疯狂java讲义习题11.5

题目描述：编写一个命令行工具，能够像Windows提供的cmd命令一样，可以执行各种常见的命令，如dir,move等
代码如下：(功能有待完善)

import java.io.*;
import java.util.Scanner;
public class cmd {
     public static void showAllFiles(String path)
     {
     File newFile = new File(path);
     if (newFile.exists())
     {
     File[] fileList = newFile.listFiles();
     if (fileList.length == 0)
     {
     System.out.println("文件夹是空的");
     }

     for (File file:fileList)
     {
     if (file.isFile())
     {
     System.out.println("文件名"+file.getAbsolutePath());
     }
     else{
     System.out.println("路径名"+file.getAbsolutePath());
                        showAllFiles(file.getAbsolutePath());
     }
     }
     }
     else
     System.out.println("文件不存在");
     }
     public static void copyFile(String dst,String src) throws IOException
     {
     FileOutputStream fos = null;
     FileInputStream fis = null;
                fos = new FileOutputStream(dst+"\\"+src.substring(src.lastIndexOf('\\')+1));
                fis = new FileInputStream(src);
     int hasRead = 0;
     byte[] bbuf = new byte[1024];
     while ((hasRead = fis.read(bbuf)) > 0)
     {

                    fos.write(bbuf,0,hasRead);
     }

     }
     public static void copy(String dst,String src) throws IOException
     {
     File newFile = new File(src);
     File[] fileList = newFile.listFiles();
     //File dstFile = new File(dst+"//"+newFile.getName());
     if (newFile.isFile())
     {

                copyFile(dst,src);
     }
     else
     {
     File dstFile = new File(dst+"//"+newFile.getName());
     if (!dstFile.exists())
     {
                    dstFile.mkdirs();
     }
     for (File file:fileList)
     {
     if (file.isFile())
                            copyFile(dstFile.getAbsolutePath(),file.getAbsolutePath());
     else
     copy(dstFile.getAbsolutePath(),file.getAbsolutePath());
     }
     }
     }
    public static void main(String[] args) throws IOException {
        InputStreamReader reader = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(reader);
        String line = null;
        while ((line = br.readLine()) != null)
        {
            //System.out.println(line[0]);
             String ss[] = line.split(" ");//用Scanner无法处理\n
            // char c = ss[0].charAt(0);
             if (ss.length > 3)
             {

                 return;
             }
             if (ss[0].equals("move"))
             {

                 copy(ss[1],ss[2]);
                 System.out.println("OK");
             }
        /*     else  if ((c =='c' || c == 'C') ||
                     (c == 'd' || c == 'd'))

             {
                 System.out.println(c+"\\>");

             }*/
             else if (ss[0].equals("dir"))//文件名不能有空格
             {
                 System.out.println(ss[1]);
                 showAllFiles(ss[1]);

             }
             else
             {
                 System.out.println(ss[0]);
                 System.out.println("hi");
             }
        }



    }
}
/*import java.io.*;

public class cmd
{
 public static void main(String args[]) throws IOException
 {
  System.out.print("请输入回车键继续...");
  if (new InputStreamReader(System.in).read() == 13)
  {
   //Do something here;
  }
 }
}*/