管道合并流

package org.java.io;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.SequenceInputStream;
import java.util.Enumeration;
import java.util.Vector;

public class SequenceInpustStreamTest
{
    public static void main(String[] args) throws IOException
    {
        sequence();

    }//管道合并流
    public static void sequence() throws IOException{
        Vector<InputStream> v=new Vector<InputStream>();
        v.add(new FileInputStream(new File("D:\\info\\1.txt")));
        v.add(new FileInputStream(new File("D:\\info\\2.txt")));
        v.add(new FileInputStream(new File("D:\\info\\3.txt")));
        Enumeration<InputStream> ements=v.elements();
        InputStream sequenceInputStream=new SequenceInputStream(ements);
        OutputStream out=new FileOutputStream(new File("D:\\info\\4.txt"));
        int len=0;
        byte[] buf=new byte[1024];
        while((len=sequenceInputStream.read(buf))!=-1){
            out.write(buf, 0, len);
            out.flush();
        }
        sequenceInputStream.close();
        out.close();
    
    }
}