本文实例讲述了Java基于正则实现的日期校验功能。分享给大家供大家参考，具体如下：
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private void checkDate() throws IOException { // 4种分隔符 String sep = "[-\\./_]"; // 年份 String strPattern = "^(19[4-9]\\d|20\\d{2})" + sep; strPattern += "("; // 月（1,3,5,7,8,10,12) strPattern += "((0?[13578]|1[02])" + sep + "(0?[1-9]|[12][0-9]|3[01]))|"; // 月(4,6,9,11) strPattern += "((0?[469]|11)" + sep + "(0?[1-9]|[12][0-9]|30))|"; // 月（2） strPattern += "((2)" + sep + "(0?[1-9]|[12]\\d))"; strPattern += ")$"; Pattern p = Pattern.compile(strPattern); Matcher m = p.matcher(""); int count = 0; String fileName = ExcelGene.class.getResource("date.txt").getFile(); BufferedReader br = new BufferedReader(new FileReader(fileName)); String line = null; while ((line = br.readLine()) != null) { count++; if (line.trim().length() > 0) { m.reset(line); if (!m.find()) { System.out.println(count + " " + line); } else { String year = m.group(1); String month = m.group(4); month = month == null ? m.group(7) : month; month = month == null ? m.group(10) : month; String date = m.group(5); date = date == null ? m.group(8) : date; date = date == null ? m.group(11) : date; System.out.println(year + "年" + month + "月" + date + "日"); } } }} |
希望本文所述对大家java程序设计有所帮助。
