本文转自：http://www.blogjava.net/Swing/archive/2007/12/26/128965.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);