如何在JSP页面中添加请求参数？

Question

I have to add to GET method two dates selected by users.
How can I do this, with the opportunity to extract it at servlet later?

Code snippet from jsp page:

<p class="text-left">
  <strong><fmt:message key="apartments.arrival"/>:</strong> <input type="text" id="arrivaldate" name="arrivaldate"/> <br/>
  <strong><fmt:message key="apartments.depart"/>:</strong> <input type="text" id="departdate" name="departdate"/> <br/>
  <strong><fmt:message key="apartments.price"/>:</strong> ${apartment.price} <br/>
</p>
<a class="btn btn-primary btn-large btn-block"
                       href="<c:url value="/purchase?apartment=${apartment.id}"/>"><fmt:message key="button.book"/>
</a>

I have to take arrivaldate + departdate .

The date is chosen with the JQuery date picker.

I want to do the following:

• take two data values inputted by the user at JSP page
• set as a parameter to URL
• at servlet side into doGet() extract these two values. Better to avoid using the form, I want to put this request into doGet() .

UPDATE:

Here is the content of a full page - apartments.jsp

How to solve this?

Answer 1

Probably what you want is to overwrite the method doGet of your Servlet (if you have not done that already) and retrieve the GET parameters as

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    Stirng arrivaldate = request.getParameter("arrivaldate");
    Stirng departdate = request.getParameter("departdate");
    Stirng id = request.getParameter("apartment");
}

UPDATE: Looking at your apartments.jsp , I figured out the problem. You are not using any form tag and your button button.book has the GET parameters hardcoded. That is why parameters other than apartment are not submitted.

To fix it, you are going to have to wrap the content of lines 74 to 81 with a form tag, like this:

<form action="/purchase" method="GET">
    <p class="text-left">
        <strong><fmt:message key="apartments.arrival"/>:</strong>
        <input type="text" id="arrivaldate" name="arrivaldate"/> <br/>
        <strong><fmt:message key="apartments.depart"/>:</strong>
        <input type="text" id="departdate" name="departdate"/> <br/>
        <strong><fmt:message key="apartments.price"/>:</strong> ${apartment.price} <br/>
    </p>
    <input type="hidden" id="apartment" name="apartment" value="${apartment.id}"/>
    <input class="btn btn-primary btn-large btn-block" type="submit" value="Submit" />
</form>

Answer 2

I think maybe your example is from a JavaScript page?

If you had the following url:

blah.com/home?name=blah

You can use various languages(PHP, JavaScript, Java) to then do a getParam("name") which would return blah .

You can also look into a rest service where you can do URL params using the following URL.

blah.com/home/blah

where you have the java code something like this

@GET
@Path("/home/{name}")
@Produces("text/html")
public String Test(@URLParam String name) {
   return name;
}

Answered in Java cause question has java tag.

Answer 3

just try this method to get your arrivaldate + departdate.

$("#from_date").datepicker({
    minDate   : 0,
    onSelect: function() {
        var minDate = $(this).datepicker('getDate');
        minDate.setDate(minDate.getDate());
        $("#to_date").datepicker( "option", "minDate", minDate);
    }
});

$("#to_date").datepicker({
    minDate: 0
});

fiddle demo to click here.