3.28作业

package com.qiku.day20;

import java.io.*;

public class Zy1 {
    //分别使用字符输入输出流FileWriter/FileReader
    // 文件输入输出流FileInputStream/FileOutputStream
    // 文件缓冲流BufferedInputStream/BufferedOutputStream
    // 字符缓冲流BufferedWriter/BufferedReader
    // 4种方式实现
    public static void main(String[] args) throws Exception {
        //字符缓冲流BufferedWriter/BufferedReader
        FileReader fr = new FileReader("111.txt");
        BufferedReader br = new BufferedReader(fr,1024);
        FileWriter fw = new FileWriter("111.txt.z");
        BufferedWriter bw = new BufferedWriter(fw,1024);
        int r = 0;
        long s1 = System.currentTimeMillis();
        while (r != -1){
            r=br.read();
            bw.write(r);
        }
        long s2 = System.currentTimeMillis();
        System.out.println("复制完毕，用时：" + (s2-s1));
        br.close();
        bw.close();

//分别使用字符输入输出流FileWriter/FileReader
        FileReader fr1 = new FileReader("111.txt");
        FileWriter fw2 = new FileWriter("111.txt.z");
        int r1 = 0;
        long s3 = System.currentTimeMillis();
        while (r1 != -1){
            r1=fr1.read();
            fw2.write(r1);
        }
        long s4 = System.currentTimeMillis();
        System.out.println("复制完毕，用时：" + (s4-s3));
        fr1.close();
        fw.close();
//文件输入输出流FileInputStream/FileOutputStream
        FileInputStream in = new FileInputStream("E:\\Temp\\TxGameDownload");
        FileOutputStream out = new FileOutputStream("E:\\Temp\\TxGameDownload.副本");
        byte[] bytes =new byte[1024];
        long l = System.currentTimeMillis();
        while (true){
            int r2 = in.read();
            if (r2 == -1){
                break;
            }else {
                out.write(bytes);
            }
        }
        long l1 = System.currentTimeMillis();
        System.out.println("复制完毕，用时：" + (l1-l));
        in.close();
        out.close();
        //文件缓冲流BufferedInputStream/BufferedOutputStream
        FileInputStream in1 = new FileInputStream("E:\\Temp\\TxGameDownload");
        BufferedInputStream bin = new BufferedInputStream(in1,1024);
        FileOutputStream out1 = new FileOutputStream("E:\\Temp\\TxGameDownload.副本");
        BufferedOutputStream bout = new BufferedOutputStream(out1,1024);
        long d1 = System.currentTimeMillis();
        while (true){
            int r2 = bin.read();
            if (r2 == -1){
                break;
            }else {
                bout.write(r2);
            }
        }
        long d2 = System.currentTimeMillis();
        System.out.println("复制完毕，用时：" + (d2-d1));
        bin.close();
        bout.close();
    }
}