一致批量修改照片名字

统一批量修改照片名字
在给小宝拍的照片中，有我手机拍的，有媳妇手机拍的，还有相机拍的，于是每个月给小宝选的30张照片中，文件命名很乱。现在根据文件修改属性，统一按时间戳命名，精确到秒。


程序如下：
（程序规模小，因此未考虑潜在的重名问题）

import java.io.File;import java.text.SimpleDateFormat;import java.util.Date;public class UpdateFileName {private static final String dir = "C:/Documents and Settings/Administrator/My Documents/My Pictures/dir/";public static void updateName() {File fdir = new File(dir);File[] list = fdir.listFiles();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH.mm.ss");for (File f : list) {if (f.isFile() && f.getName().toUpperCase().endsWith(".JPG")) {Date date = new Date(f.lastModified());String newName = sdf.format(date);System.out.print(f.getName() + "\t");System.out.println(newName + ".jpg");f.renameTo(new File(dir + newName + ".jpg"));}}}/** * @param args */public static void main(String[] args) {updateName();}}

即使就是今天，还是遇到了同名的问题，可见，作为一个合格而严谨的代码工，一定不能心存任何侥幸。程序更新如下，对于同一秒拍摄的照片，使用毫秒级的时间戳加6位随机整数来命名，以此解决上面程序的同名问题：

import java.io.File;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Random;public class UpdateFileName {private static final String PROCESS_DIR = "C:/Documents and Settings/Administrator/My Documents/My Pictures/dir/";private static final Random RANDOM = new Random();/** * update the picture file names */public static void updateName() {File fdir = new File(PROCESS_DIR);File[] list = fdir.listFiles();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH.mm.ss");// 需要考虑重名文件问题HashMap<String, Integer> fileAllNames = new HashMap<String, Integer>();SimpleDateFormat sdfAnother = new SimpleDateFormat("yyyy-MM-dd HH.mm.ss.SSS");for (File f : list) {if (f.isFile() && f.getName().toUpperCase().endsWith(".JPG")) {Date date = new Date(f.lastModified());String newName = sdf.format(date);if (fileAllNames.containsKey(newName) ){ // 有重名的newName = sdfAnother.format(date);int rint = RANDOM.nextInt(999999-100000+1)+100000 ; // get a number between [a,b]newName = newName + "."+ String.valueOf(rint);}fileAllNames.put(newName, 1);System.out.print(f.getName() + "\t\t\t");System.out.println(newName + ".jpg");boolean succeed = f.renameTo(new File(PROCESS_DIR + newName + ".jpg"));if (!succeed) {System.err.println("Rename failed: New File Name - " + newName);}}}} /** * @param args */public static void main(String[] args) {updateName();}}

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程序再次更新，源于变态的apple使用iTunes导出文件，导致modified date time跟拍摄时间不一致。下面程序读取Exif信息做为拍摄时间，需要导入外部JAR包 metadata-extractor-2.4.0-beta-1.jar

import java.io.File;import java.util.HashMap;import java.util.Random;import com.drew.imaging.jpeg.JpegMetadataReader;import com.drew.imaging.jpeg.JpegProcessingException;import com.drew.metadata.Directory;import com.drew.metadata.Metadata;import com.drew.metadata.MetadataException;import com.drew.metadata.exif.ExifDirectory;public class UpdateJPGNameWithTimeStamp {private static final String PROCESS_DIR = "C:/Users/IBM_ADMIN/Pictures/11/";private static final Random RANDOM = new Random();private static String model = "";public static String findEXIFDateTime(File jpegFile) {Metadata metadata;try {metadata = JpegMetadataReader.readMetadata(jpegFile);Directory exif = metadata.getDirectory(ExifDirectory.class);String newname = exif.getDescription(ExifDirectory.TAG_DATETIME_ORIGINAL);// System.out.println(newname);if (newname!=null && newname.contains(":")){newname = newname.replaceFirst(":", "-");newname = newname.replaceFirst(":", "-");newname = newname.replaceFirst(":", ".");newname = newname.replaceFirst(":", ".");newname = newname.replaceFirst(":", ".");}model = exif.getDescription(ExifDirectory.TAG_MODEL);// System.out.println(exif.getDescription(ExifDirectory.TAG_EXIF_VERSION));return newname;} catch (JpegProcessingException e) {e.printStackTrace();} catch (MetadataException e) {e.printStackTrace();}return null;}public static void updateAll() {File fdir = new File(PROCESS_DIR);File[] list = fdir.listFiles();// 需要考虑重名文件问题HashMap<String, Integer> fileAllNames = new HashMap<String, Integer>();for (File f : list) {if (f.isFile() && f.getName().toUpperCase().endsWith(".JPG")) {String newName = findEXIFDateTime(f);if (newName == null || newName.equals("")) {continue;}if (fileAllNames.containsKey(newName + ".jpg")) { // 有重名的int rint = RANDOM.nextInt(999999 - 100000 + 1) + 100000;newName = newName + "." + String.valueOf(rint);}newName = newName + ".jpg";fileAllNames.put(newName, 1);System.out.print("Old name: " + f.getName() + "\t");System.out.print("New name: " + newName + "\t");System.out.println("by " + model);boolean succeed = f.renameTo(new File(PROCESS_DIR + newName));if (!succeed) {System.err.println("Rename failed: New File Name - "+ newName);}}}System.out.println("Done! Totally updated " + fileAllNames.keySet().size() );}/** * @param args */public static void main(String[] args) {UpdateJPGNameWithTimeStamp.updateAll();}}

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