An example of the problem of JSP page transfer between pages _jsp programming

In this paper, we analyze the problem of passing values between JSP pages. Share to everyone for your reference, specific as follows:

One of the simplest to count the number <a> tags inside the href to pass the value,

Write in a.jsp:

<a href= "b.jsp?name1= value" ></a>

Then receive in b.jsp:

<%
   String name2 = new String (Request.getparameter ("name1"). GetBytes ("Iso-8859-1"), "GBK");
   Request.setattribute ("Name3", name2);
%>
<input id= "id1" value= "${name3}"/>

This method is relatively simple, but I also found some problems, such as not dynamic loading, he is loaded in the page when the value is appended to it, for example,

I have a <select> tag, which is a dynamic cascade of some provinces and cities, then I want to take the value of <select> inside, can not be used to preach with href, because I choose <select> the value is in the page after the completion of the load , the individual is doing this,

<script>
  var href = "b.jsp?sd=";
  var Getv = function () {
    var add = $ ("#ad"). Val ();
    href = href + add;
  }
  var H1 = function () {
  window.location = href;
}
</script>
<select id= "ad" Onchange= "Getv ()" ></select>
<a id= "H" href= "#" onclick= "HL ()" ></a>

I hope this article will help you with JSP program design.