This is great I am able to get the String of all shows. But my ultimate
goal was to get the result and populate in the select box.
I am using AJAX since second box (charater) content depends upon first
select box (tvshow). SO I need to parse String or is there any easy way
to get values so that I can use that to populate the select box.
Also when I was looking at the script on the JSP I was wondering how can
I use that string to populate the select box.
<script>
var req;
var which;
function retrieveURL(url) {
if (window.XMLHttpRequest) { // Non-IE browsers
req = new XMLHttpRequest();
req.onreadystatechange = processStateChange;
try {
req.open("GET", url, true);
} catch (e) {
alert(e);
}
req.send(null);
} else if (window.ActiveXObject) { // IE
req = new ActiveXObject("Microsoft.XMLHTTP");
if (req) {
req.onreadystatechange = processStateChange;
req.open("GET", url, true);
req.send();
}
}
}
function processStateChange() {
if (req.readyState == 4) { // Complete
if (req.status == 200) { // OK response
var data = req.responseText;
alert(data);
document.getElementById("characters").innerHTML = data;
} else {
alert("Problem: " + req.statusText);
}
}
}
</script>
<html:form action="doSome">
<html:select property="show" onchange="retrieveURL('GetChars.do?tvID=' +
this.value);">
<html:options collection="showList" property="showId"
labelProperty="showName" />
</html:select>
<br/>
Characters: <span id="characters"></span>
<html:submit />
</html:form>
On 9/28/2011 10:41 AM, Christian Grobmeier wrote:
Hi Ajib,
public ActionForward execute(ActionMapping mapping, ActionForm inForm,
HttpServletRequest request, HttpServletResponse response) throws Exception {
// Get a list of characters associated with the select TV show
String tvShow = (String) request.getParameter("tvShow");
if (tvShow == null) {
tvShow = "";
}
// use a json lib, like: http://code.google.com/p/jjson/
// to generate json from an arrayList
List<String> character = getCharacters(tvShow);
JSONArray arr = new JSONArray();
for (String string : character) {
arr.add(new JSONString(string));
}
String responseString = arr.toJSON();
// use text/plain:
response.setContentType("text/plain");
PrintWriter out = response.getWriter();
// use response String
out.println(responseString);
out.flush();
return null; // Not forwarding to anywhere, response is fully-cooked
} // End execute()
How can I avoid creating HTML in action class and send the Arraylist /JSON
to view?
Similar to that. :-)
Cheers
Christian
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