Compilation problem in a JSP page

Hi all,
I'm trying to write a jsp page and some java stuff in it.
It goes something like this -
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ page contentType="text/html;charset=windows-1255"%>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=windows-1255"/>
    <title>Michael</title>
</head>
<body>
<%
          String strError="";
%>
</body>Now the problem is that I get compilation problem about the use in java -
"String cannot be resolved to a type"
I know for sure that in other computers it's work, the question is what I'm missing?
I have Java VM installed and I've downloaded and installed the latest JDK, what else?
thanks,
Michael.

Michael4488 wrote:
BalusC wrote:
Then you should be using JSTL/EL.I don't familiar with this technology, any way - Its work on one computer so in my understanding it should work on the other as well.It is not related to the actual problem. It was just a comment on your code. Using scriptlets is considered as bad practice.
I understand that of course, but I don't use any configuration file or set any special parameters in my computer.
What exactly does the compiler need in order to recognize the Java code in the JSP page? If i manually add the JAVA_HOME environment variable it will work?
where should I refer it to? "..\Java\jre1.6.0_07\lib" will do?It must point to the root installation directory of the JDK (thus not the JRE!).

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<pre>
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18:00:50,718 ERROR [WEBAPP] Class/Method: tcActionBase/execute encounter some problems: {1}
java.lang.NullPointerException
at com.thortech.xl.webclient.actions.tcLookupDispatchAction.execute(Unknown Source)
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at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
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at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
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at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
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</pre>
Edited by: iceman513 on Aug 11, 2010 7:14 PM
Edited by: iceman513 on Aug 24, 2010 10:32 AM
Edited by: iceman513 on Aug 24, 2010 10:33 AM

once you click a button, say, "Draw Rectangle", it should draw a rectangleYes, but you need to repaint() the component (in your case panel) to see the change.
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2. For a JFrame to be centered on the screen, setLocationRelativeTo(null) after setting the size, not before.
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Edited by: alynoor on Jul 8, 2010 1:51 AM
Edited by: alynoor on Jul 8, 2010 1:55 AM

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here is the error in the browser:
500 Internal Server Error
java.lang.NoClassDefFoundError: com/collaxa/common/util/NonSyncStringWriter at com.oracle.bpel.client.ClientResources.sanitizeArgs(ClientResources.java:123) at com.oracle.bpel.client.ClientResources.getString(ClientResources.java:93) at com.oracle.bpel.client.util.BeanRegistry.lookupDomainManagerBean(BeanRegistry.java:232) at com.oracle.bpel.client.auth.DomainAuthFactory.authenticate(DomainAuthFactory.java:83) at com.oracle.bpel.client.Locator.<init>(Locator.java:126) at com.oracle.bpel.client.Locator.<init>(Locator.java:97) at mypackage2.BpelManager.invokeProcess(BpelManager.java:58) at mypackage2.ConstanciaTrabajoAction.execute(ConstanciaTrabajoAction.java:45) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.0)].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65) at oracle.security.jazn.oc4j.JAZNFilter.doFilter(Unknown Source) at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.0)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:649) at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.0)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:322) at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.0)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:790) at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.0)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:270) at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.0)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:112) at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.0)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192) at java.lang.Thread.run(Thread.java:534)
here the strut.config:
<?xml version = '1.0' encoding = 'windows-1252'?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>
<action-mappings>
<action path="/constanciaTrabajoAction" type="mypackage2.ConstanciaTrabajoAction" input="/constanciaTrabajo.jsp" scope="request" validate="true">
<forward name="OK" path="/exito.jsp"/>
<forward name="FALLO" path="/fracaso.jsp"/>
</action>
</action-mappings>
<message-resources parameter="mypackage2.ApplicationResources"/>
</struts-config>
the jsp file:
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<%@ page import="java.util.*"%>
<%@ page contentType="text/html;charset=windows-1252"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>untitled</title>
</head>
<body>
<html:link action="/constanciaTrabajoAction">Constancia de Trabajo</html:link></body>
</html>
here the java files:
* ConstanciaTrabajoAction.java
package mypackage2;
import java.util.Map;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import java.io.IOException;
import javax.servlet.ServletException;
public class ConstanciaTrabajoAction extends Action
* This is the main action called from the Struts framework.
* @param mapping The ActionMapping used to select this instance.
* @param form The optional ActionForm bean for this request.
* @param request The HTTP Request we are processing.
* @param response The HTTP Response we are processing.
* @throws javax.servlet.ServletException
* @throws java.io.IOException
* @return
public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
String xml = "<ConcatRequest xmlns='http://xmlns.oracle.com/Concat'>"
+"<input><Solicitud><SolicitudData><tipoSolicitud>Constancia Trabajo</tipoSolicitud>"
+"</SolicitudData><Solicitante><ID>vcuello</ID><Nombre>Veronica</Nombre><Apellido>Cuello"
+"</Apellido><Email>[email protected]</Email></Solicitante><Supervisor><ID>rperez</ID>"
+"<Nombre>Roberto</Nombre><Apellido>Perez</Apellido><Email>[email protected]</Email>"
+"</Supervisor><Gerente><ID>asanchez</ID><Nombre>Alfredo</Nombre> <Apellido>Sanchez</Apellido>"
+"<Email>[email protected]</Email></Gerente><Datos><Dato><Nombre>dato</Nombre>"
+"<Valor>valor</Valor></Dato></Datos><exito><notificacionCons>false</notificacionCons>"
+"<docManager><imprimir>false</imprimir><firmar>false</firmar></docManager></exito></Solicitud>"
+"</input>"
+ "</ConcatRequest>";
String oxml = "<ConcatResponse xmlns='http://xmlns.oracle.com/Concat'>"
+ "<result></result>"
+ "</ConcatResponse>";
BpelManager.invokeProcess("ConstanciaTrabajo","initiate",xml);
Map res = BpelManager.requestProcess("ConstanciaTrabajo","onResult",oxml);
return mapping.findForward("OK");
* [i]BpelManager.java
package mypackage2;
import com.oracle.bpel.client.Locator;
import com.oracle.bpel.client.NormalizedMessage;
import com.oracle.bpel.client.ServerException;
import com.oracle.bpel.client.delivery.IDeliveryService;
import com.oracle.bpel.client.util.WhereCondition;
import com.oracle.services.bpel.task.ITask;
import com.oracle.services.bpel.task.IWorklistService;
import java.util.Map;
import java.util.Properties;
public class BpelManager
static Locator locator = null;
static String bpelDomain = "default";
static String bpelDomainPassword = "bpel";
static String orabpelPlatform = "oc4j_10g";
static String javaNamingFactoryInitial = "com.evermind.server.rmi.RMIInitialContextFactory";
static String javaNamingProviderUrl = "ormi://develc15:23791";
static String javaNamingSecurityPrincipal = "admin";
static String javaNamingSecurityCredentials = "welcome";
static String dedicatedRmiContext = "true";
public static String bpelProcessName = "ConstanciaTrabajo";
public static void invokeProcess(String processName, String operationName, String sXml)
try
Properties props = new java.util.Properties();
props.setProperty("orabpel.platform",orabpelPlatform);
props.setProperty("java.naming.factory.initial",javaNamingFactoryInitial);
props.setProperty("java.naming.provider.url",javaNamingProviderUrl);
props.setProperty("java.naming.security.principal",javaNamingSecurityPrincipal);
props.setProperty("java.naming.security.credentials",javaNamingSecurityCredentials);
props.setProperty("dedicated.rmicontext", dedicatedRmiContext);
locator = new Locator(bpelDomain,bpelDomainPassword,props);
/*IDeliveryService deliveryService = (IDeliveryService)locator.lookupService(IDeliveryService.SERVICE_NAME);
// construct the normalized message and send to Oracle BPEL Process Manager
NormalizedMessage nm = new NormalizedMessage( );
nm.addPart("payload", sXml);
deliveryService.post(processName, operationName, nm);*/
} catch (Exception r)
r.printStackTrace();
public static Map requestProcess(String processName, String operationName, String sXml)
try
IDeliveryService deliveryService = (IDeliveryService)locator.lookupService(IDeliveryService.SERVICE_NAME);
//IDeliveryService deliveryService = (IDeliveryService)locator.lookupService(IDeliveryService.SERVICE_NAME );
// construct the normalized message and send to Oracle BPEL Process Manager
NormalizedMessage nm = new NormalizedMessage( );
nm.addPart("payload", sXml );
NormalizedMessage res = deliveryService.request(processName, operationName, nm);
Map payload = res.getPayload();
return payload;
} catch (Exception r)
r.printStackTrace();
return null;
public static ITask[] queryWorklistService(String arg)
// Lookup the worklist service.
IWorklistService worklist =
(IWorklistService)locator.lookupService( IWorklistService.SERVICE_NAME );
try
ITask[] tasks = worklist.listTasksByAssignee(arg);
return tasks;
} catch (ServerException s)
s.printStackTrace();
return null;
public static ITask[] queryWorklistServiceByCondition(WhereCondition cond)
// Lookup the worklist service.
IWorklistService worklist =
(IWorklistService)locator.lookupService( IWorklistService.SERVICE_NAME );
try
ITask[] tasks = worklist.listTasks(cond);
return tasks;
} catch (ServerException s)
s.printStackTrace();
return null;
public static void updateTask(ITask task)
// Lookup the worklist service.
IWorklistService worklist =
(IWorklistService)locator.lookupService( IWorklistService.SERVICE_NAME );
try
worklist.updateTask(task);
} catch (ServerException s)
s.printStackTrace();
public static void completeTask(ITask task)
// Lookup the worklist service.
IWorklistService worklist =
(IWorklistService)locator.lookupService( IWorklistService.SERVICE_NAME );
try
worklist.completeTask(task);
} catch (ServerException s)
s.printStackTrace();
public static ITask lookupTask(String taskId)
// Lookup the worklist service.
IWorklistService worklist =
(IWorklistService)locator.lookupService( IWorklistService.SERVICE_NAME );
System.out.println("Entro a Cargo tarea");
try
ITask task = worklist.lookupTask(taskId);
System.out.println("Cargo tarea");
return task;
} catch (ServerException s)
System.out.println("La boto");
s.printStackTrace();
return null;
public void setLocator(Locator locator)
this.locator = locator;
public Locator getLocator()
return locator;
public void setBpelDomain(String bpelDomain)
this.bpelDomain = bpelDomain;
public String getBpelDomain()
return bpelDomain;
public void setBpelDomainPassword(String bpelDomainPassword)
this.bpelDomainPassword = bpelDomainPassword;
public String getBpelDomainPassword()
return bpelDomainPassword;
public void setOrabpelPlatform(String orabpelPlatform)
this.orabpelPlatform = orabpelPlatform;
public String getOrabpelPlatform()
return orabpelPlatform;
public void setJavaNamingFactoryInitial(String javaNamingFactoryInitial)
this.javaNamingFactoryInitial = javaNamingFactoryInitial;
public String getJavaNamingFactoryInitial()
return javaNamingFactoryInitial;
public void setJavaNamingProviderUrl(String javaNamingProviderUrl)
this.javaNamingProviderUrl = javaNamingProviderUrl;
public String getJavaNamingProviderUrl()
return javaNamingProviderUrl;
public void setJavaNamingSecurityPrincipal(String javaNamingSecurityPrincipal)
this.javaNamingSecurityPrincipal = javaNamingSecurityPrincipal;
public String getJavaNamingSecurityPrincipal()
return javaNamingSecurityPrincipal;
public void setJavaNamingSecurityCredentials(String javaNamingSecurityCredentials)
this.javaNamingSecurityCredentials = javaNamingSecurityCredentials;
public String getJavaNamingSecurityCredentials()
return javaNamingSecurityCredentials;
public void setDedicatedRmiContext(String dedicatedRmiContext)
this.dedicatedRmiContext = dedicatedRmiContext;
public String getDedicatedRmiContext()
return dedicatedRmiContext;
public void setBpelProcessName(String bpelProcessName)
this.bpelProcessName = bpelProcessName;
public String getBpelProcessName()
return bpelProcessName;
}

hi,
I fix it, thanx
static Locator locator = null;
// public static IWorklistService worklist = null;
static String bpelDomain = "default";
static String bpelDomainPassword = "bpel";
static String orabpelPlatform = "oc4j_10g";
static String javaNamingFactoryInitial = "com.evermind.server.rmi.RMIInitialContextFactory";
static String javaNamingProviderUrl = "ormi://myserver:23791/orabpel"; /*this was wrong
static String javaNamingSecurityPrincipal = "admin";
static String javaNamingSecurityCredentials = "welcome";
static String dedicatedRmiContext = "true";
static{
try{
Properties props = new java.util.Properties();
props.setProperty("orabpel.platform",orabpelPlatform);
props.setProperty("java.naming.factory.initial",javaNamingFactoryInitial);
props.setProperty("java.naming.provider.url",javaNamingProviderUrl);
props.setProperty("java.naming.security.principal",javaNamingSecurityPrincipal);
props.setProperty("java.naming.security.credentials",javaNamingSecurityCredentials);
props.setProperty("dedicated.rmicontext", dedicatedRmiContext);
locator = new Locator(bpelDomain, bpelDomainPassword, props);
} catch (ServerException se){se.printStackTrace();}
}

Problem in Reloading JSP Page

I am having list of users in parent window(1st JSP Page), user selects one user and presses edit button, the details of the selected user is populated in the pop-up window (using java script), now user modifies the details and presses the save button and i am fwd to parent window(child window is closed), now the details are saving in the database but the parent page is not displaying the updated user details. i am using struts to pass data from jsp to db. Even i used System.out.println statement in the user display loop(parent jsp page), the updated details is printing, but it is not shown in the web page.
Sabarish R L

Hi,
This is because ur page is not refreshed.
After updating database when u coming back to ActionClass, you can invoke mapping which refreshed ur JSP (means call a mapping which invoke ur JSP again but remember do not hit the database again it will reduce programe efficiency).

Problem with running jsp pages

Hello everybody,
I have created a simple jsp page in JBuilder10.
I have also installed tomcat 5.5.9
When i run the jsp page, it appears the following error :
LifecycleException: Protocol handler start failed: java.net.BindException: Address already in use: JVM_Bind:8080
What can i do in order to view my jsp page in a web browser?

you can change the address, because the address 8080 has already been used. open the file <CATALINA_HOME>/conf/server.xml , replace all 8080 by other value, like 1234.

I have problem in my jsp page

<%@ page import="beans.FormuBean" %>
<jsp:useBean id="formu" class="beans.FormuBean" />
<% FormuBean[] fbOnForm= (FormuBean[])request.getAttribute("fbDataToForm"); %>
<html>
<head>
</head>
<body>
     <%
          formu= (beans.FormuBean)pageContext.findAttribute("formu");
          for (int i=0; i<fbOnForm.length; i++){
          formu=fbOnForm;
          out.println (formu.getIdSeccion());
out.println (formu.getDNombreSeccion())
     %>
<jsp:getProperty name="formu" property="idSeccion" />
<jsp:getProperty name="formu" property="DNombreSeccion" />
<%}%>
</body>
</html>
My problem is: the info into <%...%> is well, but the info in <jsp:getProperty...> is wrong. That info is how create a new object "formu" (whit the same name) but inicializate a default constructor!!
Sorry for my english, I from Spain...
Thanks

Coding<jsp:useBean id="formu" class="beans.FormuBean" />is equivalent to:<%
beans.FormuBean formu = (beans.FormuBean) pageContext.getAttribute("formu");
if (formu == null) {
     formu = new beans.FormuBean();
     pageContext.setAttribute("formu", formu);
%>Coding<jsp:getProperty name="formu" property="idSeccion" />is equivalent to:
<%
formu = (beans.FormuBean) pageContext.getAttribute("formu");
out.println(formu.getIdSeccion());
%>jsp:getProperty retrieves the reference from the "formu" attribute which is why is does not give you what you want. Either save the new reference or don't use jsp:useBean and getProperty.
e.g.
<%@ page import="beans.FormuBean" %>
<jsp:useBean id="formu" class="beans.FormuBean" />
<% FormuBean[] fbOnForm= (FormuBean[])request.getAttribute("fbDataToForm"); %>
<html>
<head>
</head>
<body>
<%
for (int i=0; i<fbOnForm.length; i++){
    formu=fbOnForm;
out.println (formu.getIdSeccion());
out.println (formu.getDNombreSeccion())
pageContext.setAttribute("formu", formu); // save new reference as attribute for getProperty
%>
<jsp:getProperty name="formu" property="idSeccion" />
<jsp:getProperty name="formu" property="DNombreSeccion" />
<%}%>
</body>
</html>

Problem Running a jsp page in JDeveloper 9i

I have an application in JDeveloper 9i. i have compiled the application and when i right click one of the jsp's and say Run, it is not working and give the following message in the console: The system cannot execute the specified program.
I don't know what to do now. Please help me out to get out of this situation. I am new to JDeveloper.
- DeveloperBujji.

Does your jar file include the libraries that you are "importing" into your code?
(Maybe javax.print.*)

Problem in calling JSP page from a servlet

can anyone please tell me how to call a JSP from servlet?
My code is:
ServletContext sc = this.getServletContext();
                                             RequestDispatcher rd = sc.getRequestDispatcher("./Welcome.jsp");
                                             if (rd !=null)
                                                  try
                                                       rd.forward(req, res);
                                                  catch (Exception e)
                                                       sc.log("---------------Problem invoking JSP.------------------", e);
I n the browser when i call this servlet it gives error-404.
NOT Found.
please help.

I would try to change "./Welcome.jsp" to "/Welcome.jsp". I'm not sure what that period will do.
Are you able to access that JSP directly from your browser (even if it's not designed to be accessed that way)? If not, then you have some other problem.
When you say you get a 404 when you access the servlet, is that when you access the servlet, or when it tries to forward to the JSP? If you get the 404 when you access the servlet, perhaps your servlet-mapping to the servlet is invalid.

Problem in displaying jsp page

I read a tutorial and followed their instrction where the first step is to install a server so I installed the Blazix server.
I then put this following jsp file in the c:\blazix\webfiles and named it as hello.jsp.
I first ran the server and then open that file where it shows :
Hello ! The time is now
<html>
<body>
<%@ page import="java.util.*" %>
<HTML>
<BODY>
<%!
Date theDate = new Date();
%>
Hello! The time is now <%= theDate %>
</BODY>
</HTML>

if by apache you mean Tomcat then its a good idea to start with that one.
http://jakarta.apache.org/tomcat/index.html

Out.println() problems with large amount of data in jsp page

I have this kind of code in my jsp page:
out.clearBuffer();
out.println(myText); // size of myText is about 300 kbThe problem is that I manage to print the whole text only sometimes. Very often happens such that the receiving page gets only the first 40 kb and then the printing stops.
I have made such tests that I split the myText to smaller parts and out.print() them one by one:
Vector texts = splitTextToSmallerParts(myText);
for(int i = 0; i < texts.size(); i++) {
out.print(text.get(i));
out.flush();
}This produces the same kind of result. Sometimes all parts are printed but mostly only the first parts.
I have tried to increase the buffer size but neither that makes the printing reliable. Also I have tried with autoFlush="false" so that I flush before the buffer size gets overflowed; again same result, sometimes works sometimes don't.
Originally I use such a system where Visual Basic in Excel calls a jsp page. However, I don't think that this matters since the same problems occur if I use a browser.
If anyone knows something about problems with large jsp pages, I would appreciate that.

Well, there are many ways you could do this, but it depends on what you are looking for.
For instance, generating an Excel Spreadsheet could be quite easy:
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class TableTest extends HttpServlet{
     public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
          response.setContentType("application/xls");
          PrintWriter out = new PrintWriter(response.getOutputStream());
                out.println("Col1\tCol2\tCol3\tCol4");
                out.println("1\t2\t3\t4");
                out.println("3\t1\t5\t7");
                out.println("2\t9\t3\t3");
          out.flush();
          out.close();
}Just try this simple code, it works just fine... I used the same approach to generate a report of 30000 rows and 40 cols (more or less 5MB), so it should do the job for you.
Regards

Compilation problem in a JSP page

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