JSP Page

function lookup() {
new Ajax.Request(‘namelookup.do’, {
parameters: {theId: $(‘theId’).value},
onSuccess: function(transport, json) {
if(json.executeError) {
alert(json.executeError);
}
else {
$(‘fullName’).value = json.fullName;
}
}
});
}

Hello World!

–%>

struts-config.xml
———————
<!– –>

JSP Page
———–

JSP Page

function lookup() {
new Ajax.Request(‘namelookup.do’, {
parameters: {theId: $(‘theId’).value},
onSuccess: function(transport, json) {
if(json.executeError) {
alert(json.executeError);
}
else {
$(‘fullName’).value = json.fullName;
}
}
});
}

Hello World!

Action Class
—————-
public class NameLookupAction extends org.apache.struts.action.Action {

/* forward name=”success” path=”" */
private static final String SUCCESS = “success”;

/**
* This is the action called from the Struts framework.
* @param mapping The ActionMapping used to select this instance.
* @param form The optional ActionForm bean for this request.
* @param request The HTTP Request we are processing.
* @param response The HTTP Response we are processing.
* @throws java.lang.Exception
* @return
*/
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {

String theId = request.getParameter(“theId”);

try {

//Do your database work here to grab the name and populate our HashMap hm
//In this example I’ll just hard-code the name though.

HashMap hm = new HashMap();
hm.put(“fullName”, “Joe Blow”);

//each key from our hash map becomes a key in our JSON object
JSONObject json = JSONObject.fromObject(hm);

//Plop it in the header so prototype can grab it.
response.setHeader(“X-JSON”, json.toString());

} catch (Exception e) {
HashMap hm = new HashMap();
hm.put(“executeError”, “Couldn’t find the Full Name because an error occured.”);

JSONObject json = JSONObject.fromObject(hm);

response.setHeader(“X-JSON”, json.toString());

}

return null;
}
}

struts-config.xml
———————-

can you please put a complete code, I would like to try it, run it .
thanks

return null;

no need for empty.jsp and struts-config.xml definition.

It will be nice if there are more exapmles on JSON.