内容

• 编写MyCP.java 实现类似Linux下cp XXX1 XXX2的功能，要求MyCP支持两个参数：
• java MyCP -tx XXX1.txt XXX2.bin 用来把文本文件（内容为十进制数字）转化为二进制文件

• java MyCP -xt XXX1.bin XXX2.txt 用来二进制文件把转化为文本文件（内容为十进制数字）

  import java.io.*;
  /**
  *Created by xiang on 2018/6/10.
  */
  public class MyCP {
  public static void dumpToTwo(InputStream src, OutputStream dest)
          throws IOException {
      try (InputStream input = src; OutputStream output = dest) {
          byte[] data = new byte[1];
          int length;
          while ((length = input.read(data)) != -1) {
              String str = Integer.toBinaryString((data[0]&0xFF)+0x100).substring(1);//Byte.parseByte(Integer.toBinaryString(num)); //转换为二进制文件
              data[0] = Byte.parseByte(str);
              output.write(data, 0, length);
          }
      }
  }
  public static void dumpToTen(InputStream src, OutputStream dest)
          throws IOException {
      try (InputStream input = src; OutputStream output = dest) {
          byte[] data = new byte[1];
          int length;
          while ((length = input.read(data)) != -1) {
              data[0] = Byte.parseByte(String.valueOf(data[0]),10); //转换为十进制文件
              output.write(data, 0, length);
          }
      }
  }
  public static void main(String[] args) {
      FileInputStream fis = null;
      FileOutputStream fos = null;
      try {
          fis = new FileInputStream("D:/Java/from.txt");
          fos = new FileOutputStream("D:/Java/to.txt");
          dumpToTen(fis, fos);
      }catch(Exception e) {
          System.out.println(e);
      }
  }
  }

  结果

  

mycp

原文：https://www.cnblogs.com/musea/p/9164723.html