Java HTML Unescape unescapeHtml(String s)

Description

Reverses the escaping done by escapeForHtml.

License

Open Source License

Declaration

public static String unescapeHtml(String s) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    /**//from ww  w . j av a2s.c  om
     * Reverses the escaping done by escapeForHtml.
     * This method is only meant to cope with HTML from escapeForHtml, not general HTML using arbitrary entities.
     * Unknown entities will be preserved.
     */
    public static String unescapeHtml(String s) {
        final int sLength = s.length();
        final StringBuilder result = new StringBuilder(sLength);
        for (int i = 0; i < sLength; ++i) {
            final char ch = s.charAt(i);
            if (ch == '&') {
                if (s.startsWith("&amp;", i)) {
                    result.append('&');
                    i += 4;
                } else if (s.startsWith("&quot;", i)) {
                    result.append('"');
                    i += 5;
                } else if (s.startsWith("&gt;", i)) {
                    result.append('>');
                    i += 3;
                } else if (s.startsWith("&lt;", i)) {
                    result.append('<');
                    i += 3;
                } else {
                    // There are a lot of entities we don't know. Leave them unmolested.
                    result.append(ch);
                }
            } else {
                result.append(ch);
            }
        }
        return result.toString();
    }
}

Related

1. unescapeHtml(final String input)
2. unescapeHTML(String comment)
3. unescapeHTML(String html)
4. unescapeHtml(String s)
5. unescapeHTML(String s)
6. unescapeHTML(String s)
7. unescapeHTML(String s)
8. unescapeHTML(String source)
9. unescapeHTML(String source)