字符串中的特殊字符＃

Question

I have a string tmp which is as follows

  <a href="#" class="quickLinks" id="linkQL">Quick Links</a> 

I would like to be able to know that there is a # after href= .. I thought of doing it this way if (tmp.indexOf('#') == 8) but I am not able to , I think its because # is a special character

Answer 1

To test if # follows href, you can simply to this:

if (input.contains("href=\"#\""))

There is no need to involve regex, and the hash char # is not special in java, but the double quote chars need escaping.

Answer 2

If you want to check the href attribute contains a # , then use a HTML parser like jsoup

Document doc = Jsoup.parse(html);
String href = doc.select("a").first().attr("href");
boolean isHash = href.equals("#");

If you really want to just check if the there is a # anywhere on the line after a href , you could use Regex - but I suspect that is not what you want.

Answer 3

var tmp = '<a href="#" class="quickLinks" id="linkQL">Quick Links</a>';
tmp.indexOf('#');
这是返回9，这是预期的结果。

Answer 4

尝试正则表达式

boolean matches = s.matches(".+href\\s*=\\s*['\"]#['\"].+");