I have created a sample portlet to show the suggestion by calling ajax:-
The sample jsp for calling the ajax as above is:
<%@page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" session="false"%>
<%@taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet"%>
<portlet:defineObjects />
<script type="text/javascript">
function createXMLHttpRequestObject() {
var xmlHttp;
try {
xmlHttp = new XMLHttpRequest();
} catch (e) {
try {
xmlHttp = new ActiveXObject("Microsoft.XMLHttp");
} catch (e) {
}
}
if (!xmlHttp)
alert("Error creating the XMLHttpRequest object.");
else
return xmlHttp;
}
var xmlHttp = createXMLHttpRequestObject();
function makeResourceCall(str){
if (str.length==0)
{
document.getElementById("txtHint").innerHTML="";
return;
}
if (xmlHttp){
var newvalue ="Harish"+str;
try{
var url ="<portlet:resourceURL></portlet:resourceURL>?txtValue="+str;
xmlHttp.open("GET", url, true);
xmlHttp.onreadystatechange = handleRequestStateChange;
xmlHttp.send(null);
}catch (e){
alert("Can't connect to server:\n" + e.toString());
}
}
}
function handleRequestStateChange(){
if (xmlHttp.readyState == 4){
if (xmlHttp.status == 200){
if(xmlHttp.responseText == "")
{
document.getElementById("txtHint").style.display="none";
}
else
{
document.getElementById("txtHint").style.display="block";
document.getElementById("txtHint").innerHTML=xmlHttp.responseText;
}
}
}
}
</script>
Enter Name<input type="text" name="txtValue" onkeyup="JavaScript:makeResourceCall(this.value)" >
<!-- <p>Suggestions: <span id="txtHint"></span></p> -->
<TEXTAREA name="annotationTxt" rows="10" cols="30" style="overflow:hidden;" id="txtHint" maxlength="235"></TEXTAREA>
<script>
function onload()
{
document.getElementById("txtHint").style.display="none";
}
onload();
</script>
Onkeyup I am calling makeResourceCall and from makeResourceCall function calling <portlet:resourceURL>
From this the control will go the portlet class and will call the serverResource method:
public void serveResource(ResourceRequest request, ResourceResponse response)
throws PortletException, IOException {
System.out.println("Entering ValidationCacheSamplePortlet.serveResource()");
response.setContentType("text/html");
System.out.println("String input value"+request.getParameter("txtValue"));
inserRec rec = new inserRec();
List list = rec.getData(request.getParameter("txtValue"));
for (Iterator iterator = list.iterator(); iterator.hasNext();)
{
HibernateprjPojo pojo = (HibernateprjPojo) iterator.next();
response.getWriter().println(pojo.getName());
}
In the serve resource method I am making a hibernate call and fetching the related values for txtValue.
From the getwritter the result will be shown in the drop down box.
