[Regular expression] validation of common fields

Regular expressions make it easy to match data or perform more complex string validation.

Here are some common fields of validation, summed up, will always be used in the future.

1 ImportJava.util.regex.Matcher;2 ImportJava.util.regex.Pattern;3 4  Public classValidate {5      //a check on birthdays6      //format: Yyyy-mm-dd7       Public Staticstring Isbirthday (string birthday) {8String errormsg= "";9String pat= "\\d{4}-\\d{1,2}-\\d{1,2}";TenPattern p=Pattern.compile (PAT); OneMatcher m=P.matcher (birthday); A          if(M.matches ()) { -errormsg= "Birthday format valid."; -}Else{ theerrormsg= "Birthday format is not legal."; -          } -          returnerrormsg; -      } +      -      //The verification of the account +      //format: Start of letter, allow 6-12 bytes, allow alphanumeric underline A       Public Staticstring Isusername (string username) { atString errormsg= ""; -String pat= "[a-za-z][a-za-z0-9_]{5,11}"; -Pattern p=Pattern.compile (PAT); -Matcher m=P.matcher (username); -          if(M.matches ()) { -errormsg= "account format is legal."; in}Else{ -errormsg= "account format is not legal."; to          } +          returnerrormsg; -      } the  *      //The check of QQ number $      //format: Starting from 10000 5-11 bitPanax Notoginseng       Public Staticstring Isqqnumber (String qqnumber) { -String errormsg= ""; theString pat= "[1-9][0-9]{4,10}"; +Pattern p=Pattern.compile (PAT); AMatcher m=P.matcher (qqnumber); the          if(M.matches ()) { +errormsg= "QQ number format is legal."; -}Else{ $errormsg= "QQ number format is not legal"; } $          returnerrormsg; -      } -  the      //verification of the mobile phone number -      //format: 13 145 147 15 18 StartWuyi       Public Staticstring Isphonenumber (String phonenumber) { theString errormsg= ""; -String pat= "(13[0-9]|14[5|7]|15[0|1|2|3|5|6|7|8| 9]|18[0|1|2|3|5|6|7|8| 9]) \\d{8} "; WuPattern p=Pattern.compile (PAT); -Matcher m=P.matcher (phonenumber); About          if(M.matches ()) { $errormsg= "mobile phone number format is legal."; -}Else{ -errormsg= "mobile phone number format is not legal."; -          } A          returnerrormsg; +      } the  -      //verification of the ID card number $       Public Staticstring Isidnumber (String idnumber) { theString errormsg= ""; theString pat= "\\d{15}|\\d{18}";  thePattern p=Pattern.compile (PAT); theMatcher m=P.matcher (idnumber); -          if(M.matches ()) { inerrormsg= "ID number format is legal."; the}Else{ theerrormsg= "ID number format is not valid."; About          } the          returnerrormsg; the      } the  +      //verification of e-mail -      //format: [email protected] the       Public Staticstring isaddress (string address) {BayiString errormsg= ""; theString pat= "\\w+ ([-+.] \\w+) *@\\w+ ([-.] \\w+) *\\.\\w+ ([-.] \\w+) * "; thePattern p=Pattern.compile (PAT); -Matcher m=P.matcher (address); -          if(M.matches ()) { theerrormsg= "e-mail format is legal."; the}Else{ theerrormsg= "e-mail format is not legal."; the          } -          returnerrormsg; the      } the  the      //Check for phone numbers94      //format: xxx-xxxxxxxx or xxxx-xxxxxxx the       Public Staticstring Isphone (String phone) { theString errormsg= ""; theString pat= "\\d{3}-\\d{8}|\\d{4}-\\d{7}";98Pattern p=Pattern.compile (PAT); AboutMatcher m=p.matcher (phone); -          if(M.matches ()) {101errormsg= "Phone number format is legal.";102}Else{103errormsg= "Phone number format is not legal.";104          } the          returnerrormsg;106      }107 108      //The verification of the postal code109      //China postcode is 6 digits the       Public Staticstring Ispostnumber (String postnumber) {111String errormsg= ""; theString pat= "[1-9]\\d{5} (?! \\d) ";113Pattern p=Pattern.compile (PAT); theMatcher m=P.matcher (postnumber); the          if(M.matches ()) { theerrormsg= "Postal code format is legal.";117}Else{118errormsg= "Postal code format is not valid.";119          } -          returnerrormsg;121      }122 123      //verification of Chinese names124      //There are more than two Chinese the       Public Staticstring Ischinesename (String chinesename) {126String errormsg= "";127String pat= "[\u4e00-\u9fa5]{2,}"; -Pattern p=Pattern.compile (PAT);129Matcher m=P.matcher (chinesename); the          if(M.matches ()) {131errormsg= "Chinese name format is valid."; the}Else{133errormsg= "Chinese name format is not valid.";134          }135          returnerrormsg;136      }137 138      //Verification of the website139       Public Staticstring Iswebsite (String website) { $String errormsg= "";141String pat= "http://([\\w-]+\\.) +[\\w-]+ (/[\\w-./?%&=]*)? $ ";142Pattern p=Pattern.compile (PAT);143Matcher m=P.matcher (website);144          if(M.matches ()) {145errormsg= "website format is legal.";146}Else{147errormsg= "website format is not valid.";148          }149          returnerrormsg; Max}
151}

[Regular expression] validation of common fields