java打印机.doc

猪哥解答：我这里有以前收藏的代码，两个类实现了简易的文本打印机的功能，包括预览。简单跟你说一下。1、PrinterDemo.java主体类，也是入口类，里面有main方法可以直接在Eclipse中调试运行，他实现了从本地磁盘读取文本类文件打印以及打印预览的功能，其中File动作按钮中的PrintPreviw就是打印预览功能，你可以运行看看。2、PrintPreview.java打印预览类，这是专门为预览打印设计的类，通过他的构造方法可以构造出一个预览类，PrinterDemo中的预览功能就是调用了这个类。两个类的源码：【PrinterDemo.java】的源码：import java.awt.BorderLayout;import java.awt.Color;import java.awt.Container;import java.awt.Dimension;import java.awt.Event;import java.awt.Font;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.KeyEvent;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.awt.print.PageFormat;import java.awt.print.Printable;import java.awt.print.PrinterException;import java.awt.print.PrinterJob;import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.IOException;import java.util.Vector;import javax.swing.AbstractAction;import javax.swing.JComponent;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JScrollPane;import javax.swing.KeyStroke;public class PrinterDemo extends JFrame private static final long serialVersionUID = 1L; private PageFormat pageFormat; private FilePageRenderer pageRenderer; private String title; public PrinterDemo() super(); init(); PrinterJob pj = PrinterJob.getPrinterJob(); pageFormat = pj.defaultPage(); setVisible(true); protected void init() setSize(350, 300); center(); Container content = getContentPane(); content.setLayout(new BorderLayout(); JMenuBar mb = new JMenuBar(); JMenu file = new JMenu(File, true); file.add(new FileOpenAction().setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,Event.CTRL_MASK); file.add(new FilePrintPreviwAction().setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, Event.ALT_MASK); file.add(new FilePrintAction().setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P,Event.CTRL_MASK); file.add(new FilePageSetupAction().setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, Event.CTRL_MASK| Event.SHIFT_MASK); file.addSeparator(); file.add(new FileQuitAction().setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q, Event.CTRL_MASK); mb.add(file); JMenu page = new JMenu(Page, true); page.add(new PageNextPageAction() .setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0); page.add(new PagePreviousPageAction() .setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_UP, 0); mb.add(page); setJMenuBar(mb); getContentPane().setLayout(new BorderLayout(); addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) System.exit(0); ); protected void center() Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); Dimension frameSize = getSize(); int x = (screenSize.width - frameSize.width) / 2; int y = (screenSize.height - frameSize.height) / 2; setLocation(x, y); public void showTitle() int currentPage = pageRenderer.getCurrentPage() + 1; int numPages = pageRenderer.getNumPages(); setTitle(title + - page + currentPage + of + numPages); public class FileOpenAction extends AbstractAction private static final long serialVersionUID = 1L; public FileOpenAction() super(Open.); public void actionPerformed(ActionEvent ae) / Pop up a file dialog. JFileChooser fc = new JFileChooser(.); int result = fc.showOpenDialog(PrinterDemo.this); if (result != 0) return; java.io.File f = fc.getSelectedFile(); if (f = null) return; / Load the specified file. try pageRenderer = new FilePageRenderer(f, pageFormat); title = + f.getName() + ; showTitle(); JScrollPane jsp = new JScrollPane(pageRenderer); getContentPane().removeAll(); getContentPane().add(jsp, BorderLayout.CENTER); validate(); catch (java.io.IOException ioe) System.out.println(ioe); public static void main(String args) new PrinterDemo(); public class FilePrintPreviwAction extends AbstractAction private static final long serialVersionUID = 1L; public FilePrintPreviwAction() super(PrintPreviw); public void actionPerformed(ActionEvent ae) new PrintPreview(pageRenderer,PrintPreviw,pageFormat.getOrientation(); public class FilePrintAction extends AbstractAction private static final long serialVersionUID = 1L; public FilePrintAction() super(Print); public void actionPerformed(ActionEvent ae) PrinterJob pj = PrinterJob.getPrinterJob(); pj.setPrintable(pageRenderer, pageFormat); if (pj.printDialog() try pj.print(); catch (PrinterException e) System.out.println(e); public class FilePageSetupAction extends AbstractAction private static final long serialVersionUID = 1L; public FilePageSetupAction() super(Page setup.); public void actionPerformed(ActionEvent ae) PrinterJob pj = PrinterJob.getPrinterJob(); pageFormat = pj.pageDialog(pageFormat); if (pageRenderer != null) pageRenderer.pageInit(pageFormat); showTitle(); public class FileQuitAction extends AbstractAction private static final long serialVersionUID = 1L; public FileQuitAction() super(Quit); public void actionPerformed(ActionEvent ae) System.exit(0); public class PageNextPageAction extends AbstractAction private static final long serialVersionUID = 1L; public PageNextPageAction() super(Next page); public void actionPerformed(ActionEvent ae) if (pageRenderer != null) pageRenderer.nextPage(); showTitle(); public class PagePreviousPageAction extends AbstractAction private static final long serialVersionUID = 1L; public PagePreviousPageAction() super(Previous page); public void actionPerformed(ActionEvent ae) if (pageRenderer != null) pageRenderer.previousPage(); showTitle(); class FilePageRenderer extends JComponent implements Printable private static final long serialVersionUID = 1L; private int currentPageIndex; private Vector lineVector; private Vector pageVector; private Font font; private int fontSize; private Dimension preferredSize; public FilePageRenderer(File file, PageFormat pageFormat) throws IOException fontSize = 12; font = new Font(Serif, Font.PLAIN, fontSize); BufferedReader in = new BufferedReader(new FileReader(file); String line; lineVector = new Vector(); while (line = in.readLine() != null) lineVector.addElement(line); in.close(); pageInit(pageFormat); public void pageInit(PageFormat pageFormat) currentPageIndex = 0; pageVector = new Vector(); float y = fontSize; Vector page = new Vector(); for (int i = 0; i pageFormat.getImageableHeight() y = 0; pageVector.addElement(page); page = new Vector(); if (page.size() 0) pageVector.addElement(page); preferredSize = new Dimension(int) pageFormat.getImageableWidth(), (int) pageFormat.getImageableHeight(); repaint(); public void paintComponent(Graphics g) Graphics2D g2 = (Graphics2D) g; java.awt.geom.Rectangle2D r = new java.awt.geom.Rectangle2D.Float(0, 0, preferredSize.width, preferredSize.height); g2.setPaint(Color.white); g2.fill(r); Vector page = (Vector) pageVector.elementAt(currentPageIndex); g2.setFont(font); g2.setPaint(Color.black); float x = 0; float y = fontSize; for (int i = 0; i 0) g2.drawString(line, (int) x, (int) y); y += fontSize; public int print(Graphics g, PageFormat pageFormat, int pageIndex) if (pageIndex = pageVector.size() return NO_SUCH_PAGE; int savedPage = currentPageIndex; currentPageIndex = pageIndex; Graphics2D g2 = (Graphics2D) g; g2.translate(pageFormat.getImageableX(), pageFormat.getImageableY(); paint(g2); currentPageIndex = savedPage; return PAGE_EXISTS; public Dimension getPreferredSize() return preferredSize; public int getCurrentPage() return currentPageIndex; public int getNumPages() return pageVector.size(); public void nextPage() if (currentPageIndex 0) currentPageIndex-; repaint(); 【PrintPreview.java】的源码：import java.awt.BorderLayout;import java.awt.Color;import java.awt.Component;import java.awt.Cursor;import java.awt.Dimension;import java.awt.Graphics;import java.awt.Image;import java.awt.Insets;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.image.BufferedImage;import java.awt.print.PageFormat;import java.awt.print.Printable;import java.awt.print.PrinterException;import java.awt.print.PrinterJob;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JComboBox;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JToolBar;import javax.swing.border.MatteBorder;public class PrintPreview extends JFrame private static final long serialVersionUID = 1L; protected int m_wPage; protected int m_hPage; protected int m_orientation; protected Printable m_target; protected JComboBox m_cbScale; protected PreviewContainer m_preview; public PrintPreview(Printable target) this(target, Print Preview , PageFormat.PORTRAIT); public PrintPreview(Printable target, String title, int orientation) super(title); setSize(600, 400); getContentPane().setLayout(new BorderLayout(); m_target = target; m_orientation = orientation; JToolBar tb = new JToolBar(); JButton bt = new JButton(Print , new ImageIcon(print.gif ); ActionListener lst = new ActionListener() public void actionPerformed(ActionEvent e) try PrinterJob prnJob = PrinterJob.getPrinterJob(); PageFormat pageFormat = prnJob.defaultPage(); pageFormat.setOrientation(m_orientation); prnJob.setPrintable(m_target, pageFormat); if (!prnJob.printDialog() return; setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR); prnJob.print(); setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR); dispose(); catch (PrinterException ex) ex.printStackTrace(); System.err.println(Printing error: + ex.toString(); ; bt.addActionListener(lst); bt.setAlignmentY(0.5f); bt.setMargin(new Insets(4, 6, 4, 6); tb.add(bt); bt = new JButton(Close ); lst = new ActionListener() public void actionPerformed(ActionEvent e) dispose(); ; bt.addActionListener(lst); bt.setAlignmentY(0.5f); bt.setMargin(new Insets(2, 6, 2, 6); tb.add(bt); String scales = 10%, 25%, 50%, 100% ; m_cbScale = new JComboBox(scales); lst = new ActionListener() public void actionPerformed(ActionEvent e) String str = m_cbScale.getSelectedItem().toString(); if (str.endsWith(%) str = str.substring(0, str.length() - 1); str = str.trim(); int scale = 0; try scale = Integer.parseInt(str); catch (NumberFormatException ex) return; int w = (int) (m_wPage * scale / 100); int h = (int) (m_hPage * scale / 100); Component comps = m_preview.getComponents(); for (int k = 0; k comps.length; k+) if (!(compsk instanceof PagePreview) continue; PagePreview pp = (PagePreview) compsk; pp.setScaledSize(w, h); m_preview.doLayout(); m_preview.getParent().getParent().validate(); ; m_cbScale.addActionListener(lst); m_cbScale.setMaximumSize(m_cbScale.getPreferredSize(); m_cbScale.setEditable(true); tb.addSeparator(); tb.add(m_cbScale); getContentPane().add(tb, BorderLayout.NORTH); m_preview = new PreviewContainer(); PrinterJob prnJob = PrinterJob.getPrinterJob(); PageFormat pageFormat = prnJob.defaultPage(); pageFormat.setOrientation(m_orientation); if (pageFormat.getHeight() = 0 | pageFormat.getWidth() = 0) System.err.println(Unable to determine default page size ); return; m_wPage = (int) (pageFormat.getWidth(); m_hPage = (int) (pageFormat.getHeight(); int scale = 10; int w = (int) (m_wPage * scale / 100); int h = (int) (m_hPage * scale / 100); int pageIndex = 0; try while (true) BufferedImage img = new BufferedImage(m_wPage, m_hPage, BufferedImage.TYPE_INT_RGB); Graphics g = img.getGraphics(); g.setColor(Color.white); g.fillRect(0, 0, m_wPage, m_hPage); if (target.print(