printStackTrace();
}
return sb.toString();
}
});
我现在可以在复制文本时得到这个
你好,谢天谢地,我们行动起来了:
1-Sauvegarder le fichier AAAA
2 -遗赠者 3-Relancer au step planté
诚意 卡韦
这两个例子将忽略选择,并将复制整个文本-这是我的时间限制。如果需要,从
样式文档
中提取样式化标记并确定如何最好地格式化文本将需要更多的努力。问题可能不是文本如何复制到剪贴板,而是接收者如何将其解释为“如何”它是从剪贴板中提取出来的,这将是接收者和发起者的支持导出选项的一个“种类”和它的兄弟。这两个示例都覆盖了组件的默认“复制”操作,并在其中注入了自己的内容导出逻辑。注意使用自定义的DataFlavor
,以避免使用有利于HTMLTank you的“纯文本”!我将外部化格式化的纯文本,因为我需要对多个JeditorPane使用相同的功能。
public void exportToClipboard(JComponent comp, Clipboard clipboard,
int action) throws IllegalStateException {
if (comp instanceof JTextComponent) {
JTextComponent text = (JTextComponent)comp;
int p0 = text.getSelectionStart();
int p1 = text.getSelectionEnd();
if (p0 != p1) {
try {
Document doc = text.getDocument();
String srcData = doc.getText(p0, p1 - p0);
StringSelection contents =new StringSelection(srcData);
// this may throw an IllegalStateException,
// but it will be caught and handled in the
// action that invoked this method
clipboard.setContents(contents, null);
if (action == TransferHandler.MOVE) {
doc.remove(p0, p1 - p0);
}
} catch (BadLocationException ble) {}
}
}
}
editorPane.getActionMap().put("copy", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
String text = editorPane.getText();
text = formattedPlainText(text);
StringSelection selection = new StringSelection(text);
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
clipboard.setContents(selection, selection);
}
protected String formattedPlainText(String text) {
final StringBuilder sb = new StringBuilder();
HTMLEditorKit.ParserCallback parserCallback = new HTMLEditorKit.ParserCallback() {
public boolean readyForNewline;
@Override
public void handleText(final char[] data, final int pos) {
String s = new String(data);
sb.append(s.trim());
readyForNewline = true;
}
@Override
public void handleStartTag(final HTML.Tag t, final MutableAttributeSet a, final int pos) {
if (readyForNewline && (t == HTML.Tag.DIV || t == HTML.Tag.BR || t == HTML.Tag.P)) {
sb.append("\n");
readyForNewline = false;
}
}
@Override
public void handleSimpleTag(final HTML.Tag t, final MutableAttributeSet a, final int pos) {
handleStartTag(t, a, pos);
}
};
try {
new ParserDelegator().parse(new StringReader(text), parserCallback, false);
} catch (IOException ex) {
ex.printStackTrace();
}
return sb.toString();
}
});