Java Regular Expression

1. Verify your ID card

public static boolean checkIdentityCard(String identity_card){String pattern = "((11|12|13|14|15|21|22|23|31|32|33|34|35|36|37|41|42|43|44|45|46|50|51|52|53|54|61|62|63|64|65|71|81|82|91)\\d{4})((((19|20)(([02468][048])|([13579][26]))0229))|((20[0-9][0-9])|(19[0-9][0-9]))((((0[1-9])|(1[0-2]))((0[1-9])|(1\\d)|(2[0-8])))|((((0[1,3-9])|(1[0-2]))(29|30))|(((0[13578])|(1[02]))31))))((\\d{3}(x|X))|(\\d{4}))";  Pattern p = Pattern.compile(pattern);  Matcher m = p.matcher(identity_card);  return m.matches();}

2. Verify that the IP address is in the same segment

/*** Verify whether the two IP addresses are in the same segment * @ Param ipstr * @ return */Public Boolean checkip (string ipstr) {pattern = pattern. compile ("\ B ((?! \ D) \ D + | 1 \ D \ d | 2 [0-4] \ d | 25 [0-5]) \\. ((?! \ D) \ D + | 1 \ D \ d | 2 [0-4] \ d | 25 [0-5]) \\. ((?! \ D) \ D + | 1 \ D \ d | 2 [0-4] \ d | 25 [0-5]) \\. ((?! \ D) \ D + | 1 \ D \ d | 2 [0-4] \ d | 25 [0-5]) \ B "); // string ipstr =" 192.168.1.12/192.168.1.12 "; string [] STR = ipstr. split ("/"); If (Str. length = 2) {matcher = pattern. matcher (STR [0]); matcher matcher1 = pattern. matcher (STR [1]); If (matcher. matches () = true & matcher1.matches () = true) {// verify valid int I = STR [0]. lastindexof (". "); // get the last one. string ip0_1 = STR [0] at the position of the string. substring (0, I); // the first three paragraphs int ip0_4 = integer. valueof (STR [0]. substring (I + 1, STR [0]. length (); // system. out. println (ip0_1 + "====" + ip0_4); Int J = STR [1]. lastindexof (". "); string ip1_1 = STR [1]. substring (0, I); int ip1_4 = integer. valueof (STR [1]. substring (I + 1, STR [1]. length (); // system. out. println (ip1_1 + "======" + ip1_4); If (ip0_1.equals (ip1_1) & ip0_4 <= ip1_4) {return true ;}} return false ;}