[Opensource] Embedding JavaCodes in JSP
Will
jcoder at telus.net
Sat Dec 20 17:28:20 PST 2003
I noticed this in your error message "org.apache.jsp.ShiftTable". I'll bet
that your ShiftTable class is in a package something like
"com.something.ShiftTable". In you usebean tag you need to spesify the fully
qualified path like <jsp:useBean id="tableBean" scope="page"
class="com.something.ShiftTable">
I hope this helps, Happy Holidays.
-----Original Message-----
From: opensource-admin at jcorporate.com
[mailto:opensource-admin at jcorporate.com]On Behalf Of padmasini
Sent: December 18, 2003 10:38 PM
To: opensource at jcorporate.com
Subject: [Opensource] Embedding JavaCodes in JSP
Hi
This is my JSP codes
<HTML>
<HEAD>
<TITLE>Table Building</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<FONT FACE=VERDANA>
<H@ ALIGN=CENTER>Java Shift Operators
</h2><br>
<%@ page language="java" errorPage="error.jsp"%>
<jsp:useBean id="tableBean" scope="page" class="ShiftTable">
</jsp:useBean>
<jsp:setProperty name="tableBean" property="*" />
<%= tableBean.getTable() %>
</BODY>
</HTML>
Shift TAble.java
public class ShiftTable extends java.lang.Object{
protected int numb;
public ShiftTable(){ }
public void setNumb(String s)
{
this.numb=Integer.parseInt(s);
}
public String padBinary(int n){
String
tmp="00000000000000000000000"+Integer.toBinaryString(n);
return tmp.substring( tmp.length()-32);
}
void buildRow(StringBuffer sb,String hdr, int n){
sb.append("<tr><th");
sb.append(hdr);
sb.append("/th><td>");
sb.append(Integer.toString(n));
sb.append("</td><td>");
sb.append( padBinary( n ));
sb.append("</td></tr>\r\n");
}
public java.lang.String getTable(){
StringBuffer sb=new StringBuffer();
sb.append("\r\n\r\n<table align=\"center\" border=\"2\""+
"cellpadding=\"5\">\r\n<caption>");
sb.append("Shifting"+numb+"<br>\r\n");
sb.append("</caption>\r\n<tr><th>Operation</th><th>Decimal</th>"+
"<th>Hex</th>32 bit Binary</th></tr> \r\n");
buildRow( sb, "Original",numb);
buildRow( sb, "Shift << 1",numb<<1 );
buildRow( sb, "Shift >> 1", numb>>1 );
buildRow( sb, "Shift >>> 1", numb >>> 1);
sb.append("</Table>\r\n");
return sb.toString();
}
}
i compiled my ShiftTabe.java and included the class file in the same
directory in which table1.jsp is available
but on loading table1.java i am geeting the error as
Apache Tomcat/4.0.3 - HTTP Status 500 - Internal Server Error
----------------------------------------------------------------------------
--
type Exception report
message Internal Server Error
description The server encountered an internal error (Internal Server
Error) that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSPNote:
sun.tools.javac.Main has been deprecated.
An error occurred at line: 10 in the jsp file: /table1.jsp
Generated servlet error:
C:\Program Files\Apache Tomcat
4.0\work\localhost\mywebapp\table1$jsp.java:64: Class
org.apache.jsp.ShiftTable not found.
ShiftTable tableBean = null;
^
An error occurred at line: 10 in the jsp file: /table1.jsp
Generated servlet error:
C:\Program Files\Apache Tomcat
4.0\work\localhost\mywebapp\table1$jsp.java:67: Class
org.apache.jsp.ShiftTable not found.
tableBean= (ShiftTable)
^
An error occurred at line: 10 in the jsp file: /table1.jsp
Generated servlet error:
C:\Program Files\Apache Tomcat
4.0\work\localhost\mywebapp\table1$jsp.java:72: Class
org.apache.jsp.ShiftTable not found.
tableBean = (ShiftTable)
java.beans.Beans.instantiate(this.getClass().getClassLoader(),
"ShiftTable");
^
3 errors, 1 warning
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:285)
at org.apache.jasper.servlet.JspServlet.loadJSP(JspServlet.java:552)
at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.loadIfNecessary(JspSe
rvlet.java:177)
at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.ja
va:189)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:382)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:474)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:243)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:190)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:2
46)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:170)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170
)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
1012)
at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1107
)
at java.lang.Thread.run(Thread.java:536)
----------------------------------------------------------------------------
--
Plz help me out in this as soon as possible
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