java正则匹配任意字符（包括换行回车）

ref

以下为正确的正则表达式匹配规则：([\s\S]*)
同时，也可以用 “([\d\D]*)”、“([\w\W]*)” 来表示。
Pattern p=Pattern.compile(".*([\\s\\S]*)");
 /**
     * Enables dotall mode.
     *
     * 
 In dotall mode, the expression . matches any character,
     * including a line terminator.  By default this expression does not match
     * line terminators.
     *
     * 
 Dotall mode can also be enabled via the embedded flag
     * expression (?s).  (The s is a mnemonic for
     * "single-line" mode, which is what this is called in Perl.)  
     */
String s="balabala\r\n\tsomehead\r\n\t\r\n\t\r\n\t\r\n";
Pattern p=Pattern.compile(".*(.*)",Pattern.DOTALL);
   
Matcher m = p.matcher(s);
if (m.find()) {
    String matchedText = m.group();
    int matchedFrom = m.start();
    int matchedTo = m.end();
    System.out.println("matched [" + matchedText + "] " +
                       "from " + matchedFrom +
                       " to " + matchedTo + "."+ m.group(1));
} else {
    System.out.println("didn't match");
}