[Java] simplifying the use of regular expressions

Use

Regexstring.with (string). Pattern (pattern). Start () + subsequent operations (matches,find or replace)

Source

 Packagecom;Importjava.util.Objects;ImportJava.util.regex.Matcher;ImportJava.util.regex.Pattern;/** * @author[email protected] for simplifying the processing of regular expressions*/ Public classregexstring {Privatestring string; Privatepattern pattern; PrivateMatcher Matcher; //////////////////////Constructor//////////////////////    /*** Regular Expression Object * *@paramSTR * Initialization string*/     Publicregexstring (String str) {setString (Objects.requirenonnull (str)); }    //////////////////////Normal Method//////////////////////    /*** Set the pattern of regular expressions * *@paramRegex * Regular expression statement *@returnregexstring*/     Publicregexstring pattern (String regex) {Setpattern (Pattern.compile (regex)); return  This; }    /*** Set the pattern of regular expressions * *@paramRegex * Regular expression statement *@paramflags * Regular Expression flag value *@returnregexstring*/     PublicRegexstring pattern (String regex,intflags)        {Setpattern (Pattern.compile (regex, flags)); return  This; }    /*** Regular expression objects begin to match (this statement is required to perform subsequent operations after the pattern is set) * *@returnregexstring*/     Publicregexstring Start () {Setmatcher (Pattern.matcher (string)); return  This; }    /*** Replace text with * *@paramReplacement * Text to replace *@returnthe replaced string*/     Publicstring Replace (string replacement) {returnGetmatcher (). ReplaceAll (replacement); }    /*** determine if match (all text at once, no step) * *@returnmatches the return true, and no match returns false. */     Public Booleanmatches () {returnGetmatcher (). matches (); }    /*** Determine if the match is matched (step into the text, please use the while loop) * *@returnReturns True, no return false found. */     Public Booleanfind () {returnGetmatcher (). find (); }    /*** When the Find () operation succeeds, the matching string can be obtained by matchstring () *@returnmatched string*/     PublicString matchstring () {returnGetmatcher (). Group (); }    /*** When the Find () operation succeeds, you can get the starting position of the match by Matchstart () *@returnThe starting position of the match*/     Public intMatchstart () {returnGetmatcher (). Start (); }    /*** When the Find () operation succeeds, the end position of the match can be obtained by matchend () *@returnThe starting position of the match*/     Public intMatchend () {returnGetmatcher (). end (); }    //////////////////////Static Method//////////////////////    /*** [static method] Convenient builder * *@paramSTR * Initialization String *@returnregexstring*/     Public Staticregexstring with (String str) {return Newregexstring (str); }    //////////////////////Getter & Setter//////////////////////     PublicString getString () {returnstring; }     Public voidsetString (String string) { This. String =string; }     PublicPattern Getpattern () {returnpattern; }     Public voidSetpattern (pattern pattern) { This. Pattern =pattern; }     PublicMatcher Getmatcher () {returnMatcher; }     Public voidSetmatcher (Matcher Matcher) { This. Matcher =Matcher; }}

Example

 Packagecom; Public classMain { Public Static voidMain (String args[]) {//Find Text{String src= "This is my small example string which I ' m going to use for pattern matching."; Regexstring string= Regexstring.with (src). Pattern ("\\w+"). Start ();  while(String.find ()) {System.out.println (String.matchstart () )+ "," + string.matchend () + ":" +string.matchstring ()); }        }                //Match{String src= "This is my small example string which I ' m going to use for pattern matching."; if(Regexstring.with (SRC). Pattern ("^this.+$"). Start (). Matches ()) {System.out.println ("Yes"); }        }        //Replace text{String src= "This is my small example string which I ' m going to use for pattern matching."; System.out.println (Regexstring.with (src). Pattern ("\\w+"). Start (). replace ("Regex")); }        //remove whitespace from the end of the string and extra strings in the middle of the string{String src= "This is my small example string which I ' m going to use for pattern matching. "; String tmp= Regexstring.with (src). Pattern ("^\\s+|\\s+$"). Start (). Replace (""); String des= Regexstring.with (TMP). Pattern ("\\s+"). Start (). Replace (""); System.out.println ("\" "+ des +" \ ""); }    }}

[Java] simplifying the use of regular expressions