序列流 SequenceInputStream

                                        序列流                         SequenceInputStream  ——对多个流进行合并

import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.SequenceInputStream;import java.util.ArrayList;import java.util.Collection;import java.util.Collections;import java.util.Enumeration;public class SequenceStream {public static void main(String[] args) throws IOException {FileInputStream file1 = new FileInputStream("file/file/file1.txt");FileInputStream file2 = new FileInputStream("file/file/file2.txt");FileInputStream file3 = new FileInputStream("file/file/file3.txt");FileInputStream file4 = new FileInputStream("file/file/file4.txt");Collection<FileInputStream> c = new ArrayList<FileInputStream>();c.add(file1);c.add(file2);c.add(file3);c.add(file4);Enumeration<FileInputStream> e = Collections.enumeration(c);SequenceInputStream ss = new SequenceInputStream(e);           //合并到f.txtFileOutputStream fout = new FileOutputStream("file/file/f.txt");byte b[] = new byte[2048];int len = 0;while ((len = ss.read(b)) != -1) {fout.write(b, 0, len);}ss.close();fout.close();}}

输出：