拷贝一个目录(文件)到指定路径

/** 
    *拷贝一个目录或者文件到指定路径下 
    *@paramsource 
    *@paramtarget 
    */ 
    public void copy(File source,File target) { 
      File tarpath = new File(target,source.getName()); 
      if(source.isDirectory())  { 
          tarpath.mkdir(); 
          File[] dir = source.listFiles(); 
          for (int i = 0; i < dir.length; i++) { 
              copy(dir[i],tarpath); 
          } 
      }else  { 
          try { 
              InputStream is = new FileInputStream(source); 
              OutputStream os = new FileOutputStream(tarpath); 
              byte[] buf = newbyte[1024]; 
              int len = 0; 
              while((len = is.read(buf))!=-1) { 
                  os.write(buf,0,len); 
              } 
              is.close(); 
              os.close(); 
          } catch (FileNotFoundException e) { 
              // TODO Auto-generated catch block 
              e.printStackTrace(); 
          } catch (IOException e) { 
              // TODO Auto-generated catch block 
              e.printStackTrace(); 
          } 
      } 
    }
 }