Improve code to replaceAll String

Question

Is there another way to do a lot of 'replaceAll' more efficiently, using as less memory as possible?

 public static String cleanWordTags(String source) {

    String copy = source;

    copy = copy.replaceAll("<P style=\"M[^>]*>", "<P>");
    copy = copy.replaceAll("<p style=\"M[^>]*>", "<p>");
    copy = copy.replaceAll("<p style=\"T[^>]*>", "<p>");

    copy = copy.replaceAll("<b style=[^>]*>", "<b>");

    copy = copy.replaceAll("<span class=\"M[^>]*>", "<span>");
    copy = copy.replaceAll("<span style='m[^>]*>", "<span>");
    copy = copy.replaceAll("<span style=\"f[^>]*>", "<span>");
    copy = copy.replaceAll("<span lang[^>]*>", "<span>");
    copy = copy.replaceAll("<span style=\"color[^>]*>", "<span>");
    copy = copy.replaceAll("<span style=\"m[^>]*>", "<span>");
    copy = copy.replaceAll("<span style=\"line[^>]*>", "<span>");
    copy = copy.replaceAll("<span style=\"L[^>]*>", "<span>");
    copy = copy.replaceAll("<span style=\"T[^>]*>", "<span>");
    copy = copy.replaceAll("<span style=\"t[^>]*>", "<span>");

    copy = copy.replaceAll("<br [^>]*>", "<br/>");

    copy = copy.replaceAll("<i style=[^>]*>", "");
    copy = copy.replaceAll("</i>", "");

    copy = copy.replaceAll("<st1:personname[^>]*>", "");
    copy = copy.replaceAll("</st1:personname>", "");

    copy = copy.replaceAll("<st1:metricconverter[^>]*>", "");
    copy = copy.replaceAll("</st1:metricconverter>", "");

    copy = copy.replaceAll("<br[^>]*>", "<br/>");

    copy = copy.replaceAll("<\\W\\Wendif\\W\\W\\W>", "");

    copy = copy.replaceAll("<![^>]*>", "");


    copy = copy.replaceAll("<[vowm]:[^>]*>", "");
    copy = copy.replaceAll("</[vowm]:[^>]*>", ""); //&

    copy = copy.replaceAll("&(amp|lt|gt);", "");
    copy = copy.replaceAll("&nbsp;", "");

    copy = copy.replaceAll("<img width[^>]*>", "");
    copy = copy.replaceAll("<img src=\"file:[^>]*>", "");


    return copy;
}

I found I can use StringUtils.replace instead replaceAll, but this only works for strings without regex.

Thanks!!!

New:

I tried with the next code related with comments but takes 5 times more time to replace the same String:

 public static String cleanWordTags(String source) {
        String copy = source;

        long t0 = System.currentTimeMillis();

        String regex = "";

        regex += "(align=\"left\")";
        regex += "|(<mce:style>)";
        regex += "|(<i>)";
        regex += "|(<i style=[^>]*>)";
        regex += "|(</i>)";
        regex += "|(<st1:personname[^>]*>)";
        regex += "|(</st1:personname>)";
        regex += "|(<st1:metricconverter[^>]*>)";
        regex += "|(</st1:metricconverter>)";
        regex += "|(<\\W\\Wendif\\W\\W\\W>)";
        regex += "|(<![^>]*>)";
        regex += "|(<[vowm]:[^>]*>)";
        regex += "|(</[vowm]:[^>]*>)";
        regex += "|(&(amp|lt|gt);)";
        regex += "|(&nbsp;)";

        regex += "|(<img width[^>]*>)";
        regex += "|(<img src=\"file:[^>]*>)";

        Pattern p = Pattern.compile(regex);
        copy = p.matcher(copy.toUpperCase()).replaceAll("");

        regex = "";
        regex += "(<span style=\"t[^>]*>)";
        regex += "|(<span style=\"T[^>]*>)";
        regex += "|(<span style=\"L[^>]*>)";
        regex += "|(<span style=\"line[^>]*>)";
        regex += "|(<span style=\"m[^>]*>)";
        regex += "|(<span style=\"color[^>]*>)";
        regex += "|(<span lang[^>]*>)";
        regex += "|(<span style=\"f[^>]*>)";
        regex += "|(<span style='m[^>]*>)";
        regex += "|(<span class=\"M[^>]*>)";

        p = Pattern.compile(regex);
        copy = p.matcher(copy.toUpperCase()).replaceAll("");

        copy = copy.replaceAll("<br[^>]*>", "<br/>");

        //Sustituir
        //        copy = copy.replaceAll("<p class=[^>]*>", "<p>");
        //  copy = copy.replaceAll("<p align=[^>]*>", "<p>");
        copy = copy.replaceAll("<P style=\"M[^>]*>", "<P>");
        copy = copy.replaceAll("<p style=\"M[^>]*>", "<p>");
        copy = copy.replaceAll("<p style=\"T[^>]*>", "<p>");
        copy = copy.replaceAll("<b style=[^>]*>", "<b>");

        System.out.println(System.currentTimeMillis() - t0);

        return copy;
    }

Answer 1

At the end the only solution I found was to replace all the "replaceAll" without regex for "replace" and try to generalize the regex.

Thanks a lot!!!