伪代码如下

public static String replaceLink(String strContent){
        
        Pattern pattern=null;
        Matcher matcher= null;
        if(strContent.indexOf("url")!=-1){
        String reGex="\\[url\\](http|https)(\\:\\/{2}\\w+\\.tt.cn.*?)\\[\\/url\\]";
        strContent = ubbReplace(strContent,reGex,"<a style=\"color:#5193C7;\"  href=\"$1$2\" target=\"_blank\" >$1$2 </a>",pattern,matcher,true);
        reGex="\\[url\\](http|https):(\\/{2}\\w+\\.\\w+\\.\\w+\\.\\w+.*?)\\[\\/url\\]";
        strContent = ubbItem(strContent,"xxxxxxxxxxx",true);
        }
        return strContent;
    }

public static String ubbReplace(String strContent,String re,String replayStr,Pattern pattern,Matcher matcher,boolean IgnoreCase) {
        if (IgnoreCase) {
            pattern = Pattern.compile(re,Pattern.CASE_INSENSITIVE);
        }else{
            pattern = Pattern.compile(re);
        }
        matcher = pattern.matcher(strContent);
        strContent = matcher.replaceAll(replayStr);
        return strContent;
}