public class IOTest {    public static void main(String[] args) {        File file = new File("D:\\IoTest");        if(!file.exists()){ //如果不存在则创建文件夹            file.mkdir();//创建文件夹        }else{            file.delete();//先删除 在创建            file.mkdir();        }        try{           /* BufferedWriter bufferedWriter =new BufferedWriter(new FileWriter("D:\\IoTest\\hzm.test"));            bufferedWriter.write("heoll.word");            bufferedWriter.close();*/           //采用复制文件            copyFile("D:\\img\\1.png","D:\\IoTest\\1.png");        }catch (Exception e){            e.printStackTrace();        }    }    //复制文件    /**     *     * @param source 源文件     * @param dest 新文件     * @throws IOException     */   public static void copyFile(String sourcePath, String destPath) throws IOException{       File source = new File(sourcePath);       File dest = new File(destPath);       InputStream inputStream = null;       OutputStream outputStream = null;       try{           inputStream =new FileInputStream(source);           outputStream =new FileOutputStream(dest);           byte [] bytes =new byte[1024];           int bytesRead;           while ((bytesRead = inputStream.read(bytes))>0){               outputStream.write(bytes,0,bytesRead);           }       }catch (Exception e){           e.printStackTrace();       }finally {          if(inputStream !=null){              inputStream.close();          }           if(outputStream !=null){               outputStream.close();           }       }   }}