Java 小工具

一、获取不带后缀名的文件名称

    String fileName = file.getName.substring(0,file.getName.lastIndexOf(".");

二、Pattern正则表达式的使用

		String line = null;
		FileInputStream fis = new FileInputStream(fin);

		// Construct BufferedReader from InputStreamReader
		BufferedReader br = new BufferedReader(new InputStreamReader(fis, "GBK"));
		Pattern pattern = Pattern.compile("[\\u4e00-\\u9fa5]+");
		int lineNum = 0;
		String s = "";
		while ((line = br.readLine()) != null) {
			lineNum++;
			Matcher matcher = pattern.matcher(line);
			String str = "";
			while (matcher.find()) {
				matcher.group();
				str += matcher.group();
			}
		}