Using DLL with JSP

I have a dll component writing with C++.
I want to use this DLL in a JSP Pages.
Is it possible?
How could i do?
I don't want to use JNI because I don't know JAVA.
thanks.
Bye.

I have a dll component writing with C++.
I want to use this DLL in a JSP Pages.
Is it possible?Yes.
How could i do?With JNI.
I don't want to use JNI because I don't know JAVA.Then you are screwed. Maybe you should use ASP.

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I am using JDeveloper and I created a screen in JSP which uses a bean for database connectivity and retriving info onto the page.
The page has a ListBox where list items are populated from the database.My requirement is
whenever the list is changed the page shuold be refreshed with the selected item info.
I tried to use 'JavaScript' for triggering the event with 'onChange' event of the ListBox.But the event is not getting invoked. I think JavaScript is not working with JSP.
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null

We have a similar need. We have used Cold Fusion to display data from Our Oracle Database. We have a simple SElect Box in HTML populated with the oracle data. When someone selects say the State of Pennsylvania. then we have an On change event that runs a Javascript to go get all the cities in Pennsylvania.
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How do you include JARs in a classpath so that the classes inside can be referred to in <%@ page import="mypackageinajar.myclassinajar" %> ? I've looked through the JSP docs but it only covered import statements. If I can't use a JAR, how would I enable my program to access the class files that I could just manually extract from the JAR?
Thanks

How do you include JARs in a classpath so that the
classes inside can be referred to in <%@ page
import="mypackageinajar.myclassinajar" %> ? I've
looked through the JSP docs but it only covered
import statements. If I can't use a JAR, how would I
enable my program to access the class files that I
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How to use dll with applet?

I want to use a dll with a applet.
I try several solutions : signed applet, dll in jar, ... But without any result.

U can use it if u sign the applet. It is a bit trick way though.
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Can anyone guide me of using LDAP with JSP?

I am a beginner in java. Plz post your answers in a simple and easy manner and explain it clearly. I am doing a project for which I require to use LDAP in JSP.

I assume he wants to use LDAP to authenticate user logon in a JSP application.
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HTH.

How to use DLL in JSP?

          Hello, all,
          I wrote a program to check the user authentication by call Windows's cryptography
          functions. I have generated a DLL file,
          and have put it in the C:\bea\jdk131_03\jre\bin. But my jsp
          page seems ignoring the java code to call the function in the
          DLL. I am not sure what should be imported at the head of the
          jsp file. Would somebody kindly help me out? Thanks a lot!!!
          My jsp code is here:
          <%@ page import="java.sql.Connection"%>
          <html>
          <head>
          <title>
          Jsp1
          </title>
          </head>
          <body>
          <h1>
          JBuilder Generated JSP
          </h1>
          <%
          try{
          if(Ntauth.authenticate("gecorg", "almond", "1025"))
          out.println("Valid user credenticals");
          else
          out.println("Invalid user credenticals");
          }catch(Exception e)
          out.println(e);
          %>
          </body>
          </html>


          One of my friend helped me to generate a new dll,
          just changed the package name. Then it works. I don't
          know why. But anyway, it works. Thanks everybody for
          your attention.
          "Sylvie" <[email protected]> wrote:
          >
          >Sorry, I found the function names are not match in my previou
          >post. The name is too long. I missed to type "authenticateNTUser" as
          >"authenticateUser"
          >in the SimpleNTAuthentication.java. I have fixed it. I repost them in
          >the following.
          >So the function name in the .h also corrected. But I still get the same
          >error.
          >
          >Do you know what's wrong?
          >
          >
          >"Sylvie" <[email protected]> wrote:
          >>
          >>Hi, Ann,
          >>
          >>Thanks for replying! But I have checked the function names.
          >>They looks the same. I post the code here, would please have
          >>a look.
          >>
          >>Thanks a lot,
          >>Sylvie
          >>---------------------------------------------------------
          >>SimpleNTAuthentication.java
          >>
          >>package Infolenz.Authentication;
          >>
          >>public class SimpleNTAuthentication {
          >>
          >> static {
          >> System.loadLibrary("ntauth");
          >> }
          >>
          >>
          >> private static native boolean authenticateNTUser(
          >> String domainName, // string that specifies the domain
          >> String userId, // string that specifies the user name
          >> String password // string that specifies the password
          >> );
          >> public static boolean authenticate(String domainName, String userId,
          >>String
          >>password)
          >> {
          >>
          >> if (domainName == null || userId == null || password == null)
          >> return false;
          >> else
          >> return authenticateNTUser(domainName, userId, password);
          >>
          >> }
          >>
          >>
          >>}
          >>---------------------------------------------------------
          >>javah generated Infolenz_Authentication_SimpleNTAuthentication.h
          >
          >/* DO NOT EDIT THIS FILE - it is machine generated */
          >#include <jni.h>
          >/* Header for class Infolenz_Authentication_SimpleNTAuthentication */
          >
          >#ifndef IncludedInfolenz_Authentication_SimpleNTAuthentication
          >#define IncludedInfolenz_Authentication_SimpleNTAuthentication
          >#ifdef __cplusplus
          >extern "C" {
          >#endif
          >/*
          > * Class: Infolenz_Authentication_SimpleNTAuthentication
          > * Method: authenticateNTUser
          > * Signature: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)Z
          > */
          >JNIEXPORT jboolean JNICALL Java_Infolenz_Authentication_SimpleNTAuthentication_authenticateNTUser
          > (JNIEnv *, jclass, jstring, jstring, jstring);
          >
          >#ifdef __cplusplus
          >}
          >#endif
          >#endif
          >
          >>----------------------------------------------------------------
          >>ntauth.cpp
          >>
          >>#include "Infolenz_Authentication_SimpleNTAuthentication.h" // native
          >>library
          >>included
          >>#include "stdio.h" // standard input and output
          >>#include "afxwin.h" // MFC core and standard components
          >>#include "jni.h"
          >>
          >>JNIEXPORT jboolean JNICALL
          >> Java_Infolenz_Authentication_SimpleNTAuthentication_authenticateNTUser
          >> (JNIEnv *env,
          >> jclass javaClass,
          >> jstring jDomainName,
          >> jstring jUserId,
          >> jstring jPassword )
          >>{
          >> jboolean authenticated;
          >> HANDLE hToken;
          >>
          >>
          >> // get the provided domain name, user id and password
          >> const char *cDomainName = env->GetStringUTFChars(jDomainName, 0);
          >> const char *cUserId = env->GetStringUTFChars(jUserId, 0);
          >> const char *cPassword = env->GetStringUTFChars(jPassword, 0);
          >>
          >>
          >> // Copy the char array to temporary variables to be
          >> // passed to LogonUser. This copy is done to guarantee the
          >> // const nature of the jstring char array.
          >> // Inappropriate access to this data can crash the VM!
          >> char *domainName = new char[env->GetStringUTFLength(jDomainName)
          >+
          >>1];
          >> char *userId = new char[env->GetStringUTFLength(jUserId) + 1];
          >> char *password = new char[env->GetStringUTFLength(jPassword) + 1];
          >>
          >> strcpy(domainName, cDomainName);
          >> strcpy(userId, cUserId);
          >> strcpy(password, cPassword);
          >>
          >> // release the chars back to the VM
          >> env->ReleaseStringUTFChars(jDomainName, cDomainName);
          >> env->ReleaseStringUTFChars(jUserId, cUserId);
          >> env->ReleaseStringUTFChars(jPassword, cPassword);
          >>
          >> // try to authenticate
          >> if (LogonUser( userId,
          >> domainName,
          >> password,
          >> LOGON32_LOGON_NETWORK,
          >> LOGON32_PROVIDER_DEFAULT,
          >> &hToken))
          >>
          >> authenticated = JNI_TRUE;
          >> else
          >> authenticated = JNI_FALSE;
          >>
          >> // delete the memory that was allocated
          >> delete domainName;
          >> delete userId;
          >> delete password;
          >>
          >> // close the handle created by LogonUser
          >> CloseHandle(hToken);
          >>
          >> return authenticated;
          >>}
          >>
          >>-------------------------------------------------------------
          >>
          >>Ann Cao <[email protected]> wrote:
          >>>Are you using JNI? There are two problems that could cause Unsatisfied
          >>>link errors. One is the DLL not found, and the other is that the DLL
          >>>is
          >>>found but is unreadable or the specific function cannot be found in
          >>it.
          >>>Since you have set your path correctly, I guess the reason you got
          >the
          >>>error is the second cause.
          >>>
          >>>Sylvie wrote:
          >>>
          >>>> I wrote a test java program to call the authenticate function.
          >>>> but get a Unsatisfied Link Error. It seems that my program
          >>>> has problem to load the DLL. But I have set the path to include
          >>>> the directory containing the DLL. Dose somebody know what is going
          >>>on?
          >>>>
          >>>> Thanks,
          >>>> Sylvie
          >>>>
          >>>> "Sylvie" <[email protected]> wrote:
          >>>> >
          >>>> >Hello, all,
          >>>> >
          >>>> >I wrote a program to check the user authentication by call Windows's
          >>>> >cryptography
          >>>> >functions. I have generated a DLL file,
          >>>> >and have put it in the C:\bea\jdk131_03\jre\bin. But my jsp
          >>>> >page seems ignoring the java code to call the function in the
          >>>> >DLL. I am not sure what should be imported at the head of the
          >>>> >jsp file. Would somebody kindly help me out? Thanks a lot!!!
          >>>> >My jsp code is here:
          >>>> >
          >>>> ><%@ page import="java.sql.Connection"%>
          >>>> >
          >>>> ><html>
          >>>> ><head>
          >>>> ><title>
          >>>> >Jsp1
          >>>> ></title>
          >>>> ></head>
          >>>> >
          >>>> ><body>
          >>>> ><h1>
          >>>> >JBuilder Generated JSP
          >>>> ></h1>
          >>>> ><%
          >>>> > try{
          >>>> > if(Ntauth.authenticate("gecorg", "almond", "1025"))
          >>>> > out.println("Valid user credenticals");
          >>>> > else
          >>>> > out.println("Invalid user credenticals");
          >>>> > }catch(Exception e)
          >>>> > {
          >>>> > out.println(e);
          >>>> > }
          >>>> > %>
          >>>> >
          >>>> >
          >>>> ></body>
          >>>> ></html>
          >>>> >
          >>>
          >>>--
          >>>Regards,
          >>>Ann
          >>>Developer Relations Engineer
          >>>BEA Support
          >>>
          >>>
          >>
          >

How to use SOAP with JSP (New to SOAP)

Hi,
i had a sch assignment(a set of JSPs)............anyone know how i can go about using soap for the encoding of data ? cos i had read up some books but i'm not sure how to go about implementing it !!!!! Anyone can help me?
Regards,
khim

Hey,
Just trying to understand the assignment objective:
You have a SOAP message or some web-service that replies with SOAP messages?
You have been asked to write a JSP that (queries this web-service and) retrieves the SOAP encoded data and transform it into XHTML (by whatever method you want) using XSLT?
Is this the situation?
If it is you will need to get the DTD or XSD of the SOAP message you will be displaying. This will tell you what elements to expect, what attributes they have and their sequencing.
Then your problem is just the XSL style sheet. Here is a link if you do not kow much about XSL:
http://www.w3schools.com/xsl/default.asp
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I hope the advice is not too late.
Warm regards,
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Using JavaBean with JSP...will not work no matter what

Hi guys. Sorry that this is such a common, newb question, but I don't know where else to turn.
I'm new to web application development, Tomcat, and JSP. I'm trying to use a simple JavaBean in a JSP to store some user information. The JSP is located in $CATALINA_HOME\webapps\art , and the UserBean I'm trying to use is in $CATALINA_HOME\webapps\art\WEB-INF\classes . I've tried adding a context in the Tomcat server.xml file, but nothing seems to work, even putting the .class file into the \art directory along with the JSP. The error I get is the following:
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 1 in the jsp file: /welcome.jsp
Generated servlet error:
[javac] Compiling 1 source file
C:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\art\welcome_jsp.java:43: cannot resolve symbol
symbol : class UserBean
location: class org.apache.jsp.welcome_jsp
UserBean user = null;
^
The source code is:
welcome.jsp
<%@ page import="java.sql.*" %>
<jsp:useBean id="user" class="UserBean" scope="session"/>
<html>
<head>
<title>Art Webapp Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<h1>Art Site</h1><br><br>
<h3>Welcome Page</h3><br><br>
<%
     user.setUsername("joe");
user.setTitle("admin");
%>
</body>
</html>
UserBean:
public class UserBean {
private String username = null;
private String title = null;
public UserBean()
     this.username = null;
     this.title = null;
public String getUsername()
     return this.username;
public String getTitle()
     return this.title;
public void setUsername(String inName)
     this.username = inName;
public void setTitle(String inTitle)
     this.title = inTitle;
}//UserBean
Thanks for any and all help anyone could give me about this. It seems such a simple thing, to get a JavaBean working in a JSP...and it's very frustrating to have it NOT work when it seems I've done everything possible to get it to.

Ok, I figured out what the problem was. My Bean was not a part of any specific package. It was never made clear to me that Beans are required to be a part of some package...I had no idea (though they always put them in packages in the tutorials, you think I would have picked up on it!).
So I just added the following line to the Bean:
package com.art;
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Ta-da
Thanks for the help and sorry for taking up space on this board.
-Matt

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Hi,
I am trying to display results after a database query on a JSP page, and then provide the options delete or update one of these records or to add a new one.
What I did was to pass the ResultSet object to the webpage, and then display the result. When the buttons are pressed, I pass this ResultSet to another jsp page where I provide the required functionality. This is then forwarded back to the previous JSP, where the new data is displayed.
However, when the first page is re-displayed, it creates a new connection and i was wondering if there is a way to close the previous connection through the ResultSet?
Also, I wanted to put the ResultSet in a bean, but I think it is causing an error in the web server, saying something like it is not Serializable. Is there any other way to pass the ResultSet around?
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cheers
Ankur

Bad idea to be passing ResultSets around. Those are database cursors, a scarce resource.
You should load that data into a data structure, close the ResultSet immediately, and then pass the data structure around in session if you must.
Better yet, have a central servlet that deals with all database calls. Let the JSPs just do display, as they were meant to. - MOD

I want to use nl2br with JSP

Hi, I wouldlike to know how use this method
nl2br(java.lang.string)
I write it in my code :
String texte=nl2br(ProdServ);
and the serveur error is :
Generated servlet error:
C:\Program Files\Apache Tomcat 4.0\work\Standalone\localhost\_\Site_changement\ModifEnt$jsp.java:139: Method nl2br(java.lang.String) not found in class org.apache.jsp.ModifEnt$jsp.
String texte=nl2br(ProdServ);
^
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java.lang.Object
|
--com.generationjava.web.HtmlW
what i have to import? Do I have to import it in my page only?
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Using JDBC with JSP

I have a standalone application using Swing. Im converting it to a web / JSP/Servlets application.
Can my JSP acess my database using the same classes it used to or should I configure in my Tomcat a data source and call my database using the jndi name ?
thx in advance,
Giselle

Agreed - JSPs are best for presentation.
I have a front controller servlet that delegates to POJOs to do database interactions and then forwards results to JSPs for display. No scriptlet code in my pages, no database interactions, just looping through collections and displaying the results. - MOD

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the JFreeChart documentation has examples doing just that.
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Using beans with jsp

Hi
i am using tomcat 6.0 and jdk 1.6u17
i am trying to use a bean to connect to MySql db using jsp page but i keep getting the error :
org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to load class for JSP
i read about it and i think that it is unable to locate my bean class file
here is the beanDb.java
package beans;
import java.sql.;
import java.io.;
public class beanDb
private Connection dbCon;
String path="jdbc:mysql://localhost:3306/dbname?user=username&password=pwd";
String dbDriver="com.mysql.jdbc.Driver";
public beanDb()
super();
public boolean connect() throws ClassNotFoundException,SQLException
Class.forName(dbDriver);
dbCon = DriverManager.getConnection(path);
return true;
public void close() throws SQLException
dbCon.close();
public void path()
public ResultSet execSQL(String sql) throws SQLException
Statement s = dbCon.createStatement();
ResultSet r = s.executeQuery(sql);
return (r == null) ? null : r;
public int updateSQL(String sql) throws SQLException
Statement s = dbCon.createStatement();
int r = s.executeUpdate(sql);
return (r == 0) ? 0 : r;
and the jsptest.jsp code is :
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="beanDb" class="beanDb" scope="request" />
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Untitled Document</title>
</head>
<body>
<%
out.println(beanDb.connect());
%>
</body>
</html>
the location of these files are :
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\myApp\WEB-INF\classes\beans\beanDb.java
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\myApp\jsptest.jsp
Please suggest a solution..
Thanks

http://forums.sun.com/thread.jspa?threadID=5423314

Using beans with jsp without any ide

Hi
i am using tomcat 6.0 and jdk 1.6u17
i am trying to use a bean to connect to MySql db using jsp page but i keep getting the error :
org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to load class for JSP
i read about it and i think that it is unable to locate my bean class file
here is the beanDb.java
package beans;
import java.sql.*;
import java.io.*;
public class beanDb
     private Connection dbCon;
     String path="jdbc:mysql://localhost:3306/dbname?user=username&password=pwd";
     String dbDriver="com.mysql.jdbc.Driver";
     public beanDb()
          super();
     public boolean connect() throws ClassNotFoundException,SQLException
Class.forName(dbDriver);
dbCon = DriverManager.getConnection(path);
return true;
     public void close() throws SQLException
     dbCon.close();
     public void path()
     public ResultSet execSQL(String sql) throws SQLException
          Statement s = dbCon.createStatement();
ResultSet r = s.executeQuery(sql);
return (r == null) ? null : r;
     public int updateSQL(String sql) throws SQLException
     Statement s = dbCon.createStatement();
int r = s.executeUpdate(sql);
return (r == 0) ? 0 : r;
and the jsptest.jsp code is :
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="beanDb" class="beanDb" scope="request" />
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Untitled Document</title>
</head>
<body>
<%
               out.println(beanDb.connect());
               Connection connection;
               Statement stmt = null;
               ResultSet rs = null;
%>
</body>
</html>
the location of these files are :
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\ROOT\myApp\WEB-INF\classes\beans\beanDb.java
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\ROOT\myApp\jsptest.jsp
Please suggest a solution..
Thanks

here is the changed code but still the same error:
package beans;
import java.sql.;
import java.io.;
public class beanDb
private Connection dbCon;
String path="jdbc:mysql://localhost:3306/dbname?user=username&password=pwd";
String dbDriver="com.mysql.jdbc.Driver";
public beanDb()
super();
public boolean connect() throws ClassNotFoundException,SQLException
Class.forName(dbDriver);
dbCon = DriverManager.getConnection(path);
return true;
public void close() throws SQLException
dbCon.close();
public void path()
public ResultSet execSQL(String sql) throws SQLException
Statement s = dbCon.createStatement();
ResultSet r = s.executeQuery(sql);
return (r == null) ? null : r;
public int updateSQL(String sql) throws SQLException
Statement s = dbCon.createStatement();
int r = s.executeUpdate(sql);
return (r == 0) ? 0 : r;
and the jsptest.jsp code is :
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="beanDb" class="beanDb" scope="request" />
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Untitled Document</title>
</head>
<body>
<%
out.println(beanDb.connect());
%>
</body>
</html>
the location of these files are :
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\myApp\WEB-INF\classes\beans\beanDb.java
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\myApp\jsptest.jsp

Flush=true, Should i be using this with jsp:forward...

I had read up on this flush=true. SHould i be using it. Does it cause memory leaks with out it. I have read many articles and im confused. Can anyone explain this to me.
Thanks

anyone have any ideas on this. I have read through most of the forums and I am still unclear,
Thanks again

Using DLL with JSP

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