Question

I am using java regex package to validate an email as below:

Pattern p = Pattern.compile("^[ _A-Za-z0-9-]+(\\.[ _A-Za-z0-9-]+)*@" 
                          + "[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,4})$");

This pattern works fine for accepting one email throw textbox. But, now I need a pattern that will validate multiple emails separated by commas.

Can any one tell me the pattern?

Answer 1

Something like the following:

String regex = "[ _A-Za-z0-9-]+(\\.[ _A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,4})";

Pattern p = Pattern.compile("^(?:" + regex + "\\s*,\\s* + ")*" + regex + "$");

Or, alternatively, first split the string using split("\\s*,\\s*"), then iterate over the array and validate each email address using your pattern.