Java：多个文档合并输出到一个文档

多个文档合并输出到一个文档

方法：Java NIO

package First;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.channels.FileChannel;
import java.nio.channels.WritableByteChannel;

public class Test {

    public static void main(String params[]) throws Exception {
        String[] iF = new String[] {"E:/test1.txt", "E:/test2.txt", "E:/test3.txt", "E:/test4.txt" };
        String oF = "E:/out.txt";

        FileOutputStream output = new FileOutputStream(new File(oF));
        WritableByteChannel targetChannel = output.getChannel();

        for(int i =0; i<iF.length; i++){
            FileInputStream input = new FileInputStream(iF[i]);
            FileChannel inputChannel = input.getChannel();

            inputChannel.transferTo(0, inputChannel.size(), targetChannel);

            inputChannel.close();
            input.close();
        }
        targetChannel.close();
        output.close();
        System.out.println("All jobs done...");

    }

}