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Java Source | 2009-04-18 | 2.8 KB | 103 lines |
- import java.io.*;
- import java.nio.channels.*;
-
- class FileUtils {
- public static final String BACKUP_EXT = ".backup";
-
- /**
- * ├▒░∞ñ╬Ñ╒ÑíÑñÑδñ≥Ñ│Ñ╘í╝ñ╣ñδ
- * @param src Ñ│Ñ╘í╝╕╡Ñ╒ÑíÑñÑδ
- * @param dst Ñ│Ñ╘í╝└ΦÑ╒ÑíÑñÑδ(Ñ╟ÑúÑ∞Ñ»Ñ╚ÑΩñ╧╗╪─Ω╔╘▓─)
- * @param preserve ║╟╜¬╣╣┐╖╞ⁿñ≥╩▌╗²ñ╣ñδñ½ñ╬Ñ╒ÑΘÑ░
- */
- public static void copyFile(File src, File dst, boolean preserve) throws IOException {
- FileChannel srcChan = new FileInputStream(src).getChannel();
- FileChannel destChan = new FileOutputStream(dst).getChannel();
- srcChan.transferTo(0, srcChan.size(), destChan);
- srcChan.close();
- destChan.close();
-
- // ║╟╜¬╣╣┐╖╞ⁿñ≥Ñ│Ñ╘í╝
- if(preserve)
- dst.setLastModified(src.lastModified());
- }
-
- /**
- * Ñ╒ÑíÑñÑδñ≥║╞╡ó┼¬ñ╦Ñ│Ñ╘í╝ñ╣ñδ
- * @param src Ñ│Ñ╘í╝╕╡
- * @param dst Ñ│Ñ╘í╝└Φ
- * @param preserve ║╟╜¬╣╣┐╖╞ⁿñ≥╩▌╗²ñ╣ñδñ½ñ╬Ñ╒ÑΘÑ░
- */
- public static void copyRecursive(File src, File dst, boolean preserve) throws IOException {
- if(src.isFile()) {
- copyFile(src, dst, preserve);
- return;
- }
-
- if(src.isDirectory()) {
- String[] entries = src.list();
- for(int i = 0; i < entries.length; i++) {
- File src2 = new File(src, entries[i]);
- File dst2 = new File(dst, entries[i]);
- if(src2.isFile())
- copyFile(src2, dst2, preserve);
- else if(src2.isDirectory())
- copyRecursive(src2, dst2, preserve);
- else
- throw new RuntimeException(src2.getPath()
- + " is not file nor directory");
- }
- }
-
- throw new RuntimeException(src.getPath()
- + " is not file nor directory");
- }
-
- /**
- * ║╟╜¬╣╣┐╖╗■╣∩ñ≥╩▌╗²ñ╖ñ╞Ñ╨Ñ├Ñ»ÑóÑ├Ñ╫ñ≥║ε└«ñ╣ñδ
- */
- public static void makeBackupFile(File file) throws IOException {
- makeBackupFile(file, true);
- }
-
- /**
- * Ñ╒ÑíÑñÑδñ╬Ñ╨Ñ├Ñ»ÑóÑ├Ñ╫ñ≥║ε└«ñ╣ñδ
- */
- public static void makeBackupFile(File file, boolean preserve) throws IOException {
- if(!file.exists())
- return; // ѬÑΩÑ╕Ñ╩Ñδñ¼┬╕║▀ñ╖ñ╩ñññ╩ñΘ▓┐ñΓñ╖ñ╩ññ
-
- File backup = new File(file.getPath() + BACKUP_EXT);
- if(backup.exists())
- return; // Ñ╨Ñ├Ñ»ÑóÑ├Ñ╫ñ¼┬╕║▀ñ╣ñδñ╩ñΘ▓┐ñΓñ╖ñ╩ññ
-
- copyFile(file, backup, preserve);
- }
-
- /**
- * Ñ╒ÑíÑñÑδñ≥╢⌡ñ╦└┌ñΩ╡═ñßñδíú
- * ñ│ñ╬╗■ñ╦ñ▐ñ└Ñ╨Ñ├Ñ»ÑóÑ├Ñ╫ñ╡ñ∞ñ╞ñ╩ñ½ñ├ñ┐ñΘíóÑ╨Ñ├Ñ»ÑóÑ├Ñ╫ñΓ║ε└«ñ╣ñδíú
- */
- public static void truncate(File file) throws IOException {
- File backup = new File(file.getPath() + BACKUP_EXT);
- if(backup.isFile()) {
- file.delete();
- touch(file);
- } else {
- file.renameTo(backup);
- touch(file);
- }
- }
-
- /**
- * Ñ╒ÑíÑñÑδñ╬║╟╜¬╣╣┐╖╗■╣∩ñ≥╣╣┐╖ñ╣ñδíúÑ╒ÑíÑñÑδñ¼┬╕║▀ñ╖ñ╩ññ╛∞╣τñ╧║ε└«ñ╣ñδíú
- */
- public static void touch(File file) throws IOException {
- if(!file.exists())
- (new FileOutputStream(file)).close();
- if(!file.isFile())
- return; // Ñ╬í╝Ñ┐Ñ├Ñ┴
- file.setLastModified((new java.util.Date()).getTime());
- }
- }
-