How to get data from another page in jsp?

Question

Java

I have some basic data on my server

and I have a hardcore jsp that was sent to me from golden crown
<%@ page contentType="plain/text; charset=UTF-8" language="java" session="false" %>
<%
out.println("{\"RetCode\": 0, \"UserName\": \"U394_VALOTD\", \"FullName\": \"Tulaganov A.\", \"AgentID\": \"ST00445\ ", \"PwdA\": \"mCEvD72Z^3FV^K3\", \"PwdB\": \"5iK*TnkT%8y9u1P\"}");
%>
I need to create a FindClient method in jsp that will take data from my page, this is done in order not to write everything a second time.