Java webservice upload and download file code sharing

package com;
 
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.Date;
import java.text.SimpleDateFormat;
import java.util.Random;
 
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/*
 * web servcie 上传下载文件
 */
public class FileProgress
{
  public String sayHello(String name)
  {
    return "Hello," + name+"\n"+getdir("2");
  }
 
  /*
   * 文件上传服务
   */
  public String uploadFile(String fileName, String filetype, String file)//byte[] bytes)
  {
    FileOutputStream fos = null;
    try
    {
      String filedir = getdir(filetype);
      BASE64Decoder decoder= new BASE64Decoder();
      byte[] bytes = decoder.decodeBuffer(file);
 
      if(filedir=="")
      {
        return "";
      }
      Integer rdm = new Random().nextInt(10000);
      String savename = getDataTimeString(true) +rdm.toString()+fileName.substring(fileName.indexOf('.'));
      fos = new FileOutputStream(filedir+savename);
      // 将字节数组bytes中的数据，写入文件输出流fos中
      fos.write(bytes);
      fos.flush();
      return filedir +savename;
    }
    catch (Exception e)
    {
      e.printStackTrace();
      return "";
    }
    finally
    {
      try
      {
        fos.close();
      }
      catch (IOException e)
      {
        e.printStackTrace();
      }
    }
  }
 
  /**
   * @param filepath
   */
  private String getdir(String filetype)
  {
    String path = "F:\\youme\\{0}\\" + getDataString()
        + "\\";
    switch (filetype)
    {
      case "2":
        path = path.replace("{0}", "image");
        break;
      case "3":
        path = path.replace("{0}", "vedio");
        break;          
      default:
        return "";
    }
    try
    {
      java.io.File file = new java.io.File(path);
      if(!file.exists())
      {
        if(!file.mkdirs())
        {
          return "";
        }
      }
      return path;
    }
    catch(Exception ex)
    {
      return "";
    }
    finally
    {
       
    }
  }
 
  /*
   * 文件下载服务
   */
  public String downloadFile(String filepath)
  {
//    filepath = "F:\\youme\\vedio\\2013-09-03\\201309031700143294.amr";
    FileInputStream in = null;
    byte bytes[] = null;
    String file = null;
    try
    {
      in = new FileInputStream(filepath);
      bytes = new byte[in.available()];
 
      // 从输入流in中,将 bytes.length 个字节的数据读入字节数组bytes中
      in.read(bytes);
      BASE64Encoder encoder = new BASE64Encoder();
      file = encoder.encode(bytes);
    }
    catch (Exception e)
    {
      e.printStackTrace();
      return "";
    }
    finally
    {
      try
      {
        in.close();
      }
      catch (IOException e)
      {
        e.printStackTrace();
      }
    }
//    return bytes;
    return file;
  }
  /*
   * 获取当前时间
   */
  private static String getDataTimeString(Boolean isfilename)
  {
    try
    {
      SimpleDateFormat formatter = null;
      if(!isfilename)
      {
        formatter= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
      }
      else
      {
        formatter= new SimpleDateFormat("yyyyMMddHHmmss"); 
      }
      Date curDate = new Date(System.currentTimeMillis());//获取当前时间   
      return formatter.format(curDate); 
    }
    catch(Exception ex)
    {
      System.out.println(ex.getMessage());
      return "";
    }
  }
 
  /*
   * 获取当前日期
   */
  private static String getDataString()
  {
    try
    {
      SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");   
      Date curDate = new Date(System.currentTimeMillis());//获取当前时间   
      return formatter.format(curDate); 
    }
    catch(Exception ex)
    {
      System.out.println(ex.getMessage());
      return "";
    }
  }  
   
}