Get file name without extension.

Ref:How to get file name without the extension?

Normally,there are two ways to implements this:use the library or the regular expression.

here I use the regular expression.

String s = "a.xml.ac.df.ef";

String result = s.replaceFirst("[.][^.]+$", "");

System.out.println(result);

  //outputs:a.xml.ac.df

以上是不考虑到Path, 若有Path,需要先截断路径分隔符,如:

/**获取文件的简短名称,如将"G:\\video_record\\eclipse\\promt-workspace-startup.lxe"转为

	 * "promt-workspace-startup"

	 * @param fileFullName 文件的完整路径.

	 * @return

	 */

	public static String getFileNameWithoutExtention(String fileFullName) {

		//截断路径分隔符.

		int backslash = fileFullName.lastIndexOf("\\") != -1 ? fileFullName.lastIndexOf("\\") : fileFullName.lastIndexOf("/");

		int dot = fileFullName.lastIndexOf(".");

		if (backslash > 0 && dot > 0) {

			fileFullName = fileFullName.substring(backslash + 1, dot);

		}

		return fileFullName;

	}