public static File convertLineSeparator(File file, Charset charset, LineSeparator lineSeparator) {
		final List<String> lines = readLines(file, charset);
		return FileWriter.create(file, charset).writeLines(lines, lineSeparator, false);
	}
@Test
	@Disabled
	public void convertLineSeparatorTest() {
		FileUtil.convertLineSeparator(FileUtil.file("d:/aaa.txt"), CharsetUtil.CHARSET_UTF_8, LineSeparator.WINDOWS);
	}