文件夹复制

//复制文件夹
   public static void copyFolder(String oldPath, String newPath) {       
    try {          
               (new File(newPath)).mkdirs();
                   // 如果文件夹不存在 则建立新文件夹
                   File a=new File(oldPath);           
                   String[] file=a.list();           
                   File temp=null;           
                   for (int i = 0; i < file.length; i++) {               
                    if(oldPath.endsWith(File.separator)){                   
                     temp=new File(oldPath+file[i]);                }               
                    else{                   
                     temp=new File(oldPath+File.separator+file[i]);                }              
                    if(temp.isFile()){                   
                     FileInputStream input = new FileInputStream(temp);                   
                     FileOutputStream output = new FileOutputStream(newPath + "/" +(temp.getName()).toString());                   
                     byte[] b = new byte[1024 * 5];                   
                     int len;                   
                     while ( (len = input.read(b)) != -1) {                       
                      output.write(b, 0, len);                    }                  
    output.flush();                  
    output.close();                  
    input.close();               
    }              
    if(temp.isDirectory()){// 如果是子文件夹
     copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);               
     }           
    }       
                   }        catch (Exception e) {    
      System.out.println("复制整个文件夹内容操作出错");          
      e.printStackTrace();        }
    }
}