Is there a way to get the name of the form element itself using JSP? I searched google and did not find any examples which show how to get the name of the form value specified in the JSP file.
For example, I have the below form,
<html>
<form name="register" action="servregister" method="POST"
onsubmit="return validate();">
</form>
</html>
I would like to get the string "register" to a string variable in JSP. Is there a way to do this?
No, a <form> is not submitted with the request. Instead create a hidden input element which holds that information.
<input type="hidden" name="name of form" value="value" />
or possibly the submit element
<input type="submit" name="distinguishing name" value="submit" />
Either of these in a form with be sent as a url-encoded parameter.
There is probably a better solution to what you are trying to do if you explain your goals.
Consider looking into different patterns for achieving your goals.
Related
i have one view where i m showing many records and now i m adding functionality for user to download those records which he will choose date from search textbox. As my search textbox in jsp outside of form tag and thus i m not getting the value of that parameter in my servlet..is there any way to get that value from outside of form tag? Here is my jsp
<div id="divOfDateTable">
Search:<input type="text" name="dropdown" id="datedropdown">
<button id="dateButton" name="dateSearch">Search</button>
</div>
<form action="Download_Servlet" class="download" method="post">
<input type="submit" id="downloadRecords" value="Download Order-records">
</form>
In my Servlet i want to get that parameter value.i.e;Date put by user.As per the requirement only the searched records by the user needs to be downoaded. So please guys help out..
I have a JSP page which reads data from HTML and has CSS,Jquery code in it .
Now my webpage in jsp has two text labels and a add button next to them.
User can enter any no of values in the text field.
Now my requirement is that every time user enters the alue in these fields and clicks on add then that data should be passed on to my servlet. Servlet will basically do some validation and return a boolean variable.
Based on the value of this boolean, I shall change the appearance of my text boxes.
This is required to be done for every time user clicks on Add button.
How can I achieve this ?
My HTML code :
<div id="id1" name="id1" style="display: none;">Add a node: </br>
<input type="text" name="ipaddress" id="ipaddress" placeholder="Enter Node IP"> <input type="text" name="port" id="port" placeholder="Enter Node Port">
<input type="button" value="Add" name="addnodebutton" id="addnodebutton"/>
</div>
The value in ipaddress and port shall be passed on to my servlet and depending on return parameter, their appearance should change.
Can anyone enlighten me how this is actually going to work ?
TIA :)
For passing data to and from a servlet, you have options.
Option 1- You can wrap your html in a form tag and set the action/method properties for your servlet/http method like below:
<form method="POST" action="servletname">
<input type="text" name="ipaddress" id="ipaddress" placeholder="Enter Node IP">
<input type="text" name="port" id="port" placeholder="Enter Node Port">
<input type="submit" value="Add" name="addnodebutton" id="addnodebutton"/>
</form>
The submit would send a request with the input to your servlet. You would then need to handle your request parameters in your servlet, set your values/flags in your response object and forward to the user or jsp/html page of your choice.
Option 2- You can make an ajax call from your jsp, process your input and return a response to your page asynchronously. Example below:
A Simple AJAX with JSP example
I have a jQuery dialogue box which contains values as checkboxes. On selecting the checkboxes I am storing the selected values into label. Next I have to send these values from label as parameter through form to servlet but I don't know how to complete it.
Here is my code:
<form action="CallTimer" method="GET">
<label class="button2">Set Date: </label>
<input type="text" name="date" id="date" size="4">
<input type="Submit" name="Submit" value="Submit" id="Submit">
<br/>
Select Reporting Level
<label class="button2" style="display:none" id="depart"> Department</label>
</form>
I am retrieving these parameters in my Servlet as:
String reportname=request.getParameter("depart");
System.out.println(reportname);
But it is returning null values. Please help me.
Thanks in advance.
You have to use hidden input field:
<input type="hidden" name="depart" />
You need to understand what gets passed on form submission and what is not. In a nutshell, only values of the input fields get sent to the server. You have several ways to solve your problem:
Write value to a hidden input field
Modify the query string (what gets sent after ? in your GET request) during form submission (using java script):
?...&depart=xxx
I'm looking to create a hotel booking form that automatically generates a URL based on the information inputted into the form.
For example, if a person inputs the name of "John" and the date "12/23/1989" I need the form to generate a URL such as "fakeurl.com/n=JOHNd=12231989" and automatically direct to this link when the form is submitted.
Using a few tutorials (I don't know Java very well), I was able to piece this together:
http://codepen.io/JeremyMG/pen/ptaGE
However, I am unsure how to make the fields match up with the variables.
If anyone could give me a hand or post a working example, that would be great! Thanks guys.
<form method="GET" action="https://fakeurl.com">
<input type="text" name="n" value="john" />
<input type="date" name="d" value="12/23/1989" />
<input type="submit" value="submit" />
</form>
Set the FORM tag's METHOD attribute to GET
I'm developing a Java/Spring web application. The problem I'm currently facing is that I'd like to have message from message.resources shown as an attribute in an HTML.
<input type="submit" name="login" value="login" />
So instead of the hardcoded value "login" I need to the value of
<spring:message code="general.submit" /> as the value attribute of that input tag. As the pages are all xml, it's no option to nest tags like
<input type="submit" name="login" value="<spring:message code="general.submit" />" />
as it does not compile. I could, of course, read the value in the Java controller and use a JSTL variable to display the value, but I think it would be too hackish and complicated, especially for pages with large amount of submit buttons. Is there some kind of elegant way of accomplishing what I want to do?
Use <spring:message> to store the value in a var, then reference that var using EL, e.g.
<spring:message code="general.submit" var="submitText"/>
<input type="submit" name="login" value="${submitText}" />