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A Java OCR SDK Library API allows you to perform OCR and bar code recognition on images (JPEG, PNG, TIFF, PDF, etc.) and output as plain text, xml with full coordinate, searchable PDF or editable RTF.
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/**********************************************************************************************
*
* Asprise OCR Java API
* Copyright (C) 1998-2015. Asprise Inc.
*
* This file is licensed under the GNU Affero General Public License version 3 as published by
* the Free Software Foundation.
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
*
* You should have received a copy of the GNU Affero General Public License. If not, please
* visit .
*
**********************************************************************************************/
package com.asprise.ocr.sample;
import com.asprise.ocr.sample.util.prefs.FileSystemPreferencesFactory;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFileChooser;
import javax.swing.JPopupMenu;
import javax.swing.UIManager;
import javax.swing.filechooser.FileFilter;
import javax.swing.plaf.FontUIResource;
import javax.swing.text.DefaultEditorKit;
import javax.swing.text.JTextComponent;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;
import java.util.prefs.Preferences;
public class DemoUtils {
static final String DELIMITER = "`";
public static void setPreferencesWithXmlBackstoreOnWindows() {
if(isWindows()) {
System.setProperty("java.util.prefs.PreferencesFactory", FileSystemPreferencesFactory.class.getName());
}
}
public static void loadPrefs(Preferences prefs, String prefKey, JComboBox combo) {
DefaultComboBoxModel comboModel = new DefaultComboBoxModel();
String recents = prefs.get(prefKey, null);
if (recents != null) {
StringTokenizer st = new StringTokenizer(recents, DELIMITER);
while (st.hasMoreTokens()) {
comboModel.addElement(st.nextToken());
}
}
combo.setModel(comboModel);
}
public static void savePrefs(Preferences prefs, String prefKey, JComboBox combo, String newValidValue) {
if (newValidValue == null) {
return;
}
DefaultComboBoxModel comboModel = (DefaultComboBoxModel) combo.getModel();
int existingIndex = comboModel.getIndexOf(newValidValue);
if (existingIndex >= 0) {
comboModel.removeElementAt(existingIndex);
}
comboModel.insertElementAt(newValidValue, 0);
combo.setSelectedIndex(0);
StringBuilder entries = new StringBuilder();
int size = Math.min(comboModel.getSize(), 20);
for (int i = 0; i < size; i++) {
entries.append(comboModel.getElementAt(i));
if (i != size - 1) {
entries.append(DELIMITER);
}
}
while (entries.length() > Preferences.MAX_VALUE_LENGTH) {
int lastIndex = entries.lastIndexOf(DELIMITER);
if (lastIndex == -1) {
break;
} else {
entries.delete(lastIndex, entries.length());
}
}
prefs.put(prefKey, entries.toString());
try {
prefs.flush();
} catch (Throwable e) {
e.printStackTrace();
}
}
public static void autoAwesomeLookAndFeel(String fontName, Map defaults) {
if (!isWindows()) {
setSystemLookAndFeel();
}
if (UIManager.getLookAndFeel().toString().contains("MetalLookAndFeel")) {
FontUIResource font = new FontUIResource(fontName == null ? Font.SANS_SERIF : fontName.trim(), Font.PLAIN, 12);
java.util.Enumeration keys = UIManager.getDefaults().keys();
while (keys.hasMoreElements()) {
Object key = keys.nextElement();
Object value = UIManager.get(key);
if (value instanceof javax.swing.plaf.FontUIResource) {
FontUIResource fontExisting = (FontUIResource) value;
UIManager.put(key, font);
}
}
UIManager.put("SplitPaneDivider.draggingColor", Color.gray);
if (defaults != null) {
for (Object key : defaults.keySet()) {
UIManager.put(key, defaults.get(key));
}
}
}
}
public static void setSystemLookAndFeel() {
if (isWindows()) {
setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} else if (isMac()) {
setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} else {
setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
}
private static boolean setLookAndFeel(String lookAndFeelClass) {
try {
UIManager.setLookAndFeel(lookAndFeelClass);
return true;
} catch (Throwable t) {
System.err.println(t.getMessage());
return false;
}
}
public static boolean isWindows() {
return System.getProperty("os.name").toLowerCase().contains("windows");
}
public static boolean isMac() {
return System.getProperty("os.name").toLowerCase().contains("mac");
}
public static JFileChooser registerBrowseButtonListener(final JComboBox comboBox, final JButton button, final boolean chooseFile, final boolean isOpen, final FileFilter fileFilter, final File initialDirectory) {
if(! comboBox.isEditable()) {
throw new IllegalArgumentException("The combo box must be editable.");
}
final JFileChooser fileChooser = new JFileChooser();
ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
fileChooser.setCurrentDirectory(comboBox.getSelectedItem() == null || comboBox.getSelectedItem().toString().trim().length() == 0 ?
initialDirectory : new File(comboBox.getSelectedItem().toString()));
fileChooser.setFileSelectionMode(chooseFile ? JFileChooser.FILES_ONLY : JFileChooser.DIRECTORIES_ONLY);
if(fileFilter != null) {
fileChooser.addChoosableFileFilter(fileFilter);
}
int ret = isOpen ? fileChooser.showOpenDialog(comboBox) :
fileChooser.showSaveDialog(comboBox);
if(ret == JFileChooser.APPROVE_OPTION) {
File file = fileChooser.getSelectedFile();
comboBox.getEditor().setItem(file.getAbsolutePath());
}
}
};
button.addActionListener(listener);
return fileChooser;
}
public static FileFilter getFileFilterForExtensions(final String[] exts, final boolean ignoreCase) {
FileFilter filter = new FileFilter() {
@Override
public String getDescription() {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < exts.length; i++) {
if(i != 0) {
sb.append(", ");
}
sb.append("*." + exts[i]);
}
return sb.toString();
}
@Override
public boolean accept(File f) {
if(f == null) {
return false;
}
if(f.isDirectory()) {
return true;
}else if(ignoreCase) {
for (int i = 0; i < exts.length; i++) {
if(f.getName().toUpperCase().endsWith("." + exts[i].toUpperCase())) {
return true;
}
}
}else{
for (int i = 0; i < exts.length; i++) {
if(f.getName().endsWith("." + exts[i])) {
return true;
}
}
}
return false;
}
};
return filter;
}
public static void fixPrefsWarning() {
try {
Class classPlatformLogger = Class.forName("sun.util.logging.PlatformLogger");
Method methodGetLogger = classPlatformLogger.getMethod("getLogger", String.class);
Object objectLogger = methodGetLogger.invoke(null, "java.util.prefs");
Method methodSetLevel = classPlatformLogger.getMethod("setLevel", int.class);
methodSetLevel.invoke(objectLogger, 1000);
} catch (Throwable t) {
}
}
public static void showWindowBestSizeAndPosition(Window window) {
Dimension dimBack = Toolkit.getDefaultToolkit().getScreenSize();
Dimension dimWin = window.getSize();
int x = (int)((1 - 0.5) * (dimBack.width - dimWin.width));
int y = (int)((1 - 0.618) * (dimBack.height - dimWin.height));
window.setLocation(x, y);
}
public static void enableMenu(JTextComponent text) {
final Action actionCopySelected = text.getActionMap().get(DefaultEditorKit.copyAction);
final Action actionSelectAll = text.getActionMap().get(DefaultEditorKit.selectAllAction);
final Action actionUnselect = text.getActionMap().get("unselect");
Action actionCopyAll = new AbstractAction("Copy All to System Clipboard") {
@Override
public void actionPerformed(ActionEvent e) {
if(actionSelectAll != null) {
actionSelectAll.actionPerformed(e);
}
if(actionCopySelected != null) {
actionCopySelected.actionPerformed(e);
}
if(actionUnselect != null) {
actionUnselect.actionPerformed(e);
}
}
};
JPopupMenu popupMenu = new JPopupMenu();
if(actionCopySelected != null) {
actionCopySelected.putValue(Action.NAME, "Copy Selected");
popupMenu.add(actionCopySelected);
}
if(actionSelectAll != null && actionCopySelected != null) {
popupMenu.add(actionCopyAll);
}
text.setComponentPopupMenu(popupMenu);
}
private static List iconsLogo;
public static List getApplicationIconsLogo() {
if(iconsLogo == null) {
iconsLogo = new ArrayList();
iconsLogo.add(Toolkit.getDefaultToolkit().createImage(DemoUtils.class.getResource("/icon/16.png")));
iconsLogo.add(Toolkit.getDefaultToolkit().createImage(DemoUtils.class.getResource("/icon/32.png")));
iconsLogo.add(Toolkit.getDefaultToolkit().createImage(DemoUtils.class.getResource("/icon/64.png")));
iconsLogo.add(Toolkit.getDefaultToolkit().createImage(DemoUtils.class.getResource("/icon/128.png")));
}
return iconsLogo;
}
public static String getText(JComboBox editableComboBox) {
return ((JTextComponent)editableComboBox.getEditor().getEditorComponent()).getText().trim();
}
}