如何使用java合并多个文件

 

import static java.lang.System.out;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.nio.ByteBuffer;import java.nio.channels.FileChannel;import java.util.Arrays;public class test {public static final int BUFSIZE = 1024 * 8;public static void mergeFiles(String outFile, String[] files) {FileChannel outChannel = null;out.println("Merge " + Arrays.toString(files) + " into " + outFile);try {outChannel = new FileOutputStream(outFile).getChannel();for(String f : files){FileChannel fc = new FileInputStream(f).getChannel(); ByteBuffer bb = ByteBuffer.allocate(BUFSIZE);while(fc.read(bb) != -1){bb.flip();outChannel.write(bb);bb.clear();}fc.close();}out.println("Merged!! ");} catch (IOException ioe) {ioe.printStackTrace();} finally {try {if (outChannel != null) {outChannel.close();}} catch (IOException ignore) {}}}public static void main(String[] args) {mergeFiles("D:/output.txt", new String[]{"D:/in_1.txt", "D:/in_2.txt", "D:/in_3.txt"});}}