java 实现对文件夹排序，找出最大的文件夹，
public class SortUtil{ /** * insertionSort; * @param data, array[]; * @param first, 0; * @param last, array.length - 1; */ public static void insertionSort(Comparable[] data, int first, int last) { for(int i = first + 1; i <= last; i++) { Comparable temp = data[i]; int j = i - 1; for(; j >= first && data[j].compareTo(temp) > 0; j--) { data[j + 1] = data[j]; } data[j + 1] = temp; } } /** * getMaxCompare; * @param data, array[]; * @return Max Value; */ public static Comparable getMaxCompare(Comparable[] data) { insertionSort(data, 0, data.length - 1); return data[data.length - 1]; } public static void main(String[] args) { Comparable[] data = {3,2};//,4,12,43,654,12,242,124,151,87,1,7,1,3,2,9,3,6,2,7,8}; insertionSort(data, 0 , data.length - 1); for(int i = 0; i < data.length; i++) { System.out.print(data[i] +","); } System.out.println(); System.out.print(getMaxCompare(data)); }}public class FileEntity implements Comparable{ /** * 5.01.01.T05$12.11.20T28,12.11.20T28$12.11.20T45 */ public static final String FileSeparatorTag = "T"; public String filename = "5.01.01.T05$12.11.20"+FileSeparatorTag+"28"; @Override public int compareTo(Object obj) { String nextFileName = ((FileEntity) obj).filename; return Integer.parseInt(this.filename.substring(this.filename.lastIndexOf(FileSeparatorTag) + 1)) - Integer.parseInt(nextFileName.substring(nextFileName.lastIndexOf(FileSeparatorTag) + 1)); } public static void main(String[] args) { String tmp = "5.01.01.T05$12.11.20"+FileSeparatorTag+"28";; String tmps = tmp.substring(tmp.lastIndexOf(FileSeparatorTag) + 1); System.out.println("" + tmps); } }public class FileClient{ /** * eg.dirs: 5.01.01.T05$12.11.20T28,12.11.20T28$12.11.20T45 getDirList * * @param filepath ,directory ; * @return ,list directories; */ public static FileEntity[] getListDirs(String filepath) { List tmpList = new ArrayList(); File dir = new File(filepath); File[] files = dir.listFiles(); for(int i = 0; i < files.length; i++) { String strFile = files[i].getAbsolutePath().substring(files[i].getAbsolutePath().lastIndexOf(File.separator) + 1); System.out.println(strFile.indexOf("$") + "," + strFile); if(files[i].isDirectory() && strFile.indexOf("$") > 0 && strFile.lastIndexOf("$") < strFile.length() - 1 && strFile.lastIndexOf(FileEntity.FileSeparatorTag) < strFile.length() - 1) { FileEntity entity = new FileEntity(); entity.filename = files[i].getAbsolutePath(); tmpList.add(entity); } } if(tmpList.size() > 0) { FileEntity[] dirs = new FileEntity[tmpList.size()]; for(int i = 0; i < tmpList.size(); i++) { dirs[i] = (FileEntity)tmpList.get(i); } return dirs; } else { FileEntity entity = new FileEntity(); entity.filename = filepath; return new FileEntity[]{entity}; } } /** * getMaxDirAbsolutePath * * @param filepath , input dir, directory; * @return , maxDirAbsolutePath; */ public static String getMaxDirAbsolutePath(String filepath) { FileEntity[] dirs = getListDirs(filepath); for(int i = 0; i < dirs.length; i++) { System.out.println("dirs:" + dirs[i].filename); } SortUtil.insertionSort(dirs, 0, dirs.length - 1); for(int i = 0; i < dirs.length; i++) { System.out.println("insertionSort:" + dirs[i].filename); } FileEntity maxFileEntity = (FileEntity)SortUtil.getMaxCompare(dirs); String theMaxDir = maxFileEntity.filename; System.out.println("theMaxDir:" + theMaxDir); return theMaxDir; } /** * writeProperties * * @param propFileName , properties file path; * @param key , key; * @param value , value; */ public static void writeProperties(String propFileName, String key, String value) { File propFile = new File(propFileName); try { propFile.createNewFile(); Properties prop = new Properties(); // InputStream fis = new FileInputStream(propFileName); // // 从输入流中读取属性列表（键和元素对） // prop.load(fis); // 调用 Hashtable 的方法 put。使用 getProperty 方法提供并行性。 // 强制要求为属性的键和值使用字符串。返回值是 Hashtable 调用 put 的结果。 OutputStream fos = new FileOutputStream(propFileName); prop.put(key, value);// .setProperty(key, value); // 以适合使用 load 方法加载到 Properties表中的格式， // 将此 Properties 表中的属性列表（键和元素对）写入输出流 prop.store(fos, "Update '" + key + "' -->" + value); } catch(Exception e) { e.printStackTrace(); } } /** * test_readProperties * * @param propFileName * @param key * @param defaultValue * @return */ public static String test_readProperties(String propFileName, String key, String defaultValue) { String value = defaultValue; try { InputStream fis = new FileInputStream(propFileName); Properties prop = new Properties(); prop.load(fis); value = prop.getProperty(key, defaultValue); } catch(Exception e) { e.printStackTrace(); } System.out.println("value:" + value); return value; } /** * eg.dirs: 5.01.01.T05$12.11.20T28,12.11.20T28$12.11.20T45 * * @param args */ public static void main(String[] args) { String srcDirPath = "C:/scripts/"; String destPropPath = "./"; if(args.length == 2) { srcDirPath = args[0]; destPropPath = args[1]; } destPropPath = destPropPath + "theMaxDir" + ".properties"; String theMaxDir = getMaxDirAbsolutePath(srcDirPath).replaceAll("\\\", "\\/"); System.out.println("theMaxDir:" + theMaxDir); System.out.println("user.dir=" + System.getProperty("user.dir")); writeProperties(destPropPath, "theMaxDir", theMaxDir); test_readProperties(destPropPath, "theMaxDir", srcDirPath); }}