Value transfer between pages, js jsp html

Passing values ​​between pages ===============

Use the built-in object request to a page
<%request.setAttribute("txt", "Life service") %>
The second page
<% String txt = request.getAttribute("txt") %> (attribute)
<th><%=txt %></th>

can also pass the "life service" of a page as a parameter (?txt=life service) to The second page, use <%request.getParameter("txt") %> to get it (parameters)

This is equivalent to the value stack, or you can directly use <input type="hidden" name="roleid" id="roleid" value="${id}">

var roleId=$("#roleid").val();//This implements jsp--js//Hidden domain


<%> accepts background transfers to htm hidden domain
js submit background, get htm
htm expression get <%>, call js
js, <%> communicate through hidden domain