|
1
21 package com.db4o.foundation.io;
22
23 import java.io.*;
24
25
28 public class File4 {
29
30 public static void rename(String  oldPath,String newPath) throws IOException {
31 if(!new java.io.File (oldPath).renameTo(new File(newPath))) {
32 throw new IOException("Could not rename '"+oldPath+"' to '"+newPath+"'.");
33 }
34 }
35
36 public static void copy(String source, String target) {
37 try {
38 java.io.File sourceFile = new java.io.File (source);
39
40 java.io.File targetFile = new java.io.File (target);
41 targetFile.mkdirs();
42 targetFile.delete();
43
44 if (sourceFile.isDirectory()) {
45 copyDirectory(sourceFile, targetFile);
46 } else {
47 copyFile(sourceFile, targetFile);
48 }
49 } catch (Exception e) {
50 System.out.println("File.copy failed.");
51 e.printStackTrace();
52 throw new RuntimeException ();
53 }
54 }
55
56 public static void copyFile(File source, File target) throws IOException {
57 final int bufferSize = 64000;
58
59 RandomAccessFile rafIn = new RandomAccessFile(source.getAbsolutePath(), "r");
60 RandomAccessFile rafOut = new RandomAccessFile(target.getAbsolutePath(), "rw");
61 long len = rafIn.length();
62 byte[] bytes = new byte[bufferSize];
63
64 while (len > 0) {
65 len -= bufferSize;
66 if (len < 0) {
67 bytes = new byte[(int) (len + bufferSize)];
68 }
69 rafIn.read(bytes);
70 rafOut.write(bytes);
71 }
72
73 rafIn.close();
74 rafOut.close();
75 }
76
77 private static void copyDirectory(File source, File target) {
78 String [] files = source.list();
79 if (files != null) {
80 for (int i = 0; i < files.length; i++) {
81 copy(Path4.combine(source.getAbsolutePath(), files[i]),
82 Path4.combine(target.getAbsolutePath(), files[i]));
83 }
84 }
85 }
86
87 public static void delete(String fname) {
88 new File(fname).delete();
89 }
90
91 public static boolean exists(String fname){
92 return new File(fname).exists();
93 }
94
95 public static void mkdirs(String path) {
96 new File(path).mkdirs();
97 }
98 }
99 |
Popular Tags |
Java API By Example, From Geeks To Geeks.