最近項目中要用到java swing 顯示pdf,帶放大縮小及打印功能，經過一天的網絡搜索及api查看終於完成，下公佈代碼如下
CustomImgPanel.java用來加載pdf轉換後的image
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.merchantrunglobal.image.panel;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
/**
*
* @author admin
*/
public class CustomImgPanel extends javax.swing.JPanel {
private int width = 0;
private int height = 0;
Image image;
/**
*
* @param _width 整型,窗口的寬度
* @param _height 整型,窗口的高度
* @param _imgPath 圖片的URL,可用相對路徑
*/
public CustomImgPanel(int _width, int _height, Image _image) {
width = _width;
height = _height;
image = _image;
setSize(width, height);
setVisible(true);
}
/**
*
* @param _width 浮點型,窗口的寬度
* @param _height 浮點型,窗口的高度
* @param _imgPath 字符串,圖片的URL,可用相對
*/
public CustomImgPanel(double _width, double _height, Image _image) {
width = (int) _width;
height = (int) _height;
image = _image;
setSize(width, height);
setVisible(true);
}
@Override
public void paintComponent(Graphics gs) {
Graphics2D g = (Graphics2D) gs;
super.paintComponent(g);
g.drawImage(image, 0, 0, width, height, this);
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 300, Short.MAX_VALUE)
);
}// </editor-fold>
// Variables declaration - do not modify
// End of variables declaration
}
ShowJFrame.java主運行類,用來加載滾動條，放大縮小及打印。
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.merchantrunglobal.image.panel;
import java.awt.Dimension;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.print.Doc;
import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.PrintException;
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.ServiceUI;
import javax.print.SimpleDoc;
import javax.print.attribute.DocAttributeSet;
import javax.print.attribute.HashDocAttributeSet;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.standard.MediaSizeName;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
/**
*
* @author admin
*/
public class ShowJFrame extends javax.swing.JFrame {
CustomImgPanel imgPanel;
int level;
String pdfFilePath = "pdf/tests.pdf";
/**
* Creates new form ShowJFrame
*/
public ShowJFrame() {
initComponents();
level = 3;
imgPanel = new CustomImgPanel(714, 1011, pdfToImg(pdfFilePath));
imgPanel.setPreferredSize(new Dimension(714, 1011));
mainScrollPanel.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
mainScrollPanel.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
mainScrollPanel.setViewportView(imgPanel);
this.setLayout(null);
this.setVisible(true);
this.Enlarge.setVisible(true);
this.narrow.setVisible(true);
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
narrow = new javax.swing.JButton();
Enlarge = new javax.swing.JButton();
mainScrollPanel = new javax.swing.JScrollPane();
print = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
narrow.setText("縮小");
narrow.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
narrowActionPerformed(evt);
}
});
Enlarge.setText("放大");
Enlarge.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
EnlargeActionPerformed(evt);
}
});
print.setText("打印");
print.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
printActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(59, 59, 59)
.addComponent(narrow)
.addGap(128, 128, 128)
.addComponent(Enlarge)
.addGap(103, 103, 103)
.addComponent(print)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addComponent(mainScrollPanel, javax.swing.GroupLayout.PREFERRED_SIZE, 619, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 0, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(mainScrollPanel, javax.swing.GroupLayout.DEFAULT_SIZE, 475, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(narrow)
.addComponent(Enlarge)
.addComponent(print))
.addContainerGap())
);
pack();
}// </editor-fold>
private void narrowActionPerformed(java.awt.event.ActionEvent evt) {
mainScrollPanel.remove(imgPanel);
if (level > 1) {
level--;
Map<String, Integer> map = getWidthHeight(level);
imgPanel = new CustomImgPanel(map.get("width").intValue(), map.get("height").intValue(), pdfToImg(pdfFilePath));
imgPanel.setPreferredSize(new Dimension(map.get("width").intValue(), map.get("height").intValue()));
imgPanel.repaint();
mainScrollPanel.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
mainScrollPanel.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
mainScrollPanel.setViewportView(imgPanel);
} else {
JOptionPane.showMessageDialog(this, "已經到最小了！");
}
}
private void EnlargeActionPerformed(java.awt.event.ActionEvent evt) {
mainScrollPanel.remove(imgPanel);
if (level < 5) {
level++;
Map<String, Integer> map = getWidthHeight(level);
imgPanel = new CustomImgPanel(map.get("width").intValue(), map.get("height").intValue(), pdfToImg(pdfFilePath));
imgPanel.setPreferredSize(new Dimension(map.get("width").intValue(), map.get("height").intValue()));
imgPanel.repaint();
mainScrollPanel.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
mainScrollPanel.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
mainScrollPanel.setViewportView(imgPanel);
} else {
JOptionPane.showMessageDialog(this, "已經到最大了！");
}
}
private void printActionPerformed(java.awt.event.ActionEvent evt) {
PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();
DocFlavor flavor = DocFlavor.INPUT_STREAM.PDF;
PrintService printService[] = PrintServiceLookup.lookupPrintServices(
flavor, pras);
PrintService defaultService = PrintServiceLookup.lookupDefaultPrintService();
PrintService service = ServiceUI.printDialog(null, 200, 200,
printService, defaultService, flavor, pras);
if (service != null) {
FileInputStream fis = null;
try {
DocPrintJob job = service.createPrintJob();
fis = new FileInputStream(pdfFilePath);
pras.add(MediaSizeName.ISO_A4);
DocAttributeSet das = new HashDocAttributeSet();
Doc doc = new SimpleDoc(fis, flavor, das);
job.print(doc, pras);
Thread.sleep(10000);
} catch (InterruptedException ex) {
Logger.getLogger(ShowJFrame.class.getName()).log(Level.SEVERE, null, ex);
} catch (PrintException ex) {
Logger.getLogger(ShowJFrame.class.getName()).log(Level.SEVERE, null, ex);
} catch (FileNotFoundException ex) {
Logger.getLogger(ShowJFrame.class.getName()).log(Level.SEVERE, null, ex);
} finally {
try {
fis.close();
} catch (IOException ex) {
Logger.getLogger(ShowJFrame.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(ShowJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(ShowJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(ShowJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(ShowJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new ShowJFrame().setVisible(true);
}
});
}
public Map<String, Integer> getWidthHeight(int level) {
Map<String, Integer> map = new HashMap<String, Integer>();
if (level == 1) {
map.put("width", new Integer("238"));
map.put("height", new Integer("337"));
} else if (level == 2) {
map.put("width", new Integer("476"));
map.put("height", new Integer("674"));
} else if (level == 3) {
map.put("width", new Integer("714"));
map.put("height", new Integer("1011"));
} else if (level == 4) {
map.put("width", new Integer("952"));
map.put("height", new Integer("1439"));
} else if (level == 5) {
map.put("width", new Integer("1190"));
map.put("height", new Integer("1684"));
}
return map;
}
public static Image pdfToImg(String pdfFileName) {
ImageIcon imageIcon = null;
try {
PDDocument doc = PDDocument.load(pdfFileName);
int pageCount = doc.getNumberOfPages();
System.out.println(pageCount);
PDPage page = (PDPage) doc.getDocumentCatalog().getAllPages().get(0);
BufferedImage bufferedImage = page.convertToImage();
if (bufferedImage != null) {
imageIcon = new ImageIcon(Toolkit.getDefaultToolkit().createImage(bufferedImage.getSource()));
}
doc.close();
System.out.println("over");
} catch (IOException ex) {
Logger.getLogger(ShowJFrame.class.getName()).log(Level.SEVERE, null, ex);
}
return imageIcon.getImage();
}
// Variables declaration - do not modify
private javax.swing.JButton Enlarge;
private javax.swing.JScrollPane mainScrollPanel;
private javax.swing.JButton narrow;
private javax.swing.JButton print;
// End of variables declaration
}