Spring MVC on Oracle 11gR1

Question

Hi

I am using Eclipse webtools to develop a hello world application that runs on oracle 11gR1 development server. I use the Oracle eclipse tools to perform the deployment on the server.

I am following the 'Developing a Spring Framework MVC application step-by-step' guide. I passed step 1 by having a simple jsp work. But step 2 brings me to a heart breaking dead end problem. I have appended all the relevant files.

The custom controller I have created seems to execute succesfully. It forwards to a jsp which contains only html. And then the clast cast exception. But the jsp doesnt get to execute any of the actual work, as a scriptlet at the top of the page with System.out.println does not show up.

I'm not at all sure why this error occurs. As I was writing this I realized I havent tried debugging this problem. After starting the server in debug and setting a breakpoint for ClassCastException... It worked successfully. The horror.

So solving the problem has lost priority for me, but when I do want to, I'll modify vm parameters to debug manually rather than using eclipse's method. But somehow I do not think this will help to fixing the problem, but rather just understanding it.

So I geuss, what I'm interisted in is whether someone else has had this issue, or any insight on the problem?

Thank you. (I'm still only posting this since I spent allot of time putting it together :-P)

I am using the 'Spring 2.5.6 with dependencies' distribution which I downloaded in the last 2 days.

Here is my web.xml

<!DOCTYPE web-app PUBLIC
  "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
  "http://java.sun.com/dtd/web-app_2_3.dtd"&gt;

<web-app>
  <servlet>
    <servlet-name>springapp</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>

<servlet-mapping>
    <servlet-name>springapp</servlet-name>
    <url-pattern>*.html</url-pattern>
  </servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

Then I have my springapp-servlet.xml inside WEB-INF folder

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"&gt;

  <!-- the application context definition for the springapp DispatcherServlet -->

  <bean name="/hello.html" class="my.package.HelloController"/>

</beans>

I have my hello controller code as follows:

public class HelloController implements Controller {

    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        return new ModelAndView("hello.jsp");
    }
}

The following is the stacktrace I receive.

java.lang.ClassCastException: org.apache.jasper.runtime.JspWriterImpl cannot be cast to weblogic.servlet.jsp.ByteWriter
    at jsp_servlet.__hello._jspService(__hello.java:65)
    at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
    at weblogic.servlet.internal.ServletStubImpl.onAddToMapException(ServletStubImpl.java:408)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:318)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
    at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:502)
    at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:248)
    at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:236)
    at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:257)
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1183)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:902)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
    at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3588)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
    at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2200)
    at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2106)
    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1428)
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)