Hi,
I am using Applet as an interface for HP SCANNER using the following jar file namely apple.jar.
I converted the following SaneAppletExample.java as apple.jar.
I found the below error while accessing the jsp file through browser. The applet does not support with the following error in the console.
I gone through more web sites for giving access to the jar file.
Thanks to help in this regards.
Thanks and regards,
S.P.Kannan.
Error Message:_
java.security.AccessControlException: access denied (java.util.PropertyPermission user.home read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPropertyAccess(Unknown Source)
at java.lang.System.getProperty(Unknown Source)
at uk.co.mmscomputing.device.sane.applet.SaneAppletExample.init(SaneAppletExample.java:65)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
SaneAppletExample.java._
package uk.co.mmscomputing.device.sane.applet;
import java.awt.Button;
import java.awt.GridLayout;
import java.applet.Applet;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import uk.co.mmscomputing.device.scanner.Scanner;
import uk.co.mmscomputing.device.scanner.ScannerDevice;
import uk.co.mmscomputing.device.scanner.ScannerListener;
import uk.co.mmscomputing.device.scanner.ScannerIOMetadata;
import uk.co.mmscomputing.device.scanner.ScannerIOException;
import javax.swing.JFrame;
public class SaneAppletExample extends Applet implements ActionListener, ScannerListener{
String filename;
Scanner scanner;
Button acquireButton,selectButton,cancelButton;
public SaneAppletExample(){}
public SaneAppletExample(String title, String[] argv){
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame=new JFrame(title);
// frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent ev) {
stop();System.exit(0);
}
});
init();
frame.getContentPane().add(this);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
start();
}
public void init(){
setLayout(new GridLayout(1,3));
selectButton = new Button("select");
add(selectButton);
selectButton.addActionListener(this);
acquireButton = new Button("acquire");
add(acquireButton);
acquireButton.addActionListener(this);
cancelButton = new Button("cancel next scan");
add(cancelButton);
cancelButton.addActionListener(this);
filename=System.getProperty("user.home")+"/test.jpg"; <---- Line No.65
scanner=Scanner.getDevice();
scanner.addListener(this);
}
public void actionPerformed(ActionEvent evt){
try{
if(evt.getSource()==acquireButton){
scanner.acquire();
}else if(evt.getSource()==selectButton){
scanner.select();
}else if(evt.getSource()==cancelButton){
scanner.setCancel(true);
}
}catch(ScannerIOException sioe){
sioe.printStackTrace();
}
}
public void update(ScannerIOMetadata.Type type, ScannerIOMetadata metadata){
if(type.equals(ScannerIOMetadata.ACQUIRED)){
BufferedImage image=metadata.getImage();
System.out.println("Have an image now!");
try{
File file = new File(filename);
System.out.println("Image Path: "+file.getAbsolutePath());
ImageIO.write(image, "jpg", file);
}catch(Exception e){
e.printStackTrace();
}
}else if(type.equals(ScannerIOMetadata.NEGOTIATE)){
ScannerDevice device=metadata.getDevice();
/*
try{
// device.setShowUserInterface(false);
device.setShowProgressBar(true);
device.setRegionOfInterest(20,40,300,200);
device.setResolution(100.0);
}catch(Exception e){
e.printStackTrace();
}
*/
}else if(type.equals(ScannerIOMetadata.STATECHANGE)){
System.err.println(metadata.getStateStr());
}else if(type.equals(ScannerIOMetadata.EXCEPTION)){
metadata.getException().printStackTrace();
}
}
public static void main(String[] argv){
try{
SaneAppletExample app = new SaneAppletExample("Sane Applet Example [2007-11-19]", argv);
}catch(Exception e){
e.printStackTrace();
}
}
}
JSP FILE:
<table>
<tr>
<td>
<APPLET CODE ="uk.co.mmscomputing.device.sane.applet.SaneAppletExample" ARCHIVE="apple.jar">
</APPLET>
</td>
</tr>
</table>