java字符串使用问题

我现在有一个字符串，保存了文件路径例如：c:\config\config.xml

我如何分别取得文件名‘config.xml’和路径名'c:\config\'

---

这样
Java code:

public static void main(String[] args) throws Exception {
String s = "c:/config/config.xml";
Matcher m = Pattern.compile(".*/").matcher(s);
while (m.find()) {
System.out.println(m.group());
System.out.println(s.substring(m.end(), s.length()));
}
}

---

或者
Java code:

public static void main(String[] args) throws Exception {
String s = "c:/config/config.xml";
Matcher m = Pattern.compile("(.*)/(.*)").matcher(s);
while (m.find()) {
System.out.println(m.group(1));
System.out.println(m.group(2));
}
}

---

Java code:
public static void main(String[] args) {

String str = "c:\\config\\config.xml";

String str1 = "",str2="";
str1 = str.substring(0, str.lastIndexOf("\\")+1);
Syst