Java random password generation and matching with mailbox, mobile phone number _java

Nonsense not to say, directly to everyone to paste the Java code, the code has commented, write a bad, but also please everyone a lot of attention.

The code looks like this:

Package com.alibaba.uyuni.common.util;
Import Java.util.Random; public class Generatepassword {/** * generate random password * @param pwd_len * Total length of password generated * @return password string/public static string Genrand Omnum (int pwd_len) {///26*2 Letter + 10 number final int maxnum = n; int i;//generated random number int count = 0;/////////////////////////////////////  ', ' B ', ' C ', ' D ', ' E ', ' F ', ' G ', ' H ', ' I ', ' J ', ' K ', ' L ', ' M ', ' N ', ' O ', ' P ', ' Q ', ' R ', ' S ', ' T ', ' U ', ' V ', ' W ', ' X ', ' Y ', ' Z ', ' A ', ' B ', ' C ', ' d ', ' e ', ' f ', ' g ', ' h ', ' I ', ' j ', ' K ', ' l ', ' m ', ' n ', ' o ', ' P ', ' Q ', ' R ', ' s ', ' t ', ' u ', ' V ', ' w ', '
X ', ' y ', ' z ', ' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 '};
StringBuffer pwd = new StringBuffer ("");
Random r = new Random (); while (Count < Pwd_len) {//Generate random numbers, take absolute values to prevent negative numbers from being generated, I = Math.Abs (R.nextint (Maxnum));//Generate maximum number of 62-1 if (i >= 0 &&amp ;
I < str.length) {pwd.append (str[i]); count++;}
return pwd.tostring (); public static void Main (string[] args) {System.out.println (Genrandomnum (6));/}} Package com.alibaba.uyuni.coMmon.util;
Import Java.util.regex.Matcher;
Import Java.util.regex.Pattern; public class Regexutils {/** * Authentication email * @param email email address, format: zhangsan@zuidaima.com,zhangsan@xxx.com.cn,xxx representative Mail Service provider * Return validation successfully returns true, validation fails return false/public static Boolean Checkemail (String email) {String regex = ' \\w+@\\w+\\.[ a-z]+ (\\.[ 
a-z]+)? "; 
Return pattern.matches (regex, email); /** * Verify * * * * @param idcard Resident * * * Number 15 or 18 digits, the last one may be a number or letter * @return validation successfully returns TRUE, validation failure returns false */public static Boolean CH 
Eckidcard (String idcard) {string regex = ' [1-9]\\d{13,16}[a-za-z0-9]{1} '; 
Return pattern.matches (Regex,idcard); /** * Verify mobile phone number (support international format, +86135xxxx ...) (Mainland China), +00852137xxxx ... (Hong Kong, China) * @param Mobile Mobile, Unicom, telecom operator number segment *<p>: 134 (0-8), 135, 136, 137, 138, 139, 147 (expected for TD Internet Card) *, 150, 151, 152, 157 (TD-specific), 158, 159, 187 (not enabled), 188 (TD-specific) </p> *<p> Unicom segment: 130, 131, 132, 155, 156 (World Wind Dedicated), 185 (not enabled), 186 (3g) </ P> *<p> Telecom Number: 133, 153, 180 (not enabled), 189</p> * @return validation successfully returns true, validation fails return false/public static boolEan Checkmobile (String mobile) {string regex = "(\\+\\d+)? 1[3458]\\d{9}$"; 
Return pattern.matches (Regex,mobile); /** * Verify the fixed phone number * @param phone phone number, format: Country (region) telephone code + area code (city code) + telephone number, such as: +8602085588447 * <p><b> Country (region) code:< /b> the standard country (region) code for the country (region) that identifies the phone number. It contains one or more digits from 0 to 9, and the number is followed by a space-delimited country (region) code. </p> * <p><b> Area code (city codes):</b> this may contain one or more digits from 0 to 9, the region or city code is placed in parentheses--* the country (region) that does not use the region or city code, the component is omitted. </p> * <p><b> Phone number:</b> This contains one or more digits from 0 to 9 </p> * @return Validation successfully returns TRUE, validation failure returns false */public s Tatic Boolean Checkphone (String phone) {string regex = ' (\\+\\d+)? ( \\d{3,4}\\-?)? 
\\d{7,8}$ "; 
Return pattern.matches (regex, phone); /** * validating integers (positive and negative integers) * @param digit Integer * between one or more than 0-9 * @return validation returns true successfully, validation failure returns false */public static Boolean Checkdigit ( String digit) {string regex = ' \\-?[ 
1-9]\\d+ "; 
Return pattern.matches (Regex,digit); /** * verifies integers and floating-point numbers (positive and negative integers) * @param decimals a floating-point number between one or more digits, such as: 1.23,233.30 * @return Validation returns true successfully, validation fails back to FALSE/public static Boolean Checkdecimals (String decimals) {string regex = ' \\-?[ 
1-9]\\d+ (\\.\\d+)? "; 
Return pattern.matches (regex,decimals);  /** * Verify White-space characters * @param blankspace White-space characters, including: spaces, \ \ n, \ r, \f, \x0b * @return Validation returns true successfully, validation failure returns false */public static Boolean 
Checkblankspace (String blankspace) {string regex = ' \\s+ '; 
Return pattern.matches (Regex,blankspace); /** * Verify that Chinese * @param Chinese characters * @return validation returns true successfully, validation fails return false/public static Boolean Checkchinese (String Chinese 
{String regex = ' ^[\u4e00-\u9fa5]+$ '; 
Return pattern.matches (Regex,chinese); /** * Validation date (month/year) * @param birthday date, format: 1992-09-03, or 1992.09.03 * @return validation returns true successfully, validation fails return false/public static Boole 
An checkbirthday (string birthday) {string regex = "[1-9]{4} ([-./]) \\d{1,2}\\1\\d{1,2}"; 
Return pattern.matches (Regex,birthday); /** * Verify URL address * @param URL format: http://blog.csdn.net:80/xyang81/article/details/7705960? or http://www.csdn.net:80 * @return validation successfully returns true, validation fails to return FALSE */public static Boolean checkurl (string url) {string regex = ' (https?:/ /(w{3}\\.)? \\w+\\.\\w+ (\\.[ a-za-z]+) * (: \\d{1,5})? (/\\w*) * (\??) (.+=.*)? 
(&.+=.*)? "; 
Return pattern.matches (regex, url); /** * <pre> * Get URL of the first level domain name * http://www.zuidaima.com/share/1550463379442688.htm->> zuidaima.com * </p re> * * @param URL * @return/public static String getdomain (string url) {Pattern p = pattern.compile (? <=http: //|\\.) [^.] *?\\.
(COM|CN|NET|ORG|BIZ|INFO|CC|TV) ", pattern.case_insensitive); Get the full domain name//pattern P=pattern.compile ("[^//]*?\\.
COM|CN|NET|ORG|BIZ|INFO|CC|TV) ", pattern.case_insensitive);
Matcher Matcher = p.matcher (URL);
Matcher.find ();
return Matcher.group (); /** * Matching China postal code * @param postcode postal code * @return Validation returns true successfully, validation fails return false */public static Boolean Checkpostcode (String PO 
Stcode) {String regex = ' [1-9]\\d{5} '; 
Return Pattern.matches (regex, postcode); /** * Match IP address (simple match, format, such as: 192.168.1.1,127.0.0.1, no matching IP segment size) * @param ipaddress IPV4 standard address * @return validatedWork returns TRUE, validation failure returns false */public static Boolean checkipaddress (String ipaddress) {string regex = ' [1-9] (\\d{1,2})? \. ( 0| ([1-9] (\\d{1,2})) \\. (0| ([1-9] (\\d{1,2})) \\. (0| 
([1-9] (\\d{1,2})) "; 
Return pattern.matches (Regex, IPAddress); } 
}

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