Java Regular Expression Application Java read the file and get the phone number _java

implementation function: read the file, put the phone number in a set return.

Method Introduction:

Find (): attempts to locate the next subsequence of the input sequence that matches the pattern.

Group (): returns the input subsequence matched by the previous matching operation.

1. Get the phone number from a string

Import Java.util.HashSet;
Import Java.util.Set;
Import Java.util.regex.Matcher;

Import Java.util.regex.Pattern;  /** * Intercepts the phone number from the string * @author ZCR * */public class Checkifisphonenumber {/** * Regular expression for phone number: including fixed telephone and mobile phone *     Compliant Number: * 1, mobile phone * 86+ '-' + 11-digit phone number * 86+11 normal phone number * 11-bit normal phone number A * (+86) + 11-digit phone number * (86) + 11-bit phone number * 2, fixed telephone * area code + '-' + fixed telephone + '-' + extension # * Area code + '-' + fixed telephone * Area code + fixed Telephone * @
    
    Return phone number Regular expression */public static string Isphoneregexp () {String regexp = ""; Can meet the longest match, but cannot complete the space between the country area number and telephone number String mobilephoneregexp = "(?:( \ \ (\\+?86\\)) ((13[0-9]{1}) | ( 15[0-9]{1}) | (18[0,5-9]{1})) +\\D{8}) | "+" (?: 86-? ( (13[0-9]{1}) | (15[0-9]{1}) | (18[0,5-9]{1})) +\\D{8}) | "+" (?:( (13[0-9]{1}) | (15[0-9]{1}) | (18[0,5-9]{1}))
    
    
    
    +\\D{8}) ";
    System.out.println ("regexp =" + mobilephoneregexp); Fixed-line Regular expression String landlinephoneregexp = "(?:( \\(\\+?86\\)) (0[0-9]{2,3}\\-?)? ([2-9][0-9]{6,7}) + (\\-[0-9]{1,4}) | " +
        "(?:( 86-?)? (0[0-9]{2,3}\\-?)?  

    ([2-9][0-9]{6,7}) + (\\-[0-9]{1,4}) "; 
  
    RegExp = "(?:" + Mobilephoneregexp + "|" + Landlinephoneregexp + ")";
  return regexp;
   /** * Obtain all phone numbers (fixed and mobile) from Datastr, put them into set * @param datastr the string to look for * @param the phone number in Phoneset datastr 
    /public static void Getphonenumfromstrintoset (String datastr,set<string> phoneset) {//Get regular expressions for fixed phone and mobile phone
    
    String regexp = Isphoneregexp ();
    
    System.out.println ("Regexp =" + Regexp); 
    Pattern pattern = pattern.compile (regexp); 

    Matcher Matcher = Pattern.matcher (DATASTR); Find the next subsequence of the input sequence that matches the pattern while (Matcher.find ()) {//Get the previously found string and add it to the set Phoneset.add (Matcher.group) (
    ));
  }//system.out.println (Phoneset);
 }
}

2, read the file and call the phone number to obtain the
implementation: read the file by the file path, and fetch the phone number in the line

Import Java.io.BufferedReader;
Import Java.io.File;
Import Java.io.FileInputStream;
Import Java.io.InputStreamReader;
Import java.util.ArrayList;
Import Java.util.HashSet;
Import java.util.List;



Import Java.util.Set;
   /** * Reads the file operation * * * @author ZCR * */public class ImportFile {/** * reads the file, reads the phone number in the file, and saves it in the set.  * @param the absolute path of the FilePath file * @return The phone number contained in the file/public static set<string> Getphonenumfromfile (String
    
    FilePath) {set<string> phoneset = new hashset<string> ();
      try {String encoding = "UTF-8";
      File File = new file (FilePath);
            if (File.isfile () && file.exists ()) {//To determine if the file exists inputstreamreader read = new InputStreamReader ( 
        New FileInputStream (file), encoding)//Considering the encoding grid BufferedReader BufferedReader = new BufferedReader (read);

        String linetxt = null; while ((Linetxt = Bufferedreader.readline ())!= null) {//read a row in the file, the electricThe words number is added to the Phoneset checkifisphonenumber.getphonenumfromstrintoset (Linetxt, Phoneset);
      } read.close ();
      else {System.out.println ("The specified file cannot be found");
      The catch (Exception e) {System.out.println ("Error reading file contents");
    E.printstacktrace ();
  return phoneset;
 }

}

3, testing

public static void Main (String argv[])
  {
    string filePath = "F:\\three.txt";  
    
    set<string> Phoneset = Getphonenumfromfile (FilePath);
    
    SYSTEM.OUT.PRINTLN ("Telephone set:" + Phoneset);
  }

Data in File:

Results:

Telephone set: [86132221, (86) 13222144332, 86-13222144332, 32434343, (+86) 13222144332, 13888888888]

The above is the implementation of the entire application process, I hope you through this case, the Java regular expression used more skilled.