java字体设置，包括大小，颜色，加粗，下划线，对齐，斜体的设置

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 NewJFrame extends javax.swing.JFrame implements ActionListener { 
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) { 
  NewJFrame inst = new NewJFrame(); 
  inst.setVisible(true); 
} 

public NewJFrame() { 
  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);