Today,while going through my office x-mas party photos on fb, I came across a new idea that could be implemented quickly & could be very useful. It was a simple java class file that we can use to re-order the photos depending on their last modified time stamp. After about 3 hours of coding & testing I was able to produce the following piece of code.You can re-use this code to order them,number them and re-encode them. This is currently implemented in command line mode. But could be easily integrated to a java desktop of web application front end. I thought of publishing it as I thought it could be useful to anyone in the future.
Following is the Code Listing for the Java Based Photo Organizer Class
Following is the Code Listing for the Java Based Photo Organizer Class
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;
import javax.imageio.ImageIO;
/**
*
* @author mootarpe
*/
public class PhotoSorterMain {
// Program Constants
private static String IMAGE_PREFIX = "shen747";
private static int IMAGE_ST_INDEX = 1;
private static final String OUT_FOLDER = "sorted_out";
/* Method Sorting the Images Using Binary Sort Algorithm */
private List sortImages(List imageList) throws Exception {
// Convert List to Array
File[] f = (File[]) imageList.toArray(new File[0]);
// Sort the Array Uisng bubble sort
for (int i = 0; i < (f.length - 1); i++) {
// Loop once for each element in the array.
for (int index = 0; index < (f.length - 1) - i; index++) {
// Once for each element, minus the counter.
if (getTimeStamp(f[index]) > getTimeStamp(f[index + 1])) {
// Test if need a swap or not.
System.out.println("Swapping File -> " + f[index].getName() + " with " + f[index + 1].getName());
// These three lines just swap the two elements:
File temp = f[index];
f[index] = f[index + 1];
f[index + 1] = temp;
}
}
}
// Convert Again to List & Return
return Arrays.asList(f);
}
/* Method Returning the Corresponding TimeStamp for an Image */
private Long getTimeStamp(File file) throws Exception {
return file.lastModified();
}
/* Method Listing the Photo List In the Directory */
private List getPhotoListInDirectory(String dirPath) throws Exception {
File dir = new File(dirPath);
File[] files = dir.listFiles(new FilenameFilter() {
public boolean accept(File dir, String name) {
if (name.endsWith(".jpg") | name.endsWith(".JPG")) {
return true;
} else {
return false;
}
}
});
// Converting the Array To List & Returning
return Arrays.asList(files);
}
/* Method Writing the Photos to the Output Folder */
private void prepareImages(List photoList, String dir) throws Exception {
System.out.println("Received : " + photoList);
String seperator = System.getProperty("file.separator");
// Create Output Folder
File foutDir = new File(dir + seperator + OUT_FOLDER);
foutDir.mkdir();
// Write Files to the Output Folder
for (Iterator itr = photoList.iterator(); itr.hasNext();) {
File f = (File)itr.next();
System.out.println("\n\nEncoding File --> " + f.getName());
// Writing the File Object Directly to File
String fileName = foutDir.getAbsolutePath() + seperator+ IMAGE_PREFIX + "-" + IMAGE_ST_INDEX + ".jpg";
System.out.println("New File Name -->" + fileName+ " With time Stamp = "+ new Date(getTimeStamp(f)).toString());
// Copy the Files
BufferedImage bufImg1 = readImageFromFile(f);
writeImageToJPG(new File(fileName), bufImg1);
// Increating the Image Name Index
IMAGE_ST_INDEX++;
}
}
/*
* The Core Process Method Carring Out the Process (Bussiness Logic Method)
*/
public boolean doPhotoSortingProcess(String photoDir) {
try {
// 1.Set the Photo Directory Path
String dir = photoDir;
// 2.Get the Photo List In The Directory
List photos = getPhotoListInDirectory(dir);
System.out.println("PHOTOS : " + photos);
// 3.Sort The Photo List & Derefecne the List Obj
List sortedImages = sortImages(photos);
// 4.Out put the sorted List to a output folder
prepareImages(sortedImages, dir);
// 5.Clean Up Everything/Return Status
return true;
} catch (Exception ex) {
System.out.println("The following Exception Occured : "+ ex.getMessage());
ex.printStackTrace();
return false;
}
}
/* Method Reading a Image to a buffer */
public static BufferedImage readImageFromFile(File file) throws Exception {
return ImageIO.read(file);
}
/* Method Writing a File as a JPEG Image */
public static void writeImageToJPG(File file, BufferedImage bufferedImage)
throws Exception {
ImageIO.write(bufferedImage, "jpg", file);
}
// Main Method For Local Testing
public static void main(String[] args) {
// Modified to Command Line Mode
Scanner s = new Scanner(System.in);
// Getting Input
System.out.println("Enter Picture Directory Path and Press Enter : ");
String dir = s.nextLine();
System.out.println("You Entered : " + dir);
PhotoSorterMain phm = new PhotoSorterMain();
boolean status = phm.doPhotoSortingProcess(dir);
System.out.println("Photo Ordering Status : " + status);
}
}
