java字体设置，包括大小，颜色，加粗，下划线，对齐，斜体的设置

迈不过友情╰ 2022-07-15 08:24 319阅读 0赞

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);