如何使用Java合並多個文件

如何使用Java合並多個文件：

1. import static java.lang.System.out;
3. import java.io.FileInputStream;
4. import java.io.FileOutputStream;
5. import java.io.IOException;
6. import java.nio.ByteBuffer;
7. import java.nio.channels.FileChannel;
8. import java.util.Arrays;
11. public class test {
13. public static final int BUFSIZE = 1024 * 8;
15. public static void mergeFiles(String outFile, String[] files) {
16. FileChannel outChannel = null;
17. out.println("Merge " + Arrays.toString(files) + " into " + outFile);
18. try {
19. outChannel = new FileOutputStream(outFile).getChannel();
20. for(String f : files){
21. FileChannel fc = new FileInputStream(f).getChannel();
22. ByteBuffer bb = ByteBuffer.allocate(BUFSIZE);
23. while(fc.read(bb) != -1){
24. bb.flip();
25. outChannel.write(bb);
26. bb.clear();
27. }
28. fc.close();
29. }
30. out.println("Merged!! ");
31. } catch (IOException ioe) {
32. ioe.printStackTrace();
33. } finally {
34. try {if (outChannel != null) {outChannel.close();}} catch (IOException ignore) {}
35. }
36. }
38. public static void main(String[] args) {
39. mergeFiles("D:/output.txt", new String[]{"D:/in_1.txt", "D:/in_2.txt", "D:/in_3.txt"});
40. }
41. }