import java.io.*;public class SimplePrinting
{
public static void main(String args[])
{
try{
FileWriter out = new FileWriter("lpt1");
out.write("Hello world!");
out.write(0x0c);//CR
out.close();
}catch(IOException e){
e.printStackTrace();
}
}
}
{
public static void main(String args[])
{
try{
FileWriter out = new FileWriter("lpt1");
out.write("Hello world!");
out.write(0x0c);//CR
out.close();
}catch(IOException e){
e.printStackTrace();
}
}
}
在FileWriter("lpt1")是调用端口号吗？
import java.awt.event.*;
public class print
{public static void main(String args[])
{ MyFrame f=new MyFrame();
f.setBounds(70,70,70,89);
f.setVisible(true);f.pack();
}
}
class MyFrame extends Frame implements ActionListener
{ PrintJob p=null; //声明一个PrintJob对象。
Graphics g=null;
TextArea text=new TextArea(10,10);
Button 打印文本框=new Button("打印文本框"),
打印窗口=new Button("打印窗口"),
打印按扭=new Button("打印按扭");
MyFrame()
{ super("在应用程序中打印");
打印文本框.addActionListener(this);
打印窗口.addActionListener(this);
打印按扭.addActionListener(this);
add(text,"Center");
Panel panel=new Panel();
panel.add(打印文本框); panel.add(打印窗口); panel.add(打印按扭);
add(panel,"South");
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0); }
});
}
public void actionPerformed(ActionEvent e)
{ if(e.getSource()==打印文本框)
{ p=getToolkit().getPrintJob(this,"ok",null);
//创建一个PrintJob对象p 。
g=p.getGraphics(); //p获取一个用于打印的 Graphics对象。
g.translate(120,200);
text.printAll(g);
g.dispose(); //释放对象 g。
p.end();
}
else if(e.getSource()==打印窗口)
{ p=getToolkit().getPrintJob(this,"ok",null);
g=p.getGraphics(); //p获取一个用于打印的 Graphics对象。
g.translate(120,200);
this.printAll(g); //打印当前窗口及其子组件。
g.dispose(); //释放对象 g。
p.end();
}
else if(e.getSource()==打印按扭)
{ p=getToolkit().getPrintJob(this,"ok",null);
g=p.getGraphics();
g.translate(120,200); //在打印页的坐标(120,200)处打印第一个"按扭"。
打印文本框.printAll(g);
g.translate(78,0); //在打印页的坐标(198,200)处打印第二个"按扭"。
打印窗口.printAll(g);
g.translate(66,0); //在打印页的坐标(264,200)处打印第三个"按扭"。
打印按扭.printAll(g);
g.dispose();
p.end();
}
}
}
打印预览：
package com.szallcom.tools;import java.awt.event.*;
import java.awt.*;
import java.awt.print.*;
import javax.swing.*;
import wf.common.SystemProperties;
import java.awt.geom.*;public class PrintPreviewDialog extends JDialog
implements ActionListener
{
private JButton nextButton = new JButton("Next");
private JButton previousButton = new JButton("Previous");
private JButton closeButton = new JButton("Close");
private JPanel buttonPanel = new JPanel();
private PreviewCanvas canvas; public PrintPreviewDialog(Frame parent, String title, boolean modal, PrintTest pt, String str)
{
super(parent, title, modal);
canvas = new PreviewCanvas(pt, str);
setLayout();
} private void setLayout()
{
this.getContentPane().setLayout(new BorderLayout());
this.getContentPane().add(canvas, BorderLayout.CENTER); nextButton.setMnemonic('N');
nextButton.addActionListener(this);
buttonPanel.add(nextButton);
previousButton.setMnemonic('N');
previousButton.addActionListener(this);
buttonPanel.add(previousButton);
closeButton.setMnemonic('N');
closeButton.addActionListener(this);
buttonPanel.add(closeButton);
this.getContentPane().add(buttonPanel, BorderLayout.SOUTH);
this.setBounds((int)((SystemProperties.SCREEN_WIDTH - 400) / 2), (int)((SystemProperties.SCREEN_HEIGHT - 400) / 2), 400, 400);
} public void actionPerformed(ActionEvent evt)
{
Object src = evt.getSource();
if (src == nextButton)
nextAction();
else if (src == previousButton)
previousAction();
else if (src == closeButton)
closeAction();
} private void closeAction()
{
this.setVisible(false);
this.dispose();
} private void nextAction()
{
canvas.viewPage(1);
} private void previousAction()
{
canvas.viewPage(-1);
} class PreviewCanvas extends JPanel
{
private String printStr;
private int currentPage = 0;
private PrintTest preview; public PreviewCanvas(PrintTest pt, String str)
{
printStr = str;
preview = pt;
} public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
PageFormat pf = PrinterJob.getPrinterJob().defaultPage(); double xoff;
double yoff;
double scale;
double px = pf.getWidth();
double py = pf.getHeight();
double sx = getWidth() - 1;
double sy = getHeight() - 1;
if (px / py < sx / sy)
{
scale = sy / py;
xoff = 0.5 * (sx - scale * px);
yoff = 0;
}
else
{
scale = sx / px;
xoff = 0;
yoff = 0.5 * (sy - scale * py);
}
g2.translate((float)xoff, (float)yoff);
g2.scale((float)scale, (float)scale); Rectangle2D page = new Rectangle2D.Double(0, 0, px, py);
g2.setPaint(Color.white);
g2.fill(page);
g2.setPaint(Color.black);
g2.draw(page); try
{
preview.print(g2, pf, currentPage);
}
catch(PrinterException pe)
{
g2.draw(new Line2D.Double(0, 0, px, py));
g2.draw(new Line2D.Double(0, px, 0, py));
}
} public void viewPage(int pos)
{
int newPage = currentPage + pos;
if (0 <= newPage && newPage < preview.getPagesCount(printStr))
{
currentPage = newPage;
repaint();
}
}
}
}
import wf.common.SystemProperties;
import javax.print.*;
import javax.print.attribute.*;
import java.io.*;public class PrintTest extends JFrame
implements ActionListener, Printable
{
private JButton printTextButton = new JButton("Print Text");
private JButton previewButton = new JButton("Print Preview");
private JButton printText2Button = new JButton("Print Text2");
private JButton printFileButton = new JButton("Print File");
private JButton printFrameButton = new JButton("Print Frame");
private JButton exitButton = new JButton("Exit");
private JLabel tipLabel = new JLabel("");
private JTextArea area = new JTextArea();
private JScrollPane scroll = new JScrollPane(area);
private JPanel buttonPanel = new JPanel(); private int PAGES = 0;
private String printStr; public PrintTest()
{
this.setTitle("Print Test");
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setBounds((int)((SystemProperties.SCREEN_WIDTH - 800) / 2), (int)((SystemProperties.SCREEN_HEIGHT - 600) / 2), 800, 600);
initLayout();
} private void initLayout()
{
this.getContentPane().setLayout(new BorderLayout());
this.getContentPane().add(scroll, BorderLayout.CENTER);
printTextButton.setMnemonic('P');
printTextButton.addActionListener(this);
buttonPanel.add(printTextButton);
previewButton.setMnemonic('v');
previewButton.addActionListener(this);
buttonPanel.add(previewButton);
printText2Button.setMnemonic('e');
printText2Button.addActionListener(this);
buttonPanel.add(printText2Button);
printFileButton.setMnemonic('i');
printFileButton.addActionListener(this);
buttonPanel.add(printFileButton);
printFrameButton.setMnemonic('F');
printFrameButton.addActionListener(this);
buttonPanel.add(printFrameButton);
exitButton.setMnemonic('x');
exitButton.addActionListener(this);
buttonPanel.add(exitButton);
this.getContentPane().add(buttonPanel, BorderLayout.SOUTH);
} public void actionPerformed(ActionEvent evt)
{
Object src = evt.getSource();
if (src == printTextButton)
printTextAction();
else if (src == previewButton)
previewAction();
else if (src == printText2Button)
printText2Action();
else if (src == printFileButton)
printFileAction();
else if (src == printFrameButton)
printFrameAction();
else if (src == exitButton)
exitApp();
} public int print(Graphics g, PageFormat pf, int page) throws PrinterException
{
Graphics2D g2 = (Graphics2D)g;
g2.setPaint(Color.black);
if (page >= PAGES)
return Printable.NO_SUCH_PAGE;
g2.translate(pf.getImageableX(), pf.getImageableY());
drawCurrentPageText(g2, pf, page);
return Printable.PAGE_EXISTS;
} private void drawCurrentPageText(Graphics2D g2, PageFormat pf, int page)
{
Font f = area.getFont();
String s = getDrawText(printStr)[page];
String drawText;
float ascent = 16;
int k, i = f.getSize(), lines = 0;
while(s.length() > 0 && lines < 54)
{
k = s.indexOf('\n');
if (k != -1)
{
lines += 1;
drawText = s.substring(0, k);
g2.drawString(drawText, 0, ascent);
if (s.substring(k + 1).length() > 0)
{
s = s.substring(k + 1);
ascent += i;
}
}
else
{
lines += 1;
drawText = s;
g2.drawString(drawText, 0, ascent);
s = "";
}
}
}
{
String[] drawText = new String[PAGES];
for (int i = 0; i < PAGES; i++)
drawText[i] = ""; int k, suffix = 0, lines = 0;
while(s.length() > 0)
{
if(lines < 54)
{
k = s.indexOf('\n');
if (k != -1)
{
lines += 1;
drawText[suffix] = drawText[suffix] + s.substring(0, k + 1);
if (s.substring(k + 1).length() > 0)
s = s.substring(k + 1);
}
else
{
lines += 1;
drawText[suffix] = drawText[suffix] + s;
s = "";
}
}
else
{
lines = 0;
suffix++;
}
}
return drawText;
} public int getPagesCount(String curStr)
{
int page = 0;
int position, count = 0;
String str = curStr;
while(str.length() > 0)
{
position = str.indexOf('\n');
count += 1;
if (position != -1)
str = str.substring(position + 1);
else
str = "";
} if (count > 0)
page = count / 54 + 1; return page;
} private void printTextAction()
{
printStr = area.getText().trim();
if (printStr != null && printStr.length() > 0)
{
PAGES = getPagesCount(printStr);
PrinterJob myPrtJob = PrinterJob.getPrinterJob();
PageFormat pageFormat = myPrtJob.defaultPage();
myPrtJob.setPrintable(this, pageFormat);
if (myPrtJob.printDialog())
{
try
{
myPrtJob.print();
}
catch(PrinterException pe)
{
pe.printStackTrace();
}
}
}
else
{
JOptionPane.showConfirmDialog(null, "Sorry, Printer Job is Empty, Print Cancelled!", "Empty"
, JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE);
}
} private void previewAction()
{
printStr = area.getText().trim();
PAGES = getPagesCount(printStr);
(new PrintPreviewDialog(this, "Print Preview", true, this, printStr)).setVisible(true);
} private void printText2Action()
{
printStr = area.getText().trim();
if (printStr != null && printStr.length() > 0)
{
PAGES = getPagesCount(printStr);
DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;
PrintService printService = PrintServiceLookup.lookupDefaultPrintService();
DocPrintJob job = printService.createPrintJob();
PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();
DocAttributeSet das = new HashDocAttributeSet();
Doc doc = new SimpleDoc(this, flavor, das); try
{
job.print(doc, pras);
}
catch(PrintException pe)
{
pe.printStackTrace();
}
}
else
{
JOptionPane.showConfirmDialog(null, "Sorry, Printer Job is Empty, Print Cancelled!", "Empty"
, JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE);
}
} private void printFileAction()
{
JFileChooser fileChooser = new JFileChooser(SystemProperties.USER_DIR);
fileChooser.setFileFilter(new com.szallcom.file.JavaFilter());
int state = fileChooser.showOpenDialog(this);
if (state == fileChooser.APPROVE_OPTION)
{
File file = fileChooser.getSelectedFile();
PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();
DocFlavor flavor = DocFlavor.INPUT_STREAM.AUTOSENSE;
PrintService printService[] = PrintServiceLookup.lookupPrintServices(flavor, pras);
PrintService defaultService = PrintServiceLookup.lookupDefaultPrintService();
PrintService service = ServiceUI.printDialog(null, 200, 200, printService
, defaultService, flavor, pras);
if (service != null)
{
try
{
DocPrintJob job = service.createPrintJob();
FileInputStream fis = new FileInputStream(file);
DocAttributeSet das = new HashDocAttributeSet();
Doc doc = new SimpleDoc(fis, flavor, das);
job.print(doc, pras);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
} private void printFrameAction()
{
Toolkit kit = Toolkit.getDefaultToolkit();
Properties props = new Properties();
props.put("awt.print.printer", "durango");
props.put("awt.print.numCopies", "2");
if(kit != null)
{
PrintJob printJob = kit.getPrintJob(this, "Print Frame", props);
if(printJob != null)
{
Graphics pg = printJob.getGraphics();
if(pg != null)
{
try
{
this.printAll(pg);
}
finally
{
pg.dispose();
}
}
printJob.end();
}
}
} private void exitApp()
{
this.setVisible(false);
this.dispose();
System.exit(0);
} public static void main(String[] args)
{
(new PrintTest()).setVisible(true);
}
}
public class Test{
//本地打印方法，在外部实现
public native void testprint(); static{
System.loadLibrary("本地资源");
}
public static void main(String[] args){
new Test().testprint();
}
}