Java String Truncate truncateText(String str, int lower, int upper, String appendToEnd)

Description

truncate Text

License

Apache License

Declaration

public static String truncateText(String str, int lower, int upper, String appendToEnd) 

Method Source Code

//package com.java2s;

public class Main {
    public static String truncateText(String str, int lower, int upper, String appendToEnd) {
        // strip markup from the string
        String str2 = removeHTML(str, false);

        // quickly adjust the upper if it is set lower than 'lower'
        if (upper < lower) {
            upper = lower;/* w  w  w . j av a 2s. c o m*/
        }

        // now determine if the string fits within the upper limit
        // if it does, go straight to return, do not pass 'go' and collect $200
        if (str2.length() > upper) {
            // the magic location int
            int loc;

            // first we determine where the next space appears after lower
            loc = str2.lastIndexOf(' ', upper);

            // now we'll see if the location is greater than the lower limit
            if (loc >= lower) {
                // yes it was, so we'll cut it off here
                str2 = str2.substring(0, loc);
            } else {
                // no it wasnt, so we'll cut it off at the upper limit
                str2 = str2.substring(0, upper);
                loc = upper;
            }
            // the string was truncated, so we append the appendToEnd String
            str = str2 + appendToEnd;
        }
        return str;
    }

    /**
     * Remove occurences of html, defined as any text between the characters
     * "&lt;" and "&gt;". Replace any HTML tags with a space.
     */
    public static String removeHTML(String str) {
        return removeHTML(str, false);
    }

    /**
     * Remove occurences of html, defined as any text between the characters
     * "&lt;" and "&gt;". Optionally replace HTML tags with a space.
     * 
     * @param str
     * @param addSpace
     * @return
     */
    public static String removeHTML(String str, boolean addSpace) {
        if (str == null)
            return "";
        StringBuffer ret = new StringBuffer(str.length());
        int start = 0;
        int beginTag = str.indexOf("<");
        int endTag = 0;
        if (beginTag == -1)
            return str;

        while (beginTag >= start) {
            if (beginTag > 0) {
                ret.append(str.substring(start, beginTag));

                // replace each tag with a space (looks better)
                if (addSpace)
                    ret.append(" ");
            }
            endTag = str.indexOf(">", beginTag);

            // if endTag found move "cursor" forward
            if (endTag > -1) {
                start = endTag + 1;
                beginTag = str.indexOf("<", start);
            }
            // if no endTag found, get rest of str and break
            else {
                ret.append(str.substring(beginTag));
                break;
            }
        }
        // append everything after the last endTag
        if (endTag > -1 && endTag + 1 < str.length()) {
            ret.append(str.substring(endTag + 1));
        }
        return ret.toString().trim();
    }
}

Related

1. truncateStringAt(String source, int len)
2. truncateStringChars(String strIn, String substituteChars, int maxChars, boolean keepRightSide)
3. truncateStringToUtf8(final String original, final int maxBytes)
4. truncateSubjectText(String subject)
5. truncateTestName(String test)
6. truncateText(String text, int maxCharLength)
7. truncateTime(String dateString)
8. truncateToFirstLine(String string)
9. truncateToLength(String inputString, int truncateLength)