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.
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<=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();
A slight variation...
new File('/path/to/file').eachLine { line ->
println line
}
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.
the easiest way would be
which means you could just do:
new File(filename).text
Source: Stackoverflow.com