自己写了个拷贝多级文件的代码如下：

1. package javabase;
   
2. 
   
3. import java.io.File;
   
4. import java.io.FileInputStream;
   
5. import java.io.FileOutputStream;
   
6. import java.io.InputStream;
   
7. 
   
8. public class CopyLayersFile {
   
9. public static void main(String[] args) throws Exception {
   
10. copyDir("F:/learntest", "D:");
    
11. }
    
12. 
    
13. public static void copyDir(String src, String dest) throws Exception {
    
14. File srcFile = new File(src);
    
15. if (!srcFile.exists())
    
16. return;
    
17. if (srcFile.isHidden())
    
18. return;
    
19. String srcPath = srcFile.getAbsolutePath();
    
20. System.out.println(srcPath);
    
21. String destPath = dest+"\\"+srcFile.getName();
    
22. System.out.println(destPath);
    
23. File destFile = new File(destPath);/**/
    
24. File[] files = srcFile.listFiles();
    
25. destFile.mkdir();
    
26. for (File file : files) {
    
27. 
    
28. if (file.isDirectory()) {
    
29. copyDir(file.getAbsolutePath(), destFile.getAbsolutePath());
    
30. } else {
    
31. copy(file.getAbsolutePath(), destFile.getAbsolutePath());
    
32. }
    
33. }
    
34. }
    
35. 
    
36. private static void copy(String from, String to) throws Exception {
    
37. InputStream in = new FileInputStream(from);
    
38. FileOutputStream out = new FileOutputStream(to);
    
39. byte[] bytes = new byte[1024];
    
40. int len = 0;
    
41. while ((len = in.read(bytes)) != -1) {
    
42. out.write(bytes, 0, len);
    
43. }
    
44. in.close();
    
45. out.close();
    
46. }
    
47. }

复制代码

提示错误：
F:\learntest
D:\learntest
F:\learntest\.metadata
D:\learntest\.metadata
Exception in thread "main" java.io.FileNotFoundException: D:\learntest\.metadata (拒绝访问。)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:194)
at java.io.FileOutputStream.<init>(FileOutputStream.java:84)
at javabase.CopyLayersFile.copy(CopyLayersFile.java:38)
at javabase.CopyLayersFile.copyDir(CopyLayersFile.java:31)
at javabase.CopyLayersFile.copyDir(CopyLayersFile.java:29)
at javabase.CopyLayersFile.main(CopyLayersFile.java:10)

大神都去哪了，来个大神给解释下

做了小小的修改 可以了  你看看

System.out.println(srcPath);
File destFile = new File(dest);
destFile.mkdirs();
File[] files = srcFile.listFiles();
for (File file : files) {
String destPath = dest+"\\"+file.getName();
if (file.isDirectory()) {
copyDir(file.toString(), destPath);
}
else {
copy(file.toString(), destPath);
}
}