Accessing java class in JSP on Tomcat 5.5 server

Just i want to use a java class in JSP.
Explanation in following steps :
a. MY JSP Code - SimpleBean.jsp
b. My Java file - test.java
c. Path ( Root, jdk, jre , myfiles-test.java, SimpleBean.jsp )
d. Environment Variables
e. Error Message faced
Now Brief explanation.
a. MY JSP Code :
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*,test" errorPage="" %>
<td>
<%! test obj = new test();
obj.setAge(32); %>
<%= obj.getAge(); %>
</td>
b. My Java file - test.java
package test;
class test
private int age;
public int getAge()
     return age;
     public void setAge(int intage)
          this.age = intage;
c. Path ( Root, jdk, jre , myfiles-test.java, SimpleBean.jsp )
Tomcat Root : c:\Program Files\apache\tomcat5.5\webapps\ROOT
jdk : C:\Program Files\Java\jdk1.5.0\bin;
jre : C:\Program Files\Java\jre1.5.0\bin;
test.java : c:\Program Files\apache\tomcat5.5\webapps\ROOT\NRMS\test\test.java
SimpleBean.jsp : c:\Program Files\apache\tomcat5.5\webapps\ROOT\NRMS\test\SimpleBean.jps
d. Environment Variables :
PATH :
C:\Program Files\Java\jdk1.5.0\bin; C:\Program Files\Java\jre1.5.0\bin;
CLASSPATH :
.;C:\Program Files\Java\jre1.5.0\bin;
e. Error Message Faced : ( on accessing url http://localhost:8080/NRMS/SimpleBean.jsp )
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
The import test cannot be resolved
An error occurred at line: 26 in the jsp file: /NRMS/test/SimpleBean.jsp
Generated servlet error:
test cannot be resolved (or is not a valid type) for the field SimpleBean_jsp.obj
An error occurred at line: 26 in the jsp file: /NRMS/test/SimpleBean.jsp
Generated servlet error:
test cannot be resolved or is not a type
An error occurred at line: 26 in the jsp file: /NRMS/test/SimpleBean.jsp
Generated servlet error:
Syntax error on token(s), misplaced construct(s)
An error occurred at line: 26 in the jsp file: /NRMS/test/SimpleBean.jsp
Generated servlet error:
Syntax error on token "32", delete this token
An error occurred at line: 28 in the jsp file: /NRMS/test/SimpleBean.jsp
Generated servlet error:
Syntax error on token ";", delete this token
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
     org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:389)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:296)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.4 logs.
Apache Tomcat/5.5.4
Please explain where i am doing the mistake.
Thanks in advance.
Regards,
Lax.

>
<%@ page contentType="text/html; charset=iso-8859-1"
language="java" import="java.sql.*,test" errorPage=""
%>Your class is test.test.The compiler wouldnt know what test is from your import.
Change import as
java.sql.*,test.test
<%! test obj = new test();
obj.setAge(32); %>The symbol '!' ?

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If my application has so many java classes under WEB-INF/classes/ without creating package, it may be so inconvenience.
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Zin Ko Win

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public class FruitMap extends java.util.HashMap{}
I saved FruitMap.java file <tomcat-install>\webapps\ROOT\Web-Inf\classes and executed javac FruitMap.java command.
FruitMap.class was created succussfuly.
I stop and restart the Tomcat server.
The jsp file fruitPrice.jsp is following:(only first a few lines pertain to my question).
<%@ page import="java.util.*" %>
<%
String selectedFruit = request.getParameter("selectedFruit");
if (selectedFruit == null) {
selectedFruit = "apples";
%>
<jsp:useBean id="fruitList" class ="FruitMap">
<%
fruitList.put("apples","2.99");
fruitList.put("oranges","2.59");
fruitList.put("plums","3.99");
%>
</jsp:useBean>
<html>
<head>
<title>Fruit Price Calculation</title>
<SCRIPT language="JavaScript">
price = parseFloat(<%=fruitList.get(selectedFruit)%>);
function submitForm() {
document.fruitForm.submit();
function roundNumber(number, digits){
return Math.round(number*Math.pow(10,digits))/Math.pow(10,digits);
function calcTotal() {
document.fruitForm.total.value = roundNumber(price*parseInt(document.fruitForm.quantity.value),2);
</SCRIPT>
</head>
<body onload="calcTotal()">
<h1>Fruit Price Calculation</h1>
To change the fruit, select a different fruit from the list.<br>
To calculate the total price for the fruit you select, enter the number of pounds you would like, and hit the tab key on your keyboard.
<form method="POST" name="fruitForm">
<table border="1" cellpadding="3">
<tr align="left" valign="top">
<th bgcolor="#c0c0c0">Fruit Type</th>
<td>
<select name="selectedFruit" onchange="submitForm();">
<%
Iterator fruitNames = fruitList.keySet().iterator();
while (fruitNames.hasNext()) {
String newFruit = (String)fruitNames.next();
out.print("<option value='" + newFruit + "' ");
if (selectedFruit.equals(newFruit)){
out.print(" Selected ");
out.print(">" + newFruit);
%>
</select>
</td>
</tr>
<tr>
<th bgcolor="#c0c0c0"">Price($):</th>
<td><input type="text" size="15" name="price" disabled readonly value="<%= fruitList.get(selectedFruit) %>"</td>
</tr>
<tr>
<th bgcolor="#c0c0c0">Pounds:</th>
<td><input type="text" size="15" name="quantity" value="1" onchange="calcTotal();"></td>
</tr>
<tr>
<th bgcolor="#c0c0c0">Total($): </th>
<td><input type="text" size="15" name="total" disabled readonly value="" ></td>
</tr>
</table>
</form>
</body>
</html>
When run the page by enter http://localhost:8080/fruitPrice.jsp
I got these errors:
Error: 500
Location: /fruitPrice.jsp
Internal Servlet Error:
org.apache.jasper.JasperException: Unable to compile class for JSPC:\jakarta-tomcat-3.2.3\work\localhost_8080\_0002ffruitPrice_0002ejspfruitPrice_jsp_0.java:75: Class java.util.HashMap not found in cast.
fruitList= (FruitMap)
^
C:\jakarta-tomcat-3.2.3\work\localhost_8080\_0002ffruitPrice_0002ejspfruitPrice_jsp_0.java:75: Invalid cast from java.lang.Object to FruitMap.
fruitList= (FruitMap)
^
C:\jakarta-tomcat-3.2.3\work\localhost_8080\_0002ffruitPrice_0002ejspfruitPrice_jsp_0.java:80: Class java.util.HashMap not found in cast.
fruitList = (FruitMap) Beans.instantiate(this.getClass().getClassLoader(), "FruitMap");
^
C:\jakarta-tomcat-3.2.3\work\localhost_8080\_0002ffruitPrice_0002ejspfruitPrice_jsp_0.java:80: Invalid cast from java.lang.Object to FruitMap.
fruitList = (FruitMap) Beans.instantiate(this.getClass().getClassLoader(), "FruitMap");
^
Why the FruitMap class is not recognized? I am using Tomcat 3.2.3 .

Hi silverbullet,
U haven't imported the class FruitMap at the top of the JSP, import it and I think it should work.
eg ..
if FruitMap class has the default package then
<%@ page import="FruitMap" %>
And another thing, just for sharing........u don't have to import java.lang.* and java.util.* in JSP, they are imported by default..........
Chandan.

Java Classes in JSP

I'd like to use some of my java classes from my JSP pages, how do I do
          this?
          ie: I have a class
          public class Test
          public static void uselessFunx()
          //do nothing
          How would I get access to the Test class and call uselessFunx()?
          Thanx.


Good point Toad. That is a loaded question!
          If you do want to 'hack' in your classes, then you should
          A) Use the PAGE directive to import the class package into your JSP <%@ page
          import="mypackages.myclasses.*" %>
          B) Instantiate the class using a scriptlet <% Test myTest = new Test(); %>
          C) Reference the class from a scriptlet <% String result =
          myTest.uselessFunx(); %>
          D) You can output results referencing these new variables using <%= result
          %>
          Make sure you're using packages. Otherwise you'll have great difficulty
          convincing the JSP that it's in the same package as your class.
          "Toad" <[email protected]> wrote in message
          news:[email protected]...
          > This is a loaded question. I would recommend using custom actions (tags)
          or
          > the built-in jsp:usebean tag. Though not recommended you can also
          > instantiate a class inside a sniplet. If these are unfamiliar topics
          > definitely consider reading an introductory JSP article or two.
          >
          > "S D" <[email protected]> wrote in message
          > news:[email protected]...
          > > I'd like to use some of my java classes from my JSP pages, how do I do
          > > this?
          > >
          > > ie: I have a class
          > >
          > > public class Test
          > > {
          > > public static void uselessFunx()
          > > {
          > > file://do nothing
          > > }
          > > }
          > >
          > > How would I get access to the Test class and call uselessFunx()?
          > >
          > > Thanx.
          >
          >

Accessing java class in JSP on Tomcat 5.5 server

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