So, you need an in-memory image of your web page, for that HTMLParser
provides a NodeList.
Get the file, or text string and pass it to the parser and use a null filter
to get everything:
Parser parser = new Parser ();
parser.setResource (...);
NodeList list = parser.Parse (null);
Then you need to find your input fields:
NodeFilter filter = new NodeClassFilter (InputTag.class);
NodeList inputs = list.extractAllNodesThatMatch (filter, true /* recursive
*/);
Now cycle through your list looking at the attributes of the input tags:
for (int i = 0; i < inputs.Length (); i++)
{
InputTag tag = inputs[i];
... tag.getAttribute (String name)
... tag.setAttribute (String key, String value)
}
Then output the whole page:
System.out.println (list.toHtml ());
On Wed, Sep 30, 2009 at 7:39 PM, Ray Jaramillo <ra...@mc...> wrote:
> I am working on a project and am having a bit of trouble figuring out how
> to do what I want with the HTML parser.
> Basically what I want to do is parse a HTML file and find all the text
> boxes. I then want to read the ID attribute of each box and load a value
> into the value attribute and reload the html file.
>
> I am working on a program (Program A) that currently communicates with a
> micro controller. Program A communicates over RS 485 or ethernet. The
> communication part is complete and working. I make requests to the micro for
> information and also send updates to it. Program A currently displays
> information it receives from the micro in a tabular format. I created the
> GUI in Swing to display the information and allow the user to make changes
> to the system.
>
> What I am currently trying to accomplish is this. We would like to display
> the information in a web page with a graphic representation of the HVAC
> system being monitored. The client will produce an HTML page with said
> graphic representation and text boxes that are to be updated with particular
> sensor, setpoint and relay values of the clients choice.The current values
> are to be obtained from the micro . The ID of the sensor, setpoint of relay
> to be updated in each text box will be stored in the input tags ID
> attribute. The HTML page will be stored locally on the clients computer and
> Program A will load the HTML into a web browser when the client hit a button
> in Program A (which is connected to the micro).
>
> Before loading the HTML into a web browser I need Program A to parse the
> HTML and determine which value to load into which text box. Once Program A
> determines the values to be loaded and where to put them, it continually
> sends requests to the micro for the most updated values . Program A then
> updates the text boxes VALUE attribute with the correct value for that text
> box. I do need to continually update the text boxes and display the current
> value of the sensor, etc.
>
> I am having an issue determining how to parse the HTML page to find the
> <input> tags and get the IDs I need as well as updating the VALUE attribute
> of that <input> tag continually from Program A.
>
> I think that about covers it. If you have any questions , feel free to
> email me.
> Thank you in advance,
> Ray
>
> Ray A. Jaramillo
> Software Engineer
> Micro Control Systems
> 5877 Enterprise Parkway
> Fort Myers, Florida 33905
> Phone: (239) 694-0089
> Fax: (239) 694-0031
> Web: www.mcscontrols.com
>
>
>
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