Java String Quote quoteHtmlContent(String x)

Description

Replace special characters with entities for HTML content.

License

Open Source License

Parameter

Parameter	Description
x	string to quote

Return

equivilent string using entities for any special chars

Declaration

static public String quoteHtmlContent(String x) 

Method Source Code

//package com.java2s;

public class Main {
    private static final char[] htmlIn = { '&', '"', '\'', '<', '>', '\n' };
    private static final String[] htmlOut = { "&amp;", "&quot;", "&#39;",
            "&lt;", "&gt;", "\n<p>" };

    /**/*from   w ww.j a va 2  s.  c  o m*/
     * Replace special characters with entities for HTML content.
     * special: '&', '"', '\'', '<', '>', '\n'
     *
     * @param x string to quote
     * @return equivilent string using entities for any special chars
     */
    static public String quoteHtmlContent(String x) {
        return replace(x, htmlIn, htmlOut);
    }

    /**
     * Replace any char "out" in s with "in".
     *
     * @param s   string to replace
     * @param out repalce this character
     * @param in  with this string
     * @return modified string if needed
     */
    static public String replace(String s, char out, String in) {
        if (s.indexOf(out) < 0) {
            return s;
        }

        // gotta do it
        StringBuilder sb = new StringBuilder(s);
        replace(sb, out, in);
        return sb.toString();
    }

    /**
     * Replace all ocurrences of any char in replaceChar with corresponding String in replaceWith
     *
     * @param x           operate on this string
     * @param replaceChar get rid of these
     * @param replaceWith replace with these
     * @return resulting string
     */
    static public String replace(String x, char[] replaceChar,
            String[] replaceWith) {
        // common case no replacement
        boolean ok = true;
        for (int i = 0; i < replaceChar.length; i++) {
            int pos = x.indexOf(replaceChar[i]);
            ok = (pos < 0);
            if (!ok) {
                break;
            }
        }
        if (ok) {
            return x;
        }

        // gotta do it
        StringBuilder sb = new StringBuilder(x);
        for (int i = 0; i < replaceChar.length; i++) {
            int pos = x.indexOf(replaceChar[i]);
            if (pos >= 0) {
                replace(sb, replaceChar[i], replaceWith[i]);
            }
        }

        return sb.toString();
    }

    /**
     * Replaces all occurrences of "pattern" in "string" with "value"
     *
     * @param string  string to munge
     * @param pattern pattern to replace
     * @param value   replacement value
     * @return munged string
     */
    public static String replace(String string, String pattern, String value) {
        if (pattern.length() == 0)
            return string;

        StringBuilder returnValue = new StringBuilder();
        int patternLength = pattern.length();
        while (true) {
            int idx = string.indexOf(pattern);
            if (idx < 0) {
                break;
            }
            returnValue.append(string.substring(0, idx));
            if (value != null) {
                returnValue.append(value);
            }
            string = string.substring(idx + patternLength);
        }
        returnValue.append(string);
        return returnValue.toString();
    }

    /**
     * Replace any char "out" in sb with String "in".
     *
     * @param sb  StringBuilder to replace
     * @param out repalce this character
     * @param in  with this string
     */
    static public void replace(StringBuilder sb, char out, String in) {
        for (int i = 0; i < sb.length(); i++) {
            if (sb.charAt(i) == out) {
                sb.replace(i, i + 1, in);
                i += in.length() - 1;
            }
        }
    }

    /**
     * Replace any of the characters from out with corresponding character from in
     *
     * @param sb  the StringBuilder
     * @param out get rid of any of these characters
     * @param in  replacing with the character at same index
     */
    static public void replace(StringBuilder sb, String out, String in) {
        for (int i = 0; i < sb.length(); i++) {
            int c = sb.charAt(i);
            for (int j = 0; j < out.length(); j++) {
                if (out.charAt(j) == c)
                    sb.setCharAt(i, in.charAt(j));
            }
        }
    }
}

Related

1. quoteForXML(String from)
2. quoteHost(final String hostname)
3. quoteHtml(final String s)
4. quoteHtml(String s)
5. quoteHTML(String string)
6. quoteIdentifier(String identifier)
7. quoteIdentifier(String identifier, boolean isPedantic)
8. quoteIdentifier(String identifier, boolean isPedantic)
9. quoteIdentifier(String identifier, String quoteChar)