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Thread: Google Webservice Problem

  1. #1
    Junior Member
    Join Date
    Nov 2010
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    Unhappy Google Webservice Problem

    Hi, I am new to the forums here and was hoping someone could help me out. I have been working on this project and have been stuck for quite a while now(almost a week). I am learning about how to connect java to the web and would like to do the example of connecting to a google webservice. (specifically the geocoding webservice) I have created a valid URL I know because it works in the browser, but I just get a thrown exception (http 400---bad request) when I try to call upon the URL from my java code.

    Thanks in advance for any help. I'm truly stumped!

    private void searchGoogle(String street, String city, String state)
            URL url = null;
            URLConnection connection = null;
            InputSource inputxml = null;
            NodeList nodes = null;
            Permission per= null;
            //run a search on google server and display results in list
            XPathFactory factory = XPathFactory.newInstance();
            XPath xpath = factory.newXPath();
            //replace all spaces in search strings with "+"
            street.replace(' ', '+');
            city.replace(' ', '+');
            state.replace(' ', '+');
            String request = "http://maps.googleapis.com/maps/api/geocode/xml?address=";
            request = request.concat(street);
            request = request.concat(",+");
            request = request.concat(city);
            request = request.concat(",+");
            request = request.concat(state);
            request = request.concat("&sensor=false");
                url = new URL(request);
                connection = url.openConnection();
                inputxml = new InputSource(connection.getInputStream());
                nodes = (NodeList) xpath.evaluate("XPATH_EXPRESSION", inputxml, XPathConstants.NODESET);
            catch(Exception MalformedURLException){
                System.out.print("connection error");
            // We can then iterate over the NodeList and extract the content via getTextContent().
          // NOTE: this will only return text for element nodes at the returned context.
          for (int i = 0, n = nodes.getLength(); i < n; i++) {
            String nodeString = nodes.item(i).getTextContent();
    Last edited by copeg; November 14th, 2010 at 08:35 PM.

  2. #2
    Administrator copeg's Avatar
    Join Date
    Oct 2009
    Thanked 833 Times in 772 Posts
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    Default Re: Google Webservice Problem

    First, be sure you are not violating the google terms of use. Second, set the User-Agent request property for the URLConnection. I cannot recall the exact code, but something like:
    connection.setRequestProperty("User-Agent", "Mozilla 6.0");
    Again, not sure if the above will work but you should be able to find several examples with a google search on how to set the user agent. Lastly, be sure you are not violating the google terms of use.

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