Extract string between two strings in java

Question

I try to get string between  lt    and     here is my implementation   String str    ZZZZL  lt    dsn   gt  AFFF  lt    AFG   gt    Pattern pattern   Pattern compile   lt          gt     String   result   pattern split str   System out println Arrays toString result      it return   ZZZZL    AFFF     But my expectation is     dsn   AFG     Where am i wrong and how to correct it

User · Answer

Jlordo approach covers specific situation. If you try to build an abstract method out of it, you can face a difficulty to check if 'textFrom' is before 'textTo'. Otherwise method can return a match for some other occurance of 'textFrom' in text.

Here is a ready-to-go abstract method that covers this disadvantage:

  /**
   * Get text between two strings. Passed limiting strings are not 
   * included into result.
   *
   * @param text     Text to search in.
   * @param textFrom Text to start cutting from (exclusive).
   * @param textTo   Text to stop cuutting at (exclusive).
   */
  public static String getBetweenStrings(
    String text,
    String textFrom,
    String textTo) {

    String result = "";

    // Cut the beginning of the text to not occasionally meet a      
    // 'textTo' value in it:
    result =
      text.substring(
        text.indexOf(textFrom) + textFrom.length(),
        text.length());

    // Cut the excessive ending of the text:
    result =
      result.substring(
        0,
        result.indexOf(textTo));

    return result;
  }

User · Answer

Your regex looks correct  but you re splitting with it instead of matching with it  You want something like this      Untested code Matcher matcher   Pattern compile   lt          gt    matcher str   while  matcher find          System out println matcher group

User · Answer

Your pattern is fine  But you shouldn t be split  ting it away  you should find   it  Following code gives the output you are looking for   String str    ZZZZL  lt    dsn   gt  AFFF  lt    AFG   gt    Pattern pattern   Pattern compile   lt          gt    Pattern DOTALL   Matcher matcher   pattern matcher str   while  matcher find          System out println matcher group 1

User · Answer

I have answered this question here  https   stackoverflow com a 38238785 1773972  Basically use  StringUtils substringBetween str    lt         gt       This requirs using  Apache commons lang  library  https   mvnrepository com artifact org apache commons commons-lang3 3 4  This library has a lot of useful methods for working with string  you will really benefit from exploring this library in other areas of your java code

[java] Extract string between two strings in java

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