Redirecting to ASP from Servlet

How to redirect the data from a servlet to ASP. Right now my servlet is displaying data in a JSP but i need that to be displayed on ASP.
Any Ideas?

Dunno. Do you have a server that supports ASP? Generally, I would think you would need to do a response.sendRedirect("thepag.asp?param=value"); to get to the asp page. But if you have a server that handles both servlets and ASP then you may be able to do something different. Plugins or what not you will have to research for your particular setup. I just assumed you had an ASP server and a Servlet server (wether the same or not...)

Similar Messages

How can I call an ".asp" from a Servlet?

I want to make a call to an asp page from my servlet. If i use the conventional way of doing it as follows:
RequestDispatcher rd = getServletContext().getRequestDispatcher("http://localhost:8080/abc.asp");
rd.forward(request, response)
It gives me IllegalArgumentException saying that the "Path must be absolute". And if i give the relative path like
RequestDispatcher rd = getServletContext().getRequestDispatcher("/abc.asp");
rd.forward(request, response)
In this case it takes me to the asp page, but gives some ClassNotFoundException - images.
I do not understand what class it is looking for and where to get that?
So Why am i not able to call an ASP from Servlet, Any clue??

What are you trying to accomplish? A redirect is one of the only ways to successfully go from a Servlet to an ASP. For example:response.sendRedirect("http://server:9090/abc.asp?name=value");This is mainly because when you forward, your actually sending the request and response objects under the current servlet context to be processed by another JSP/servlet in the same (sometimes cross) context.
When interacting with ASP's your actually communicating between web containers (one which is Java based the other VB based).
When you use:RequestDispatcher rd = getServletContext().getRequestDispatcher("http://localhost:8080/abc.asp");
rd.forward(request, response) Your telling the servlet to send it's contents outside the web container where they cannot exist as such (even though you are pointing to your own JSP server, it's the "http://" that makes it assume your trying to get out).
Using: RequestDispatcher rd = getServletContext().getRequestDispatcher("/abc.asp");
rd.forward(request, response) is fine but what is processing your asp in your Java Web Server?
The best way to mix JSP/Servlets with ASP (in my opinion others may debate it if they please) is using messaging like XML. Trying to share sessions between ASP and Java is quite messy and to much effort for a 1 to 1 communication option.
Back to an earlier question, what is processing your asp files in the Java web server? If you have something processing them (like ChilliSoft) then check the docs to see if it supports session sharing between JSP/Servlet - ASP.
Anthony

Urgent....How can i redirect to my jsp page from servlet in init() method..

How can i redirect to my jsp page from servlet in init() method..Becoz that servlet is calling while server startsup..so im writing some piece of code in init() method..after that i want to redirect to some jsp page ...is it possible?
using RequestDispatcher..its not possible..becoz
RequestDispatcher rd = sc.getRequestDispatcher("goto.jsp");
rd.foward(req,res);
Here the request and response are null objects..
So mi question can frame as how can i get request/response in servlet's init method()..

Hi guys
did any one get a solution for this issue. calling a jsp in the startup of the servlet, i mean in the startup servlet. I do have a same req like i need to call a JSP which does some data reterival and calculations and i am putting the results in the cache. so in the jsp there in no output of HTML. when i use the URLConnection i am getting a error as below.
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:707)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:612)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:705)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:612)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLCon
nection.java:519)
at com.toysrus.fns.alphablox.Startup.callJSP(Unknown Source)
at com.toysrus.fns.alphablox.Startup.init(Unknown Source)
at org.apache.tomcat.core.ServletWrapper.doInit(ServletWrapper.java:317)
so plz do let me know how to call a jsp in the start up of a servlet.
Thanks
Vidya

Problem while redirecting from servlet to wml page

Hello everybody
I am developing a WAP site but I am a begnner in wml and servlet. So I need some help from you ppl.
I have made a wml page whch redirects to a Login servlet now from that LoginServlet I want to gain redirect to a wml page. I have written the following code so that when the user clicks on Login he is redirected to emailreaderwap/Login.wml page
PrintWriter out = response.getWriter();
String url="/emailreaderswap/login.wml";
response.addHeader("Content-Location:", Double.toStringMath.random()));
response.setContentType("text/vnd.wap.wml");
out.println("<?xml version=\"1.0\" encoding=\"utf-8\"?> ");
out.println("<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.3//EN\" ");
out.println("\"http://www.wapforum.org/DTD/wml13.dtd\"> ");
out.println("<wml>");
out.println("<card>");
out.println("<p>"+ "Email Address or Password are wrong Please Try Again!\r\nClick On The Link Below to go back to Login Page"+
                            "<a href=\""+url+"\">Login</a>");
out.println("</p>"+"</card>"+"</wml>");But when I run this in my Nokia Mobile Browser4.0 I get "malformed output" as output whereas I want to see the /emailreaderwap/Login.wml page as the output.
Please tell me whether this is the right way to go abt it or is there any other way i can accomplish my task.
I hope you ppl reply as soon as possible as I have a deadlne to meet.
Eagerly waiting for your reply.
Thankyou
Heti Shah

hi ,
u forgot to give the slash ("/") before jsp file when u r creating the RequestDispatcher object. I tried the following example. Its working fine.
check this code:
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.GenericServlet;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
* @author sivakumar
public class TestServlet extends GenericServlet {
      public void service(ServletRequest request,ServletResponse response)throws ServletException,IOException{
               PrintWriter out=response.getWriter();
               response.setContentType("text/html");
               out.println("Hi this is first servlet");
               RequestDispatcher requestDispatcher=getServletContext().getRequestDispatcher("/test.jsp");
               requestDispatcher.forward(request,response);
}test.jsp shows images also.
try it...
good luck...

Error message from servlet to jsp

Hi again,
I have servlet and check error on this servlet then i would like
to send error message to jsp page.Every error message will send to
same JSP page.So JSP must receive message from Servlet.Can i do this?
Please give me details and some sourcecode.I will appreciate for your helps.

you could do something like this..
request.setAttribute("error", stringErrormessage);
Then in the jsp just do
<%= request.getAttribute("error") %>
That will print an errormessage.
Basically, by setting anything on the request and then redirecting to that page you cn display it...
//Johan

Best practice from passing messages from servlets

Is there a best practice for passing user messages (typically errors) back to the page from servlets?
e.g. http://localhost:4502/content/geometrixx/en.html?message=Some user error message
Dan

Well I suppose that answer to that question depends somewhat on your requirements, but I would say using a query string as you have indicated would be less than ideal because the page with the message would not be cached. No depending on your requirements and what sort of message you are passing that might be OK - especially if you message is highly personalized.
If however you have a limited number of standard messages to display a more common approach is to have each message have it's own page and then to configure the servlet to redirect to the appropriate page based on the desired message.
If you want the user to end up on the same page they submitted to the servlet from then another common approach would be to have the post to the servlet be AJAX and then display the message client side without having to change the URL.

Pass data from servlet to jsp using sendRedirect

Hi,
I am passing data from servlet to jsp using forward method of request dispatcher but as it doesn't change the url it is creating problems. When ever user refreshes the screen(browser refresh) it's re-loading both servlet and jsp, which i don't want to happen. I want only the jsp to be reloaded.
Can I pass data from servlet to jsp using sendRedirect in this case. I also want to pass some values from servlet to jsp but without using query string. I want to set some attributes and send to jsp just like we do for forward method of request dispatcher.
Is there any way i can send data using attributes(without using query string) using sendRedirect? Please let me know

sendRedirect is meant as a true redirect. meaning
you can use it to redirect to urls not in your
context....with forward you couldn't pass information
to jsps/servlets outside your own context.Actually, you can:
getServletContext().getContext("/other").getRequestDispatcher("/path/to/servlet").forward(request, response)I think the issue here is that the OP would like to have RequestDispatcher.forward() also update the address in the client's browser. That's not possible, AFAIK. By the time the request is forwarded, the browser has already determined the URL of the servlet, and the only I know of way to have the browser change the URL to the forwarded Servlet/JSP is to send a Location: header (i.e. sendRedirect()). Remember that server-side dispatching is transparent to the client. Maybe there's some tricky stuff you can do with JavaScript to change the address in the address bar without reloading the page?
Brian

How to define target window when redirecting within frames using servlet?

Howdy:
Is there a way to define target window when redirecting within frames using servlets?
How to do it in JSP as well?
T.I.A.
Oriental Spirit

Your servlet (or JSP) can't decide where it is going to be displayed. The browser has already decided that when it makes the request to your servlet.

How can I display the HTML page from servlet which is called by an applet

How can I display the HTML page from servlet which is called by an
applet using the doPost method. If I print the response i can able to see the html document. How I can display it in the browser.
I am calling my struts action class from the applet. I want to show the response in the same browser.
Code samples will be appreciated.

hi
I got one way for this .
call a javascript in showDocument() to submit the form

Getting the values from Servlet

Hi EveryOne,
I have done one thing using Flex,i have send the parmeters
from flex to servlet using HttpService and in the servlet i
captured them and used them.Now what i want is i have to capture
the values from servlet to flex .
Response content in servlet is set to text/xml,any one please
give me the idea how to do thsi or please send me some code to do
this.
{Sorry for my English} Thanks,
Namala.

Hi,
You have to handle the result event of the HTTPService
component. In the result handler you will have access to the
ResultEvent object which will contain the response from the server
in the "result" property. Please visit the URL below for more
details on how to handle result from the server.
http://livedocs.adobe.com/flex/3/html/data_access_6.html#235586
Hope this helps.

Getting error while calling ejb business methods from servlet

Hi
Iam getting error when i try to call a ejb method from servlet.Error is
"com.netscape.server.eb.UncheckedException: unchecked exception nested exception is:java.lang.NullPointerException".
I build the application and deployed it successfully.Iam using IAS 6.O with windows NT 4.0.
This is just a method which takes values from database and return as an array of bean to servlet.
Any help on this.Thanks Shank

Hi
I was using the session bean.Your suggestion helped me a lot.Perfect.
I debug my program and found that from ejbCreate()exception is getting.
I was getting the datasource object thro ejb create() initialisation.
Somehow the look up jndi which i mentioned was not interpretting from ejb-jar.xml ias-ejb-jar.xml and datasource ref .Due to this iam getting jndi Namenotfound exception which in turns to null pointer as datasource is getting null.
when i hardcoded in the ejb the the jndi name for datasource it is working fine.Bit worried all the existing ejbs working with the xml referenced datasource and jndi,but when i added a new ejb with same properties it is failing to get the jndi name.
Piece of code from ias-ejb-jar.xml
<resource-ref>
          <res-ref-name>myDataSource</res-ref-name>
          <jndi-name>jdbc/nb/myData</jndi-name>
</resource-ref>
Piece of code from ejb-jar.xml
<resource-ref>
          <res-ref-name>myDataSource</res-ref-name>
          <res-type>javax.sql.DataSource</res-type>
          <res-auth>Container</res-auth>
</resource-ref>
Thanks a lot meka

Not able to access the native c code from servlet

I want to call c function from servlet using JNI . I created the .so file and gave the library path . But when i try to load the library it says "Unsatisfied link error ". I am using tomcat on linux .. any more setting has to be done in order to call native code from servlets ?

You need to post a little bit of code. What does your LoadLibrary() call look like?

Problem to connect to mysql from servlet using a javabean

Hi,
I'm new here and beginner on java to.
I have problem to connect to MySql database, by a connection javabean.
It's the following: a HTML page calls a servlet and this servlet imports the package connection javabean.
It has no problem when I establish the connection inside the servlet, with all its methods (public and private). But i want to separate the code connection from servlet.
Detail: there is no problem, using the javabean to connect to MS Access database.
I put "mysql-connector-java-3.1.12-bin.jar" file inside WEB-INF/lib application and common/lib directories.
I set the classpath:
SET CLASSPATH=%CATALINA_HOME%\COMMON\LIB\mysql-connector-java-3.1.12-bin.jar;%CLASSPATH%
I think that the servlet cannot create an instance of javabean, because passed by catch exception of the servlet init method.
But I don't know why.
Please Why?
Below there are the fragment of errors, servlet code e javabean code.
Thank you.
Zovao.
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
java.lang.NullPointerException
at CadServletFileBeanConexArq.doPost(CadServletFileBeanConexArq.java:47)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
Note: The line 47 is calling insertIntoDB javabean method.
========///////////////===============
// Here is the servlet CadServletFileBeanConexArq.java
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.sql.*;
import conJdbc.*;
public class CadServletFileBeanConexArq extends HttpServlet {
public ConexPed connect = null;
private String driver = "com.mysql.jdbc.Driver";
private String URL = "jdbc:mysql://localhost:3306/cadastro";
public void init( ServletConfig config )
throws ServletException
super.init( config );
try
connect = new ConexPed(driver, URL, "monty", "some_pass");
catch ( Exception e )
e.printStackTrace();
connect = null;
public void doPost( HttpServletRequest req,
HttpServletResponse res )
throws ServletException
boolean success = true;
String email, nome, sobrenome, produto, valor;
email = req.getParameter( "Email" );
nome = req.getParameter( "Nome" );
sobrenome = req.getParameter( "Sobrenome" );
produto = req.getParameter( "Produto" );
valor = req.getParameter( "Valor" );
res.setContentType( "text/html" );
if ( email.length() > 0 && nome.length() > 0 && sobrenome.length() > 0 && valor.length() > 0 )
/* inserting data */
success = connect.insertIntoDB(
"'" + email + "','" + nome + "','" + sobrenome + "','" + produto + "'", Double.parseDouble(valor) );
//closing connection
public void destroy()
connect.fecharConexao();
=============///////////////============
Here is the JavaBean.
package conJdbc;
import java.sql.*;
public class ConexPed
public Connection connection;
public Statement statement;
public ConexPed (String driver, String urlServidor, String user, String password)
try
Class.forName(driver);
connection = DriverManager.getConnection(urlServidor,user,password);
catch (ClassNotFoundException ex)
System.out.println("N�o foi poss�vel encontrar a classe do Driver: " + driver);
catch (SQLException ex)
System.out.println("N�o foi poss�vel conectar ao servidor");
try
statement = connection.createStatement();
catch (SQLException ex)
System.out.println("N�o foi poss�vel criar a statement");
*Inserting data to database
public synchronized boolean insertIntoDB( String stringtoinsert, double valor)
try
statement.executeUpdate( "INSERT INTO pedido values (" + stringtoinsert + " , " + valor + ");" );
catch ( Exception e ) {
System.err.println(
"ERROR: Problemas ao adicionar nova entrada" );
e.printStackTrace();
return false;
return true;
* Close statement.
public void fecharStatement()
try
statement.close();
catch (SQLException ex)
ex.printStackTrace();
* close database
public void fecharConexao()
try
connection.close();
catch (SQLException ex)
ex.printStackTrace();
}

Hi,
I'm new here and beginner on java to.
I have problem to connect to MySql database, by a connection javabean.
It's the following: a HTML page calls a servlet and this servlet imports the package connection javabean.
It has no problem when I establish the connection inside the servlet, with all its methods (public and private). But i want to separate the code connection from servlet.
Detail: there is no problem, using the javabean to connect to MS Access database.
I put "mysql-connector-java-3.1.12-bin.jar" file inside WEB-INF/lib application and common/lib directories.
I set the classpath:
SET CLASSPATH=%CATALINA_HOME%\COMMON\LIB\mysql-connector-java-3.1.12-bin.jar;%CLASSPATH%
I think that the servlet cannot create an instance of javabean, because passed by catch exception of the servlet init method.
But I don't know why.
Please Why?
Below there are the fragment of errors, servlet code e javabean code.
Thank you.
Zovao.
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
java.lang.NullPointerException
at CadServletFileBeanConexArq.doPost(CadServletFileBeanConexArq.java:47)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
Note: The line 47 is calling insertIntoDB javabean method.
========///////////////===============
// Here is the servlet CadServletFileBeanConexArq.java
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.sql.*;
import conJdbc.*;
public class CadServletFileBeanConexArq extends HttpServlet {
public ConexPed connect = null;
private String driver = "com.mysql.jdbc.Driver";
private String URL = "jdbc:mysql://localhost:3306/cadastro";
public void init( ServletConfig config )
throws ServletException
super.init( config );
try
connect = new ConexPed(driver, URL, "monty", "some_pass");
catch ( Exception e )
e.printStackTrace();
connect = null;
public void doPost( HttpServletRequest req,
HttpServletResponse res )
throws ServletException
boolean success = true;
String email, nome, sobrenome, produto, valor;
email = req.getParameter( "Email" );
nome = req.getParameter( "Nome" );
sobrenome = req.getParameter( "Sobrenome" );
produto = req.getParameter( "Produto" );
valor = req.getParameter( "Valor" );
res.setContentType( "text/html" );
if ( email.length() > 0 && nome.length() > 0 && sobrenome.length() > 0 && valor.length() > 0 )
/* inserting data */
success = connect.insertIntoDB(
"'" + email + "','" + nome + "','" + sobrenome + "','" + produto + "'", Double.parseDouble(valor) );
//closing connection
public void destroy()
connect.fecharConexao();
=============///////////////============
Here is the JavaBean.
package conJdbc;
import java.sql.*;
public class ConexPed
public Connection connection;
public Statement statement;
public ConexPed (String driver, String urlServidor, String user, String password)
try
Class.forName(driver);
connection = DriverManager.getConnection(urlServidor,user,password);
catch (ClassNotFoundException ex)
System.out.println("N�o foi poss�vel encontrar a classe do Driver: " + driver);
catch (SQLException ex)
System.out.println("N�o foi poss�vel conectar ao servidor");
try
statement = connection.createStatement();
catch (SQLException ex)
System.out.println("N�o foi poss�vel criar a statement");
*Inserting data to database
public synchronized boolean insertIntoDB( String stringtoinsert, double valor)
try
statement.executeUpdate( "INSERT INTO pedido values (" + stringtoinsert + " , " + valor + ");" );
catch ( Exception e ) {
System.err.println(
"ERROR: Problemas ao adicionar nova entrada" );
e.printStackTrace();
return false;
return true;
* Close statement.
public void fecharStatement()
try
statement.close();
catch (SQLException ex)
ex.printStackTrace();
* close database
public void fecharConexao()
try
connection.close();
catch (SQLException ex)
ex.printStackTrace();
}

Access EJB from Servlet that in different archive?

<font class="mediumtxt">package kyro.ejb.session;
import javax.ejb.*;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless(name="StandAlone")
@Remote(StandAlone.class)
public class StandAloneBean
implements StandAlone, StandAloneLocal
public StandAloneBean() {
public String sayHello() {
return "sayHello";
I want to access ejb from servlet that .war and .jar not in single .ear. I want to try that just with annotation not xml descriptor cause is easy to understand for me. I use Glassfish. But i can't lookup that ejb. How can i lookup that ejb with jndi? Can't you give me example of servlet to access that? I not use JNDI.properties, are that caused i can't access my ejb? I just thing .war and.jar in one server, are i have to used JNDI.properties. can you explain how to use JNDI.properties in servlet or separate file?
</font>

But i can't lookup that ejb. How are you trying and what exception is occurring?
How can i lookup that ejb with jndi? [https://glassfish.dev.java.net/javaee5/ejb/EJB_FAQ.html|https://glassfish.dev.java.net/javaee5/ejb/EJB_FAQ.html]
m

How to send a message from Servlet to JSP

Dear all,
I have JSP, with JavaScript (AJAX). If the user click on the button, the text will be sent to a Servlet parsed by doGet() and the user get a response to his input, without reloading a page.
How can I send a message to the users (JSP) from Servlet, if he didn't clicked any button and to other visitor of the page also? Is it possible? I think like a chat, the server sends a message to all users who are subscribed.
I don't know, what should I get from user, maybe session, that I could send him personal or common messages in his textarea. I should also invoke some JavaScript function to update his page. I have met some chats, you don't do nothing and get messages. It is also without a JavaScript timer, which invokes doGet() method. Asynchronous, only when there is a message.
Please help me with a problem.
Thanks in advance.

Hai ,
You can send any message through response.sendRedirect();
here is the coding try it
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class SimpleCounter extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("text/plain");
PrintWriter out = res.getWriter();
String username="java";
res.sendRedirect("http://localhost:8080/yourprojectname/jspfile.jsp?username="+username);
}

Redirecting to ASP from Servlet

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