Question

求正则表达式3-21位数字以英文逗号相隔

例如输入123,456正确 123456,189正确 123正确 123,错误 1234,,123错误 0不能开头

Answer 1

List<String> list = Arrays.asList(new String[]{
				"1209,6953",
				"0296,956345",
				"1589,9898,123241",
				"12312,123213,",
				"asdasd,asdasd" });
		Pattern p = Pattern.compile("^[1-9][0-9]{2,20}(\\,[1-9][0-9]{2,20})*$");
		list.forEach(x -> System.out.println(p.matcher(x).find()));

运行结果

true

false

true

false

false

Answer 2

http://zhidao.baidu.com/question/1543211949556093707