本文转自：/Swing/archive//12/26/128965.html
想做一个文本编辑器的朋友，来这里是找对了！！
下面的代码告诉我们该怎么在文本编辑器中设置字体大小，颜色，加粗，下划线等许多便捷操作~
花了很长的时间找了这么一个资料，真是累煞我了~~！！
差点都要放弃了，最后终于在网络中搜索到了这么一段十分有用、十分有价值的东东！
感谢网络java程序员精英的大公无私，为我们奉献了这么好的代码~~十分感谢！
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
import javax.swing.text.AttributeSet;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.Document;
import javax.swing.text.EditorKit;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
import javax.swing.text.StyledEditorKit;
public class TestFonts extends javax.swing.JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private JPanel jp1;
private JButton color;
private JTextPane jep;
private JScrollPane jsp;
private JButton font;
/**
* Auto-generated main method to display this JFrame
*/
public static void main(String[] args) {
TestFonts inst = new TestFonts();
inst.setVisible(true);
}
public TestFonts() {
super();
initGUI();
}
private void initGUI() {
try {
BorderLayout thisLayout = new BorderLayout();
getContentPane().setLayout(thisLayout);
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
{
jp1 = new JPanel();
getContentPane().add(jp1, BorderLayout.NORTH);
{
font = new JButton();
font.addActionListener(this);
jp1.add(font);
font.setText("font");
}
{
color = new JButton();
jp1.add(color);
color.addActionListener(this);
color.setText("color");
}
}
{
jsp = new JScrollPane();
getContentPane().add(jsp, BorderLayout.CENTER);
{
jep = new JTextPane();
jsp.setViewportView(jep);
jep.setDocument(new DefaultStyledDocument());
}
}
pack();
setSize(400, 300);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void setFontSize(JEditorPane editor, int size) {
if (editor != null) {
if ((size > 0) && (size < 512)) {
MutableAttributeSet attr = new SimpleAttributeSet();
StyleConstants.setFontSize(attr, size);
setCharacterAttributes(editor, attr, false);
} else {
UIManager.getLookAndFeel().provideErrorFeedback(editor);
}
}
}
public static void setForeground(JEditorPane editor, Color fg) {
if (editor != null) {
if (fg != null) {
MutableAttributeSet attr = new SimpleAttributeSet();
StyleConstants.setForeground(attr, fg);
setCharacterAttributes(editor, attr, false);
} else {
UIManager.getLookAndFeel().provideErrorFeedback(editor);
}
}
}
public static final void setCharacterAttributes(JEditorPane editor,
AttributeSet attr, boolean replace) {
int p0 = editor.getSelectionStart();
int p1 = editor.getSelectionEnd();
if (p0 != p1) {
StyledDocument doc = getStyledDocument(editor);
doc.setCharacterAttributes(p0, p1 - p0, attr, replace);
}
StyledEditorKit k = getStyledEditorKit(editor);
MutableAttributeSet inputAttributes = k.getInputAttributes();
if (replace) {
inputAttributes.removeAttributes(inputAttributes);
}
inputAttributes.addAttributes(attr);
}
protected static final StyledDocument getStyledDocument(JEditorPane e) {
Document d = e.getDocument();
if (d instanceof StyledDocument) {
return (StyledDocument) d;
}
throw new IllegalArgumentException("document must be StyledDocument");
}
protected static final StyledEditorKit getStyledEditorKit(JEditorPane e) {
EditorKit k = e.getEditorKit();
if (k instanceof StyledEditorKit) {
return (StyledEditorKit) k;
}
throw new IllegalArgumentException("EditorKit must be StyledEditorKit");
}
public void actionPerformed(ActionEvent e) {
Object obj = e.getSource();
if (obj == font) {
JEditorPane editor = jep;
setFontSize(editor, 20);
}
if (obj == color) {
JEditorPane editor = jep;
setForeground(editor, Color.red);
}
}
}
其他操作如下：
1、对字体的操作
MutableAttributeSet attr = new SimpleAttributeSet();
StyleConstants.setFontFamily(attr, family);
setCharacterAttributes(editor, attr, false);
family为字体
2、对字体大小的操作
MutableAttributeSet attr = new SimpleAttributeSet();
StyleConstants.setFontSize(attr, size);
setCharacterAttributes(editor, attr, false);
size为字号
3、是否是粗体的操作
StyledEditorKit kit = getStyledEditorKit(editor);
MutableAttributeSet attr = kit.getInputAttributes();
boolean bold = (StyleConstants.isBold(attr)) ? false : true;
SimpleAttributeSet sas = new SimpleAttributeSet();
StyleConstants.setBold(sas, bold);
setCharacterAttributes(editor, sas, false);
4、是否是斜体的操作
StyledEditorKit kit = getStyledEditorKit(editor);
MutableAttributeSet attr = kit.getInputAttributes();
boolean italic = (StyleConstants.isItalic(attr)) ? false : true;
SimpleAttributeSet sas = new SimpleAttributeSet();
StyleConstants.setItalic(sas, italic);
setCharacterAttributes(editor, sas, false);
5、是否有下划线的操作
StyledEditorKit kit = getStyledEditorKit(editor);
MutableAttributeSet attr = kit.getInputAttributes();
boolean underline = (StyleConstants.isUnderline(attr)) ? false
: true;
SimpleAttributeSet sas = new SimpleAttributeSet();
StyleConstants.setUnderline(sas, underline);
setCharacterAttributes(editor, sas, false);
6、左中右对齐的处理
MutableAttributeSet attr = new SimpleAttributeSet();
StyleConstants.setAlignment(attr, a);
setParagraphAttributes(editor, attr, false);
public static final void setParagraphAttributes(JEditorPane editor,
AttributeSet attr, boolean replace) {
int p0 = editor.getSelectionStart();
int p1 = editor.getSelectionEnd();
StyledDocument doc = getStyledDocument(editor);
doc.setParagraphAttributes(p0, p1 - p0, attr, replace);
}
a:0：左，1：中，2：右
7、文本字体颜色的设置
MutableAttributeSet attr = new SimpleAttributeSet();
StyleConstants.setForeground(attr, fg);
setCharacterAttributes(editor, attr, false);
fg：为color
8、文本背景颜色的设置
MutableAttributeSet attr = new SimpleAttributeSet();
StyleConstants.setBackground(attr, bg);
setCharacterAttributes(editor, attr, false);
