Bharat Makwana

Hi All,

please suggest me some good books on hibernate, spring, UML and algorithms.

Hi Prashanth try this

prepare you template say userTemplate.vm
#foreach( $user in $!{userList}) Name : $!{user.name} ID : $!{user.id} #end

you have to put userList object in velocity context. for this do the following

public String someMethod(){ Velocity.init(); List<User> uList = getUserList(); // some method which returns the list of User VelocityContext context = new VelocityContext(); context.put("userList", uList); String buffer = new String(); try{ buffer = velocityProcessor.process("../path/to/your/template_vm_file/userTemplate.vm", context); }catch (Exception e) { logger.log(Level.SEVERE, "Can't find the template.", e); } return buffer; }

Hi All,

I tried to used velocity tags instead of using plain html tags. I copied velocity tags from following url
http://struts.apache.org/2.0.14/docs/velocity-tags.html
#sform ("action=Login") #stextfield ("label=First name" "name=firstName") #ssubmit ("value=Submit")
and tried to access .vm file, but it throws following exception, strange thing is that it throws exception when i use #sform tag, if i just use #stextfield and #ssubmit, it does not throw any exception both text field and submit button are appearing properly.

can someone help me with this exception please ?


Velocity version : 1.6
Velcocity tool : 1.4



javax.servlet.ServletException: org.apache.velocity.exception.ParseErrorException: Encountered "<EOF>" at /vm/publisher/placement/newPlacement.vm[line 168, column 2] Was expecting one of: "(" ... <RPAREN> ... <ESCAPE_DIRECTIVE> ... <SET_DIRECTIVE> ... "##" ... "\\\\" ... "\\" ... <TEXT> ... "*#" ... "*#" ... <STRING_LITERAL> ... <END> ... <IF_DIRECTIVE> ... <STOP_DIRECTIVE> ... <INTEGER_LITERAL> ... <FLOATING_POINT_LITERAL> ... <WORD> ... <BRACKETED_WORD> ... <IDENTIFIER> ... <DOT> ... "{" ... "}" ... org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:515) org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:422)

Thanks for the replies guys ! But can anybody tell me how should I handle such requirement ?

I am thinking of appending all the key value [comma separated] to a hidden field and same for the value field is this good approach ?

Thanks
Bharat

Hi there,

my code dynamically add two input fields for key and value which I want to retrieve at server side in a servlet code.[in following code I have shown two only ]
Key : <input name="key"> Value : <input name="value"> Key : <input name="key"> Value : <input name="value">

Can anyone tell me how should I retrieve these key and value at server side please?

If I use request.getParameterValues("key") [assume first key has value 'Name' and second has 'Surname'], at server side I recieve String array, is it guaranteed that they will be in order i.e array[0] = Name and array[1] = Surname ?

Thanks
Bharat

Hi Tom,

Thank you very much for your time and reply, problem solved. There was a silly mistake in my previous code.
updated code for getData() method would be
public byte[] getData() { InputStream in = null; ByteArrayOutputStream imageByte = new ByteArrayOutputStream(1024); try { HttpURLConnection conn; String urlStr = "http://chart.apis.google.com/chart?cht=lc&chs=300x250&chxt=x%2Cy&chxs=$&chxl=0%3A|1%20amn|2%20am|3%20am|4%20am|5%20am&chdlp=bv&chco=ff7f00%2C339999%2Ccc9966&chxr=1%2C59%2C1170&chd=t:40,20,50,20,100|75,74,66,30,10"; URL url = new URL(urlStr); conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); byte[] data = new byte[1024]; in = conn.getInputStream(); int length; while ((length = in.read(data)) != -1) { imageByte.write(data, 0, length); } } catch (IOException ex) { ex.printStackTrace(); } finally { if (in != null) { try { in.close(); } catch (IOException ex) { ex.printStackTrace(); } } } System.out.println("Returning Image............"); return imageByte.toByteArray(); }

Thanks again,
Bharat

Hi All,

I am facing some problem with my servlet code, I am trying to display the image returned by 3rd party server in the browser.
But it gives me error : The image “http://localhost:8080/velocity/googlechart/” cannot be displayed, because it contains errors.

code is as follows, can someone tell me what I'm doing wrong here ?

in the code,

String urlStr = "http://chart.apis.google.com/chart?cht=lc&chs=300x250&chxt=x%2Cy&chxs=$&chxl=0%3A|1%20amn|2%20am|3%20am|4%20am|5%20am&chdlp=bv&chco=ff7f00%2C339999%2Ccc9966&chxr=1%2C59%2C1170&chd=t:40,20,50,20,100|75,74,66,30,10";

is the .png image url.

public class HTTPConnection extends HttpServlet{ @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { byte [] data = getData(); resp.setContentType("image/PNG"); resp.getOutputStream().write(data); } public static byte [] getData(){ HttpURLConnection.setFollowRedirects(false); HttpURLConnection conn; ByteArrayOutputStream boi =new ByteArrayOutputStream(); try { String urlStr = "http://chart.apis.google.com/chart?cht=lc&chs=300x250&chxt=x%2Cy&chxs=$&chxl=0%3A|1%20amn|2%20am|3%20am|4%20am|5%20am&chdlp=bv&chco=ff7f00%2C339999%2Ccc9966&chxr=1%2C59%2C1170&chd=t:40,20,50,20,100|75,74,66,30,10"; URL url = new URL(urlStr); conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); int ii = -1; try { BufferedReader inp = new BufferedReader(new InputStreamReader( conn.getInputStream())); while (( ii = inp.read()) != -1) { boi.write(ii); } inp.close(); } catch (Exception e) { } } catch (IOException e) { e.printStackTrace(); } return boi.toByteArray(); } }

Thanks,
Bharat

Finally

$velocityCount is the answer.

Thanks verybody.
~Bharat

Hi there,

one can use struts2.x's tag libraries in jsp using <taglib>, how to use these tag libraries in .vm(velocity template) file ?

anyone ?

Thanks,
Bharat

I am using velocity-1.6.1.jar,velocity-tools-*-1.4.jar.
velocity.properties is

resource.loader = file
file.resource.loader.class = org.apache.velocity.runtime.resource.loader.FileResourceLoader
file.resource.loader.path = D:/eclipse/workspace/manager/WebContent/vm
file.resource.loader.cache = true
file.resource.loader.modificationCheckInterval = 2

Thanks,
Bharat

yes Ulf, I tried $foreach.count then it produces
$foreach.count . Not
$foreach.count . my
$foreach.count . fault

saw some stringe behavior when I use $!{foreach.count} output is

. Not
. my
. fault


~Bharat

Hi All,

I am trying to iterate through a string array, also want to print the iteration number,
#foreach ( $item in ["Not", "my", "fault"] ) ${foreach.count} . $!{item}<br> #end
output should be,
1. Not
2. my
3. fault

but when it produces,
${foreach.count} . Not
${foreach.count} . my
${foreach.count} . fault

Anyone can tell what's going wrong here ? on server console I get
INFO: Velocity [debug] Null reference [template '/Test.vm', line 3, column 13] : $foreach.count cannot be resolved.

Thanks
Bharat

thank you David.

-Bharat

Hi All,

I am doing some basic tutorials in velocity, i am familiar with jsp, my question is do I always have to put java class (may be bean) object in context to use it in .vm file ?
or there is other way like the one in jsp we can create bean object using <useBean> ?

Thank you.
Bharat

Hi there,

I am using org.w3c.dom.Dom parser to parser my XML document.
one Node in that xml is
<image> <url> http://server-img.ppapi.com/transcode?refresh=true&location=http://ad.pp.com/adserver/image%3fpath%3db0a18ef22074416d9f2c01d73cf9adc4.jpg&qpub=0&dfmt=jpg </url> </image>
I am using following code to get url node value

List l = dom.getElementsByTagName("url"); if(l != null && l.getLength() > 0) { Element el = (Element)l.item(0); primarypair.put("imagesrc", el.getFirstChild().getNodeValue()); }


and I am putting that value in one hashtable, but getNodeValue() method only returns http://server-img.ppapi.com/transcode?refresh=true from url node, it's not returning location=http://ad.pp.com/adserver/image%3fpath%3db0a18ef22074416d9f2c01d73cf9adc4.jpg&qpub=0&dfmt=jpg after '&', it should return full value like
http://server-img.ppapi.com/transcode?refresh=true&location=http://ad.pp.com/adserver/image%3fpath%3db0a18ef22074416d9f2c01d73cf9adc4.jpg&qpub=0&dfmt=jpg

Any help is highly appreciated !

Thanks,
Bharat