查找/替换突出显示的单词Netbeans/Java [英] Find/replace Highlight replaced words Netbeans/Java
问题描述
任何想法如何突出显示JTextpane中被替换的单词.我尝试了许多选项，但得到的最接近的结果是，仅单词的首次出现被突出显示，其他突出显示被移动.我用下面的方法.我已经使用它来查找和突出显示单词.因此，我认为如果可以对其进行一些修改，那么我也可以将其用于查找和替换方法.谢谢.
Any ideas how to highlight the replaced words in JTextpane. I tried many options but the closest I get is that only the first occurrence of the word is highlighted, the other highlights are shifted. I used method below. I already used it for finding and highlighting words. So I thought if I could modify it a bit, I could also use it also for find and replace method. Thanks.
Highlighter.HighlightPainter PaintChange = new PaintFind(Color.yellow);
try {
Highlighter color = textpane.getHighlighter();
String find = FieldFind.getText();
String replace = FieldReplace.getText();
Document doc = textpane.getDocument();
String text = doc.getText(0, doc.getLength());
int pos = 0;
int counter = 0;
while((pos=text.toUpperCase().indexOf(find.toUpperCase(), pos))>=0) {
int i = textpane.getText().indexOf(find, 0);
textpane.select(i, i+find.length());
text.replaceSelection(FieldReplace.getText());
color.addHighlight(pos, pos+replace.length(), PaintFind);
pos += find.length();
counter++;
}
status.setText("Nuber of changed words: " + " " + Integer.toString(counter));
} catch(Exception e){
}
推荐答案
我得到的最接近的是仅单词的第一次出现被突出显示，其他突出显示被移位
the closest I get is that only the first occurrence of the word is highlighted, the other highlights are shifted
int i = textpane.getText().indexOf(find, 0);
请勿使用textPane()getText().文本中将包含"\ r \ n".但是，文档仅具有"\ n"，因此用于突出显示的索引每增加一行将被关闭一个.
Don't use textPane()getText(). This will include "\r\n" in the text. However, the Document only has "\n" so then index used for the highlighting will be off by one for each additional line.
您已经使用以下方法从Dcoument中获取了文字:
You already have the text from the Dcoument using:
String text = doc.getText(0, doc.getLength());
所以只需在文本"变量上进行搜索.
so just do the searching on the "text" variable.
查看文本和新行更详细的信息.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
public class FindSSCCE extends JPanel
{
JTextField find = new JTextField(10);
JTextField replace = new JTextField(10);
JTextPane textPane = new JTextPane();
Highlighter.HighlightPainter painter = new DefaultHighlighter.DefaultHighlightPainter( Color.cyan );
public FindSSCCE()
{
setLayout( new BorderLayout() );
JPanel north = new JPanel( new GridLayout(0, 2) );
north.add( new JLabel("Find") );
north.add( find );
north.add( new JLabel("Replace") );
north.add( replace );
add(north, BorderLayout.NORTH);
add(new JScrollPane(textPane));
JButton findReplace = new JButton("Find and Replace");
add(findReplace, BorderLayout.SOUTH);
findReplace.addActionListener( new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
try
{
String findText = find.getText();
int findLength = findText.length();
String replaceText = replace.getText();
int replaceLength = replaceText.length();
Document doc = textPane.getDocument();
String text = doc.getText(0, doc.getLength());
int offset = 0;
while ((offset = text.indexOf(findText, offset)) != -1)
{
textPane.select(offset, offset + findLength);
textPane.replaceSelection( replaceText );
textPane.getHighlighter().addHighlight(offset, offset + replaceLength, painter);
offset += replaceLength;
text = doc.getText(0, doc.getLength());
}
}
catch(BadLocationException ble) {}
}
});
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("FindSSCCE");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add( new FindSSCCE() );
frame.setLocationByPlatform( true );
frame.setSize(400, 300);
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
}
}
请注意，这不是一个非常有效的解决方案，因为每次更改时都需要从文档中获取文本，以确保搜索文本字符串时的偏移量与文档中的文本保持同步.
Note that this is not a very efficient solution because you need to get the text from the Document every time a change is made to make sure the offsets when searching the text string are in sync with the text in the Document.
Edit2:
使用文档中的初始文本字符串的更高效的查找/替换算法:
A more efficient find/replace algorithm that uses the initial text string from the Document:
findReplace.addActionListener( new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
try
{
textPane.getHighlighter().removeAllHighlights();
String findText = find.getText();
int findLength = findText.length();
String replaceText = replace.getText();
int replaceLength = replaceText.length();
Document doc = textPane.getDocument();
String text = doc.getText(0, doc.getLength());
int count = 0;
int offset = 0;
while ((offset = text.indexOf(findText, offset)) != -1)
{
int replaceOffset = offset + ((replaceLength - findLength) * count);
textPane.select(replaceOffset, replaceOffset + findLength);
textPane.replaceSelection( replaceText );
textPane.getHighlighter().addHighlight(replaceOffset, replaceOffset + replaceLength, painter);
offset += replaceLength;
//text = doc.getText(0, doc.getLength());
count++;
}
}
catch(BadLocationException ble) {}
}
});
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