使用java优化下面的代码 ：public static InputStream sheetToInputStreamSheet sheet try ByteArrayOutputStream outputStream = new ByteArrayOutputStream sheetgetWorkbookwriteoutputStream; return n

public static InputStream sheetToInputStream(Sheet sheet) throws IOException { ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); sheet.getWorkbook().write(outputStream); return new ByteArrayInputStream(outputStream.toByteArray()); }