String str="........";
        Pattern p = Pattern.compile(".+\\。|.{100}|.+");
        for(;str.length()!=0;) {
            String test = null;
            if(str.length()>=100) {
                test = str.substring(0, 100);
            }
            else {
                test = str;
            }
            Matcher m = p.matcher(test);
            while(m.find()) {
                System.out.println(m.group());
                test = m.group();
                break;
            }
            str = str.substring(test.length(), str.length());
        }