Java HTML Decode htmlDecode(String s)

Description

html Decode

License

Open Source License

Return

decoded text, ready to be printed as text replaces &, ", ', <, > and all whitespace

Declaration

public static String htmlDecode(String s) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2010 BSI Business Systems Integration AG.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors://from  w  ww. jav  a  2  s  . c o  m
 *     BSI Business Systems Integration AG - initial API and implementation
 ******************************************************************************/

public class Main {
    /**
     * @return decoded text, ready to be printed as text
     *         <xmp>replaces &, ", ', <, > and all whitespace</xmp>
     */
    public static String htmlDecode(String s) {
        if (s == null || s.length() == 0) {
            return s;
        }

        s = s.replace("&nbsp;", " ");
        s = s.replace("&quot;", "\"");
        s = s.replace("&apos;", "'");
        s = s.replace("&#39;", "'");
        s = s.replace("&lt;", "<");
        s = s.replace("&gt;", ">");
        s = s.replace("&amp;", "&");

        // whitespace patterns
        String zeroOrMoreWhitespaces = "\\s*?";
        String oneOrMoreWhitespaces = "\\s+?";

        // replace <br/> by \n
        s = s.replaceAll(
                "<" + zeroOrMoreWhitespaces + "br" + zeroOrMoreWhitespaces + "/" + zeroOrMoreWhitespaces + ">",
                "\n");
        // replace HTML-tabs by \t
        s = s.replaceAll("<" + zeroOrMoreWhitespaces + "span" + oneOrMoreWhitespaces + "style"
                + zeroOrMoreWhitespaces + "=" + zeroOrMoreWhitespaces + "\"white-space:pre\""
                + zeroOrMoreWhitespaces + ">&#9;<" + zeroOrMoreWhitespaces + "/" + zeroOrMoreWhitespaces + "span"
                + zeroOrMoreWhitespaces + ">", "\t");

        return s;
    }

    public static int length(String s) {
        if (s == null) {
            return 0;
        } else {
            return s.length();
        }
    }

    /**
     * replace plain text without using regex
     */
    public static String replace(String s, String sOld, String sNew) {
        sNew = (sNew == null ? "" : sNew);
        if (s == null || sOld == null) {
            return s;
        }
        return s.replace(sOld, sNew);
    }
}

Related

1. HTMLDecode(String s)
2. htmlDecode(String strSrc)
3. htmlDecoder(String content)
4. htmlEntityDecode(String s)
5. htmlEntityDecodeSingle(String s)