Calling Servlet clicking on applet

I've a jsp page through which one map is displayed using applet. Now when user will click on that map(i.e the applet), one Servlet will be called that will display some data related to that map. Is it possible to do this? If yes, how? Plz help me. It's urgent.

You have to catch the click event using a MouseListener.
And then if you want the user to be sent to a different url you can use
getAppletContext().showDocument("the url", "_self");if you want your applet to invoke the sevlet inside it programatically and stay within the same page you can use java.net.URL to do this.
please read the java documentation or search the web for samples.

Similar Messages

About calling servlet from an applet

In one of my jsp, I have an applet which is to call a servlet. When I run it, I get an error in the status bar of IE. It says 'Exception: java.lang.runtimeException: java.security.AccessControlException: access denied (java.net.SocketPermission localhost:8080....)'
Does anybody have similar experience?
Thanks,
Joe

hi;
to call a servlet from applet i give you a link:http://www.j-nine.com/pubs/applet2servlet/Applet2Servlet.html.
read cearfuly, and if you have any question you can post it to me?
goodluck

Help needed to call a servlet from an applet

Hi,
can someone help me with the way to call a servlet from an applet.
actually on click of a button i wanna call my servlet and save some data in DB.
i am not able to call my servlet. see the sample code which i am trying..
public void actionPerformed(ActionEvent event) {
if (event.getActionCommand().equals("Upload")) {
try {
System.out.println("Upload button has been clicked -----------");
URL url = new URL("http://localhost:8084/uploadApp/TestServlet");
URLConnection urlConnection = url.openConnection();
urlConnection.setDoInput(true);
urlConnection.setDoOutput(true);
urlConnection.setUseCaches(false);
ObjectOutputStream objOut = new ObjectOutputStream (urlConnection.getOutputStream());
objOut.writeBytes(userId); // pass parameter to servlet
objOut.flush();
objOut.close();
} catch (MalformedURLException ex) {
Logger.getLogger(ButtonListener.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(ButtonListener.class.getName()).log(Level.SEVERE, null, ex);
is there any problem with the code? please suggest.

hii,
checkout my add from, HTH
[http://forums.sun.com/thread.jspa?threadID=5419921&messageID=10885709#10885709]
... kopik

How to call servlet from applet residing in Oracle9i forms bean area.

Dear Members
I have an applet which is calls a servlet for database operations. If access this from a browser it works fine as the applet is signed. But When i place this applet in a bean area of Forms in Oracle 9i. It gives access control exception. Can anyone help me, as i feel this problem is with oracle9i forms.

Dear Members
I have an applet which is calls a servlet for database
operations. If access this from a browser it works
fine as the applet is signed. But When i place this
applet in a bean area of Forms in Oracle 9i. It gives
access control exception. Can anyone help me, as i
feel this problem is with oracle9i forms.As far as I recall - Oracle 9i forms is operating on a top of another special/internal servlet. I can't really recall, since I've been working with Oracle 9i forms 2 yrs ago. So total procedure looks like following:
applet -> Oracle 9i Forms servlet -> my servlet
instead of
applet -> my servlet
I think this is an actual reason why your signed applet can't work with your servlet.
Oracle 9i servlet has a number configuration files, I think among them you should change smth to get your construction working. Another approach would be to use servlet filtering before calling Oracle 9i servlet
Hopefully it will help
Paul

How to call a method in the servlet from an applet

I want to get the data for the applet from the servlet.
How to call a method that exits in the servlet from the applet? I want to use http protocol to do this.
Any suggestions? Please help.
thanks

Now that Web Services is around, I'd look at possibly implement a Web Service call in your applet, which can then be given back any object(s) on return. Set up your server side to handle Web Service calls. In this way, you can break the applet out into an application should you want to (with very little work) and it will still function the same

Applet that calls servlet

How to achieve something like this: i ve got a simple applet that calls servlet or JSp. when i get the response i would like to show it like a new page canceling the previous one with applet. Please Help. I have no idea how to using the data from response produce a new page. Nay resources hints??

In the second case:
You want to use the URL and URLConnection to POST or GET information to the server
that the applet came from (if not you have to sign the applet or set up policy).
The response from the server should be opened in a new window.
To post the data:
http://javaalmanac.com/egs/java.net/Post.html
This will get you a string, after you got that string you can use JSObject to call a javascript
method.
for example your applet:
import netscape.javascript.*; // either in jaws.jar or plugin.jar in your lib dir
..... extends Applet{
public Sting newpage;
... method that opens URLConnection and receives response in strRes
this.newpage = strRes
JSObject win;
win = JSObject.getWindow(this);
win.eval("methodThatOpensWindow()");
The html page looks like
<object ...... id="myapplet" myascript="true">
function methodThatOpensWindow(){
var win = window.open('','','');
win.document.write(document.getElementById("myapplet").newpage);
...

How to call JSP page from applet?

I have some page1.jsp from which I call applet.
User works with this applet but some information does not in date inside applet.
So user click on some component at applet (some button etc.) and now I would like to do this:
1) open new window;
2) call page2.jsp at this new window.
The reason is that page2.jsp will read some data from database and then displays it in HTML inside page2.jsp itself. It is not necessary to pass these date back to applet for displaying them inside of applet.
So user then can have 2 windows: page1.jsp with applet and page2.jsp with some details information.
But I DO NOT know how to call page2.jsp from applet, and do ti in a new window. Is it possible and how?
Thanks
Mirek

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MainMenu extends JApplet implements ActionListener
     private JMenuBar mbar;
     private JMenu Master,Leave,Report,Logout;
     private JMenuItem UserMaster,DeptMaster,DesignationMaster,LeaveAvailable,LeaveApply,Generate;
     private JPanel jp;
     public void init()
          mbar=new JMenuBar();
          Master=new JMenu("Master");
          Leave=new JMenu("Leave");
     Report=new JMenu("Report");
          Logout=new JMenu("Logout");
          UserMaster=new JMenuItem("UserMaster");
          UserMaster.setMnemonic('U');
          DeptMaster=new JMenuItem("DeptMaster");
          DeptMaster.setMnemonic('D');
          DesignationMaster=new JMenuItem("DesignationMaster");
          DesignationMaster.setMnemonic('D');
          LeaveAvailable=new JMenuItem("LeaveAvailable");
          LeaveAvailable.setMnemonic('L');
          LeaveApply=new JMenuItem("LeaveApply");
          LeaveApply.setMnemonic('L');
          Generate=new JMenuItem("Generate");
          Generate.setMnemonic('G');
          Master.add(UserMaster);
          Master.add(DeptMaster);
          Master.add(DesignationMaster);
          mbar.add(Master);
          Leave.add(LeaveAvailable);
          Leave.add(LeaveApply);
          mbar.add(Leave);
          Report.add(Generate);
          mbar.add(Report);
          mbar.add(Logout);
          UserMaster.addActionListener(this);
          DeptMaster.addActionListener(this);
          DesignationMaster.addActionListener(this);
          LeaveAvailable.addActionListener(this);
          LeaveApply.addActionListener(this);
          Generate.addActionListener(this);
          Logout.addActionListener(this);
          mbar.setVisible(true);
          Container con=getContentPane();
          con.add(mbar,BorderLayout.NORTH);
     public void actionPerformed(ActionEvent ae){
          if(ae.getSource()==UserMaster)
          }

Jsp file calling servlet two times

hello
i have created registration form for hospital management project in which registration form is jsp file on clicking on submit it calls servlet file which actually inserts data into database but problem is when i click on submit button it calls servlet file more than one time which leads to duplication of data.plz help in this matter, It is very important to me

First question is are you absolutely sure that the form is being submitted twice? Did you look at the access logs to see that there are two Http requests being sent to the server?
In tomcat you have to enable the access logs.

A servlet From an applet

Dear friends,
Hope you are doing well.
I am facing a problem of how to call a servlet from an applet.
Any help , please forward it.
thanks
vishal

You can communicate with servlet from an applet, using URL connection, and then send POST/GET methods through HTTP protocol, here is a code snippet,
// applet side, this method will send a POST method to the servlet and then get url openstream to read a
// returned object from the servlet, params should be in the form param1=value&param2=value etc...
public Object getObjectFromServlet(String servletName,String params) {
    Object object = null;
    try {
      URL url = new URL(codeBase,
                        contextRoot + servletName + params);
      URLConnection con = url.openConnection();
      con.setUseCaches(false);
      InputStream in = con.getInputStream();
      ObjectInputStream result = new ObjectInputStream(in);
      object = result.readObject();
      result.close();
      in.close();
    catch (ClassNotFoundException ex) {
      System.err.println("ClassNotFoundException caught:" + ex.getMessage());
    catch (MalformedURLException ex) {
      System.err.println("MalformedURLException caught:" + ex.getMessage());
    catch (IOException ex) {
      System.out.println("IOException caught:" + ex.getMessage());
    return object;
//servlet side
public void doPost(HttpServletRequest request, HttpServletResponse response){
      //Extract all the necessary supplied parameters from the request object and configurations.
       String param1 = request.getParameter("param1");
       String param2 = request.getParameter("param2");
try {
        ObjectOutputStream out = new ObjectOutputStream(response.getOutputStream());
        out.writeObject(object);
        out.close();
      catch (IOException ioe) {
        System.err.println("IOException caught:" + ioe.getMessage());
}

Error while calling servlet in WebLogic

Hi,
We are trying to call servlet in WebLogic by using http://scrmskr.apac.nsroot.net:7801/forms/HelloWorldServlet URL and getting
below error.
========================================================================
Error 404--Not Found
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
10.4.5 404 Not Found
The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.
If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.
========================================================================
Here we are calling HelloWorldServlet servlet which is kept in below path
/rcrmap2/weblogic/bea/user_projects/domains/frmrep_rcrms/servers/WLS_FORMS/tmp/_WL_user/formsapp_11.1.1/e18uoi/war/WEB-INF/classes
Entries for HelloWorldServlet in web.xml:
========================================================================
<servlet>
<servlet-name>HelloWorldServlet</servlet-name>
<servlet-class>HelloWorldServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>frmservlet</servlet-name>
<url-pattern>/frmservlet/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>HelloWorldServlet</servlet-name>
<url-pattern>/HelloWorldServlet*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>lservlet</servlet-name>
<url-pattern>/lservlet/*</url-pattern>
</servlet-mapping>
========================================================================
HelloWorldServlet.java:
===============================================================================
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class HelloWorldServlet extends HttpServlet {
public void service(HttpServletRequest req,
HttpServletResponse res)
throws IOException
// Must set the content type first
res.setContentType("text/html");
// Now obtain a PrintWriter to insert HTML into
PrintWriter out = res.getWriter();
out.println("<html><head><title>" +
"Hello World!</title></head>");
out.println("<body><h1>Hello World!</h1></body></html>");
===============================================================================
Please share your inputs as to what needs to be done for the same.
Thanks & Regards,
Harish

Hi Jay,
Please also find forms.conf_ entries
========================================================================
# Name
# forms.conf - Forms component Apache directives configuration file.
# Purpose
# It should include the weblogic managed server (routing) directives for
# the servers where Forms applications are deployed and other miscellaneous
# Forms component OHS directives.
# Remarks
# This file is included with the OHS configuration under
# $OI/config/OHS/<OHS Node Name>/moduleconf sub-directory.
# virtual mapping for the /forms/html mapping.
RewriteEngine on
RewriteRule ^/forms/html/(..*) /workaroundhtml/$1 [PT]
RewriteRule ^/rcrms/html/(..*) /workaroundhtml/$1 [PT]
AliasMatch ^/workaroundhtml/(..*) "/rcrmap2/weblogic/bea/rcrms/config/FormsComponent/forms/html/$1"
AliasMatch ^/forms/frmjscript/(..*) "/rcrmap2/weblogic/bea/user_projects/domains/frmrep_rcrms/servers/WLS_FORMS/tmp/_WL_user/formsapp_11.1.1/e18uoi/war/frmjscript/$1"
AliasMatch ^/rcrms/icons/(..*) "/rcrmap2/weblogic/bea/ORA_PFRD/forms/java/$1"
# Virtual path mapping for Forms Java jar and class files (codebase)
AliasMatch ^/forms/java/(..*) "/rcrmap2/weblogic/bea/ORA_PFRD/forms/java/$1"
# Virtual path mapping for testcrms (codebase)
AliasMatch ^/rcrms/java/(..*) "/rcrmap2/weblogic/bea/ORA_PFRD/forms/java/$1"
AliasMatch ^/forms/(..*) "/rcrmap2/weblogic/bea/user_projects/domains/frmrep_rcrms/servers/WLS_FORMS/tmp/_WL_user/formsapp_11.1.1/e18uoi/war/WEB-INF/classes/$1"
AliasMatch ^/rcrms/(..*) "/rcrmap2/weblogic/bea/user_projects/domains/frmrep_rcrms/servers/WLS_FORMS/tmp/_WL_user/formsapp_11.1.1/e18uoi/war/WEB-INF/classes/$1"
AliasMatch ^/rcrms/WebCLAuth/* rcrms
<Location /forms>
SetHandler weblogic-handler
WebLogicHost kauh0079
WebLogicPort 8001
</Location>
========================================================================
Thanks & Regards,
Harish

How to call servlets in sunone webserver

hi,
I am using sunone web server , I deployed but how to call servlets in sunone webserver any one tell me
bye

Typical URL structure is like this:
http://<myServer>:<myPort>/servlet/<fully qualified class name of my servlet>Unless you have configured a different servlet mapping ...

Call a JSP from applet and display the results in the browser

Hello All,
I have written an applet which performs some functionality at the clinets browser. When the applets method finishes exectution, I would like to call
a jsp. The results of the JSP should be displayed like a normal page in the browser.
I tried creating a HttpURLConnection and calling the jsp but two things happened
1. The jsp call failed because the applet doesn't have a valid session id.
2. even if I disable the valid user check at the jsp, the results of the jsp are returned as a set of bytes to the applet. They are not displayed in the browser window.
Then I tried applet.getAppletContext().showDocument()... However with this api I cannot do a POST operation on the JSP with some input data because this takes only a URL as an input parameter.
Please help me in this problem and I will be very gratefull to you.
1. applet uses the same session id as the browser so that when applet makes a request to the jsp it does not get user invalid exception.
2. the results of the jsp are displayed on the browser and not given to the applet.
Thank you so much for your help.
regards,
Abhishek.

I hope this can help you
I made a package calls fun
and a clsss calls JspTestingFun
package fun;
public class JspTestingFun{
private String sample = "welcome to jsp";
//Access sample property
public String getSample() {
    return sample;
//Access sample property
public void setSample(String newValue) {
    if (newValue!=null) {
      sample = newValue;
}then I make a jsp file
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="http://java.sun.com/jstl/sql" prefix="sql" %>
<%@ page import = "fun.JspTestingFun"%>
<html>
<head>
<title>
jspTest
</title>
</head>
<jsp:useBean id="mytest" scope="session" class="fun.JspTestingFun" />
<jsp:setProperty name="mytest" property="*" />
<body bgcolor="#ffffff">
<%
mytest.getSample();
%>
<h1>
Just for testing
</h1>
<form method="post">
<br>Enter anything   : <input name="sample"><br>
<br><br>
<input type="submit" name="Submit" value="Submit">
<input type="reset" value="Reset">
<br>
this what we get<jsp:getProperty name="mytest" property="sample" />
</form>
</body>
</html>

Calling servlet from a backing bean

hi guys i need to call a servlet from a backing bean in JSF. how do i do that ?
The scenario is i have to call servlet on a different machine from my backing bean . I also need to pass an object to the servlet .
This object contains data which must be manipulated and inserted in the database by the calling servlet.
I also want that after insertion in the db the control must be passed to the backing bean .
Is this all possible???
Please help

You may want to investigate the built in java.net.URL class. For advanced needs, Apache has a Java HTTP client library.

Calling servlet from a java program

Hi
I need to call a servlet's doPost() method from a java program. I have a specific situation, where I need to call servlet from a java program. DUring this call I need to pass a file and two string to the servlet. Servelt after receiving the file and string uploads the file to the server at a specified location. I am stuck up as how to call servlet from a java program instead of a HTML or JSP.
Can anyone help me to start with this.
any suggestion is welcome.

You have to establish a URLConnection with servlet from your java program.
URL servletURL = new URL("http://localhost:8080/Myservlet?str1=abc&str2=def");
URLConnection servletConnection = servletURL.openConnection();you can get the objectOutputStream
ObjectOutputStream oos = new ObjectOutputStream (servletConnection.getOutputStream());
oos.writeObject(your file object);-------------------------------------------------
In the servlet u can get the strings using request.getParameter("str1");
In the servlet u can get the strings using request.getParameter("str2");
file = new ObjectInputStream (request.getInputStream()).readObject()a lot of resources are available on this ...
hope this helps :)

Calling Servlet from a java prog?

Hi all,
I am calling servlet from a java prog (Java Agent in Lotus Notes) by using URL and URLConnection object. how can i trigger the Servlet By using doPost method .I have to send some parameter also.
Thanx
Muthu

you need to open a connection to the servlet. Then you must call getInputStream() and getOutputStream() and use them in any way you see fit. I was trying this before and could not get POST to work unless I openned the input stream from the servlet. Strange... but doGet worked without openning the input stream???
// open a connection....
// write to the servlet
servletConnection.getOutputStream().write("whatever");
servletConnection.getOutputStream().flush();
servletConnection.getOutputStream().close();
// grab what the servlet sends back, required to do a post.
byte [] in = new byte[100];
servletConnection.getInputStream().read(in);
servletConnection.getInputStream().close();

Calling Servlet clicking on applet

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