Java 判斷是否合法ip
private boolean checkIP(String str) {
Pattern pattern = Pattern
.compile("^((\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5]"
+ "|[*])\\.){3}(\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5]|[*])$");
return pattern.matcher(str).matches();
}