How To Pass Error Message From Servlet To Jsp
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How To Show Error Message In Jsp
Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community servlet redirect to same page with error message of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to send error message from servlet to jsp page? up vote 1 down vote favorite how to display alert message in servlet My jsp page consists of a form that takes in an email address. I then use java to check if my postgresql database already contains that email address. Right now my servlet just redirects the user back to the Registration page if the email address already exists. What I am trying to do is write an error message on the form "The email address you entered already exists" with java. I haven't
How To Send Alert Message From Servlet To Jsp
figured out how to do it. Is there some way I could do this with jQuery form validation? I am using that right now for required fields. java postgresql servlets error-handling jquery-form-validator share|improve this question edited Aug 1 '15 at 5:38 John 1,83211540 asked Aug 1 '15 at 1:47 Dylan 8210 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote accepted Here you need to pass information from servlet to JSP. To Pass parameter from servlet to JSP or vice versa. Use Session to pass value from one page to another (here). In Servlet request.getSession().setAttribute("email", "exist/notexist"); In JSP Make a blank div just beside the email textbox and set its content based on the value of String s1 which is set from session.getAttribute("key") method. <%! String s1 = ""; %> <% s1 = (String) session.getAttribute("email");%> <% if(s1.equals("exist")){ %>
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow how to display message in jsp page Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow how to display error message in jsp using javascript is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Servlet redirect to same
How To Show Alert Message In Jsp
page with error message up vote 11 down vote favorite 11 I have a question about servlet redirection to the same initial page. The following is the scenario: Suppose a user want to buy an item, so he fills in the amount and http://stackoverflow.com/questions/31757418/how-to-send-error-message-from-servlet-to-jsp-page submits it. The form is submitted to a servlet and the quantity available is checked against the available in the database. So if the amount of items ordered is more than the available the servlet redirects to the same page but with a message like "item is unavailable". So my question is how to implement this case. How to redirect to the same initial page with an error message. I don't want to use ajax here. Here is how I have thought of it as : 1.)should http://stackoverflow.com/questions/14632252/servlet-redirect-to-same-page-with-error-message I set a context attribute if error is generated and then check it again in initial page after re-direction and show the message that has been set. What are the best practices for this kind of events? java jsp servlets redirect scope share|improve this question edited Jun 9 '14 at 17:37 informatik01 9,29763759 asked Jan 31 '13 at 18:04 Vishal Anand 2412819 Put your mouse on top of [servlets] tag which you placed on the question until a black box shows up and then click therein the info link. This issue is covered for long by the first Hello World example. –BalusC Feb 1 '13 at 14:01 add a comment| 1 Answer 1 active oldest votes up vote 31 down vote accepted The most common and recommended scenario (for the server side validation in Java serlvets/JSP world) is setting some error message as a request attribute (in the request scope) and then outputting this message in a JSP using Expression Language (see the example below). When the error message is not set - nothing will be shown. But when storing an error message in a request, you should forward a request to the initial page. Setting a request attribute is not suitable when redirecting, because if you use a redirect it will be a totally NEW request and request attributes are reset between requests. If you want to redirect a request to the referring page (the one from which you submitted data) then you can store an error message in a session (in the session
This Site Careers Other all forums Forum: Servlets How to pass messages from login servlet to jsp Andre Solberg Greenhorn https://coderanch.com/t/510487/Servlets/java/pass-messages-login-servlet-jsp Posts: 13 posted 6 years ago Hi, When login fails in the servlet, I want to pass an error message to the page. I thought it http://www.java-forums.org/java-servlet/30348-send-error-message-servlet-jsp.html would be as simple as just adding an attribute to the request, and then redirect back to index.jsp. But since the browser makes a new request, how to the attribute is lost. If I use the forward method, I get the error message just as I want, but the problem is that my login jsp, along with some other pages, are included in index.jsp. When I forward, the index.jsp doesn't behave normally, so I have to figure out another way. Any message in jsp tips? Thanks! Mos Jeff Greenhorn Posts: 14 posted 6 years ago You can use AJAX. Generate an HTTP object that is sent to the servlet, the servlet can then respond by returning a response xml object. ie. StringBuffer buffy = new StringBuffer(); response.setContentType("text/xml"); response.addHeader("Cache-Control", "no-store, no-cache, must-revalidate"); response.addHeader("Cache-Control", "post-check=0, pre-check=0"); response.addHeader("Pragma", "no-cache"); buffy.append("\n"); buffy.append("
5 of 5 Thread: Send error message from servlet to jsp LinkBack LinkBack URL About LinkBacks Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Search Thread Advanced Search Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 07-01-2010,10:05 PM #1 karq Member Join Date May 2010 Posts 63 Rep Power 0 Send error message from servlet to jsp Hey, I'm quite new to Java EE and servlets so how do I send a error message to a jsp page? scenario: Some one insert his/her's username or password wrong, by displaying the error message on the validation servlet I would like to send a message back to the jsp login page and display the message there. I would be very greatful if someone would help me :) 07-02-2010,09:15 AM #2 Tolls Moderator Join Date Apr 2009 Posts 12,947 Rep Power 22 On a failed login you generally forward back to the login.jsp, but add some form of error message/object/whatever attribute to the request. The login.jsp will have a bit of code somewhere that checks if this attribute exists on the request, if so it then displays it. 07-02-2010,09:30 AM #3 karq Member Join Date May 2010 Posts 63 Rep Power 0 Yes, I know that, but how to I do it? In php I redirected back to the login page with a uri segment and on the login page I checked if that segment exists, if so then gave a error message. 07-02-2010,10:03 AM #4 Tolls Moderator Join Date Apr 2009 Posts 12,947 Rep Power 22 I just said how you do it. Add an attribute to the request (the HttpRequest object), then forward (not redirect) back to the login page. Presumably you already forward to a success page on success...so just do that, but to the login. If you don't know how to forward, or how to add attributes to the request, or how to work with attributes in a JSP page then you'll need to read up on that. 07-02-2010,10:07 AM #5 kar