package bxd;

import java.io.*;

public class TransStreamDemo2 {

    public static void main(String[] args) throws IOException {

        method_5();

    }

    // 将一个文本文件中的数据存储到另外一个文件中

    public static void method_1() throws IOException {

        BufferedReader bufr = new BufferedReader(new FileReader("s.txt"));

        BufferedWriter bufw = new BufferedWriter(new FileWriter("d.txt"));

        String line;

        while ((line = bufr.readLine()) != null) {

            bufw.write(line);

            bufw.newLine();

            bufw.flush();

        }

        bufr.close();

        bufw.close();

    }

    // 将键盘录入的数据保存到一个文件中

    public static void method_2() throws IOException {

        BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));

        BufferedWriter bufw = new BufferedWriter(new FileWriter("d.txt"));

        String line;

        while ((line = bufr.readLine()) != null) {

            if ("over".equals(line)) break;

            bufw.write(line);

            bufw.newLine();

            bufw.flush();

        }

        bufr.close();

        bufw.close();

    }

    // 将键盘录入的数据保存到一个文件中, 并可以自定义目标文件的字符编码.

    public static void method_3() throws IOException {

        BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));

        BufferedWriter bufw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("d.txt"), "utf-8"));

        String line;

        while ((line = bufr.readLine()) != null) {

            if ("exit".equals(line)) break;

            bufw.write(line);

            bufw.newLine();

            bufw.flush();

        }

        bufr.close();

        bufw.close();

    }

    // 练习1: 将一个图片文件中的数据存储到另外一个文件中

    public static void method_4() throws IOException {

        BufferedInputStream bufis = new BufferedInputStream(new FileInputStream("1.png"));

        BufferedOutputStream bufos = new BufferedOutputStream(new FileOutputStream("2.png"));

        int by;

        while ((by = bufis.read()) != -1) {

            bufos.write(by);

        }

        bufis.close();

        bufos.close();

    }

    // 练习2: 将一个文本文件的数据输出到控制台

    public static void method_5() throws IOException {

        BufferedReader bufr = new BufferedReader(new FileReader("s.txt"));

        BufferedWriter bufw = new BufferedWriter(new OutputStreamWriter(System.out));

        String line;

        while ((line = bufr.readLine()) != null) {

            bufw.write(line);

            bufw.newLine();

            bufw.flush();

        }

        bufr.close();

        bufw.close();

    }

}