Does StringEscapeUtils.escapeHtml(String) escapes $ symbol, too?

Question

I want to escape $ symbol along with other characters like '<', '>' etc. So just wanted to know if StringEscapeUtils supported this. And if not, how can I escape it?

Answer 1

Looks like no. You can try it with this code:

StringEscapeUtils.escapeHtml("<b>Hello, World!</b>$")

Outputs

<b>Hello, World!</b>$

Answer 2

I tested doing the following from commons-text 1.1 after commons-lang 3 deprecated StringEscapeUtils:

public static void main(String[] args)
{
    System.out.println(StringEscapeUtils.escapeHtml4("$ % > < = #"));
}

Output $ % > < = #

It does not escape "$" out of the box, but the new Utils in commons-text enable users to extend it. Read this article for examples. Here is a small one, but the article shows more advanced possibilities:

Map<CharSequence, CharSequence> added = new HashMap<>();
added.put("$", "foo");
System.out.println(StringEscapeUtils.ESCAPE_HTML4
                                    .with(new LookupTranslator(added))
                                    .translate("$ % > < = #"));

Output foo % > < = #