纯Java文件操作工具，支持文件、文件夹的复制、删除、移动

package com.asiainfo.boss.ngcs.ext.reissuemrpt.common; 

import java.io.*; 

/** 
* 纯Java文件操作工具，支持文件、文件夹的复制、删除、移动操作。 
* 
* @author leizhimin 2010-6-2 16:12:14 
*/ 
public  class FileToolkit { 
         public FileToolkit() { 
        } 

         public  static  void main(String args[])  throws IOException { 
//                delete(new File("C:/aaa")); 
//                copy(new File("D:\\work\\mrpt"), new File("C:\\aaa")); 
                move( new File( "C:\\bbb"),  new File( "C:\\ddd")); 

        } 

         /** 
         * 删除文件（夹） 
         * 
         * @param file 文件（夹） 
         */ 
         public  static  void delete(File file) { 
                 if (!file.exists())  return; 
                 if (file.isFile()) { 
                        file.delete(); 
                }  else { 
                         for (File f : file.listFiles()) { 
                                delete(f); 
                        } 
                        file.delete(); 
                } 
        } 

         /** 
         * 复制文件（夹）到一个目标文件夹 
         * 
         * @param resFile             源文件（夹） 
         * @param objFolderFile 目标文件夹 
         * @throws IOException 异常时抛出 
         */ 
         public  static  void copy(File resFile, File objFolderFile)  throws IOException { 
                 if (!resFile.exists())  return; 
                 if (!objFolderFile.exists()) objFolderFile.mkdirs(); 
                 if (resFile.isFile()) { 
                        File objFile =  new File(objFolderFile.getPath() + File.separator + resFile.getName()); 
                         //复制文件到目标地 
                        InputStream ins =  new FileInputStream(resFile); 
                        FileOutputStream outs =  new FileOutputStream(objFile); 
                         byte[] buffer =  new  byte[1024 * 512]; 
                         int length; 
                         while ((length = ins.read(buffer)) != -1) { 
                                outs.write(buffer, 0, length); 
                        } 
                        ins.close(); 
                        outs.flush(); 
                        outs.close(); 
                }  else { 
                        String objFolder = objFolderFile.getPath() + File.separator + resFile.getName(); 
                        File _objFolderFile =  new File(objFolder); 
                        _objFolderFile.mkdirs(); 
                         for (File sf : resFile.listFiles()) { 
                                copy(sf,  new File(objFolder)); 
                        } 
                } 
        } 

         /** 
         * 将文件（夹）移动到令一个文件夹 
         * 
         * @param resFile             源文件（夹） 
         * @param objFolderFile 目标文件夹 
         * @throws IOException 异常时抛出 
         */ 
         public  static  void move(File resFile, File objFolderFile)  throws IOException { 
                copy(resFile, objFolderFile); 
                delete(resFile); 
        } 
}