Pass dynamic parameters in the keyvalue (message key) to package.properties - struts2

Question

I have tried to pass dynamic parameters to keyvalue(message to display) which I will get from package.properties to the Action class through the getText() method. To get the message, we can use getText(String keyvalue) method. What should I do to pass some parameters and retrieve the parameters with the message through the getText() method?
I saw some API's to pass dynamic parameters. But I don't know how to use, these are the following API's, click here to see the Struts 2 API Documentation.
getText(String aTextName, List<Object> args)
getText(String key, String[] args)
getText(String key, String defaultValue, String[] args)
Thanks in advance..

Answer 1

I suppose that you have following properties in your package.properties
username.required=user name is required
password.required=password is required
you can use getText() as
getText("username.required")
getText("password.required")
Now if we want to use getText(String key, String[] args) we have to pass following parameters
aTextName - the resource bundle key that is to be searched for
args - a list args to be used in a MessageFormat message
That means the message format pattern and other static strings will, of course, be obtained from resource bundles. Other parameters will be dynamically determined at runtime.
example
we have following entry in resource file
disk.data=The disk \"{0}\" artist name is {1}.
in this {1} and {0} are the dynamic parameters and will be determined at run time so args will contain the value of these parameters.
String artistName= demo;
String diskName = "Artist";
String[] testArgs = {artistName, diskName};
So final call will be getText(disk.data, testArgs);
and it will show
The disk demo artist name is Artist.
Please go through MessageFormat to know how this work