java检查URL合法性

1.      /**
2.      * URL检查<br>
3.      * <br>
4.      * @param pInput     要检查的字符串<br>
5.      * @return boolean   返回检查结果<br>
6.      */
7.     public static boolean isUrl (String pInput) {
8.         if(pInput == null){
9.             return false;
10.         }
11.         String regEx = "^(http|https|ftp)//://([a-zA-Z0-9//.//-]+(//:[a-zA-"
12.             + "Z0-9//.&%//$//-]+)*@)?((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{"
13.             + "2}|[1-9]{1}[0-9]{1}|[1-9])//.(25[0-5]|2[0-4][0-9]|[0-1]{1}"
14.             + "[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)//.(25[0-5]|2[0-4][0-9]|"
15.             + "[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)//.(25[0-5]|2[0-"
16.             + "4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0"
17.             + "-9//-]+//.)*[a-zA-Z0-9//-]+//.[a-zA-Z]{2,4})(//:[0-9]+)?(/"
18.             + "[^/][a-zA-Z0-9//.//,//?//'///+&%//$//=~_//-@]*)*$";
19.         Pattern p = Pattern.compile(regEx);
20.         Matcher matcher = p.matcher(pInput);
21.         return matcher.matches();
22.     }