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POPassing a variable from JSP to Java
 

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  1. POPassing a variable from JSP to Java
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    <p>I am trying to pass a string variable called <code>seq</code> from a <a href="http://en.wikipedia.org/wiki/JavaServer_Pages" rel="nofollow">JSP</a> to a Java program, and pass it on to the another Java program by passing the string as an argument to its object. I am somehow getting stuck.</p> <p><strong>Start.jsp:</strong></p> <pre><code>&lt;%@ page import="org.dypbbi.nirmiti.ProtModMain %&gt; &lt;%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"&gt; &lt;html&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"&gt; &lt;title&gt;NIRMITI&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;h1&gt;Please wait...&lt;/h1&gt; &lt;% String seq=request.getParameter("s"); ProtModMain.getSequence(seq); %&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p><strong>ProtModMain.java:</strong></p> <pre><code>package org.dypbbi.nirmiti; public class ProtModMain { String sequence=""; public static String getSequence(String str) { return str; } public static void main(String args[])throws Exception { ProtModMain MainObj = new ProtModMain(); sequence = MainObj.getSequence(); new ObjectFactory(sequence); } } </code></pre> <p>Start.jsp will retrieve the string value from the <a href="http://en.wikipedia.org/wiki/HTML" rel="nofollow">HTML</a>. It passes the string to <code>ProtModMain</code> class via the method <code>getSequence</code>. I now need to use the string value to pass it to other classes that require it, so I intend to pass it a parameter to the <code>ObjectFactory</code> object. But before that, I need to call the <code>getSequence</code> method in the <code>ProtModMain</code> class so that I can pass the value. I am not understanding how to call the <code>getSequence</code> method in the main method of <code>ProtModMain</code> class.</p>
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    1. USPeter Mortensen
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    1. COYou have a misconception of how `jsp`s work and how they **should** be used. Take a look at the wiki for both [`jsp`](http://stackoverflow.com/tags/jsp/info) and [`servlets`](http://stackoverflow.com/tags/servlets/info)
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      1. POPassing a variable from JSP to Java
      1. USSotirios Delimanolis
    2. COHow come a main method in a web application!
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      1. POPassing a variable from JSP to Java
      1. USRavi Jain
 

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