I have a fairly simple question, but I'm unable to find a working answer.
I'm using javascript in my HTML file for a page that is taking input from the page and giving me back a string of a jSON object. All that I want to do is take this string and put it in a Java string.
I can do things like
target.appendJavaScript("s=getString();");
target.appendJavaScript("alert(s);")
which give me the desired information in the alert. But how do I get s into a Java string?
I have tried the following
StringValue temp = RequestCycle.get().getRequest().getQueryParameters().getParameterValue("s");
info(temp.toString());
And other variations like getRequestParameters(), but I get nulls on temp.
These actions are inside an AjaxFallbackButton's onSubmit.
Any advice on how to get a javascript var in Java?
Although I would still like to know more about sharing variables between Java and Javascript in HTML, my case was solved thanks to Wicket.
The value that I was retrieving with s=getString() was already accessible in a HiddenField, and so I simply needed to get it a wicket:id in the HTML and add it with a property model in the Java. Hopefully this might help someone else in the future.
Related
Let me just start by saying that this is a soft question.
I am rather new to application development, and thus why I'm asking a question without presenting you with any actual code. I know the basics of Java coding, and I was wondering if anyone could enlighten me on the following topic:
Say I have an external website, Craigslist, or some other site that allows me to search through products/services/results manually by typing a query into a searchbox somewhere on the page. The trouble is, that there is no API for this site for me to use.
However I do know that http://sfbay.craigslist.org/search/sss?query=QUERYHERE&sort=rel points me to a list of results, where QUERYHERE is replaced by what I'm looking for.
What I'm wondering here is: is it possible to store these results in an Array (or List or some form of Collection) in Java?
Is there perhaps some library or external tool that can allow me to specify a query to search for, have it paste it in to a search-link, perform the search, and fill an Array with the results?
Or is what I am describing impossible without an API?
This depends, if the query website accepts returning the result as XML or JSON (usually with a .xml or .json at the end of url) you can parse it easily with DOM for XML on Java or download and use the JSONLibrary to parse a JSON.
Otherwise you will receive a HTML that is the page that a user would see in a browser, then you can try parse it as a XML but you will have a lot of work to map all fields in the HTML to get the list as you want.
I have a question about retrieving data from a client who is using java and i am using vb.net.
I am expecting a form posted to me and read the data.
My issues is when i do Request.Form("DATA") i get nothing from the client.
Now if i create a html form and post it to my url with the field "DATA" i can read everything fine. I can also loop through my form and see the field and the button if i right them out to the screen or to a text file. Code is below
response.write(Request.Form("DATA"))
OR
Dim entryName As String
For Each entryName In Request.Form
response.write("Entity Name: " & entryName)
Next
Either method above works fine for me but not for the client. When the client hits my page i see nothing at all no buttons no fields, nothing.
I am concerned he is not posting properly to me. I spoke with the developer and he said he would retrieve the data on his end by doing something like "Request.getparameter"
I do not know java at all but from what i read it sounds like "Request.getparameter" will grab any field out of a form or querysting that has the name specified aka my "DATA" field that i am looking for.
Can anyone explain to me what request.getparameter means in java and what the equivalent code would be in vb.net?
Again i do not know java at all and have searched on this for a while but cant quite find a definitive answer.
Thanks in advance.
It is correct that in Java, request.getParameter("DATA") will look in both the query string and posted form data, while in .NET, Request.Form("DATA") only looks at posted form data. Therefore, it seems likely that your client is sending the data in the query string, since you are not seeing it.
You have a few options. You could use Request.QueryString("DATA") to check only the query string, or either Request.Item("DATA") / Request("DATA") or Request.Params("DATA") to check both the query string and posted form data, plus cookies and server variables. I think Items and Params may be a little different in what they return, e.g. for multiple values. They are probably the closest equivalent to the Java request.getParameter function.
Is it possible to edit browser's text field using java? Currently I'm using Jsoup to gather some information about websites so I'm looking for some more options.Could JSoup to this? Thank you!
I don't see how JSoup would help here. JSoup is just a way to parse html. You could use it to write out some html that has a text field in it with an input tag that has a value attribute on it. Then when you render the file in a browser, the page would have that value. But since you haven't given us very much information, I'm not sure if this is exactly what you want to do or completely different from what you want to do.
This is probably the last thing you'd want to do (not the first), but you could set the values of a text field using Java's Robot class.
I have a array of data which was generated due to some Actions in my previous actions
On submitting that page, Control will be redirecting to the second page,
IN the second page, I need to populate the array data into the Tables
( I want to use Javascript to populate this, No other means)
Problems which i am facing now
1) I cant read the Java array in the Java script ? (I am not sure how to pass the Java array to Javascript function)
2) Thought of implementing the Java script objects similar to the java objects, but there will be lot of over head
Can any one help me to over come this situation
I am using the BTT framework which is similar to Struts, for Javascript I am not using any frameworks
Thanks in advance
JSON would be a format to make the java-array accessible in javascript.
https://github.com/douglascrockford/JSON-java/blob/master/JSONStringer.java
too broad to answer, since specifics are missing. here are some generic steps.
Collect your stuff in JavaScript array
Have a hidden form field
while posting to server, set the value of hidden field to your array (in string format)
Read the hidden field content in server (posted form data)
Parse them (JSON is appropriate here)
Use them while preparing next page content as JS Array
So i'm trying to capture a certian section of a getQueryString(). I know I could try and go through and parse the string to get the certain section I wanted but was hoping to just be able to grab the piece I need.
Here is my query result:
N=0&Ntk=General&Ntt=info&Nty=1&D=info&Ntx=mode+matchallpartial&Dx=mode+matchall
I'm looking just to capture this part: Ntt=info
The =info part will change to whatever the search requested was.
I have gone through a lot of the API request function and haven't found anything that works for me.
Am I just going to have to parse it?
Use ServletRequest.getParameter
req.getParameter('Ntt');
It will return null if the parameter isn't set.