SIMPLE: How do I use jbeans in jsp files???

[yiannakop]

Hi everyone. I've been trying to use beans in my jsp files and always sth goes wrong. I am using Sun One Studio 4 IDE. Here's what excactly I do:
1. I've created a new web module
2. I've created file called dataBase.java (java bean) which does some simple sql queries.
3. I've used the above bean in a Jsp file.
When I execute the jsp file I get the following server error from apache:

java.lang.NoClassDefFoundError: IIHS_WEB/dataBase
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:1590)
...
...

I've read that the classes and beans have to be stored in the /class directory of the WEB_INF folder. I've done this, but still nothing...
Any ideas???
Please help!!! :sick:

[Davey]

Does you class have a public no argument constructor, ie is it really a bean?

[yiannakop]

Yes it does. Sun one studio automatically creates such a bean:

/*
* test.java
*
* Created on 30 Σεπτέμβριος 2004, 10:21 μμ
*/

package IIHS_WEB;

import java.beans.*;

/**
*
* @author Theodore G
*/
public class test extends Object implements java.io.Serializable {

private static final String PROP_SAMPLE_PROPERTY = "SampleProperty";

private String sampleProperty;

private PropertyChangeSupport propertySupport;

/** Creates new test */
public test() {
propertySupport = new PropertyChangeSupport( this );
}

public String getSampleProperty() {
return sampleProperty;
}

public void setSampleProperty(String value) {
String oldValue = sampleProperty;
sampleProperty = value;
propertySupport.firePropertyChange(PROP_SAMPLE_PROPERTY, oldValue, sampleProperty);
}


public void addPropertyChangeListener(PropertyChangeListener listener) {
propertySupport.addPropertyChangeListener(listener);
}

public void removePropertyChangeListener(PropertyChangeListener listener) {
propertySupport.removePropertyChangeListener(listener);
}

}


Any ideas? It has to do with placing the .class in the correct directory. Any ideas??

Thanx a lot for helping me Davey.

[Davey]

Have you put this class in as WEB-INF/classes/IIHS_WEB/test.class.

Note, it must go in a "classes" directory , not a "class" directory. Also, the class directory hierarchy is case sensitive.

[yiannakop]

Have you put this class in as WEB-INF/classes/IIHS_WEB/test.class.

Note, it must go in a "classes" directory , not a "class" directory. Also, the class directory hierarchy is case sensitive.

Ok I found it davey. I found a tutorial about jsp and specific about using sun one studio. Indeed the directory naming is case sensitive and (for some strange reason...) I had changed the Classes dir. to classes :mad: . Anyway, I've learnt that to use a class you must "include" it in a package which must also be placed in the /Classes directory. Anyway, even if I hadn't found it, your answer would be 100% helpful for me so thank you very much. :wave: