How to create a Servlet Exception in jsp

Greetings,
I would like to know if someone knows how create a servlet exception in a JSP.
Thx

What for? new ServletException() - IIRC it's not abstract.

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How to create multiple toolbar buttons in jsp ?

hi all,
how to create multiple toolbar buttons in jsp ?
plz help me

mgmt
plzhttp://www.catb.org/~esr/faqs/smart-questions.html#writewell
How To Ask Questions The Smart Way
Eric Steven Raymond
Rick Moen
Write in clear, grammatical, correctly-spelled language
We've found by experience that people who are careless and sloppy writers are usually also careless and sloppy at thinking and coding (often enough to bet on, anyway). Answering questions for careless and sloppy thinkers is not rewarding; we'd rather spend our time elsewhere.
So expressing your question clearly and well is important. If you can't be bothered to do that, we can't be bothered to pay attention. Spend the extra effort to polish your language. It doesn't have to be stiff or formal ? in fact, hacker culture values informal, slangy and humorous language used with precision. But it has to be precise; there has to be some indication that you're thinking and paying attention.
Spell, punctuate, and capitalize correctly. Don't confuse "its" with "it's", "loose" with "lose", or "discrete" with "discreet". Don't TYPE IN ALL CAPS; this is read as shouting and considered rude. (All-smalls is only slightly less annoying, as it's difficult to read. Alan Cox can get away with it, but you can't.)
More generally, if you write like a semi-literate b o o b you will very likely be ignored. So don't use instant-messaging shortcuts. Spelling "you" as "u" makes you look like a semi-literate b o o b to save two entire keystrokes.

How to create the servlet as acontroller and how to use it

how to create the servlet as acontroller and how to use it

>
John
Please update your forum profile with a real handle instead of "914824".
When you have a problem you'll get a faster, more effective response by including as much relevant information as possible upfront. This should include:
<li>Full APEX version
<li>Full DB/version/edition/host OS
<li>Web server architecture (EPG, OHS or APEX listener/host OS)
<li>Browser(s) and version(s) used
<li>Theme
<li>Template(s)
<li>Region/item type(s)
With APEX we're also fortunate to have a great resource in apex.oracle.com where we can reproduce and share problems. Reproducing things there is the best way to troubleshoot most issues, especially those relating to layout and visual formatting. If you expect a detailed answer then it's appropriate for you to take on a significant part of the effort by getting as far as possible with an example of the problem on apex.oracle.com before asking for assistance with specific issues, which we can then see at first hand.
I am going to have over 50 buttons in a page, Why? This would be a most unusual UI paradigm. I've never seen such a page, which suggests that whatever you want to do is normally done another way. Please explain the requirement in more detail.
just wanted to know if its possible to do something like this in java.
Java is not used in programming APEX UI behaviour. Java and JavaScript may share initial syllables, but they are not closely related.
It's possible to achieve a great deal in JavaScript, but a clear definition of the requirements is necessary. Do you mean the buttons should be dynamically generated? If so, yes, this is possible in JavaScript. What would drive the process?
Also, i would like to have dynamic action on it, for example, when the button is pressed, fill a string of text into other items(text field) within the page. Without more detail its not possible to make any specific suggestions. For example, I certainly would not want to create 50+ individual dynamic actions relating to different buttons.

How to create a pie chart with jsp/servlet?

I want to create a servlet which can be used like below:
<img src="pieservlet?param1=<%=x%>&param2=<%=y%>&..." width="100" height="100" >
can you give me some guide?

Hai ,
I have implemented a trial working pie chart , dynamically created from jsp using ServletOutputStream , BufferedImage & JPEGImageEncoder (found in com.sun.image.codec.jpeg.* package & bundled along with jdk ) .
<%
ServletOutputStream sout = response.getOutputStream();
response.setContentType("image/jpeg");
BufferedImage img = new BufferedImage(400,400,BufferedImage.TYPE_INT_RGB);
Graphics2D gr = img.createGraphics();
/* Actually this will be got as values of request.getParameter */
Vector values = new Vector();
values.addElement(new String("45") );
values.addElement(new String("125") );
values.addElement(new String("75") );
values.addElement(new String("25") );
values.addElement(new String("90") );
// my demo class
temp.pieChart fr = new temp.pieChart(400,400,values);
/* This pieChart is class extends JFrame , in paint method of it all Drawing of pie chart using graphics2D fillArc done */
fr.paint(gr);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(sout);
encoder.encode(img);
sout.flush();
%>
Hope this helps to build your own custom pie chart .
Let me know if details needed on pieChart class
rakesh

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first, in auth.jsp we check fnd_global.user_name against "ANONYMOUS" to see whether user is logged on.
if not, we invoke AppsLocalLogin.jsp to create a session.
http://server:port/OA_HTML/AppsLocalLogin.jsp?requestUrl=report.jsp%3Fparam1%3Dyyy
the login page shows, page re-directed to report.jsp.
however fnd_global.user_name doesn't work. it still returns "ANONYMOUS".
if user logged on OA normally, then the whole thing worked. it seems fnd_global.user_name doesn't like the way we login.
how should we invoke AppsLocalLogin.jsp so it'll create a proper session?
part of report.jsp:
WebAppsContext ctx =WebRequestUtil.validateContext(request, response);
conn = ctx.getJDBCConnection();
sql = "select fnd_global.user_name from dual";
(we tried to invoke RF.jsp instead.
doesn't work because we don't know how to pass the param1 to report.jsp thru RF.jsp)

This is variable what is working in my aplication
String variable;
if(user == null){
               user=new String("");
     }//if you don'y do this you will have null pointer exception
session.setAttribute("user",user);//put value
          String name=(String)session.getAttribu("user");      //get value;
I hope this will help

How to create a servlet to be called by a portlet in weblogic workshop

Hey,
In weblogic workshop 8.1.4, I created a portal application. In the portlet(Java portlet- JSR 168), I would like to call a Java Servlet. In the workshop, it seems there is no way to create a Java Servlet.
Does anybody know how to create a Java Servlet in the Weblogic workshop?
Thanks!
Jeff

How about creating a java class and adding the proper imports, extends, methods etc. to make it a servlet.
Do the the necessary changes to web.xml
Then try to invoke it from the portlet's jsp of java code
HTH,
Raj

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Usually a child IE window uses same session with parent window. Dose someone know how to create a new session when creating a new IE window by clicking a URL in parent window? The web page is writen by jsp file.

I am not sure of your question. Are you wanting to have 2 Session objects (one for the parent window and another for the child)?
A session is usually created once per client and is stored on the server the session id is carried around in a cookie or a URL rewrite so that everytime the user submits a page you will be able to store/access information.
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Hope this helps

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Hi Experts,
I want to create a servlet in PAR application. This servlet should be capable of accessing the functions of other java files included in PAR Application. Servlet should be capable of accessing the functions say doContent(req, resp) of any class of PAR application.
Is it possible to create Servlet in PAR application?
I created one servlet but unable to declare its information in Deployment Descriptor.
Because the deployment which is provide ie portalapp.xml doesnt allow us to write tags like <servlet-name>, <servlet-mapping>, <url-pattern> etc. These are necessary for declaration of servlet.
So how can i write a complete working Servlet under PAR application?
Please help and replies will be appreciated.

Hi,
Depending upon your usecase there are different ways to implement this logic.
Check this for example (Read my answer in this post):
https://forums.sdn.sap.com/thread.jspa?threadID=349151
Also check these senarios:
http://help.sap.com/saphelp_nw70/helpdata/en/42/9ddf20bb211d72e10000000a1553f6/frameset.htm
http://help.sap.com/saphelp_nw70/helpdata/en/42/9ddcc9bb211d72e10000000a1553f6/frameset.htm
Also the delegation may be interesting for you:
http://help.sap.com/saphelp_nw70/helpdata/en/a0/44b742cafec96ae10000000a155106/frameset.htm
Greetings,
Praveen Gudapati

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How to create a session variable and add attributes to it?
For example i want to create a session variable called "name" and add value "user" to it? if i try to do it with setAttribute(), it is giving error as both is of type string? how to do it? kindly help me

This is variable what is working in my aplication
String variable;
if(user == null){
               user=new String("");
     }//if you don'y do this you will have null pointer exception
session.setAttribute("user",user);//put value
          String name=(String)session.getAttribu("user");      //get value;
I hope this will help

[Deploy Tool] How to create a Servlet?

Hello,
i try to assemble and deploy a java servlet with the deploy tool in NW4, but to no avail. I managed to use jsps succesfully, but up to now i failed with servlets.
When i try to access the WAS after deploying my exercise, i get:
<b>404 Requested resource ( Ue160/servlet/Login.class ) not found.</b>
The file Login.class, the directory /servlet and the URL mapping are defined in the file tab of 'J2EE Components'. As far as i can see the servlet container is unable to load the class file.
The servlet name is in red, so something is wrong. But i can build the war-file without any error messages.
Any hints?
I can't use the developer studio, because it does not work with NW4.
Message was edited by: Nico Manicone

hi jeff
1. I am not aware of any portal specific screen which can create this screen for you. However to create a servlet you will need to extend from the HttpServlet interface
2. To direct the request to your servlet from your jsr 168 portlet you could use the PortletRequestDispatcher getNamedDispatcher(String s) declared on PortletContext
Hope this helps
anand

How to create a servlet and write its details in DD in PAR Application

Hi Experts,
I want to create a servlet in PAR application. This servlet should be capable of accessing the functions of other java files included in PAR Application. Servlet should be capable of accessing the functions say doContent(req, resp) of any class of PAR application.
Is it possible to create Servlet in PAR application?
I created one servlet but unable to declare its information in Deployment Descriptor.
Because the deployment which is provide ie portalapp.xml doesnt allow us to write tags like <servlet-name>, <servlet-mapping>, <url-pattern> etc. These are necessary for declaration of servlet.
So how can i write a complete working Servlet under PAR application?
Please help and replies will be appreciated.

Hi Pankaj,
I don't think it is possible to write Servlet in portal applications.
I guess in Portal Application Projects we can develop portal components and portal services only.
Thanks and regards,
-Madhu

How to Include a servlet in a jsp

Hello,
My jsp pages are all tied to respective Servlets. So when I have to forward to a jsp, I forward to a servelt which redirects to that jsp.
Now I have a jsp page which has to include another jsp page.
So I am trying to include a servlet in my jsp page which inturn redirects itself to the included jsp.
Have tried doing the following
<jsp:include page="../../servlet/ServletName" flush="true">
</jsp:include>
does not work. It compiles well but no output
any ideas ????
~ Soumya

It does not seem to work... Let me give you the snippet of code I used.
calendarEntry.java - the parent jsp
<tr rowspan="60%">
<td width="100%">
     <jsp:include page="file://c:/../../servlet/MonthEventList">
     </jsp:include>
</td>
</tr>
MonthEventList.java - the included servlet
import javax.servlet.*;
import javax.servlet.http.*;
public class MonthEventList extends HttpServlet {
     * Attributes
     private static final String CONTENT_TYPE = "text/html";
     private HttpSession session;
     public void init() throws ServletException
     public void doPost(HttpServletRequest request,
HttpServletResponse response) throws
ServletException, IOException
          try {
          HttpSession session = request.getSession(true);
          String url;
     url = "/jsp/site/calendar/monthEventList.jsp";
                    //ReDirect to where the page is going
                    response.sendRedirect(url);
                    return;
          } catch (Exception ex) {
          String url="/jsp/site/calendar/main/servletError.jsp;
     response.sendRedirect(url);
          return;
     public void doGet(HttpServletRequest request,HttpServletResponse
response) throws ServletException, IOException
          doPost(request, response);
monthEventList.jsp
just displays some dummy data
So if this is the case, do you think the <jsp:include> can work ??
Thanks in advance
Soumya

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Hello,
i want to create online shopping cart using html and JSP.
At first i want to create 1html page where login ad logup optios are provided. After his login, a JSP page containing 3 links namly T-shirts,Jeanspat and Formals is displayed.
After user select any of the link it must go to particular page.
There, option of color, size is provided.
And some 5 to 6 items are displayed with its pfxd prices.
And in the same page a cart is provided. Whe the user selects(clicks) any item the same must display in cart.
In the same page link to T-shirts,Jeanspat and Formals is displayed agaiT-shirts,Jeanspat and Formals is displayed agaiT-shirts,Jeanspat and Formals is privided again.
next page must show the items selected. And finally it must show the "thank you" page stating that your delivary will be delivered to you within 24 hrs.
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Thanks for the idea but i need a more detail one...
Hi,
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operations in an application.So at applicatin launch
only multiple connections to the dbase are opened and
used and returned/closed after usage.
You can have a loop running 10 times creating a
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Collection object (say hashtable) marked with a key.
Then in the application code , take an available
connection from the hashtable and use it . After use
return /close the connection (your pool can be
incremental..creating 5 connections evey 10-15
minutes).

How to create a Servlet

Hello All,
I am trying to learn creating a servlet in oaf. Although I kind of understand the concept of a servlet....have doubts about where the servlet class file lives/resides? Does it matter where it resides....at least for now in the Jdeveloper environment?
The way I understand it is:
1) In the oaf page need to place the item in which the servlet result is displayed
2) In the PR of the CO of the above page, need to find the above item
2.1) set the source of the above item to be the servlet class while passing in the params into the set source call.
2.2) Does it matter where the servlet class file resides? ie., can it live anywhere in the project??
Pls. help me understand this concept.
Practially in steps2,3 of the servlet wizard of the Jdeveloper what do these do?
Step#2: URL Pattern
Step#3: Parameters. Do I have to necessarily set up the params here in this step or can they be dynamically set when the serveletis invoked in the PR of the CO? If yes, could you pls. provide a sample code. If params can be done either way...which way is effective. Reason for asking is....in my other post, I mentioned that while trying to create a dynamic VO, it seemed to force me to explicitly set the sql statement instead of simply running the sql statement associate with the VO of the page (I am not sure why it is like that...but that worked)
Thanks,
Edited by: OAF_Monkey on Nov 16, 2012 4:11 PM

The way I understand (after following several older posts) is
1) When my destination page (say page2 renders), in the CO need to find the image item/bean (I am assuming bean and an item mean the same)
2) After finding the item item/bean, need to set its source as "ReadImage" telling it to go get it from the web.xml while passing in the id
for which it needs to find an image/blob in the db.
At this point, if it finds the class "ReadImage" then it should get the
2.1)db connection
2.2)get the parameter passed in using
      String image_id = request.getParameter("s1");
     2.3)get the sql statement provided
2.4)get the image/blob as an input stream and write to the output stream using the below
        InputStream in = null;
        in = rs.getBinaryStream("IMAGE");
     Below is my code in the PR of CO
      System.out.println("I am back in the IMG CO : primaykey val is "+ s1 );
BP1--> OAImageBean imageItem = (OAImageBean)webBean.findIndexedChildRecursive("SJImage");
      System.out.println("I am back in the IMG CO1 : after finding the image item" );
BP2-->     if (imageItem !=null ){
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BP3-->     imageItem.setSource("/OA_HTML/WEB-INF/ReadImage?id=" + s1);
      System.out.println("I am back in the IMG CO3 : after setting the source of the image item" + imageItem.getSource());
      }When I ran it in the debug mode (break points shown above BP1,2,3), I can see that the value is getting passed in ok with the 's1' at BP1 and BP2.
However when it reaches BP3, if I expand all the nodes of the debug window, I can see that in the 'Statisfields of the CO', it shows
"Failed to establish the database connection." for the "DBCONNECT_ERROR_MSG" node.
In the "ReadImage" class file the code to get connection is shown below:
    public void init(ServletConfig config) throws ServletException {
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        throw new UnavailableException(exception.getMessage());
    }In the doPost method:
        if (conn == null)
        try
        WebAppsContext ctx = null;
        ctx = WebRequestUtil.validateContext(request, response);
        ctx = WebRequestUtil.createWebAppsContext(request, response);
        conn = ctx.getJDBCConnection();
        stmt = conn.createStatement();
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Thanks,

How to create a Servlet Exception in jsp

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