例10-10.java

JAVA用Java和XML建立试题库管理系统,试题库管理系统的设计

//例10.10   FTPClass.java
import sun.net.ftp.*;
import sun.net.*;
import java.net.*;
import java.io.*;
class FTPClass
{
  static FtpClient Ftp;
  public static void main(String args[]) throws Exception
  {
    StringBuffer buf=new StringBuffer();
    Ftp=new FtpClient(args[0]);
    Ftp.login("anonymus","[e-mail]");
    Ftp.ascii();
    TelnetInputStream input=Ftp.list();
    System.out.println("The content(directories and files)and files)of remote host:");
    int ch; 
    while((ch=input.read())>=0)
      buf.append((char)ch);
    input.close();
    System.out.println(buf.toString());
    System. out.println();
    System.out.println("pliase input the filename you want to download;");
    buf.setLength(0);
    try
    {
      while((ch=(char)System.in.read())!='\n')
        buf.append((char)ch);
    }
    catch(IOException e)
    {    System.out.println("Caught exception:"+e. getMessage());  }
    input.close();
    System.out.println("The content of the downIoad file:");
    System.out.println(buf.toString());
    System.out.println();
    System.out.println("PIease input the file name and ditectory name of sending toremote host");
    System.out.print("File name:");
    buf.setLength(0);
    try
    {
      while((ch=(char)System.in.read())!='\n')
        buf.append((char)ch);
    }
    catch(IOException e)
    {  System.out.println("cayggt excwption:"+e. getMessage());   }
    StringBuffer dir=new StringBuffer();
    System.out.print("\nDirectory name:");
    try
    {
      while((ch=(char)System.in.read())!='\n')
        dir.append((char)ch);
    }
    catch(IOException e)
    {
      System.out.println("exception:"+e.getMessage());
      File localFile=new File(dir.toString(),buf.toString());
      RandomAccessFile sendFile=new RandomAccessFile(localFile,"rw");
      TelnetOutputStream output=Ftp.put(buf.toString());
      sendFile.seek(0);
      while(sendFile.getFilePointer()<sendFile.length())
      {
        ch=sendFile.read();
        output.write(ch);
      }
    }
  }
}