package com.soar.otherio;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.SequenceInputStream;import java.util.Enumeration;import java.util.Vector;public class Demo1_SequenceInputStream { /** * * 1.什么是序列流 * 序列流可以把多个字节输入流整合成一个, 从序列流中读取数据时, 将从被整合的第一个流开始读, 读完一个之后继续读第二个, 以此类推.* * * 2.使用方式 * 整合两个: SequenceInputStream(InputStream, InputStream) * 整合多个: SequenceInputStream(Enumeration) */ public static void main(String[] args) throws IOException { //demo1(); //demo2(); FileInputStream fis1 = new FileInputStream("a.txt"); FileInputStream fis2 = new FileInputStream("b.txt"); FileInputStream fis3 = new FileInputStream("c.txt"); Vectorv = new Vector<>(); //创建集合对象 v.add(fis1); //将流对象存储进来 v.add(fis2); v.add(fis3); Enumeration en = v.elements(); SequenceInputStream sis = new SequenceInputStream(en); //将枚举中的输入流整合成一个 FileOutputStream fos = new FileOutputStream("d.txt"); int b; while((b = sis.read()) != -1){ fos.write(b); } sis.close(); fos.close(); } private static void demo2() throws FileNotFoundException, IOException { FileInputStream fis1 = new FileInputStream("a.txt"); FileInputStream fis2 = new FileInputStream("b.txt"); SequenceInputStream sis = new SequenceInputStream(fis1, fis2); FileOutputStream fos = new FileOutputStream("c.txt"); int b; while((b = sis.read()) != -1){ fos.write(b); } sis.close(); //sis在关闭的时候,会将构造方法中传入的流对象也都关闭 fos.close(); } private static void demo1() throws FileNotFoundException, IOException { FileInputStream fis1 = new FileInputStream("a.txt"); //创建字节输入流关联a.txt FileOutputStream fos = new FileOutputStream("c.txt"); //创建字节输出流关联c.txt int b1; while((b1 = fis1.read()) != -1){ //不断地在a.txt上读取字节 fos.write(b1); //将独到的字节写道c.txt } fis1.close(); //关闭字节流 FileInputStream fis2 = new FileInputStream("b.txt"); int b2; while((b2 = fis2.read()) != -1){ fos.write(b2); } fis2.close(); fos.close(); }}