如何获取字符串中匹配到正则表达式的子串开始下标如题啊.求指点. 比如
String url="www.baidu.123.com";String reg="[0-9]{1,3}";
Pattern p = Pattern.compile("a"); Matcher m = p.matcher("aaaaab"); while(m.find()){ System.out.println(m.start()); }