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Java Forum / General / June 2006Run a Servlet Without a Submit Button
I am new to Java and am trying to figure out how to run a servlet without the need for a user to click a submit button. I have a web service that converts a file to PDF and then a servlet that displays the PDF file in the browser. Here is the code I have in the JSP: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <HTML> <HEAD> <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <META name="GENERATOR" content="IBM Software Development Platform"> <META http-equiv="Content-Style-Type" content="text/css"> <LINK href="theme/Master.css" rel="stylesheet" type="text/css"> <TITLE>IgRetConvTest.jsp</TITLE> </HEAD> <BODY> <H1>Retrieve and Convert</H1> <jsp:useBean id="proxy" class="getconvert.IgRetConvProxy"></jsp:useBean> <% session.setAttribute("filename", String.valueOf(proxy.retrieveConvert("<?xml version='1.0' encoding='UTF-8' ?><IMG-PATH>C:\\\\TEST\\</IMG-PATH><IMG-NAM>TEST.IMG</IMG-NAM>"))); %> <FORM action="/IgRetConvClient/PDFDisplay" method="post"> <INPUT type="submit" name="Submit" value="Display Image"> </FORM> </BODY> </HTML> How can I run "/IgRetConvClient/PDFDisplay" without using "submit"? >I am new to Java and am trying to figure out how to run a servlet > without the need for a user to click a submit button. I have a web > service that converts a file to PDF and then a servlet that displays > the PDF file in the browser. Here is the code I have in the JSP: [most of the code snipped] > <FORM action="/IgRetConvClient/PDFDisplay" method="post"> > <INPUT type="submit" name="Submit" value="Display Image"> > </FORM> [...] > How can I run "/IgRetConvClient/PDFDisplay" without using "submit"? The user has to somehow navigate to that URL. There are many ways to this that don't involve clicking on a button labelled "Submit". One of them is to type in the URL directly into the browser's address bar, for example. - Oliver > >I am new to Java and am trying to figure out how to run a servlet > > without the need for a user to click a submit button. I have a web [quoted text clipped - 14 lines] > > - Oliver All of the code I supplied is in a JSP. If the user navigates to the JSP I need a way to run the servlet without them clicking "submit". Can you give me some specific examples of how to do that? >> >I am new to Java and am trying to figure out how to run a servlet >> > without the need for a user to click a submit button. I have a web [quoted text clipped - 18 lines] > JSP I need a way to run the servlet without them clicking "submit". > Can you give me some specific examples of how to do that? Doesn't the user navigating directly to http://[yourserver]/IgRetConvClient/PDFDisplay cause the servlet to run? - Oliver > >> >I am new to Java and am trying to figure out how to run a servlet > >> > without the need for a user to click a submit button. I have a web [quoted text clipped - 23 lines] > > - Oliver That's not the way it's structured or the way we need it to work. > >> >I am new to Java and am trying to figure out how to run a servlet > >> > without the need for a user to click a submit button. I have a web [quoted text clipped - 23 lines] > > - Oliver I'm sorry -- I think I know what you mean. Are you suggesting I use a redirect??? >> >> >I am new to Java and am trying to figure out how to run a servlet >> >> > without the need for a user to click a submit button. I have a web [quoted text clipped - 27 lines] > I'm sorry -- I think I know what you mean. Are you suggesting I use a > redirect??? Well, I wanted to get a yes-or-no answer to my question to check if my assumptions were correct. Assuming they ARE correct, what I'm basically saying is that there is virtually an infinite number of ways to get the servelet to run, depending on what you want. All that needs to be done is to ensure that the client eventually navigates to that link. So you could use a form, or an <a href="/path/to/your/servlet"> link, or a redirect, or javascript, or an applet, or a ShockWave flash animation, or a Windows .url shortcut, etc. - Oliver Google sometimes does it by having an <img> tag href to a servlet that returns something unimportant to the browser. the <img> tag can have a size 0 so it does not interrupt the page. > > >I am new to Java and am trying to figure out how to run a servlet > > > without the need for a user to click a submit button. I have a web [quoted text clipped - 18 lines] > JSP I need a way to run the servlet without them clicking "submit". > Can you give me some specific examples of how to do that? Well if I understand you correctly, just make the following change to your jsp : <BODY onLoad="document.forms[0].submit();"> that will cause the form to auto-submit when your jsp is called. No need for the user to hit a submit button. (btw. this is more a javascript question) /Steen > > > >I am new to Java and am trying to figure out how to run a servlet > > > > without the need for a user to click a submit button. I have a web [quoted text clipped - 29 lines] > > /Steen <BODY onLoad="document.forms[0].submit();"> works like a charm!!! Thanks so much (and sorry for posting in the wrong group)! Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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