How to read a file in Groovy into a string

Question

I need to read a file from the file system and load the entire contents into a string in a groovy controller  what s the easiest way to do that

User · Answer

In my case new File   doesn t work  it causes a FileNotFoundException when run in a Jenkins pipeline job  The following code solved this  and is even easier in my opinion   def fileContents   readFile  path to file    I still don t understand this difference completely  but maybe it ll help anyone else with the same trouble  Possibly the exception was caused because new File   creates a file on the system which executes the groovy code  which was a different system than the one that contains the file I wanted to read

User · Answer

the easiest way would be  new File filename  getText    which means you could just do   new File filename  text

User · Answer

String fileContents   new File   path to file   text   If you need to specify the character encoding  use the following instead   String fileContents   new File   path to file   getText  UTF-8

User · Answer

The shortest way is indeed just  String fileContents   new File   path to file   text   but in this case you have no control on how the bytes in the file are interpreted as characters  AFAIK groovy tries to guess the encoding here by looking at the file content   If you want a specific character encoding you can specify a charset name with  String fileContents   new File   path to file   getText  UTF-8     See API docs on File getText String  for further reference

User · Answer

A slight variation     new File   path to file   eachLine   line - gt    println line

User · Answer

Here you can Find some other way to do the same   Read file   File file1   new File  C  Build myfolder myTestfile txt    def String yourData   file1 readLines      Read Full file   File file1   new File  C  Build myfolder myfile txt    def String yourData  file1 getText      Read file Line Bye Line   File file1   new File  C  Build myfolder myTestfile txt    for  def i 0 i lt  30 i       specify how many line need to read eg   30    log info file1 readLines   get i       Create a new file   new File  C  Temp FileName txt   createNewFile

[file] How to read a file in Groovy into a string?

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