How to write a JAVA template creator?

Question

Java

We in the company write a program in JAVA, a program for the administration of hospitals and clinics
. It has templates, for example TextInput - patient name, passport number, various Suggests like there, select patients from the list, their diagnoses, procedures that would be prescribed to them, and so on.
BUT HERE IS THE PROBLEM:
Now I do all this manually, that is, I take Apache Pivot, write a bxml file, write out each field as HTML, then work with the input and output data, saving them in the xml field, say.
WHAT I WANT:
Write an editor that would have a list for example 1. Patient's first name last name 2. Patient's address 3. Patient's diagnosis 4. Doctor's name, etc. There are actually a bunch of these. So after I select, for example, the name of the patient, I simply drag the TextInput onto some, say, drawing panel and it remains there.
How to do it so that it is modern and dynamic, moreover?