Using java class files in JSP

hi everyone,
i am trying to import a java file in a JSP page..
how do i do this???

hi,
<%@page import="yourpackagename.*" %>
or
<%@page import="yourpackagename.classname" %>

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i have a java package which reads values from property file. i have imported the package.classname in jsp file and also i have created an object for the class file like
classname object=new classname();
now iam able to access only the methods defined in the class but not the variables. i have defined connection properties in class file.
in jsp i need to use
statement=con.createstatement(); but it shows variable not declared.
con is declared in java class file.
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thanks

here is the code
* testbean.java
* Created on October 31, 2006, 12:14 PM
package property;
import java.beans.*;
import java.io.Serializable;
public class testbean extends Object implements Serializable {
public String sampleProperty="test2";
public String getSampleProperty() {
return sampleProperty;
}jsp file
<%@ page contentType="text/html;charset=windows-1252"%>
<%@ page import="java.sql.*,java.util.*"%>
<html>
<head>
<title>Schedule Details</title>
</head>
<jsp:useBean id="ConProp" class="property.testbean"/>
<body>
Messge is : <jsp:getProperty name="msg" property="sampleProperty"/>
<%
out.println(ConProp.sampleProperty);
%>
</body>
</html>out.println(ConProp.sampleProperty) prints null value.
is this the right procedure to access bean variables
thanks

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I'm trying to load a java class file from a jsp page.
(e.g. MyFile.java <-- Source "MyFile.class<--Class file of MyFile.java")
jsp page
<%@ include file = "MyFile.class" %>
<HTML> // HTML Tags are here
MyFile.java
A normal java source file that has "public static void main" in it.
My jsp page can display it's contents, 'except' for showing e.g. "1235%%215648%%public%%$$@##" through out the page...
My guess is that it can't display my java class file..
Can anyone please help me solve this problem of mine ?
Thanks in advance : )
Yours Sincerely,
RainbowEnergies

This is my JSP file.
<HTML>
<HEAD>
<TITLE>Activity Games</TITLE>
</HEAD>
<%
String name = "";
String id = "";
name = session.getAttribute("name").toString();
session.setAttribute("name",name);
id = session.getAttribute("id").toString();
session.setAttribute("id",id);
%>
<BODY bgcolor="#cc99ff" text="#000000" link="#E3E3E3" vlink="#CCCCCC" alink="#FF0000">
<H3><%=name%>, you have enter Activity Games</H3>
<%@ page import="Games.Lufia.*" %>
<%Lufia lufia = new Lufia();%>
</BODY>
</HTML>
After I execute...
An error occurred at line: 18 in the jsp file: /jsp/ActivityGames.jsp
error: File C:\Program Files\Apache Tomcat 4.0\webapps\website\WEB-INF\classes\Games\Lufia\Lufia.class does not contain type Games.Lufia.Lufia as expected, but type Lufia. Please remove the file, or make sure it appears in the correct subdirectory of the class path.
Generated servlet error:
C:\Program Files\Apache Tomcat 4.0\work\Standalone\localhost\website\jsp\ActivityGames$jsp.java:85: Class Games.Lufia.Lufia not found.
Lufia lufia = new Lufia();
But if I comment this out....
This is my JSP file.
<HTML>
<HEAD>
<TITLE>Activity Games</TITLE>
</HEAD>
<%
String name = "";
String id = "";
name = session.getAttribute("name").toString();
session.setAttribute("name",name);
id = session.getAttribute("id").toString();
session.setAttribute("id",id);
%>
<BODY bgcolor="#cc99ff" text="#000000" link="#E3E3E3" vlink="#CCCCCC" alink="#FF0000">
<H3><%=name%>, you have enter Activity Games</H3>
<%@ page import="Games.Lufia.*" %>
<%//Lufia lufia = new Lufia();%> <--- comment this out.... (HERE)
</BODY>
</HTML>
The page shows but did not run my java class file..
Thanks again for trying to help me solve this problem of mine. : - )
Regards,
RainbowEnergies

Can It Be Done? - Using Java Class Files from a DB

Hello,
I am interested in storing a binary java class file in my oracle DB. Then I want to get it out at runtime and execute methods on it. I am planning on casting the object to an interface and executing the methods within. Please let me know if this is possible and where to look for more info, and a code example would be awesome.
Joe
[email protected]

I think you are going to need to serialize the objects and the classes. (Don't get stuck on semantics here, I don't mean use Java Serialization to write the Class instance, I am referring to writing the .class file to a field in the database.) Obviously the instances are what you are interested in (since you mentioned casting them to interfaces and invoking methods on them), but the class definitions will need to either be available already, or stored elsewhere in the database.

How can i call java class file in jsp page

Hai,
i wants to call .class file in jsp page.
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Thanks

I'm not entirely sure what you mean by "calling a class file", but I'm going to assume that you want to do something like the following in your page:
<%
MyClass myClass = new MyClass();
myClass.someMethod();
%>etc
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How to call java class file from jsp

hi
we need to call java classes (which are written separately in .java file )from jsp file. we need it for our project if anyone knows about please reply us.
bye
siva sankari

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<%@ page import="package.class"%> and then inside instantiate an object
<%
MyClass mc = new MyClass(parameters if any);
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Call java class file into jsp file

Hello experts,
I wrote a class file which have validation functions it successfully created a class file of that java file.
and I puted that class file into tomcat's ../WEB-INF/classes folder.
And whenever I am going to execute the jsp page it give error like
"regexFunctions cannot be resolved to a type"
My class file is like follows,
import java.util.regex.*;
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Put it into a package. Classes in packages can't access classes with no package, since about 2003.

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Hi,
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hey there,
i am trying to set up tomcat 5.5 on my computer at home and have sucessfully done so. i have been trying to use Java classes inside my JSP files however tomcat thows an internal servlet error as follows:
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 144 in the jsp file: /order.jsp
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An error occurred at line: 144 in the jsp file: /order.jsp
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eg
package com.mypackage
public class MyClass ...
once compiled would go into WEB-INF/classes/com/mypackage/MyClass.class
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Editor fails to close a java class file.

jdev 10.1.3.4
Even if I click the X on the editor tab, jdev editor does not close the file.
File-->Close does not close the file either.
File-->Close All closes all files, however.
Instead of closing the file, it just jumps to the next file in the editor.
This has been happening to me for a some time, and it happens with Java class files only.
jsp or xml files do close no problem.
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Thanks for your help.
Edited by: Yunki on Jan 7, 2009 2:54 PM

Hi,
since this doesn't reproduce on other machines, please let us know how this can be reliably reproduced
Frank

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can any one help me

java files
import org.w3c.dom.*;
import javax.servlet.http.*;
import javax.xml.transform.*;
import javax.xml.transform.stream.*;
import java.io.*;
public class XmlParser
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String strXML= "employee.xml";
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Using java classes in jsp

hi everybody
I'm using Apache Tomcat 5.5.7 and I want to develop very very simple jsp-files.
I have a java class file called MyClass.
When I start the jsp file with the code line
MyClass class = new MyClass();
I get this error: MyClass cannot be resolved or is not a type
As I know the hierachy must be the following:
ProjectRoot/WEB-INF/classes/MyClass.class
ProjectRoot/start.jsp
In the java class the Constructor is empty... so I cannot see why this should make a problem. I also tried to put the class file into a package and import the package. I had the same error then.
I read something about the web.xml file which should be in the WEB-INF directory.
will this help me... and if yes, what do I need to write into it?
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Cheers
alex

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2 - in your jsp you include the line
<%@ page import="com.mypackage.MyClass" %>
<%
MyClass myClass = new MyClass();
%>
3 - Also note that "class" is a reserved word in java, and can not be used as a variable identifier.
4 - Yes you most probably should have a web.xml file in the WEB-INF directory.
Look under the webbapps/ROOT/WEB-INF for a basic example.
Cheers,
evnafets

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Hi
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Unable to import a java class in a jsp file

Hi,
I am trying to import a java class in my jsp.
------------------jsp---------------
<jsp:useBean id="form" class="com.company.portlets.searchApps.object.SearchOBJ" scope="request" />
<jsp:setProperty name="form" property="*" />
<input type="TEXT" name="projectID" value='<%= form.getProjectID() %>'>
When I run the above JSP, it says that class 'com.company.portlets.searchApps.object.SearchOBJ' cannot be found.
Why?
My project structure looks like this:
Project
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++com.company.portlets.searchApps.object
+++SearchOBJ.java
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++htdocs
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++++SearchAppsPortletShowPage.jsp
++WEB-INF
+++index.jsp
+Resources
++SearchApps.deploy
Please advice...thanks!

The way that JDeveloper organized the files was like this:
C:\jdev1012\jdev\mywork\WksSearchApps\Project\classes\com\company\portlets\searchAPPS\object\SearchOBJ.class
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Using java class files in JSP

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