Generate random password and mailbox, phone match

package com.alibaba.uyuni.common.util;import java.util.random;public class  generatepassword {    /**     *  Generate random passwords       *  @param  pwd_len     *  Total length of passwords generated       *  @return   Password Strings      */    public  Static string genrandomnum (Int pwd_len)  {        / / 26*2 Letters + 10 digits         final int maxNum = 62; Random numbers generated by         int i; //           int count = 0; //  the length of the password generated          char[] str = {  ' 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 ',  ' 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 ("");    &nbsP;    random r = new random ();         while  (Count < pwd_len)  {             //  generate random numbers, take absolute values, and prevent negative numbers from being generated,             i = math.abs (R.nextint (maxnum)); //  generates the largest number of 62-1             if  (i >= 0 && 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 {     /**      *  Verify email     *  @param  email email address, format: [email  protected],[email protected],xxx on behalf of mail service providers      *  @return   Verify successful return True , validation failed to return False     */     public static boolean  checkemail (String email)  {         String  regex =  "\\[email protected]\\w+\\. [A-z]+ (\\.[ a-z]+)? ";          return pattern.matches (Regex, email);      }          /**      *  Verify * * * Number      *  @param  idcard&nbsP; * * * Number 15 or 18 digits, the last one may be a number or a letter      *  @return   Verify success returns True, validation failed to return false      */     public static boolean checkidcard ( 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's number segment       *<p> Mobile Number segment: 134 (0-8), 135, 136, 137, 138, 139, 147 (expected for TD card)      *, 150, 151, 152, 157 (TD-only), 158, 159, 187 (not enabled), 188 (TD-specific) </p>     *<p> Unicom number segment: 130, 131, 132, 155, 156 (World Wind Only), 185 (not enabled), 186 (3g) &LT;/P&GT;&NBSP;&NBsp;   *<p> Telecom Number segment: 133, 153, 180 (not enabled), 189</p>     * @ return  validation returns True, validation failed to return false     */     public  Static boolean checkmobile (String mobile)  {          String regex =  "(\\+\\d+) 1[3458]\\d{9}$";          return pattern.matches (Regex,mobile);     }           /**     *  Verify fixed Phone numbers       *  @param  phone  phone number, Format: country/Region Phone code  +  area code  +  phone number, such as: + 8602085588447     * <p><b> Country (region)   code  :</b> The standard country (region) code for the country (region) that identifies the phone number. It contains one or more digits from  0  to  9 ,     *   digits followed by a space-delimited country/region code. </p>   &nbSp; * <p><b> Area code:</b> This may contain one or more numbers from  0  to  9 , area or city code placed in parentheses--      *  omit this component for countries (regions) that do not use a region or city code. </p>     * <p><b> Phone number:</b> This includes from  0  to  9   One or more digits  </p>     *  @return   Validation returns true successfully, validation failed to return false      */     public static boolean checkphone (String  phone)  {         String regex =  "(\\+\\ d+)? (\\d{3,4}\\-?)? \\d{7,8}$ ";          return pattern.matches (Regex, phone );     }          /**      *  validating integers (positive and negative integers)      *  @param  digit  One or more digits between 0-9 integers      *  @return &nbSP; validation returns true, validation failed to return false     */     public static  boolean checkdigit (string digit)  {          string regex =  "\\-? [1-9]\\d+];          return pattern.matches (regex,digit);      }          /**      *  verifying integers and floating-point numbers (plus and minus integers and positive and negative floating-point numbers)      *  @param  decimals  One or more 0-9 floating-point numbers, such as:1.23,233.30     *  @return   Verify success returns true, validation fails to return false      */     public static boolean checkdecimals ( String decimals)  {         string regex =   "\\-? [1-9]\\d+ (\\.\\d+)? ";          return pattern.matcheS (regex,decimals);     }            /**     *  verify whitespace characters      *  @param   blankspace  whitespace characters, including: spaces, \ t, \ n, \ r, \f, \x0b     *  @return   Verify successful return True, Validation failed to return false     */     public static boolean  Checkblankspace (String blankspace)  {         string  regex =  "\\s+";         return  Pattern.matches (Regex,blankspace);     }           /**     *  Verify Chinese      *  @param  chinese  Chinese characters      *  @return   validation returns true successfully, validation failed to return false      */     publIc static boolean checkchinese (String chinese)  {          String regex =  "^[\u4e00-\u9fa5]+$";          return pattern.matches (Regex,chinese);     }           /**     *  Verification Date (Month day)       *  @param  birthday  Date, format: 1992-09-03, or 1992.09.03     *  @return   Verify success returns True, validation failed to return false     */     public  Static boolean checkbirthday (String birthday)  {          String regex =  "[1-9]{4} ([-./]) \\d{1,2}\\1\\d{1,2}";          return pattern.matches (Regex,birthday);     }           /**     *  Verify the URL address      *   @param  url  format:http://blog.csdn.net:80/xyang81/article/details/7705960?  or  http:// www.csdn.net:80     *  @return   Verify success returns True, validation failed 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  URL  first-level domain name       * http://www.zuidaima.com/share/1550463379442688.htm ->> zuidaima.com     * </pre>     *       *  @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 postcode       *  @param  postcode  Postal Code      *  @return   Verify success returns TRUE, validation failure returns false      */     public static boolean  Checkpostcode (String postcode)  {         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   Verify success returns True, validation failed to return 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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Generate random password and mailbox, phone match