public boolean isValidIP(String ip){
String[] numbers = ip.split(".");
for(int i=0;i<numbers.length;i++){
int number = Integer.parseInt(numbers[i]);
if((number<0)||(number>255)) return false;
}
return true;
}
String[] numbers = ip.split(".");
for(int i=0;i<numbers.length;i++){
int number = Integer.parseInt(numbers[i]);
if((number<0)||(number>255)) return false;
}
return true;
}
String[] numbers = ip.split(".");
if (numbers.length!=4) return false;
for(int i=0;i<numbers.length;i++){
int number = Integer.parseInt(numbers[i]);
if((number<0)||(number>255)) return false;
}
return true;
}
String regex0="(2[0-4]\\d)" + "|(25[0-5])";
String regex1="1\\d{2}";
String regex2="[1-9]\\d";
String regex3="\\d";
String regex="("+regex0+")|("+regex1+")|("+regex2+")|("+regex3+")";
regex="("+regex+").("+regex+").("+regex+").("+regex+")";
Pattern p=Pattern.compile(regex);
Matcher m=p.matcher(s);
return m.matches();
}
ipv4::=([0-1][0-9][0-9]|2[0-5][0-5]).([0-1][0-9][0-9]|2[0-5][0-5]).([0-1][0-9][0-9]|2[0-5][0-5]).([0-1][0-9][0-9]|2[0-5][0-5]);
ipv6的正规式好像有好几种形式的,忘了。呵呵
String regex0="(2[0-4]\\d)" + "|(25[0-5])";
String regex1="1\\d{2}";
String regex2="[1-9]\\d";
String regex3="\\d";
String regex="("+regex0+")|("+regex1+")|("+regex2+")|("+regex3+")";
regex="("+regex+")\\.("+regex+")\\.("+regex+")\\.("+regex+")";
Pattern p=Pattern.compile(regex);
Matcher m=p.matcher(s);
return m.matches();
}