最近要写一个把用户输入的网址改为超链接的需求，最后用正则解决，匹配 可能的网址
果然还是要好好学学java的正则表达式，本例子使用java se 1.4新增的正则表达式 匹配 循环找出用户输入的字符串中可是是网址的子字符串，并且替换为带 a 标签。
private void getRealMsg(Stream ps){ String urlreg = "((http|https)://){0,1}[\\w]+[\\.:][\\w.!@#$%^?=&\\-\\+:*\\d/]+"; pattern = Pattern.compile(urlreg, Pattern.CASE_INSENSITIVE);String content = ps.getPushcontent();if(content.trim().length() < 4){return;}content = content.replaceAll("<script", "&lt;script");content = content.replaceAll("script>", "script&gt;");Matcher mac = pattern.matcher(content);ArrayList<String> list = new ArrayList<String>();ArrayList<String> rlist = new ArrayList<String>();String src = null;try {while(mac.find()){src = mac.group();list.add(src);}} catch (Exception e) {Logs.getLog(StreamDao.class).error(e);return;}if(list.size() < 1){return;}for(String s : list){rlist.add(content.substring(0, content.indexOf(s) + s.length()));content = content.substring(content.indexOf(s) + s.length(), content.length());}int i = 0;for(String s : list){if(s.startsWith("http")){rlist.set(i, rlist.get(i).replace(s, "<a href=\"" + s + "\" target=\"_blank\">" + s + "</a>"));}else{rlist.set(i, rlist.get(i).replace(s, "<a href=\"http://" + s + "\" target=\"_blank\">" + s + "</a>"));}i++;}StringBuilder sb = new StringBuilder();for(String s : rlist){sb.append(s);}ps.setPushcontent(sb.toString());}
写正则的必备网址啊，可以在线编辑正则，Flash实现~~~
http://gskinner.com/RegExr/
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