Servlets :: Loosing HTML Data Into Request Parameter?
Jan 23, 2014
In one jsp page, I submit a form with a message body with following html code (which is store in "MsgBody" in my request)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
[code]....
But when I submit my form, I received in my servlet a parameter "MsgBody" without several tag like <html>/<body> ... do you know this behavior, by default tag are delete ?
public String execute(Map params, HttpServletRequest request, HttpServletResponse response) throws Exception {
String MsgBody = request.getParameter("MsgBody");.
I use Tomcat 7, maybe a tomcat behavior can influence for this tag loose in request param ?
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Dec 24, 2014
I would like getting a specific parameter name from the set of request parameters. In particular the name of the 4th parameter in the request parameter set.
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May 12, 2014
I have a very simple HTML form with a textField for a name, and add button to add the name to a MySQL database, and a sort button to sort the names in the database and display them. I almost have it working, however when I hit the "sort" button; I get the message that appears after a user clicks the add button along with the sorted list of names. It looks like this:
Please go back and add a name or sort.
Bill Jones
David G
Debbie Downer
Jane Doe
Joe Smith
John Doe
Mike Jones
Paul Smith
Susan Jones
What I have to change on my code to make just the list show up by itself when the user clicks sort?
My servlet code:
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.*;
[Code] .....
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Sep 4, 2014
Is it possible to get the list/ values in html/jsp from servlet?
I have a table inside an html/jsp page and when the user clicks a button I need to refresh the whole page with some additional text message.
Currently what I am doing is that I am using a java bean for the jsp page that contains a list of values inside the table then store it in session but I think there is a better way without storing it in session.
I tried using request.getParameter() but it only returns string.
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Nov 17, 2014
I have a HTML table whose rows are getting generated through javascript function. I want to save this data in the table rows.
**HTML Code**
<div style="width:100%;height:100%;border:1px solid black; overflow-x:scroll; overflow-y:scroll; padding:0">
<table border=0>
<tr>
<td>
<input type="button" name="add_details" id="add_details" value="Add" onclick="AddDetails()">
<input type="button" name="delete_details" id="delete_details" value="Delete" onclick="DeleteDetails()">
[Code] .....
When i press submit button in my form of JSP, how can i access table data?
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Aug 15, 2014
I need to get the html in string when i hit the hit the jsp in servlets basically i need to put the output of jsp in pdf file when i hit one link i need to download that data in pdf file. I am using itextpdf.
Sample code
pResponse.setContentType("application/pdf");
((HttpServletResponse) pResponse).setHeader("Content-Disposition", "attachment; filename=report.pdf");
//Get the output stream for writing PDF object
OutputStream outStream=pResponse.getOutputStream();
ByteArrayOutputStream baosPDF = new ByteArrayOutputStream();
[Code] ....
I need to convert the sample download.jsp to html so that i can parse
// XMLWorkerHelper.getInstance().parseXHtml(docWriter, document,new FileInputStream(jspPath),new FileInputStream(csspath) ,null ,new XMLWorkerFontProvider());
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Apr 1, 2015
I want to retrieve the data from this table given below and insert that data in the database in the next servlet
package com.sk;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
[Code] .....
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Jan 8, 2015
I want to understand how is it possible to send data (image + text) along a single form. Here is my code:
<form method="post" action="updateAccount"
encType="multipart/form-data">
<input type="file" name="file" value="Select image ..." /> <input
type="submit" value="Start Upload" /> <br>
<textarea rows="8" cols="54" name="about">Yes
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Feb 25, 2014
I have the following questions:
1. Does a GET HTTP request contain a request body? If yes what is contained in it? Are the request headers also part of the request body?
2. Is it possible to send a byte array as part of the GET request in its body?
3. Is there a size limitation on the data that can be sent via a GET request?
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Apr 3, 2015
I want to run a function on load only when a particular parameter is not present?
My question is how to detect in JSP that if a particular parameter is present or not?
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Nov 4, 2014
in this website URL....it sent request to html instead ? how could it work? i thought you could only send format to jsp, asp, php, or etc..could html page also process form request?
<FORM class=cl action=/de/toolbar/suchergebnisse.html><INPUT name=_charset_ type=hidden value=UTF-8>
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Apr 29, 2014
When we forward the request to a jsp , I noticed that the url bar address does not change .
I made a form form.html , and set action to a servlet then in servlet class I set an attribute and forward the request to jsp ,which prints the value of that attribute.But the url in address does not actually points to that jsp to which i forwarded the request.
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Jun 14, 2014
I have to forward my request to another webApplication using post request parameters. In this case Webaplication-1 need send request using post request params to Webapplication-2 & once Webaaplication-2 receives request it has to process & display output.
For this have tried below 2 options which Servlet API provides.
1. RequestDispatcher : this will used to forward request to another resource within the application.
2. sendRedirect() : this method support doGet() of Servlet.
3. Using HttpClient, which is provided by Apache able to do but it will not displaying Output,It sending back response to Webapplication-1 .
Is there any option which will handover request from one webapplication to another webapplication.
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Sep 26, 2014
I want to create a new instance of a Java model class for each new request coming to a servlet.
How to do that without doing that in doGet() or doPost().
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Apr 8, 2014
We have a big application which is implemented in basic servlet. WE have Get and Post request in servlet. I want to provide them security if any malicious attack will happen on the form submit method. I want to make it secure. In detail, suppose if any user want to submit form/ any ajax request from my application and if he/she changes the method of submission from POST to GET then how I will recognize this?
I know that HTTPServletRequest object have GetMethod() but how I will detect that it is not changed by Tamper data/Fidler/Watir. One more way, I googled is by using GetQueryString() method but lot of the places I have query paramater in my POST request.
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May 30, 2014
I have to send a request with post parameters from one web application to another web application,both are running different servers.
In my application i don't have any JSP,html only controller part which will handle request extract request parameters & based on request params i'll do a web service call.
My current requirement is based on request parameters i'll send request to another web application with received parameters.
I tried with sendRedirect() ,but it support only get() method.
how to proceed further.
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Jun 24, 2014
I am building an application that has two types of users. While some of the fields (ie: username, email address, password) are the same for both user types, other fields are different for each user type.
Therefore, I would like to split up the process of registering (ie: writing the user info to database) into two parts:
1) registering the common fields among both user types (servlet 1)
2) registering the specific fields based on the user type that is registering (servlet 2a and servlet 2b).
Therefore, once servlet 1 is processed, I wish to forward the request to servlet 2a or 2b depending on what type of user is registering.
I wish to do this since I will have other parts of my application that will make use of servlets 2a and 2b as well. Is this possible to do (redirect request parameters from jsp to servlet and then to another servlet)?
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Mar 26, 2014
After confirmation to the login details I added new cookie having logging information and then dispatched this request to controller servlet where this cookie is checked if it is present then user is forwarded to a particular page. Otherwise is redirected to the sign in page. Now the problem is when we add cookies then it is added into "response" object and when we get cookies we get them from "request" object. So for the first time redirection to controller servlet "response" object would not have this cookie as it is not available in "request" object. But will be available for later requests.
My question is what is the way to get this cookie in the first request. Or is there any way to send refresh like response to the browser so that this cookie is added??
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Jul 13, 2014
i was i a program for Execute JSP Page.Inside Tomcat Conf Server File i add following path:
<Context path = "JSPTEST"
docBase="D:Tomcat 8.0webappsJSPTEST">
</Context>
</Host>
</Engine>
</Service>
</Server>
and this is my Jsp page program:
<html>
<head>
<title>Hello World Example in Jsp</title>
</head>
<body>
<h1>
[code]....
but same error is repeting:The request resourse is not available.
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Jan 29, 2015
We are starting to deploy virtual desktops in our factory.I have a file upload form that works on conventional desktops but fails on the virtual machines. Notice the lifecycle parameter is not being passed to servlet on these virtual machines but does get passed when ran from standard desktop machine.
This is my form code
<form action="/QMSWebApp/AttachmentListController?lifecycle=attachafileuploadfile" enctype="multipart/form-data">
<div class="hide">
<input type="text" name="docindexno" size="20" value="${attachmentObj.fileindex1}">
<input type="text" name="doctype" size="20" value="${attachmentObj.filetype}">
<input type="text" id="fileuploadformsource" name="fileuploadformsource" size="20" value="${attachmentObj.fileUploadFormSource}">
</div>
<input type="file" id="fileName" name="fileName" size="40" onchange="testFileName()">
<input type="submit" value="Upload File">
</form>
<div id="uploadresult"></div>
this is the servlet error:
AttachmentListController: userName: STEVE DYKE File Attachment Source: SI
AttachmentListController: userName: STEVE DYKE e: java.lang.NullPointerException
AttachmentListController: Parameter List: doctype
AttachmentListController: Parameter List: docindexno
AttachmentListController: Parameter List: fileName
AttachmentListController: Parameter List: fileuploadformsource
AttachmentListController: Parameter Name: doctype
[code]....
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May 24, 2014
I have used jsp's to passing request to the servlet or controllers. but we can also pass request from javascript using ajax and sending data using json.
what is the good approach and why? or does it depends on the situations? is yes, what kind of situations?
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Jun 26, 2014
My problem is my teacher told me that i have to add a radiobutton on html. According to radiobutton servlet has to choose write parameters on DB or File. And he wants me to add a method to do this work.
1)Get Parameters
2)Choose to write DB or File according to parameters
3)if it is DB create connection and do writing process
4)if it is file create file and do writing process.
Second piece of code should be removed. İnstead of this i have to use a single method. But i don't know how to do this(not writing code). Should i use another servlet or a class...
package GB;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
[Code] ....
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Nov 27, 2014
Is there anything in the HTML specification about whether submitted GET or POST parameters must retain their order? E.g. In the following is there anything in the spec that says the following data should be returned in the order they appear in the HTML code. And, most importantly, is there anything that says the firstName and surname fields should actually match up with each other, i.e. the order can change but in the same way for each field?
<form>
<table>
<tr><td><input type="text" name="firstName"/></td><td><input type="text" name="surname"/></td></tr>
<tr><td><input type="text" name="firstName"/></td><td><input type="text" name="surname"/></td></tr>
<tr><td><input type="text" name="firstName"/></td><td><input type="text" name="surname"/></td></tr>
<tr><td><input type="text" name="firstName"/></td><td><input type="text" name="surname"/></td></tr>
<tr><td><input type="text" name="firstName"/></td><td><input type="text" name="surname"/></td></tr>
<tr><td><input type="text" name="firstName"/></td><td><input type="text" name="surname"/></td></tr>
<table>
</form>
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Jan 7, 2015
my Servlet as I would like my Servlet to run first and to create a session var then forward the value to the JSP (the GUI ) and have the JSP able to send a var back to the Servlet for reprocessing and update the session var to again be sent to the JSP and so on . - The Servlet contains logic to handle incorrect input types and directly out puts a HTML error page..
Below I will add the code I have so far and a link to the question in my Text Book.
My code:
JSP Page:
bank.JSP :
<%
//Starts outputting the HTML Form
%>
<html>
<head>
[Code].....
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Oct 1, 2014
I want to create a new instance of a Java model class for each new request coming to a servlet.
How to do that without doing that in doGet() or doPost().
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Oct 11, 2014
How is this possible? Here is the servlet page.
/**
* Servlet implementation class InvoicingDeptServlet
*/
@WebServlet("/InvoicingDeptServlet")
public class InvoicingDeptServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
//Make arraylist global object
ArrayList<InvoiceData> invoiceList = new ArrayList<InvoiceData>();
[Code] ....
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