Escape characters that are considered to be special HTML characters.

Description

Demo Code

/*//from   w w w.j  av a  2  s.  c om
 This is free and unencumbered software released into the public domain.

 Anyone is free to copy, modify, publish, use, compile, sell, or
 distribute this software, either in source code form or as a compiled
 binary, for any purpose, commercial or non-commercial, and by any
 means.

 In jurisdictions that recognize copyright laws, the author or authors
 of this software dedicate any and all copyright interest in the
 software to the public domain. We make this dedication for the benefit
 of the public at large and to the detriment of our heirs and
 successors. We intend this dedication to be an overt act of
 relinquishment in perpetuity of all present and future rights to this
 software under copyright law.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 OTHER DEALINGS IN THE SOFTWARE.
 */
//package com.java2s;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] argv) {
        String input = "java2s.com";
        System.out.println(escapeHtml(input));
    }

    private static final Pattern REPLACE_QUOTE = Pattern.compile("'");
    private static final Pattern REPLACE_DOUBLE_QUOTE = Pattern
            .compile("\"");
    private static final Pattern REPLACE_LESS_THAN = Pattern.compile("<");
    private static final Pattern REPLACE_GREATER_THAN = Pattern
            .compile(">");
    private static final Pattern REPLACE_AMP = Pattern.compile("&");
    private static final Pattern REPLACE_FORWARD_SLASH = Pattern
            .compile("/");

    /**
     * Escape characters that are considered to be special HTML characters.
     *
     * @param input String with potential special HTML characters.
     * @return String with all special HTML characters properly formatted.
     */
    public static String escapeHtml(String input) {
        if (input == null) {
            return null;
        }

        Matcher matcher = REPLACE_AMP.matcher(input);
        input = matcher.replaceAll("&amp;");

        // Prefer &#39; instead of &apos;
        // See: http://www.w3.org/TR/2002/REC-xhtml1-20020801/#C_16
        matcher = REPLACE_QUOTE.matcher(input);
        input = matcher.replaceAll("&#39;");

        matcher = REPLACE_FORWARD_SLASH.matcher(input);
        input = matcher.replaceAll("&#x2F;");

        matcher = REPLACE_DOUBLE_QUOTE.matcher(input);
        input = matcher.replaceAll("&quot;");

        matcher = REPLACE_LESS_THAN.matcher(input);
        input = matcher.replaceAll("&lt;");

        matcher = REPLACE_GREATER_THAN.matcher(input);
        input = matcher.replaceAll("&gt;");

        return input;
    }
}
Escape characters that are considered to be special HTML characters. - Java java.lang

Description

Demo Code

Related Tutorials
