Hi everybody, JSP+servlets+.exe execution+package problem

hi, i've read on java's forums that it is possible to execute an external class from a JSP and this (external class) can execute an .exe(Runtime a = Runtime.getRuntime()) i don't know if it was developed with JSP or servlet because they didn't put the code but it's factible, another question is if its necessary to package all clases to use some of them (1 class or 2) in a JSP?, or Can i just use one class with a main() executed by a servlet says?. last i've want to know if it's possible to communicate a servlet and a JSP and viceversa, i would apretiate much your help, thanks.

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(JSP/SERVLET) File upload Character problem form enctype="multipart.....

Hi,
When i upload a file from <form> ( jsp page ) and send it to my object class(struts,servlet) , the filename ��.doc are replaced by ?????.doc. in the database.
I make few test by adding UTF-8 charset and content type to the jsp but still doesn't work...
Ex :
String encod = request.getCharacterEncoding();
if (encod == null || !encod.equals("UTF-8"))
try
request.setCharacterEncoding("UTF-8");
catch (UnsupportedEncodingException e)
System.err.println("HttpMultipartRequest - : " + e);
It's not a charset problem in the database because i try to do with an input type="text" and its working. It's just not working with the input type="file".
And i also add directly �� character into the database and its working.
it's will be a pleasure if someone could response to me .
thanks
Jonathan

warnerja,
Not sure why you always play the part of the
cross-post police... Seems like waste of effort to
me.To each his own. I'm not sure why you feel the need
to question my motives. Also not sure why you have
posted requests to Sun regarding forum features...
"Seems like a waste of effort to me.". But I wasn't
going to call you on it.touch�
:-)

Metadata problem with JSP/servlet application

Hi,
I developed a JSP/servlet test application that makes
use of kodo 2.2.3 STANDARD EDITION for its persitence.
I successfully compile and annotate the application.
I am also able to successfully generate the db
schema with schematool.
Unfortunately, when I run the application using
Resin 2.0.2, Kodo is unable to initialize properly.
Initially it was not able to find "system.prefs" file.
I fixed that by putting "system.prefs" in WEB-INF\classes.
Unfortunately, Kodo is still unable to initialize and
gives the following message:
The system could not initialize; the following registered
persistent types are missing metadata
or have not been enhanced:
[class com.dpov.purchaseorder.PurchaseOrder,
class com.dpov.catalog.Product,
class com.dpov.uidgen.counter.Counter,
class com.dpov.catalog.dao.jdo.CategoryHierarchyEntry,
class com.dpov.catalog.dao.jdo.CategoryHierarchyDAO,
class com.dpov.pricelist.PriceInfo,
class com.dpov.pricelist.PriceList,
class com.dpov.catalog.Category,
class com.dpov.lineitem.LineItem,
class com.dpov.dealer.Dealer,
class com.dpov.user.User,
class com.dpov.customer.Customer].
I use "system.jdo" to describe metadata for the enhancer.
I tried to put it both in WEB-INF\lib and WEB-INF\classes but
it still fails.
Please note that:
1) my classpath variable is not set
2) my application's class file are in WEB-INF\classes
3) kodo jars are in WEB-INF\lib
4) mysql jdbc driver is in WEB-INF\lib
5) system.prefs is in WEB-INF\classes
6) system.jdo is in WEB-INF\classes
Thanks in advance,
Andrea
system.prefs
<?xml version="1.0"?>
<prefs>
<kodo-license-key>VALID KEY!</kodo-license-key>
<db>
<username></username>
<password></password>
<url>jdbc:mysql://localhost/kodo</url>
<driver>org.gjt.mm.mysql.Driver</driver>
<dictionary>
com.solarmetric.kodo.impl.jdbc.schema.dict.MySQLDictionary
</dictionary>
<warn-on-persistent-type-failure>true</warn-on-persistent-type-failure>
</db>
<tm-location>java:/TransactionManager</tm-location>
</prefs>
system.jdo
<?xml version="1.0"?>
<jdo>
<package name="com.dpov.uidgen.counter">
<class name="Counter" />
</package>
<package name="com.dpov.customer">
<class name="Customer" />
</package>
<package name="com.dpov.user">
<class name="User" />
</package>
<package name="com.dpov.dealer">
<class name="Dealer" />
</package>
<package name="com.dpov.catalog">
<class name="Product" />
</package>
<package name="com.dpov.catalog">
<class name="Category" />
</package>
<package name="com.dpov.catalog.dao.jdo">
<class name="CategoryHierarchyDAO">
<field name="categories">
<collection element-type="com.dpov.catalog.Category"/>
</field>
</class>
</package>
<package name="com.dpov.catalog.dao.jdo">
<class name="CategoryHierarchyEntry">
<field name="attributeValues">
<map key-type="String" value-type="CategoryHierarchyEntry"/>
</field>
<field name="productIds">
<collection element-type="String"/>
</field>
</class>
</package>
<package name="com.dpov.lineitem">
<class name="LineItem" />
</package>
<package name="com.dpov.purchaseorder">
<class name="PurchaseOrder">
<field name="lineItems">
<collection element-type="com.dpov.lineitem.LineItem"/>
</field>
</class>
</package>
<package name="com.dpov.pricelist">
<class name="PriceInfo" />
</package>
<package name="com.dpov.pricelist">
<class name="PriceList">
<field name="priceInfos">
<map key-type="String" value-type="PriceInfo"/>
</field>
</class>
</package>
</jdo>

Hi,
I fixed my problem by setting the system wide variable (WindowsXP)
CLASSPATH to r:\\dealershop\\WEB-INF\\classes.
Thanks,
Andrea
andrea costantinis wrote:
Hi,
I developed a JSP/servlet test application that makes
use of kodo 2.2.3 STANDARD EDITION for its persitence.
I successfully compile and annotate the application.
I am also able to successfully generate the db
schema with schematool.
Unfortunately, when I run the application using
Resin 2.0.2, Kodo is unable to initialize properly.
Initially it was not able to find \"system.prefs\" file.
I fixed that by putting \"system.prefs\" in WEB-INF\\classes.
Unfortunately, Kodo is still unable to initialize and
gives the following message:
The system could not initialize; the following registered
persistent types are missing metadata
or have not been enhanced:
[class com.dpov.purchaseorder.PurchaseOrder,
class com.dpov.catalog.Product,
class com.dpov.uidgen.counter.Counter,
class com.dpov.catalog.dao.jdo.CategoryHierarchyEntry,
class com.dpov.catalog.dao.jdo.CategoryHierarchyDAO,
class com.dpov.pricelist.PriceInfo,
class com.dpov.pricelist.PriceList,
class com.dpov.catalog.Category,
class com.dpov.lineitem.LineItem,
class com.dpov.dealer.Dealer,
class com.dpov.user.User,
class com.dpov.customer.Customer].
I use \"system.jdo\" to describe metadata for the enhancer.
I tried to put it both in WEB-INF\\lib and WEB-INF\\classes but
it still fails.
Please note that:
1) my classpath variable is not set
2) my application\'s class file are in WEB-INF\\classes
3) kodo jars are in WEB-INF\\lib
4) mysql jdbc driver is in WEB-INF\\lib
5) system.prefs is in WEB-INF\\classes
6) system.jdo is in WEB-INF\\classes
Thanks in advance,
Andrea

Using JSP/Servlet to write Word Document to BLOB

Hi
I need some help pls
When I use a normal class with a main method, it loads the word document into a blob and I can read this 100%.Stunning.
With a JSP/Servlet I cannot get the document out again. The "format" seems to be lost.
Any ideas,help greatly appreciated:
Here is the Main class that works:
package mypackage1;
import java.io.OutputStream;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileNotFoundException;
import java.io.Writer;
import java.sql.Connection;
import oracle.jdbc.*;
import oracle.jdbc.OracleResultSet;
import oracle.sql.BLOB;
import org.apache.log4j.Logger;
import Util_Connect.DataBase;
public class TestLOB
//static final Logger logger = Logger.getLogger("test");
public TestLOB()
public static void main(String args[])
TestLOB testLOB = new TestLOB();
testLOB.TestLOBInsert("c:\\my_data\\callcenterpilot.doc");
public void TestLOBInsert(String fileName)
Connection conn = getConnection("wizard");
BLOB blob = null;
try
conn.setAutoCommit(false);
String cmd = "SELECT * FROM so_cs.testlob WHERE docno = 1 FOR UPDATE";
PreparedStatement pstmt = conn.prepareStatement(cmd);
ResultSet rset = pstmt.executeQuery(cmd);
rset.next();
blob = ((OracleResultSet)rset).getBLOB(2);
File binaryFile = new File(fileName);
System.out.println("Document length = " + binaryFile.length());
FileInputStream instream = new FileInputStream(binaryFile);
OutputStream outstream = blob.getBinaryOutputStream();
int size = blob.getBufferSize();
byte[] buffer = new byte[size];
int length = -1;
while ((length = instream.read(buffer)) != -1)
outstream.write(buffer, 0, length);
instream.close();
outstream.close();
conn.commit();
closeConnection(conn);
catch (Exception ex)
System.out.println("Error =- > "+ex.toString());
private Connection getConnection(String dataBase)
Connection conn = null;
try
DriverManager.registerDriver(new OracleDriver());
conn = DriverManager.getConnection("jdbc:oracle:thin:@oraclu5:1600:dwz110","so_cs","so_cs");
catch (Exception ex)
System.out.println("Error getting conn"+ex.toString());
return conn;
private void closeConnection(Connection conn)
if (conn != null)
try
conn.close();
catch (Exception se)
System.out.println("Error closing connection in get last imei"+se.toString());
Works fine:
Here is the display servlet: Works when main class inserts file
package mypackage1;
import java.io.InputStream;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileNotFoundException;
import java.io.Writer;
import java.sql.Connection;
import oracle.jdbc.*;
import oracle.jdbc.OracleResultSet;
import oracle.sql.BLOB;
import org.apache.log4j.Logger;
import Util_Connect.DataBase;
public class DisplayLOB extends HttpServlet
private static final String CONTENT_TYPE = "text/html; charset=windows-1252";
static final Logger logger = Logger.getLogger(DisplayLOB.class);
public void init(ServletConfig config) throws ServletException
super.init(config);
public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
//response.setContentType(CONTENT_TYPE);
//PrintWriter out = response.getWriter();
Connection conn = null;
PreparedStatement pstmt = null;
try
conn = getConnection("wizard");
//out.println("<html>");
//out.println("<head><title>DisplayLOB</title></head>");
//out.println("<body>");
//out.println("<p>The servlet has received a POST. This is the reply.</p>");
InputStream is=null;
oracle.sql.BLOB blob=null;
response.setContentType("application/msword");
//response.setContentType("audio/mpeg");
OutputStream os = response.getOutputStream();
String term = "1";
String query = "SELECT docdetail FROM testlob WHERE docno = 1";
pstmt = conn.prepareStatement(query);
ResultSet rs = pstmt.executeQuery();
while (rs.next())
blob=((OracleResultSet)rs).getBLOB(1);
is=blob.getBinaryStream();
int pos=0;
int length=0;
byte[] b = new byte[blob.getChunkSize()];
while((length=is.read(b))!= -1)
pos+=length;
os.write(b);
}//try
catch (Exception se)
se.printStackTrace();
finally
try
pstmt.close();
catch (Exception ex)
System.out.println("Error closing pstmt "+ex.toString());
//out.println("</body></html>");
//out.close();
private Connection getConnection(String dataBase)
Connection conn = null;
try
conn = DataBase.getPoolConnection(dataBase);
catch (Exception se)
logger.fatal("Error getting connection: ",se);
return conn;
private void closeConnection(Connection conn)
if (conn != null)
try
conn.close();
catch (Exception se)
logger.error("Error closing connection in get last imei",se);
Here is JSP/Servlet
<%@ page import="org.apache.log4j.*"%>
<%@ page contentType="text/html; charset=ISO-8859-1" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>untitled</title>
<title>Wizard SMS Interface</title>
<link rel='stylesheet' type='text/css' href='main1.css'>
<script language='JavaScript' src='copyright.js'></script>
</head>
<pre>
<%
//HTTP 1.1
response.setHeader("Cache-Control","no-cache");
//HTTP 1.0
response.setHeader("Pragma","no-cache");
//prevents caching at the proxy server
response.setDateHeader ("Expires", 0);
Logger logger = Logger.getLogger("co.za.mtn.wizard.administration.admin01.jsp");
%>
</pre>
<body>
<FORM ACTION="/WizardAdministration/uploadfile"
METHOD="POST"
ENCTYPE="multipart/form-data">
<INPUT TYPE="FILE" NAME="example">
<INPUT TYPE="SUBMIT" NAME="button" VALUE="Upload">
</FORM>
</body>
</html>
<font> <b>Copyright ©
<script>
var LMDate = new Date( document.lastModified );
year = LMDate.getYear();
document.write(display(year));
</script>
Mobile Telephone Networks.
<p align="left"><i><b><font face="Georgia, Times New Roman, Times, serif" size="1"></font></b></i></p>
package co.za.mtn.wizard.admin;
import java.io.InputStream;
import java.util.Enumeration;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileNotFoundException;
import java.io.Writer;
import java.sql.Connection;
import oracle.jdbc.OracleResultSet;
import oracle.sql.BLOB;
import org.apache.log4j.Logger;
import Util_Connect.DataBase;
public class UploadFile extends HttpServlet
private static final String CONTENT_TYPE = "text/html; charset=windows-1252";
//static final Logger logger = Logger.getLogger(UploadFile.class);
public void init(ServletConfig config) throws ServletException
super.init(config);
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
String headerName = null;
Enumeration en = request.getHeaderNames();
try
while ( en.hasMoreElements() )
Object ob = en.nextElement();
headerName = ob.toString();
System.out.println("Value for headerNAme is >"+headerName+"<");
String aaa = request.getHeader(headerName);
System.out.println("Value for aa is >"+aaa+"<");
catch (Exception ex)
System.out.println("Error in extracting request headers"+ex.toString());
Connection conn = getConnection("wizard");
BLOB blob = null;
try
conn.setAutoCommit(false);
String cmd = "SELECT * FROM so_cs.testlob WHERE docno = 1 FOR UPDATE";
PreparedStatement pstmt = conn.prepareStatement(cmd);
ResultSet rset = pstmt.executeQuery(cmd);
rset.next();
blob = ((OracleResultSet)rset).getBLOB(2);
//File binaryFile = new File("h:\\callcenterpilot.doc");
//System.out.println("Document length = " + binaryFile.length());
//FileInputStream instream = new FileInputStream(binaryFile);
response.setHeader("Content-Type","application/vnd.ms-word");
String contentType = request.getContentType();
System.out.println("Content type received in servlet is >"+contentType+"<");
ServletInputStream instream = request.getInputStream();
OutputStream outstream = blob.getBinaryOutputStream();
int size = blob.getBufferSize();
byte[] buffer = new byte[size];
int length = -1;
while ((length = instream.read(buffer)) != -1)
outstream.write(buffer, 0, length);
instream.close();
outstream.close();
conn.commit();
closeConnection(conn);
response.setContentType(CONTENT_TYPE);
PrintWriter out = response.getWriter();
catch (Exception ex)
System.out.println("Error =- > "+ex.toString());
//out.println("</body></html>");
//out.close();
private Connection getConnection(String dataBase)
Connection conn = null;
try
conn = DataBase.getPoolConnection(dataBase);
catch (Exception se)
System.err.println("Error getting connection: "+se.toString());
return conn;
private void closeConnection(Connection conn)
if (conn != null)
try
conn.close();
catch (Exception se)
System.err.println("Error closing connection in get last imei"+se.toString());
This is what the display servlet is showing when the JSP/Servlet insert the document
-----------------------------7d31422224030e
Content-Disposition: form-data; name="example"; filename="H:\(your name) Skills Matrix.doc"
Content-Type: application/msword
�� ࡱ � > ��
Tks
Andre

hello,
there are multiple documents out there, describing the oracle reports server setup. try doc.oracle.com for documentation.
also it is part of the online-documentation.
you need to install 9iAS enterprise edition. the server is pre-configured and will listen to the url http://yourserver/dev60cgi/rwcgi60.exe
passing only this url you will get a help-screen, describing the syntax.
regards,
the oracle reports team

Jsp / Servlet / bean / upload

Hello,
I use a jsp to enter several fields. These fields are sent to a servlet by using a bean (recorded in the current session). Until now there is no problem. The servlet receives all information. Now I must also send 5 files which must be stored on the server. I have thus to add in my jsp 5 file fields.
My question :
Is it possible to integrate the FileUpload package for uploader my files without anything to change in my code (by using of a bean to exchange the data between my jsp and my servlet). ??
In other words, it is possible to use my bean to also transport files. ??
Tank u for u help

Yes it is possible..
download cos.jar from www.oreily.com for file upload..
it will read dat from the form as two parts ..
parameter part and file part..
and you can implement it throgh a servlet easily..
for more follow oreily JSP/servlets Cookbook

JSP/Servlets & XML - suggestion needed

Hi everyone,
I don't have any coding issues, I'm really just looking for some help on deciding how to go with a project I want to make. First off, I wrote a Java library that builds messages in a special format. I wanted to come up with a pretty frontend for it, so I decided I'd try my hand at a webapp since I've been interested in them for a while. So far my web app consists of jsps, servlets and my library.
At this point I'd like to add the ability for the webapp to store created messages in an XML file (read / write). The XML library I want to use is JAXB. I have it setup to read/write my XML file fine in a test servlet, however I'd like to implement this in a kind of "best practice" approach. So I'm looking for suggestions on how I should do this.
A few of my ideas:
1) Use a jsp page to call a "MessagesBean" which retrieves my data from my xml file. I could then format this nicely in the jsp page. The problem with this however is that I can't find any way to open a file relative to the webapp from within a Bean. ie. when I try to open "messages.xml", I can see from tomcat errors that it attempts to open it in tomcats bin folder (or if i run from within eclipse, eclipses bin folder). I know I could get around this by using an absolute path but I want this to be portable. Any suggestions?
2) To solve the above problem I found "getServletContext().getRealPath("")" in the Servlet API. Using this method I'm able to open my XML file relative to my webapp. The only issue I have here is that I'm now using a servlet to display the page, making it harder for me to format the output.
I'm very new to JSP/Servlets/etc so I really don't know how I should be doing this. I'm just trying to make sure I don't start out on the wrong foot. Can someone please give some suggestions on what I could do?
Cheers.

I suggested not putting business logic in the servlet, but instead instansiating a business logic object in the servlet and calling one of its functions to do the work.
There is nothing wrong with putting the business logic in the servlet on first try. Just later on, you might want to refactor the code to more conform to the above.
In your code, you mentioned that the MessagesBean in the JSP page doesnt seem to call the constructor. The <useBean> tag first looks to
see if the object is in request scope. If it is, it uses it (doesnt call constructor). If its not, it creates its own (calls constructor). You should always
have it in request scope ready for useBean to use.
I think this line:
<jsp:useBean id="messages" class="my.package.MessagesBean" />
should be changed to something like:
<jsp:useBean id="messages" class="my.package.MessagesBean" scope="request" />
The MessagesBean should only have get/set methods to get data out of its object (its a very simple object that holds data). None of its functions
should perform business logic such as hitting the database.
Therefore these items in your JSP page should be in the servlet or business logic:
messages.setPath( getServletContext().getRealPath("") ); // Pass in relative PATH
messages.processXML(); // Process XML file
While this should be in your JSP:
java.util.List<TEXT> TextFiles = messages.getTEXTFiles(); // Return a List of TEXT objects
Question: The JSP calls my Bean "MessagesBean". It then passes in the current relative path. This seems fairly hackish to me, is there a better way to give the relative path to my bean?
Answer: Hard code the relative path to the JSP page in the servlet or business logic. There is no need for the JSP page to pass its path back to the servlet or business logic. Your servlet
'knows' the path to all the JSP pages it needs to dispatch to.
The best way to learn MVC is to continually refactor your code until it looks more and more like MVC (separation of concerns).

Java Controls, JSPs, Servlets and Filters

Hi, everybody.
How can i invoke a custom java control from a JSP ?
How can i invoke a custom java control from a Servlet or Filter ?
I've tried using WlwProxy.create(controlInterfaceClass, request) but i don't know if this is the "official and recommended" way of do it. By the way, invocation is falling because Workshop is trying to find a .jcx file (i have only a .jcs).
Thanks in advance.

Hi Vimala.
All the business logic of my project will be implemented as Java Controls (that's the reason of my questions about Controls' accessibility):
1. From a JSP
A) I can use netui tag <netui-data:callControl>
B) I can call a page flow to execute Java Control and to populate http request (or session) within some Java Beans. After this, the JSP will "consume" these Java Beans.
2. From init method of a startup Servlet
I can't call a Java Control from here. Can i implement analogous feature using Builtin Timer Control ?
3. From service (doGet/doPost) method of a "ordinary" Servlet
I can call a page flow to execute Java Control and to populate http request (or session) within some Java Beans. After this, the Servlet will "consume" these Java Beans.
4. From filter method of a Servlet Filter
This is the "trickest" one, but i really need to access business logic from here.
I've found an way (and i'm not proud of how i'm doing this):
i) The filter will populate a request attribute within information about which method of which control will be executed. Method parameters values will be stored too;
ii) The filter will "forward" request to a Page Flow, using a HttpServletRequestWrapper and a "dummy/empty" HttpServletResponseWrapper. This is really odd. I'm not sure if a filter should try to "forward" or to "include" another webapp resources. When doing this, you should be aware about issues like "recursion" and configurations like filter-dispatched-requests-enabled (http://edocs.bea.com/wls/docs90/webapp/progservlet.html#160016);
iii) The Page Flow will receive the new request, "unpack" invocation data, execute appropriate Java Control, "pack" the result in the http request and forward to an "empty" JSP;
iv) The "execution control" will be returned to the filter. This filter will "discard" the contents of HttpServletResponseWrapper, "unpack" the result data out of the http request and use it.
To "hide" all this mess of my filters and Page Flows, the filters will use a "dynamic proxy" to act as "Page Flow clients" (this proxy will look like as an ordinary Java Control to my filters). The Page Flows will use an helper class to store Java Controls (at onCreate lifecycle method), to use them (at begin method) and to discard/release them (at onDestroy lifecycle method).
I've tested this and it has worked. I'm not sure about performance and multithread behaviour of this solution.
I'm accepting any suggestion (official or "unofficial") about how to make this easier.
Thanks !!!
Sample code:
== JavaControlClientProxy.java ==
public Object invoke(Object proxy, Method method, Object[] parameters)
    throws Throwable {
    Object result = null;
    if (LOG.isDebugEnabled()) {
        LOG.debug("before: " + method.getName());
    try {
        HttpServletRequestWrapper newRequest =
             new HttpServletRequestWrapper(this.request);
        HttpServletResponseWrapper newResponse =
             new HttpServletResponseWrapper(this.response);
        InvocationData invocationData = new InvocationData();
        invocationData.setCaller(this.javaControlCaller);
        invocationData.setTarget(this.javaControlInterface);
        invocationData.setTargetMethod(method);
        invocationData.setParameters(parameters);
        newRequest.setAttribute(InvocationData.ATT_NAME, invocationData);
        try {
            RequestDispatcher dispatcher = this.request
                .getRequestDispatcher(this.javaControlServerPath);
            /* include doesn't work (.jpf ?) */
            dispatcher.forward(newRequest, newResponse);
            invocationData = (InvocationData) newRequest
                .getAttribute(InvocationData.ATT_NAME);
            if (invocationData.getException() != null) {
                throw invocationData.getException();
            } else {
                if (invocationData.getReturnValue() != null) {
                    result = invocationData.getReturnValue();
        } finally {
            newResponse.getWriter().close();
            newResponse.getOutputStream().close();
        return result;
    } finally {
        if (LOG.isDebugEnabled()) {
            LOG.debug("after: " + method.getName());
}== ControlCallController.jpf ==
* This method represents the point of entry into the pageflow
* @jpf:action
* @jpf:forward name="success" path="empty.jsp"
protected Forward begin()
    try {
        this.controlServer.execute(getRequest());
    } catch (IllegalArgumentException e) {
        try {
            /* Avoid external access to this resource. */
            getResponse().sendError(HttpServletResponse.SC_NOT_FOUND);
        } catch (IOException e1) {
            throw new UnhandledException(e1);
        throw e;
    return new Forward("success");
protected void onCreate() throws Exception {
    super.onCreate();
    this.controlServer = new JavaControlServer();
    this.controlServer.addControl(MyControl1.class, this.myControl1);
    this.controlServer.addControl(MyControl2.class, this.myControl2);
protected void onDestroy(HttpSession arg0) {
    this.controlServer = null;
    super.onDestroy(arg0);
}== JavaControlServer.java ==
public void execute(final HttpServletRequest request)
    throws IllegalArgumentException {
    InvocationData invocationData = (InvocationData) request
        .getAttribute(InvocationData.ATT_NAME);
    if (LOG.isDebugEnabled()) {
        LOG.debug("InvocationData " + invocationData + ".");
    if (invocationData == null) {
        throw new IllegalArgumentException("Http request doesn't contain "
                                           + InvocationData.ATT_NAME + ".");
    Control targetControl = (Control) this.controlMap.get(invocationData
                                                          .getTarget());
    if (targetControl == null) {
        throw new IllegalArgumentException("Missing control "
                                           + invocationData.getTarget() + ".");
    Method method = invocationData.getTargetMethod();
    try {
        Object returnValue = method.invoke(targetControl, invocationData
                                           .getParameters());
        invocationData.setReturnValue(returnValue);
    } catch (IllegalArgumentException e) {
        LOG.error("Could not invoke method", e);
        throw new UnhandledException(e);
    } catch (IllegalAccessException e) {
        LOG.error("Could not invoke method", e);
        throw new UnhandledException(e);
    } catch (InvocationTargetException e) {
        LOG.debug("An error has ocurred when invoking method", e);
        invocationData.setException(e.getCause());
    request.setAttribute(InvocationData.ATT_NAME, invocationData);
}

Can't get EntityManager access in JSP/Servlet

Hi all,
our team has started a EJB project (EJBs + JPA configurations)
we managed to access the configured JPA (EntityManager etc) within the EJB instance; however we don't know how to access the EntityManager within JSP/Servlet
Our project's structure:
1 EJB project (EJB classes, EntityBean classes, JPA configuration + eclipselink)
1 Web project (for JSP, Servlets)
the main problem is ... we can't access EntityManager(s) in JSP / Servlets (and we already tried using Struts2.0 to replace servlets/jsp... the problem is the same... so it is not ... the matter of choosing the view technology...)
Jason

Hi Jason,
How i tried to get EntityManager is as following:
Suppose I want to define my Persistence unit like Following:
*<Your-EAR>/APP-INF/classes/MyEmployee.java*
"*MyEmployee.java*"
package entityA;
import java.io.Serializable;
import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.apache.commons.lang.builder.ToStringBuilder;
import javax.persistence.*;
@Entity()
@Table(name="MYEMPLOYEE")
public class MyEmployee implements Serializable {
     //default serial version id, required for serializable classes.
     private static final long serialVersionUID = 1L;
     private Long empno;
     private String empname;
public MyEmployee() {
     @Id()
     @Column(name="EMPNO", unique=true, nullable=false, precision=22)
     public Long getEmpno() {
          return this.empno;
     public void setEmpno(Long empno) {
          this.empno = empno;
     @Basic()
     @Column(name="EMPNAME", length=15)
     public String getEmpname() {
          return this.empname;
     public void setEmpname(String empname) {
          this.empname = empname;
     public boolean equals(Object other) {
          if (this == other) {
               return true;
          if (!(other instanceof MyEmployee)) {
               return false;
          MyEmployee castOther = (MyEmployee)other;
          return new EqualsBuilder()
               .append(this.getEmpno(), castOther.getEmpno())
               .isEquals();
     public int hashCode() {
          return new HashCodeBuilder()
               .append(getEmpno())
               .toHashCode();
     public String toString() {
          return new ToStringBuilder(this)
               .append("empno", getEmpno())
               .toString();
And I have Placed My "*persistence.xml*" file in *"<Your-EAR>/APP-INF/classes/META-INF/persistence.xml"*
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
     version="1.0">
     <persistence-unit name="JPA_A_EJB" transaction-type="RESOURCE_LOCAL">
          <provider>org.hibernate.ejb.HibernatePersistence</provider>
          <class>entityA.MyEmployee</class>
          <properties>
               <property name="hibernate.dialect" value="org.hibernate.dialect.OracleDialect"/>
               <property name="hibernate.connection.driver_class" value="oracle.jdbc.OracleDriver"/>
               <property name="hibernate.connection.url" value="jdbc:oracle:thin:@localhost:1521:xe"/>
               <property name="hibernate.connection.username" value="jack"/>
               <property name="hibernate.connection.password" value="password"/>
          </properties>
     </persistence-unit>
</persistence>
***********************************HOW I Access The Above Unit from my EJB mentioned Below*******************************
"*EmployeeSessionBean.java*"
package sfsbA;
import entityA.*;
import javax.ejb.*;
import javax.persistence.*;
@Stateless
public class EmployeeSessionBean implements EmployeeSessionRemoteIntf
*@PersistenceContext*
protected EntityManager entityManager;
*///NOTE: Using the Above Technique You can access the "EntityManager" Object in your Servlets As well...Just write the Above two Lines inside your Servlet*
public void createEmployee(Long empno,String empname) throws Exception{
          System.out.println("\n\tcreateEmployee() called. EntityManager entityManager = "+entityManager);
          MyEmployee employee = new MyEmployee();
employee.setEmpno(empno);
employee.setEmpname(empname);
entityManager.persist(employee);
          System.out.println("\n\t Entity Manager has persisted the Employee Information...");
int count = 0;
public EmployeeSessionBean() {
System.out.println("\n\t EmployeeSessionBean--> EmployeeSessionBean() invoked");
@Init("create")
public void initMethod() throws CreateException {
System.out.println("\n\t EmployeeSessionBean--> public void initMethod() invoked");
@Remove(retainIfException=true)
public void removeWithRetain() throws Exception{
System.out.println("\n\t EmployeeSessionBean--> removeWithRetain() invoked");
@Remove
public void removeWithoutRetain() throws Exception{
System.out.println("\n\t EmployeeSessionBean--> removeWithoutRetain() invoked");
public String printRemoteIntf () {
System.out.println("\n\t EmployeeSessionBean ---> public String printRemoteIntf () invoked");
     return "ReplicableSFSRemoteObjectIntf";
public String printLocalIntf () {
System.out.println("\n\t EmployeeSessionBean ---> public String printLocalIntf () invoked");
     return "ReplicableSFSLocalObjectIntf";
public String printBean () {
System.out.println("\n\t EmployeeSessionBean ---> public String printBean () invoked");
     return "EmployeeSessionBean";
public int testIncrement() throws Exception
System.out.println("\n\t EmployeeSessionBean ---> public int testIncrement() invoked");
count=count+5;
return count;
public int testDecrement() throws Exception
System.out.println("\n\t EmployeeSessionBean ---> public int testDecrement() invoked");
count=count-2;
return count;
public int getCount() throws Exception
System.out.println("\n\t EmployeeSessionBean ---> public int getCount() invoked");
return count;
"*EmployeeSessionRemoteIntf.java*"
package sfsbA;
public interface EmployeeSessionRemoteIntf {
public void createEmployee(Long emono,String empname)     throws Exception;
public void removeWithRetain()throws Exception;
public void removeWithoutRetain() throws Exception;
public String printBean ();
public int testIncrement() throws Exception;
public int testDecrement() throws Exception;
public int getCount() throws Exception;
*"ejb-jar.xml"*
<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar version="3.0" 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/ejb-jar_3_0.xsd">
<enterprise-beans>
<session>
<ejb-name>EmployeeSessionBean</ejb-name>
<business-remote>sfsbA.EmployeeSessionRemoteIntf</business-remote>
<ejb-class>sfsbA.EmployeeSessionBean</ejb-class>
<session-type>Stateless</session-type>
</session>
</enterprise-beans>
</ejb-jar>
*"weblogic-ejb-jar.xml"* (I am writing these file Just because i want my Own JNDI Simple name...Not the Container Generated Complex JNDI name)
<weblogic-ejb-jar xmlns="http://www.bea.com/ns/weblogic/90" xmlns:j2ee="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.bea.com/ns/weblogic/90 http://www.bea.com/ns/weblogic/90/weblogic-ejb-jar.xsd">
<weblogic-enterprise-bean>
<ejb-name>EmployeeSessionBean</ejb-name>
<stateless-session-descriptor>
     <business-interface-jndi-name-map>
<business-remote>sfsbA.EmployeeSessionRemoteIntf</business-remote>
<jndi-name>EmployeeSessionBean</jndi-name>
     </business-interface-jndi-name-map>
</stateless-session-descriptor>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>
"*application.xml*"
<!DOCTYPE application PUBLIC '-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN' 'http://java.sun.com/dtd/application_1_3.dtd'>
<application>
<display-name>JPAs_Demo_Jason</display-name>
<module>
<ejb>AccessEntityManager.jar</ejb>
</module>
</application>
NOTE: The Jar "" Contains
1). EmployeeSessionBean
2). EmployeeSessionRemoteIntf
3). META-INF/ejb-jar.xml
4). META-INF/weblogic-ejb-jar.xml
Thanks
Jay SenSharma
http://jaysensharma.wordpress.com (Real WebLogic Stuff...Not less Than a Magic...Here)
Edited by: Jay SenSharma on Dec 16, 2009 10:59 PM
Edited by: Jay SenSharma on Dec 16, 2009 11:00 PM

Erratic behaviour of jsp & servlet

Hi,
I was just checking few things with passing as array from servlet to jsp
I was getting the expected output from jsp too, but when i refreshed the jsp i may or may not get the output
i.e. the output may come after 1 refresh click or it may not come even after clicking 4-5 times and it may come after 6th click.
Does it related to session in anyway?
The servlet code is,
package core;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class BeanTest extends HttpServlet
     String ar[]={"Ok ","This ","is ","working....! asap"};
     HttpSession hs;
     public void doGet(HttpServletRequest req,HttpServletResponse res)throws ServletException, IOException
          res.setContentType("text/html");
          hs=req.getSession(true);
          hs.setAttribute("ar",ar);
}And jsp code is
<%@ page session="true"%>
<jsp:include page="BeanTest" flush="true"/>
<%!String[] str=new String[3];
int i=0;
%>
<%str=(String[])session.getAttribute("ar");%>
Output is here <br>
<%while(i<4)
{%>
     <%=str%>
     <%
          i++;
}%>
Any idea why this is happening, im using tomcat 5.5 and jdk 1.5.
Thanks,
Harsh

This code is just to test, how a servlet can pass an array to a jsp?
Actually i'm having some problem with a project where i want to implement this functionallity,
there i want to take some data in string array (through servlet) from database and then want to pass that array to a jsp.
You can say it was just a prototype, I don't want to put my database code to jsp, for that reason i want to implement it.

Different Classloader for JSP, Servlets?

Hi!
          Does the WL5-JSP-servlet use an other classloader then the other
          servlets??
          I've previous posted an article with the subject "JSP - Servlet - Static
          Code in Classes".
          I will try to describe my problem better:
          At server startup I pass information to my startup servlet, for example
          the user and pw for our connection pool. The startup servlet instanciates
          the class Global which creates a db-pool with the user and pw getting
          from
          the startup-servlet.
          startup-servlet {
          public void init(ServletConfig config)
          Global.init("user","pw");
          The class Global looks like this:
          class Global {
          static {
          // register jdbc driver
          // store file informations
          static public init(string, string) {
          // init the connection pool with user and pw
          static public getConnection() {
          // returns connection from pool
          All our other servlets then just use the methode Global.getConnection()
          and other methods from the class Global.
          All servlets works perfect and can access the db-pool.
          When a jsp-file is called which also uses the methode
          Global.getConnection(), a new Instance of the class Global will be made.
          In order to init all values again, I would have to call the
          Global.init(user, pw) methode again.
          So my question is: Why does the jsp file causes a new instance of the
          class Global?
          Does the WL5-JSP-servlet use an other classloader then the other
          servlets??


I am seeing the problem is sp3. I can't use sp4 becuase form based
          authentication, FBA, was broken. I can only hope that FBA will be
          re-fixed in sp5.
          Kumar Allamraju wrote:
          >
          > If you are seeing this problem in SP4, yes this is a regression in SP4 &
          > SP5. We are already aware of this
          > problem. SP5 will be out in a week or so. But this fix won't be available
          > in SP5. Follow-up with
          > support.
          >
          > --
          > Kumar
          >
          > "Bryon G. Rigg" wrote:
          >
          > > I have an application which has a servlet that controls page navigation
          > > via an xml file. The servlet class is located beneath the
          > > WEB-INF/classes as is the xml file. When I have weblogic pointing to
          > > the app directory, my servlet finds the xml file, using the
          > > Class.getResourceAsStream() method, without a hitch. But when I
          > > package everything up into a war file, and point weblogic at the war
          > > file instead, the servlet can not locate the xml file.
          > >
          > > What gives? Is there some kind of brain-dead classloader being used
          > > for war files versus a normal classloader used for directories? Any
          > > workarounds? And when will sp5 be released? I have been hearing a
          > > week or two for weeks.
          [bryon.vcf]

Sending Mail from JSP-Servlet

hi all,
Can any one help me, how can i send the mail from JSP-Servlet.
in Spring, we have a the following package to send mail,
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;
Suggest me to solve the problem.
Thanx in advance.
Bala

Hi balu,
i already go thru that API. My problem is if i add any additional jar file for sending the mail from JSP or Servlets only. not in high technology.
i mention spring as an example.
so, kindly suggets me on that.
Bala

Upload video by using jsp/servlet

I'm using jsp/servlet to upload video file but I have a problem.
This error occurs for preparing SQL statement when I cast OraclePreparedStatement.
It is " Error : weblogic.jdbc.rmi.SerialPreparedStatement
at jsp_servlet._upload._jspService(_upload.java:185)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:263)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:200)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppSe
rvletContext.java:2390)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestIm
pl.java:1959)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)"
Please help me asap.
Thanks

You need to use the Oracle jdbc driver. Apparently, the Weblogic JDBC driver is being selected:
weblogic.jdbc.rmi.SerialPreparedStatement
The Oracle JDBC classes can be found in <ORACLE_HOME>/jdbc/lib/See <ORACLE_HOME>/jdbc/readme.txt for how to specify the correct class path in the application.
I would have thought that the oracle JDBC driver would have been selected (if in the classpath) or an exception would be raised if the Oracle JDBC driver was not found.... because the code should include:
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
This should load the Oracle jdbc driver and classes, not the weblogic ones. IF the Oracle JDBC drivers are not found, an exception should be raised...

Jsp,servlet,bean question,please help

The Tomcat Web server set up like this.......
The directory structure is
e:/sampleapp/WEB-INF/classes
/lib
And the web.xml is in the WEB-INF for the use of ay potential servlet.
The basic understanding is that all the .java files go into the WEB-INF directory and the .class files go into the classes directory.
All the .jsp files go into the sampleapp directory.Till here is correct I feel.
Now for my qustion......
I plan to use jsp,servlet and beans for a potential web application...,where do all these files go?,just the same as above or is there a difference.
Hope that I have given a reasonable explaination to my question.
Thanks for any replies
AS

All of your compiled servlet and java bean (java
classes in general) will be placed into the following
directory (under a directory structure matching the
java package they are in):
e:/sampleapp/WEB-INF/classesAll of your .jar files that are used as libraries (not
your .jar files for applets):
e:/sampleapp/WEB-INF/libAll of the rest of your JSP files, javascript files,
HTML files, JAR files, images files, etc. will go into
the following directory:
e:/sampleappYou must make sure you put your sampleapp directory
where tomcat can load it. Or use the admin tool to
load it. If you make a .WAR file with a corresponding
web.xml file in it, it will simplify loading it into
tomcat. It also will help you do your servlet
mappings, etc. I hope this helps.Thanks for your timely response.To add to it,let me tell you.
The <b>bean</b> files are put into a package right,so they should be put into the WEB-INF/classes/<package name>
What about The <b> servlet </b> files...... they are just put into the WEB-INF/classes/ directory????
Kindly let me know.
Thanks
AS

JSP- Servlet-- Bean-- JSP how to implement

I have problem.
My JSP will take a emplyee id .
Now I want to show all the values regarding that employee in a JSP(JSP form) from the DB(Oracle).
So Iam planning like
JSP-->Servlet-->Bean-->JSP
So my doubts are.
1. Is it correct approach
2.If it is correct then which part of the flow connects to DB and stores the value before putting to JSP.
Iam using Tomcat 4.31
Plz help me

I have problem.
My JSP will take a emplyee id .
Now I want to show all the values regarding that
employee in a JSP(JSP form) from the DB(Oracle).
So Iam planning like
JSP-->Servlet-->Bean-->JSP
So my doubts are.
1. Is it correct approach
2.If it is correct then which part of the flow
connects to DB and stores the value before putting to
JSP.
Iam using Tomcat 4.31
Plz help meHI
What you are probably proposing is an MVC design pattern. I wonder if u have heard of the struts framework. Sruts uses MVC design pattern wherein the servlet u are talking about acts as a controller(C) and the bean acts as the model(M) .The JSPs present the view(V). Hence the name MVC.
Your approach is right. First get the employee ID from the jsp and get the corresponding data from database(This logic u implement in the servlet). Then save the fetched data in a bean so that the result jsp can fetch data from it.
Now this is not a strict MVC approach.
Learn more about struts. It presents a much more cleaner solution.

Newbie JSP/Servlet general question

Hi,
I am currently studying the life cycle of a JSP page from the Java EE 5 Tutorial (http://java.sun.com/javaee/5/docs/tutorial/doc/bnahe.html). This document says that: "+If an instance of the JSP pages servlet does not exist, the container loads the JSP pages servlet class, instantiates an instance of the servlet class, initializes the servlet instance by calling the jspInit method+".
My two questions are:
i) Does this JSP servlet implement the HttpJspPage interface defined in javax.servlet.jsp?
ii) Does Struts and Spring MVC provide such JSP servlet Java classes implementations or are these part of other packages? If not, which packages offer such implementations?
Thanks,
J.

Jrm wrote:
Hi,
I am currently studying the life cycle of a JSP page from the Java EE 5 Tutorial (http://java.sun.com/javaee/5/docs/tutorial/doc/bnahe.html). This document says that: "+If an instance of the JSP pages servlet does not exist, the container loads the JSP pages servlet class, instantiates an instance of the servlet class, initializes the servlet instance by calling the jspInit method+".
My two questions are:
i) Does this JSP servlet implement the HttpJspPage interface defined in javax.servlet.jsp?Yes.
>
ii) Does Struts and Spring MVC provide such JSP servlet Java classes implementations or are these part of other packages? If not, which packages offer such implementations?No, the implementation for the JSP servlet is usually provided by the Servlet Container, not a framework, since the Servlet Container is responsible for creating and compiling the JSP.
>
Thanks,
J.

Hi everybody, JSP+servlets+.exe execution+package problem

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