Java文件操作增强工具

import org.apache.commons.io.FileUtils; 
import org.apache.commons.io.filefilter.*; 
import org.apache.commons.logging.Log; 
import org.apache.commons.logging.LogFactory; 

import java.io.*; 

/** 
* 文件工具箱 
* 
* @author leizhimin 2008-12-15 13:59:16 
*/ 
public  final  class FileToolkit { 
         private  static  final Log log = LogFactory.getLog(FileToolkit. class); 

         /** 
         * 复制文件或者目录,复制前后文件完全一样。 
         * 
         * @param resFilePath 源文件路径 
         * @param distFolder    目标文件夹 
         * @IOException 当操作发生异常时抛出 
         */ 
         public  static  void copyFile(String resFilePath, String distFolder)  throws IOException { 
                File resFile =  new File(resFilePath); 
                File distFile =  new File(distFolder); 
                 if (resFile.isDirectory()) { 
                        FileUtils.copyDirectoryToDirectory(resFile, distFile); 
                }  else  if (resFile.isFile()) { 
                        FileUtils.copyFileToDirectory(resFile, distFile,  true); 
                } 
        } 

         /** 
         * 删除一个文件或者目录 
         * 
         * @param targetPath 文件或者目录路径 
         * @IOException 当操作发生异常时抛出 
         */ 
         public  static  void deleteFile(String targetPath)  throws IOException { 
                File targetFile =  new File(targetPath); 
                 if (targetFile.isDirectory()) { 
                        FileUtils.deleteDirectory(targetFile); 
                }  else  if (targetFile.isFile()) { 
                        targetFile.delete(); 
                } 
        } 

         /** 
         * 移动文件或者目录,移动前后文件完全一样,如果目标文件夹不存在则创建。 
         * 
         * @param resFilePath 源文件路径 
         * @param distFolder    目标文件夹 
         * @IOException 当操作发生异常时抛出 
         */ 
         public  static  void moveFile(String resFilePath, String distFolder)  throws IOException { 
                File resFile =  new File(resFilePath); 
                File distFile =  new File(distFolder); 
                 if (resFile.isDirectory()) { 
                        FileUtils.moveDirectoryToDirectory(resFile, distFile,  true); 
                }  else  if (resFile.isFile()) { 
                        FileUtils.moveFileToDirectory(resFile, distFile,  true); 
                } 
        } 


         /** 
         * 重命名文件或文件夹 
         * 
         * @param resFilePath 源文件路径 
         * @param newFileName 重命名 
         * @return 操作成功标识 
         */ 
         public  static  boolean renameFile(String resFilePath, String newFileName) { 
                String newFilePath = StringToolkit.formatPath(StringToolkit.getParentPath(resFilePath) +  "/" + newFileName); 
                File resFile =  new File(resFilePath); 
                File newFile =  new File(newFilePath); 
                 return resFile.renameTo(newFile); 
        } 

         /** 
         * 读取文件或者目录的大小 
         * 
         * @param distFilePath 目标文件或者文件夹 
         * @return 文件或者目录的大小，如果获取失败，则返回-1 
         */ 
         public  static  long genFileSize(String distFilePath) { 
                File distFile =  new File(distFilePath); 
                 if (distFile.isFile()) { 
                         return distFile.length(); 
                }  else  if (distFile.isDirectory()) { 
                         return FileUtils.sizeOfDirectory(distFile); 
                } 
                 return -1L; 
        } 

         /** 
         * 判断一个文件是否存在 
         * 
         * @param filePath 文件路径 
         * @return 存在返回true，否则返回false 
         */ 
         public  static  boolean isExist(String filePath) { 
                 return  new File(filePath).exists(); 
        } 

         /** 
         * 本地某个目录下的文件列表（不递归） 
         * 
         * @param folder ftp上的某个目录 
         * @param suffix 文件的后缀名（比如.mov.xml) 
         * @return 文件名称列表 
         */ 
         public  static String[] listFilebySuffix(String folder, String suffix) { 
                IOFileFilter fileFilter1 =  new SuffixFileFilter(suffix); 
                IOFileFilter fileFilter2 =  new NotFileFilter(DirectoryFileFilter.INSTANCE); 
                FilenameFilter filenameFilter =  new AndFileFilter(fileFilter1, fileFilter2); 
                 return  new File(folder).list(filenameFilter); 
        } 

         /** 
         * 将字符串写入指定文件(当指定的父路径中文件夹不存在时，会最大限度去创建，以保证保存成功！) 
         * 
         * @param res            原字符串 
         * @param filePath 文件路径 
         * @return 成功标记 
         */ 
         public  static  boolean string2File(String res, String filePath) { 
                 boolean flag =  true; 
                BufferedReader bufferedReader =  null; 
                BufferedWriter bufferedWriter =  null; 
                 try { 
                        File distFile =  new File(filePath); 
                         if (!distFile.getParentFile().exists()) distFile.getParentFile().mkdirs(); 
                        bufferedReader =  new BufferedReader( new StringReader(res)); 
                        bufferedWriter =  new BufferedWriter( new FileWriter(distFile)); 
                         char buf[] =  new  char[1024];          //字符缓冲区 
                         int len; 
                         while ((len = bufferedReader.read(buf)) != -1) { 
                                bufferedWriter.write(buf, 0, len); 
                        } 
                        bufferedWriter.flush(); 
                        bufferedReader.close(); 
                        bufferedWriter.close(); 
                }  catch (IOException e) { 
                        flag =  false; 
                        e.printStackTrace(); 
                } 
                 return flag; 
        } 
}