private static String pattern = "^([\\d.]+) (\\S+) (\\S+) \\[([\\w:/]+\\s[+\\-]\\d{4})\\] \"(.+?)\" (\\d{3}) (\\d+|-) \"([^\"]+)\" \"([^\"]+)\"";
//静态方法获取Pattern对象
private static Pattern p = Pattern.compile(pattern);
//line是待验证的字符串
Matcher matcher = p.matcher(line);
//匹配成功
if (matcher.matches()){
...
}
原文：http://www.cnblogs.com/mrxiaohe/p/5282093.html