java正则表达式获取指定HTML标签的指定属性值且替换

public static String repDomain(String source, String domain, String element, String attr) {        String img = "";        Pattern p_image;        Matcher m_image;        String regEx_img = "<" + element + "[^<>]*?\\s" + attr + "=['\"]?(.*?)['\"]?(\\s.*?)?>";         p_image = Pattern.compile(regEx_img, Pattern.CASE_INSENSITIVE);        m_image = p_image.matcher(source);        while (m_image.find()) {            img = m_image.group();            Matcher m = Pattern.compile("href\\s*=\\s*\"?(.*?)(\"|>|\\s+)").matcher(img);            while (m.find()) {                String srcVal = m.group(1);                if(srcVal.indexOf("/@tenant")>=0){                int idx = srcVal.indexOf("/@tenant");                StringBuffer temp = new StringBuffer();                String dstVal = temp.append(domain).append(srcVal.substring(idx+1)).toString();                source = source.replace(srcVal, dstVal);                }            }        }        return source;    }