打印java应用程序的界面.可以指定是这个界面中的任何一个组件.

今天组长说要打印FSI系统的界面.我上叫我research下先.我google下看了别人的文章写了下面这个工具类.

/*
* Created on 2005-3-23
*/
package com.dengyin.awt.printutils;
import java.awt.Component;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.PrintJob;
import java.awt.Toolkit;
import java.util.Properties;
/**
* PrintUtil用于打印一个java应用程序(Frame)或是这个应用程序中的某个组件(Component)的界面.
* 它不适用于打印文本,它的作用相当于先截取一个java应用程序(Frame)或是这个应用程序中的某个组
* 件(Component)的图像,然后用打印机打印出来.
*
* 我写这个类时主要是参照了这篇文章
*
* @see <a
* href="http://www-900.ibm.com/developerWorks/cn/java/l-javaprint/index.shtml">Java打印程序设计
* </a>
* @see java.awt.PrintJob
* @version 0.1 2005-3-23
* @author 邓胤
*/
public class PrintUtil {
/**
*
* @param frame
* java应用程序的主Frame
* @param com
* 你想打印的在主Frame中的组件(可以是任何继承java.awt.Component的类型)
*/
public static void print(Frame frame, Component com) {
Toolkit kit = Toolkit.getDefaultToolkit(); //获取工具箱
Properties props = new Properties();
props.put("awt.print.printer", "durango");//设置打印属性
props.put("awt.print.numCopies", "2");
if (kit != null) {
//获取工具箱自带的打印对象
PrintJob printJob = kit.getPrintJob(frame, "Print Frame", props);
if (printJob != null) {
Graphics pg = printJob.getGraphics();//获取打印对象的图形环境
if (pg != null) {
try {
com.printAll(pg);//打印该窗体及其所有的组件
} finally {
pg.dispose();//注销图形环境
}
}
printJob.end();//结束打印作业
}
}
}
/**
* 这个方法依赖于PrintPreviewDialog
*
* @param frame
* java应用程序的主Frame
* @param com
* 你想预览打印的在主Frame中的组件(可以是任何继承java.awt.Component的类型)
*/
public static void printPreview(Frame frame, Component com) {
PrintPreviewDialog pd = new PrintPreviewDialog(frame, "print preview",
true, com);
pd.setSize(400, 600);
pd.setVisible(true);
}
}

package com.dengyin.awt.printutils;
import java.awt.event.*;
import java.awt.*;
import java.awt.print.*;
import javax.swing.*;
import com.szallcom.tools.SystemProperties;
import java.awt.geom.*;
/**
* 我只是将网上的这个例子拿下来改了改 详情请见
*
* @see <a
* href="http://www-900.ibm.com/developerWorks/cn/java/l-javaprint/index.shtml">Java打印程序设计
* </a>
* @author 邓胤
*/
public class PrintPreviewDialog extends JDialog implements ActionListener {
private JButton closeButton = new JButton("Close");
private JButton printButton = new JButton("Ok! I want to print now.");
private JPanel buttonPanel = new JPanel();
private PreviewCanvas canvas;
private Frame parent;
private Component com;
public PrintPreviewDialog(Frame parent, String title, boolean modal,
Component pt) {
super(parent, title, modal);
this.parent = parent;
this.com = pt;
canvas = new PreviewCanvas(pt);
setLayout();
}
private void setLayout() {
this.getContentPane().setLayout(new BorderLayout());
this.getContentPane().add(canvas, BorderLayout.CENTER);
closeButton.setMnemonic('N');
closeButton.addActionListener(this);
printButton.setMnemonic('N');
printButton.addActionListener(this);
buttonPanel.add(closeButton);
buttonPanel.add(printButton);
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 == closeButton)
closeAction();
else if (src == printButton)
printNow();
}
private void printNow() {
PrintUtil.print(parent, com);
}
private void closeAction() {
this.setVisible(false);
this.dispose();
}
class PreviewCanvas extends JPanel {
private int currentPage = 0;
private Component preview;
public PreviewCanvas(Component pt) {
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);
preview.print(g2);
}
}
}

详情请见http://www-900.ibm.com/developerWorks/cn/java/l-javaprint/index.shtml

上面实现的当窗体宽度大于纸张的宽度时.只能打印出一部分.
经过自己的东拼西凑自己解决了这个问题.

/*
* Created on 2005-3-23
*/
package com.fsillc.print.test;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.PrintJob;
import java.awt.Toolkit;
import java.awt.geom.AffineTransform;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.util.Properties;
/**
* PrintUtil用于打印一个java应用程序(Frame)或是这个应用程序中的某个组件(Component)的界面.
* 它不适用于打印文本,它的作用相当于先截取一个java应用程序(Frame)或是这个应用程序中的某个组
* 件(Component)的图像,然后用打印机打印出来.
*
* 我写这个类时主要是参照了这篇文章
*
* @see <a
* href="http://www-900.ibm.com/developerWorks/cn/java/l-javaprint/index.shtml">Java打印程序设计
* </a>
* @see java.awt.PrintJob
* @version 0.1 2005-3-23
* @author 邓胤
*/
public abstract class PrintUtil implements Printable{
/**
*
* @param frame
* java应用程序的主Frame
* @param com
* 你想打印的在主Frame中的组件(可以是任何继承java.awt.Component的类型)
*/
public static void print(Component com) {
/*
* Toolkit kit = Toolkit.getDefaultToolkit(); //获取工具箱 Properties props =
* new Properties(); props.put("awt.print.printer", "durango");//设置打印属性
* props.put("awt.print.numCopies", "2"); if (kit != null) {
* //获取工具箱自带的打印对象 PrintJob printJob = kit.getPrintJob(frame, "Print
* Frame", props); if (printJob != null) { Graphics pg =
* printJob.getGraphics();//获取打印对象的图形环境
*
* if (pg != null) { try { com.printAll(pg);//打印该窗体及其所有的组件 } finally {
* pg.dispose();//注销图形环境 } } printJob.end();//结束打印作业 } }
*/
PrinterJob job = PrinterJob.getPrinterJob();
job.setJobName("Maxim 1");
job.setPrintable((Printable) com);
try {
job.print();
} catch (PrinterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 这个方法依赖于PrintPreviewDialog
*
* @param frame
* java应用程序的主Frame
* @param com
* 你想预览打印的在主Frame中的组件(可以是任何继承java.awt.Component的类型)
*/
public static void printPreview(Frame p,Component com) {
PrintPreviewDialog pd = new PrintPreviewDialog(p,"print Preview",true,com);
pd.setSize(800, 600);
pd.setVisible(true);
}
public static int printAble(Component c,Graphics g,PageFormat pageFormat,int pageIndex){
if (pageIndex == 0) {
// this.setSize((int) pageFormat.getImageableWidth(), (int) pageFormat
// .getImageableHeight());
// this.validate();
// g.translate((int) pageFormat.getImageableX(), (int) pageFormat
// .getImageableY());
// this.printAll(g);
// return PAGE_EXISTS;
Dimension prefSize = c.getPreferredSize();
c.setSize(prefSize);
c.validate();
double ratio = pageFormat.getImageableWidth() / prefSize.width;
Graphics2D g2d = (Graphics2D) g;
// translate origin toimageable origin
g2d.transform(AffineTransform.getTranslateInstance(pageFormat
.getImageableX(), pageFormat.getImageableY()));
// // scale output
g2d.transform(AffineTransform.getScaleInstance(ratio, ratio));
c.printAll(g2d);
return PAGE_EXISTS;
}
return NO_SUCH_PAGE;

}

}

package com.fsillc.print.test;
import java.awt.event.*;
import java.awt.*;
import java.awt.print.*;
import javax.swing.*;
import java.awt.geom.*;
public class PrintPreviewDialog extends JDialog
implements ActionListener
{
private JButton closeButton = new JButton("Close");
private JButton printButton = new JButton("Ok! I want to print the current tab.");
private JPanel buttonPanel = new JPanel();
private PreviewCanvas canvas;
private Component c;
public PrintPreviewDialog(Frame parent, String title, boolean modal, Component pt)
{
super(parent, title, modal);
this.c = pt;
canvas = new PreviewCanvas(pt);
setLayout();
}
private void setLayout()
{
this.getContentPane().setLayout(new BorderLayout());
this.getContentPane().add(canvas, BorderLayout.CENTER);

closeButton.setMnemonic('N');
closeButton.addActionListener(this);

printButton.setMnemonic('N');
printButton.addActionListener(this);

buttonPanel.add(closeButton);
buttonPanel.add(printButton);

this.getContentPane().add(buttonPanel, BorderLayout.SOUTH);
this.setBounds((int)((Toolkit.getDefaultToolkit().getScreenSize().width - 400) / 2), (int)((Toolkit.getDefaultToolkit().getScreenSize().height - 400) / 2), 400, 400);
}
public void actionPerformed(ActionEvent evt)
{
Object src = evt.getSource();
if (src == closeButton)
closeAction();
else if (src==printButton)
PrintUtil.print(c);
}
private void closeAction()
{
this.setVisible(false);
this.dispose();
}

class PreviewCanvas extends JPanel
{

private int currentPage = 0;
private Component preview;
public PreviewCanvas(Component pt)
{
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
{
((Printable)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));
}
}
}
}

/*
* Created on 2005-3-23
*/
package com.fsillc.print.test;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
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 javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

/**
* @author 邓胤
*/
public class PrintTest extends JFrame implements Printable {
private JTextField txt1;
private JLabel lab1;
private JButton button;
private JButton button1;
private void printFrame(){
PrintUtil.print(this);

}
private void previewFrame(){
PrintUtil.printPreview(this,this);
}
/**
* @param title
* @throws java.awt.HeadlessException
*/
public PrintTest(String title) throws HeadlessException {
super(title);
this.addWindowListener(new WindowsListener());
txt1 = new JTextField("dafadsfads");
lab1 = new JLabel("dsafad");
button = new JButton("print!");
button1 = new JButton("preview");
Container c = this.getContentPane();

c.setLayout(new FlowLayout());
c.add(txt1);
c.add(lab1);
c.add(button);
c.add(button1);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
printFrame();
}
});

button1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
previewFrame();

}
});
}
public int print(Graphics graphics, PageFormat pageFormat, int pageIndex)
throws PrinterException {
return PrintUtil.printAble(this,graphics,pageFormat,pageIndex);
}
public static void main(String[] args) {
JFrame f = new PrintTest("Print me!");
f.setSize(600, 400);
f.setVisible(true);
}
private class WindowsListener extends WindowAdapter {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
}
}

运行这个test看效果.