Cannot Import javax.servlet.* and javax.servlet.http.*

Hello,
I am a University Student and now doing a project using Servlet and JSP
I have installed WinXP and Tomcat 5.0 on my computer
When I compile the servlet , there are error messages "package javax.servlet does not exist" and "package javax.servlet.http does not exist" coming out.
I have set the classpath already
i.e. %CATALINA_HOME%\common\lib\servlet-api.jar;%CATALINA_HOME%\common\lib\jsp-api.jar
( Of course "%CATALINA_HOME%" = my folder that install the Tomcat )
Can Anybody Explain what is happening and suggest a solution to me?
Please give a hand.

When you ran that command, what happened? Let javac.exe tell you the right answer.
I'd advise two things:
(1) Installing any s'ware in a directory whose name contains spaces (e.g., "Apache Software Foundation" or "Tomcat 5.0") is a very bad idea, IMO. I'd reinstall to a new directory.
(2) Your HelloServlet.java servlet probably doesn't have a package statement in it. Tomcat 5.0 won't play nicely with servlets or beans that aren't in packages. I'd add one and use the -d . option on javac.exe to make sure it created the package directory structure for me.

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Problems Compiling javax.servlet and javax.servlet.http

When I try to compile a program that imports both javax.servlet and javax.servlet.http, the compiler keeps telling me that "package javax.servlet does not exist"... I have place the javax.servlet packages in the src.zip and in the src folder but i dont understand why the compiler isnt picking them up. Maybe I did something wrong ... could someone help please

Try to compile vith the option "-classpath /your/path/to/servlet.jar"

Cannot import javax.servlet onto classpath

Hi guys, newbie question.
Im using jedit on linux; compiling with j2sdk1.4.2_04 but it will not pick up the javax.serlet
classes!! Is there an add on I need to download to develop j2ee stuff, as I thought j2sdk1.4.2_04 was all that was required.
Thanks in advance

Wrong. You need a JAR that has the javax.servlet and javax.servlet.http packages, and they don't come with the J2SE.
If you want to run servlets/JSPs, you must have a servlet/JSP engine. If you already have one, root around for the servlet JAR. If don't, download Tomcat. It's Sun's reference implementation for the servlet/JSP specifications. The servlet JAR will be in the TOMCAT_HOME/common/lib directory.

J2se vs j2ee javax.servlet.* & javax.servlet.HTTPServlet

Hi,
I guess I have a basic question....It is in j2se 1.4.2 API's one does not have the package javax.servlet.* or javax.servlet.HttpServer package/classes.How does one get to compile the java source file if it imports javax.servlet.* and javax.servlet.HttpServlet.,both of these are present in the j2ee API's.Help would be greatly appreciated.
Thanks
AS

Yup, pretty basic.
You're right - the javax.servlet and
javax.servlet.http packages are not part of the J2SE.
However, they are part of every servlet/JSP engine
you can find, including Tomcat and Sun ONE J2EE app.
Look for a j2ee.jar or servlet.jar (or servlet-api.jar
if you're using Tomcat 5.0.x) and you'll find those
classes. Once you locate the proper JAR, all you have
to do is make sure it's in your CLASSPATH when you
compile and run:
javac -classpath .;/full/path/to/servlet.jar *.java
MODThanks for the reply.So if we compile it we will get compile errors right?,without the appropriate classpath settings.Got you.
AS

Help With Integrating Servlet and JSP Page?

Hello There
--i made jsp page that contain name and description fields and add button
--and i made servlet that contain the code to insert name and description in the database
--and i want to make that when the user hit the add button
-->the entered name and description is sent to the servlet
and the servlet sent them to database?
here's what i 've done:
the jsp code:
<html:html locale="true">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>
        Categories Page
       </title>
        <html:base/>
    </head>
    <body style="background-color: white">
    <form action="jpage.jsp" method="get">
        <h1>
            <center>
categories Operations
            </center>
        </h1>
        <h3>
             <label>Name</label>
        <input type="text" name="name" value="" size="10" />
             <label>Description</label>
         <input type="text" name="description" value="" size="10" />
         <input type="submit" value="Add" name="button" />
       </h3>
   </form>
    </body>
</html:html>the servlet code:
import java.io.*;
import java.util.Enumeration;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.net.*;
class NewServlet1 extends HttpServlet{
     Connection conn;
     private ServletConfig config;
public void init(ServletConfig config)
throws ServletException{
     this.config=config;
public void service (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
   HttpSession session = req.getSession(true);
   res.setContentType("text/html");
try{
     Class.forName("com.mysql.jdbc.Driver");
   conn = DriverManager.getConnection("jdbc:mysql://localhost/struts", "root", "");
     PreparedStatement ps;
   ps = conn.prepareStatement ("INSERT INTO categories (Name, Description) VALUES(?,?)");
      ps.setString (1, "aa");
      ps.setString (3, "bb");
      ps.executeUpdate();
      ps.close();
      conn.close();
}catch(Exception e){ e.getMessage();}
public void destroy(){}
}

The JSP Code:
<html:html locale="true">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>
        Categories Page
       </title>
        <html:base/>
    </head>
    <body style="background-color: white">
    <form action="actionServlet.do?action=Additem" method="*post*">
        <h1>
            <center>
categories Operations
            </center>
        </h1>
        <h3>
             <label>Name</label>
        <input type="text" name="name" value="" size="10" />
             <label>Description</label>
         <input type="text" name="description" value="" size="10" />
         <input type="button" value="Submit">
       </h3>
   </form>
    </body>
</html:html>The Servlet Code:
import java.io.*;
import java.util.Enumeration;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.net.*;
public class NewServlet1 extends HttpServlet implements SingleThreadModel {
    public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException {
        doPost(request,response);
    public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException {
          String action = request.getParameter("action"); // action = "Additem"
          if (action.equals("Additem")) {
               String name = request.getParameter("name");
               String description = request.getParameter("description");
                     RequestDispatcher reqDisp = null;
               try{
              Connection conn;
              PreparedStatement ps;
     Class.forName("com.mysql.jdbc.Driver");
   conn = DriverManager.getConnection("jdbc:mysql://localhost/struts", "root", "");
   ps = conn.prepareStatement ("INSERT INTO categories (Name, Description) VALUES(?,?)");
      ps.setString (1, name);
      ps.setString (3, description);
      ps.executeUpdate();
      ps.close();
      conn.close();
      reqDisp= request.getRequestDispatcher("./index.jsp");
      reqDisp.forward(request, response);
               catch (Exception ex){
                    System.out.println("Error: "+ ex);
}The web.xml code:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <servlet>
        <servlet-name>action</servlet-name>
        <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
        <init-param>
            <param-name>config</param-name>
            <param-value>/WEB-INF/struts-config.xml</param-value>
        </init-param>
        <init-param>
            <param-name>debug</param-name>
            <param-value>2</param-value>
        </init-param>
        <init-param>
            <param-name>detail</param-name>
            <param-value>2</param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
        </servlet>
    <servlet>
        <servlet-name>NewServlet1</servlet-name>
        <servlet-class>NewServlet1</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>action</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>NewServlet1</servlet-name>
        <url-pattern>/NewServlet1</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
        </welcome-file-list>
        <servlet>
     <servlet-name>actionServlet</servlet-name>
     <servlet-class>com.test.servlet.NewServlet1</servlet-class>
</servlet>
<servlet-mapping>
     <servlet-name>actionServlet</servlet-name>
     <url-pattern>*.do</url-pattern>
</servlet-mapping>
    </web-app>

How to compile and execute servlet file in j2ee

In j2ee server when iam compiling servet i am getting error messages like package javax.servlet,and javax.servlet.http does not exist like that.
i hsve set path like this.and i gave path for j2sdk .
set CPATH=.;%J2EE_HOME%\lib\j2ee.jar
javac -classpath %CPATH% AdderServlet.java
can anybody tell me where to place
servlet and how to compile it.
Thank u,
Renuga

Make sure that '%J2EE_HOME%\lib\j2ee.jar' is existing. Where is your J2EE_HOME pointing to?
The best thing I can suggest is, create your own bat file to compile the servlets. Like this,
Save the lines below as "MyCompiler.bat" file.
@echo off
set JDK_HOME=<path to you jdk home upto bin directory>
set J2EE_HOME=<path to you je22 home>
set CLASSPATH=.;%J2EE_HOME%\lib\j2ee.jar
%JDK_HOME%\javac %1
Use the command,
MyCompiler AdderServlet.java
You can improve this MyCompiler.bat further, can add additional jar files to the classpath whenever you want. You can put this bat file in System's path, so that you can invoke it just by the name (MyCompiler) without giving the full path to it (like C:\mydir\MyCompiler).
Hope this helps.
Sudha

Javax.crypto.* and javax.crypto.spec.* problem with MHP receiver

Hello to everyone, I started to program in MHP 1.0.2 on a MHP receiver and now i'm practicing in encrypting and decrypting. I load from the smart card in the MHP receiver an X509Certificate object (I have it both in byte[] form, called certArray, and X509Certificate object, called "certificate"). What i'd like to do is to :
1)calculate digest of the certificate (line 1 and 2 of the following code)
2) encrypt the digest using the same algorithm of the certificate (see line 3 and 4)
The problem is generated at line 3 : the receiver, probably, doesn't find the class of the algorithm of encrypting. It is important to notice that the instruments to encrypt/decrypt are included in javax.crypto and javax.crypto.spec packages.
MessageDigest md = MessageDigest.getInstance("SHA");
byte[] digest = md.digest(certArray);
Cipher encrypt = Cipher.getInstance(certificate.getSigAlgName());
encrypt.init(Cipher.ENCRYPT_MODE, certificate.getPublicKey());
The error message, in the log file, is the following :
[0#1:2] java.security.NoSuchAlgorithmException: SHA1withRSA not found
     [0#1:2]      at javax.crypto.Cipher.getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;(Unknown Source)
     [0#1:2]      at it.csp.SecurelabXlet.encrypt()V(Unknown Source)
     [0#1:2]      at it.csp.SecurelabXlet.cardInserted(Lopencard/core/event/CardTerminalEvent;)V(Unknown Source)
     [0#1:2]      at opencard.core.event.EventGenerator.createEventsForPresentCards(Lopencard/core/event/CTListener;)V(Unknown Source)
     [0#1:2]      at it.csp.SecurelabXlet.register()V(Unknown Source)
     [0#1:2]      at it.csp.SecurelabXlet.startXlet()V(Unknown Source)
     [0#1:2]      at java.lang.reflect.Method.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;(Unknown Source)
     [0#1:2]      at tv.osmosys.application.AppManager$XletApp.xletStart()Z(Unknown Source)
     [0#1:2]      at tv.osmosys.application.AppManager$XletApp.loop0(Ltv/osmosys/application/AppManager$XletAction;)V(Unknown Source)
     [0#1:2]      at tv.osmosys.application.AppManager$XletApp.run()V(Unknown Source)
     [0#1:2]      at java.lang.Thread.run()V(Unknown Source)
     [0#1:2]      at java.lang.Thread.startup(Z)V(Unknown Source)
My question(s) is : how can I include javax.crypto and javax.crypto.spec in the Xlet application to upload it onto the MHP receiver?? Is it possibile to do so?
Eventually, do other libraries exist to use encrypting algorithms, included in MHP? The version I use of MHP is 1.0.2. Thank you! Bye!

Hello to everyone, I started to program in MHP 1.0.2 on a MHP receiver and now i'm practicing in encrypting and decrypting. I load from the smart card in the MHP receiver an X509Certificate object (I have it both in byte[] form, called certArray, and X509Certificate object, called "certificate"). What i'd like to do is to :
1)calculate digest of the certificate (line 1 and 2 of the following code)
2) encrypt the digest using the same algorithm of the certificate (see line 3 and 4)
The problem is generated at line 3 : the receiver, probably, doesn't find the class of the algorithm of encrypting. It is important to notice that the instruments to encrypt/decrypt are included in javax.crypto and javax.crypto.spec packages.
MessageDigest md = MessageDigest.getInstance("SHA");
byte[] digest = md.digest(certArray);
Cipher encrypt = Cipher.getInstance(certificate.getSigAlgName());
encrypt.init(Cipher.ENCRYPT_MODE, certificate.getPublicKey());
The error message, in the log file, is the following :
[0#1:2] java.security.NoSuchAlgorithmException: SHA1withRSA not found
     [0#1:2]      at javax.crypto.Cipher.getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;(Unknown Source)
     [0#1:2]      at it.csp.SecurelabXlet.encrypt()V(Unknown Source)
     [0#1:2]      at it.csp.SecurelabXlet.cardInserted(Lopencard/core/event/CardTerminalEvent;)V(Unknown Source)
     [0#1:2]      at opencard.core.event.EventGenerator.createEventsForPresentCards(Lopencard/core/event/CTListener;)V(Unknown Source)
     [0#1:2]      at it.csp.SecurelabXlet.register()V(Unknown Source)
     [0#1:2]      at it.csp.SecurelabXlet.startXlet()V(Unknown Source)
     [0#1:2]      at java.lang.reflect.Method.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;(Unknown Source)
     [0#1:2]      at tv.osmosys.application.AppManager$XletApp.xletStart()Z(Unknown Source)
     [0#1:2]      at tv.osmosys.application.AppManager$XletApp.loop0(Ltv/osmosys/application/AppManager$XletAction;)V(Unknown Source)
     [0#1:2]      at tv.osmosys.application.AppManager$XletApp.run()V(Unknown Source)
     [0#1:2]      at java.lang.Thread.run()V(Unknown Source)
     [0#1:2]      at java.lang.Thread.startup(Z)V(Unknown Source)
My question(s) is : how can I include javax.crypto and javax.crypto.spec in the Xlet application to upload it onto the MHP receiver?? Is it possibile to do so?
Eventually, do other libraries exist to use encrypting algorithms, included in MHP? The version I use of MHP is 1.0.2. Thank you! Bye!

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Cannot import javax.servlet

Hello,
I'm trying to write a javabean to use with in jsp code.
In the bean I need to use <code>HttpServletResponse and for this I need to add :
</code>import javax.servlet.*;
import javax.servlet.http.*;
this throws me the exception : package javax.servlet does not exist.
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Hello,
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Cannot Import javax.servlet.* and javax.servlet.http.*

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