java正则点匹配到换行符

private static List<String> getStrings(String str) {
		String reg2 = "<DOC(.+?)</DOC>";
        Pattern p = Pattern.compile(reg2, Pattern.CASE_INSENSITIVE | Pattern.DOTALL);
        Matcher m = p.matcher(str);
        ArrayList<String> strs = new ArrayList<String>();
        while (m.find()) {
            strs.add(m.group(0));            
        }
        return strs;
    }

/** 
 * 包含回车换行符的处理 
 */  
public void testb(){  
    String result = teststr.replaceAll("(?s)'.*?'", "");          
    System.out.println("result:" + result);   
}