public static void main(String[] args) {
        String[] ss = { "ksu<a001>sdf<a002>", "dd<a001>dsdf<sdf",
                "dsdf<dsfsaf<a001>","sdfadf<<a001>sdfsf<>sdfdfa<sdfasdfadf>>sdiep>" };
        String s1 = "(<\\w{0,}>)";
        Pattern p = Pattern.compile(s1);
        for (String s : ss) {
            System.out.println("==========");
            //找到<>,<a001>格式的字符串
            Matcher m = p.matcher(s);
            int point = 0;
            while (m.find()) {
                int start = m.start();
                int end = m.end();
                
                if (point == start)
                {
                    System.out.println();
                }
                else
                {
                    System.out.println(s.substring(point,start));
                }
                System.out.println(m.group());
                point = end;
            }
            if (point != s.length())
            {
                System.out.println(s.substring(point,s.length()));
            }
        }
    }