JDK7使用Files代替了File------------------------------------>NIO代替常规得IO

  创建目录

 Path parPath = null;

 parPath = Files.createDirectories(Paths.get(localFilePath));   localFilePath为文件存储地址

创建文件

 Path path = Files.createTempFile(parPath, null, null);

 BufferedWriter outputStream = Files.newBufferedWriter(path, StandardCharsets.UTF_8);

写入内容

outputStream.write("要写入得内容");

outputStream.newLine();//换行

outputStream.flush();//刷新缓存区

Files.delete(path);//删除原文件