Applet to JSP and JSP to C++

I am looking for some information and sample code for
(1)Java Applets to JSP connection
(2)JSP to server-side functions written in C++
Thanks in advance.

I am looking for some information and sample code for
(1)Java Applets to JSP connection
Look out for it [url http://www.unix.org.ua/orelly/java-ent/servlet/ch10_02.htm]here
It shows applet-servlet communication. By making minor changes to it, you can setup applet - jsp communication as well.
(2)JSP to server-side functions written in C++Refer to the previous post.
All the best.

Similar Messages

How to import and display an applet from JSP

i m using netbeans 5.0
i have class named myapplet.class
and jsp named myjsp.jsp
now i want to access(import) this myapplet.class from jsp
also i want to display this applet from this jsp
i am able to do either thing but not both
so please help me it is so urgent and important for me bcoz
i have to complete my project as early as possible
Thanks in advance

my jsp source file page path is D:\Reliance
project\WebApplication3\web\
and classes path is D:\Reliance
project\WebApplication3\build\web\WEB-INF\classes\
so problem is that if i want to use myapplet.class
then i have to put my class in D:\Reliance
project\WebApplication3\build\web\WEB-INF\classes\
location
but at that time i am not able to display this applet
on my jsp
if i put my myapplet.class in
D:\Reliance project\WebApplication3\web\ then i m
able to display
applet but not able to access(import) this class
hope you will got the problem!!!
thanks for your reply !!!try to set the path of your applet on jsp something like this
"WEB-INF/classes/myclass.class"

Advantages and Disadvantages of Applet over JSP/servlet

Can some one please let me know what are the major advantages and disadvantages of using Applets over JSP/Servlet technology?

Well, a servlet / jsp is generated on the server, an applet on the client side. That's the most important difference.
Appelt's usually are for little applications like games and stuff, you can run in a browser.
Servlets are for dynamic pages, for example database-viewing and stuf...

How can I pass a variable to an applet in JSP?

I want to invoke an Applet in JSP and pass a variable( ie. port) to the Applet. I do as follows:
<applet code="best.Applet1.class" width=400 height=300 >
<param name=port1 value=port>
</applet>
in Applet1.java , I use getParameter("port1"),yet I got character string "port" ,not the value of port(i.e. 100).
How can I get 100 not "port"? Thanks!!!

Assuming that port is a variable defined and initailized in the jsp:
<applet code="best.Applet1.class" width=400 height=300 >
<param name=port1 value=<%= port %>>
</applet>

Re: Including Applet in JSP with Dynamic input| Help needed

Hi All,
We are into a project in Oracle Portal Server where in we want to embed a result of a standalone application in Portal page.
We can do that once we can embed the result of the standalone application which generates applet based on the input it gets from the current application's database.
If it was static we could have used jsp:plugin but, it fails in our case!
We are clueless as to how to embed an applet which will pick up the data dynamically.
Can anyone of you help me in this regard?
Thanks & Regards
Arthi

Hi Arthi,
I think this might help you to get an idea why jsp:plugin tag does not allow for dynamically called applets.
<jsp:plugin type=applet height="100%" width="100%"
archive="myjarfile.jar,myotherjar.jar"
codebase="/applets"
code="com.foo.MyApplet" >
<jsp:params>
<jsp:param name="enableDebug" value="true" />
</jsp:params>
<jsp:fallback>
Your browser does not support applets.
</jsp:fallback>
</jsp:plugin>
The plugin example illustrates a <html> uniform way of embedding applets in a web page. Before the advent of the <OBJECT> tag, there was no common way of embedding applets. This tag is poorly designed and hopefully future specs will allow for dynamic attributes (height="${param.height}", code="${chart}", etc) and dynamic parameters. Currently, the jsp:plugin tag does not allow for dynamically called applets. For example, if you have a charting applet that requires the data points to be passed in as parameters, you can't use jsp:params unless the number of data points are constant. You can't, for example, loop through a ResultSet to create the jsp:param tags. You have to hand code each jsp:param tag. Each of those jsp:param tags however can have a dynamic name and a dynamic value.
I think you can get better information if you look in to the below link
http://pdf.coreservlets.com/CSAJSP-Chapter12.pdf
Many Thanks,
Ramesh.

Applet in JSP page

Hello! I wrote an applet and try to put in jsp page in JDeveloper:
<jsp:plugin type="applet" code="CompositeTest.class"
width="400" height="400">
<jsp:fallback>
<p>Unable to load applet</p>
</jsp:fallback>
</jsp:plugin>
and I copy the class file to folder where the JSP page is located. When I start Jsp page I have a message: "Applet not found"
What I do wrong??? PLZ Help!
BEST REGARDS

Hi,
I am not sure the JSP file, which resides in the public_html directory, is part of the class path of the running application. If you open the project properties, you can see where JDeveloper looks for Java classes. Try and extend this setting to include the public_hml directory (you can also try and just add the source as a library path (see library section))
Frank

Calling applet in jsp file

Hi al,
When we try to invoke an applet from jsp, applet class is not able to initialize (not able to load the class)
Exception got in java console as follows :
Load: class SignedAppletDemo.class not found.
java.lang.ClassNotFoundException: SignedAppletDemo.class
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 10 more
We are using <jsp:plugin> tag for access applet from jsp in Oracle Appserver.(OC4J).
If anyone have any idea on the above,please let us know. Please pass on steps to follow for access applet from jsp file.
Thanks,
Rajkumar

Review
URL.openConnection()
and HttpURLConnection

Applets in Jsp generates ClassNotFoundException

hi there,
I face a problem of calling applets in Jsp.
The code to call applet is:
<jsp:plugin type="applet"
code="core.TextApplet"
width="475" height="350">
</jsp:plugin>
And I have a 'core' directory in source packages and TextApplet.java in core directory.Wehn I run the TextAppletJSP ,it gives me an error message in applet display area:
Exception:java.lang.ClassNotFoundException:core.TextApplet
Anyone who help me for this problem plz.
thanks for your help.
gezahegn

I am also getting out of memory errors, and Tomcat keeps increasing in memory on every page refresh. Please let me know if you get this resolved how you did it. Thanks.

Unable to load Applet in JSP using Tomcat 5.5.12

Hi
I am aunable to applet in jsp using Tomcat 5.5.12 and JRE 1.5. Below is the code that I am using
                                   <applet
                                   codebase = "."
                                   archive = "WebPOSApplet.jar"
                                   code = "webposprint.WPMainApplet.class"
                                   name = "Trans Applet"
                                   width = "450"
                                   height = "115"
                                   hspace = "0"
                                   vspace = "0"
                                   align = "middle"
                                   >
<param name = "redirectInfo" value = "SearchProducts.do">
                                   </applet>
<%/*%>
<OBJECT
                                   classid = "clsid:CAFEEFAC-0014-0002-0000-ABCDEFFEDCBA"
                                   codebase = "http://java.sun.com/products/plugin/autodl/jinstall-1_4_2-windows-i586.cab#Version=1,4,2,0"
                                   WIDTH = 450 HEIGHT = 115 >
<PARAM NAME = CODE VALUE = webposprint.WPMainApplet.class>
<PARAM NAME = archive VALUE = WebPOSApplet.jar>
<PARAM NAME = "type" VALUE = "application/x-java-applet;jpi-version=1.4.2">
<param name = "redirectInfo" value = "SearchProducts.do">
<PARAM NAME = "scriptable" VALUE = "false">
<PARAM NAME = model VALUE=models/buckminsterfullerine.xyz>
<embed width="450" height="115" code="webposprint.WPMainApplet.class" archive="WebPOSApplet.jar" type="application/x-java-applet;jpi-version=1.4.2" redirectinfo="SearchProducts.do" scriptable="false" model="models/buckminsterfullerine.xyz" src="webposprint.WPMainApplet.class">
</embed> <COMMENT> <EMBED
                                   type = "application/x-java-applet;jpi-version=1.4.2" \
                                   CODE = webposprint.WPMainApplet.class\
                                             archive = WebPOSApplet.jar\
                                   WIDTH = 373 \
                                   HEIGHT = 167 \
                                   model =models/buckminsterfullerine.xyz \
                                        scriptable = false \
                                        pluginspage = "http://java.sun.com/products/plugin/index.html#download"> <NOEMBED>
alt="Your browser understands the <APPLET>
tag but isn't running the applet, for some reason."
Your browser is completely ignoring the <APPLET>
tag! </NOEMBED> </EMBED> </COMMENT>
</OBJECT>
<%*/%>
This code doesn't seems working with Tomcat 5.5.12. I works fine with Tomcat 4.1.31
Please help
Thanks

Applets run client side - which means the relevant class files need to be downloaded to the client.
Anything under the WEB-INF directory is not directly accessible by the client. Nothing under WEB-INF can be downloaded.
ergo, specifying the WEB-INF directory as part of your applet codebase is a bad idea.
I would suggest try copying the applet classes from under WEB-INF to some other place in your application.
Also, you should probably specify the full class name of your Applet in the plugin tag.
<%@ page import="com.util.MyApplet" %>
<jsp:plugin type="applet" code="com.util.MyApplet" codebase="/classes" width="250" height="100" jreversion="1.6">
     <jsp:fallback>
          <B>Unable to start plugin!</B>
     </jsp:fallback>
</jsp:plugin>cheers,
evnafets

Applets in JSP --- I'm going crazy!

I am using an applet I have written on a JSP page which I have also written.
Using: Win2K, IE6, J2SDK 1.4, Tomcat 4.0.3
I have several problems. Even if you can answer only one of them, it will be a great help!
Here is how I'm adding the applet.
<jsp:plugin type="applet" code="RawData.class" name="rawData" jreversion="1.4" width="700" height="55" >
<jsp:fallback>
Plugin tag OBJECT or EMBED not supported by browser.
</jsp:fallback>
</jsp:plugin>
</TD>
Problem 1) I can only get the applet loaded if the applet class file is in the same folder as the JSP file. Anything else, and I get a ClassNotFoundException.
Can't get the CODEBASE to do anything for me at all.
I set my codebase="/RawData/classes", but makes no difference.
I then tried Jarring my applet and placing RawData.jar in the same folder with the JSP. But also no go. I then set codebase="RawData.jar", but guess what... Nothing.
So my questions are: How do I get the applet to load from the applet.class files using codebase if the applet files are in a sub folder? And how do I get my applet to load from a Jar?
Problem 2) Once this applet is loaded, I have the biggest nightmare imaginable to get the browser to load a new version after I have updated it. And trust me, there is not and old version of the applet.class in my ClassPath. In fact there is not another copy of the applet.class file anywhere on my PC. I made sure. I have also disabled the Java Plugin Cache option, and deleted my temporary internet files with Explorer. But the thing persists in loading the old version from somewhere. What the heck do I do? I fear this is driving me insane.. :)
Problem 3) I need the HTML components to interact with the applet.
When I do a call to an applet function passing no parameters it works fine, and I get the value back, like this:
<SCRIPT LANGUAGE="VBScript">

</SCRIPT>
But when I do a function call, passing parameters, the scrip just stops working altogether, like this.
<SCRIPT LANGUAGE="VBScript">

</SCRIPT>
Why is this. What am I doing wrong.
And better yet... Is there a way of manipulating the HTML components from within JSP scriplet <% ... %>?
Please if anyone can help... It will be greatly appreciated. I am at a loss!
Thanx. Quigrim

Quigrim wrote:
Problem 1) I can only get the applet loaded if the applet class file
is in the same folder as the JSP file. Anything else, and I get a
ClassNotFoundException. Can't get the CODEBASE to do anything for me
at all.Set CODEBASE to point to the relative directory where your code is. If it is in the same directory as the JSP then CODEBASE="."; if it is in a sub-directory 'classes' then CODEBASE="classes".
Problem 2) Once this applet is loaded, I have the biggest nightmare
imaginable to get the browser to load a new version after I have
updated it. Close ALL browser windows - you have to force the plugin JVM to re-initialise - I've not found any other way to do it.
Hope these help you.
Phil.

Process Monitor Diagram Applet in JSP

Has anyone experienced to use Java Applet in JSP to display the process diagram, just as what you can see in the workflow console. I notice that WF_MONITOR has a getMonitorURL() API which returns a link that leads to Workflow Console, I feel this isn't user friendly. If I could bring what user exactly sees the process diagram in workflow console to Java JSP, it would be superb ...........
any idea?
Kun

All I can think of is that you are using swing and
including the necessary files via import statements in
the code. This might cause the applet to run fine with
the default Netscape JVM. On the other hand, when
using the jsp:plugin tag the browser is instructed to
download the Java2 plugin regardless of whether the
applet will run or not. What I'm saying is that you
probably don't have the Java2 plugin installed on your
browser rather you have the necessary jar files in
your classpath to support Java2. Does that make any
sense?>
CliffI don't have a shell CLASSPATH variable, and I'm not sure how to tell what CLASSPATH variable Netscape is using.
The applet doesn't use Swing as far as I can tell, the code for this applet is at
http://tmap.pmel.noaa.gov/~callahan/JAVA/map_v3.0/LiveMap_30.java.
It appears to use only awt for imaging, which I think is considered Java1.
A bit off topic:
I have the javaplugin.so which ships with jdk1.3.1_01. However when I look under Edit->Preferences->Navigator->Applications and try to set the plugin used for application/x-java-applet I see that the setting is one for "Unknown - prompt user". Also if I look under Edit->Preferences->Advanced I can see that "Enable Java" is checked and activated but "Enable Java Plugin" is not checked and unavailable (it is greyed-out).
1) How can I get Netscape to "know about" the plugin I have available in my JRE ?
2) How can I tell Netscape to use this plugin for all things Java ?
3) How is it that the applet runs fine when included in a HTML page, even though it appears that my browser's application settings aren't set up to handle applets correctly ?
4) The Netscape Edit->Preferences->Advanced shows that Java is enabled but the plugin is not. I guess I'm missing something here as I thought that the Java plugin was required for anything Java related to run (such as applets) but this is obviously not so since the applet will run fine if coming from the HTML page.
A bit perplexed...
-James

Including applets in JSP - problem!!

I'll begin by admitting that I am fairly new to JSP. That said, I am experiencing a ClassNotFoundException when trying to include an applet in a JSP under certain conditions. Here's the detail:
I'm using Tomcat 4.0.4 and am working in the default ROOT webapp directory. This is running on Win2k Pro on port 8080. I HAVE managed to get the applet to load under the following circumstances:
- JSP page in ROOT/jsp directory
- applet class file (and supporting classes) ALSO in ROOT/jsp directory
That's just great... but I want to be able to place the applet class file and supporting classes with all of the other class files in ROOT/WEB-INF/classes. Here's the scenario that fails time and time again:
- JSP page in ROOT/jsp directory
- applet class file (and supporting classes) in ROOT/WEB-INF/classes
- in this scenario I have added a 'codebase' attribute to the applet tag (please be aware that I have tried this with both the APPLET tag and the jsp:plugin tag, each method yielding identical results)
- I have tried several different codebase values, all listed below:
codebase="../WEB-INF/classes/"
codebase="http://localhost:8080/servlet/"
codebase="http://localhost:8080/WEB-INF/classes/"
codebase="."
and I have tried it w/o a codebase at all
None of these help the JSP to find the applet class file. I've really thrown my hands up in the air with this. I realize that every 3rd or 4th thread is typically a beginner with some Class not found error... but I've put my time in on this one, and I cannot figure it out. Thanks.

Hi, Ben
You bring up a very good issue that a lot of these books about JSPs and Servlets usually forget to mention.
I dont know what sort of Web Servlet Container you are using, but I know that in Tomcat there is a 'lib' and and 'classes' directory, so if you want to have classes that are used by different applications from different directories then you can place them there. If you want you can compile all these classes into a jar and put that jar either in the 'TOMCAT_HOME/lib' or 'TOMCAT_HOME/common/lib' directories or you can simply put all the .class files into either the 'TOMCAT_HOME/classes' or 'TOMCAT_HOME/common/classes' directories. This way your classes will be known to any applications running on your webserver.
If, however, you want supporting classes to be only used by servlets or jsps, then you should put them in the web-inf directory.
Let me know if this works,
Val.

How to run the applet in JSP

hi,
im trying to run an applet from JSP i am not able to see the output of the applet on the JSP page?
<APPLET CODE="com.metro.supex.admin.SampleApplet.class" HEIGHT="25" WIDTH="125" ALIGN="bottom"></APPLET>
this line of code is included in JSP to run the applet, it is giving error
java.lang.ClassNotFoundException:com.metro.supex.admin SampleApplet
please can you help me in this matter.

And don't use the applet tag, use object embed.
use the htmlconverter in the jdk bin dir to convert an applet tag.

Re: Embedding Applet in JSP which gets dynamic input| Pls help

Hi All,
We are into a project in Oracle Portal Server where in we want to embed a result of a standalone application(Which is applet) in JSP.
This standalone application generates applet based on the input it gets from the current application's database.
If it was static we could have used jsp:plugin but, it fails in our case!
We are clueless as to how to embed an applet which will pick up the data dynamically.
Can anyone of you help me in this regard?
Thanks & Regards
Arthi

Well instead of generating entire applet ,you can have a generic applet which takes parameters as ( <PARAM name="name" value="value"> ) inputs and process those inputs to generate output.
In this case the output of the stand alone program would be a object. And in JSP page you need to access this object, then you can get the values which need to be passed to Applet.
Else
1.Identify the real path of the applet class file
ServletContext context = session.getServletContext();
String realContextPath = context.getRealPath(request.getContextPath());2.Copy the file to a standard location in your web application
Regards,
-John-

How to embedd applet into JSP

Hi,
In my application I need to get the windows userId and credential data's in applet. That applet should be embedded into JSP. How I can do that? Can anyone help me on this please.....?
Thanks in advance...

JSP Plugin Syntax
<jsp:plugin
type="bean | applet"
code="classFileName"
codebase="classFileDirectoryName"
[ name="instanceName" ]
[ archive="URIToArchive, ..." ]
[ align="bottom | top | middle | left | right" ]
[ height="displayPixels" ]
[ width="displayPixels" ]
[ hspace="leftRightPixels" ]
[ vspace="topBottomPixels" ]
[ jreversion="JREVersionNumber | 1.1" ]
[ nspluginurl="URLToPlugin" ]
[ iepluginurl="URLToPlugin" ] >
[ <jsp:params>
[ <jsp:param name="parameterName" value="{parameterValue | <%= expression %>}" /> ]+
</jsp:params> ]
[ <jsp:fallback> text message for user </jsp:fallback> ]
</jsp:plugin>
*Examples*
<jsp:plugin type=applet code="Molecule.class" codebase="/html">
<jsp:params>
<jsp:param name="molecule" value="molecules/benzene.mol" />
</jsp:params>
<jsp:fallback>
<p>Unable to load applet</p>
</jsp:fallback>
</jsp:plugin>

Applet to JSP and JSP to C++

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