not able to communicate to servlet

[Nidhi Nagre]

hello there..

i m new in java so please dont ignore this post its very urgent,i didn't find and relevant post before even though after looked around the recent ones.

i want to communicate an applet embedded into a jsp(say myjsp) to a servlet(say myservlet) those are in diffrent directories.
myservlet itself running with uri http://localhost:8084/UASProject/myservlet.java and this file located in /UASProject/src/java/ directory.

myjsp itself running with uri http://localhost:8084/UASProject/myjsp.jsp and this file located in /UASProject/web/ directory.

and i am using the follwing code inside

netBeans 5.5.1

 
           try{        
        URL appletURL = getCodeBase();
        System.out.println(std_details.getProperty("student_name"));
        String strHost = appletURL.getHost();
        String strPort = String.valueOf(appletURL.getPort());
        String strProtocol = appletURL.getProtocol();
        int portNumber = Integer.parseInt(strPort);
        String strwp ="/UASProject/RegistrationData";        
        URL servletURL = new URL(strProtocol,strHost,portNumber,strwp);  
       
        URLConnection servletCon = servletURL.openConnection();        
        
        servletCon.setUseCaches(false);
        servletCon.setDoOutput(true);
        servletCon.setDoInput(true);       
        
        OutputStream outstream= servletCon.getOutputStream();  
       
        ObjectOutputStream oboutStream = new ObjectOutputStream(outstream);              
        
        oboutStream.writeObject(std_details);          
        oboutStream.flush();         
       // oboutStream.close();         
        URL tempURL = new URL(String.valueOf(servletURL));        
        getAppletContext().showDocument(tempURL,"_self");    
 
}catch(Exception e)  
       {System.out.println(e+" "+e.getCause());}
 

after running this code i found following error in IE7.0 window

HTTP Status 404 - /UASProject/RegistrationData.java


--------------------------------------------------------------------------------

type Status report

message /UASProject/RegistrationData.java

description The requested resource (/UASProject/RegistrationData.java) is not available.



--------------------------------------------------------------------------------

Apache Tomcat/5.5.17

[Ulf Dittmer]

I'm not sure what this line is supposed to accomplish:

URL tempURL = new URL(String.valueOf(servletURL));

Should the JSP be replaced by exactly the same URL that the applet had earlier accessed?

You could try using hardcoded URLs instead, like new URL("http://localhost:8084/UASProject/myservlet") to see if that makes a difference, or print the value of the URLs the applet is trying to access using System.out.

Also, please read this: EaseUp
[ November 09, 2007: Message edited by: Ulf Dittmer ]

[Nidhi Nagre]

thanks Mr Ulf

sorry to describe the wrong uri jsp's accessed with.

the correct one is http://localhost:8084/UASProject/faces/myjsp.jsp
the remaining datas are same.


as you said, i tried on that way also

i used hardcoded url like new URL("http://localhost:8084/UASProject/myservlet") but coudn't got success. right now i am getting the same error.

one more thing, when i tried to run an another jsp(say another) instead of servlet in the same way then it was working fine. why it creating problem with servlet?

[Nidhi Nagre]

actually i was making mistake at the time when i was using Protperties(which dosen't implements Serializable interface ) object.but now i m using Hashtable class to structure all data and writing object of this class to ObjectOutput stram.

but one more thing i cant understand,

there is not any effect of this line of code


getAppletContext().showDocument(servletURL,"_self");



however when i tried to run an another jsp page using its uri then it was running in the browser, then why servlet doesn't??
why am i prompt to download the servlet file instead??

[Abhinav Srivastava]

http://localhost:8084/UASProject/myservlet.java 

Are you trying to access a Java Source file here?

[Nidhi Nagre]

abhinav wrote:

http://localhost:8084/UASProject/myservlet.java
Are you trying to access a Java Source file here?

actually java servlet source file is located at /UASProject/src/java/

and i am deploying it with with uri above.

[Ben Souther]

At this point, I suggest that you step back a bit from this project and grab a good book or find a web tutorial on servlet (and, better, Java) development.

Java is not a scripting language.
Before a Java program can run, it needs to be compiled into a bytecode byte code file with a '.class' extension.

Trying to step past the beginner stuff will usually result in a lot of headaches and make it take a lot longer for you to become a proficient servlet developer.