problem with EL

[mark smith]

hi

in a servlet i do

Member member = new Member();
member.setName(request.getParameter("name"));
request.getSession().setAttribute("beanID",member);

in the jsp, i do

<jsp:useBean id="beanID"  scope="session" class="moreservlet.Member" />
<jsp:getProperty name="beanID" property="name" />

that work fine...

i work like to use EL now...

i tried

<jsp:useBean id="beanID"  scope="session" class="moreservlet.Member" />
${beanID.name};

but only ; is displayed...

any idea?

thanks

[Bear Bibeault]

As per forum instructions, what version of JSP?

[mark smith]

i use netbeans 5 and java 1.5
if i check the jsp netbeans created.... there are some comment who talk about release 1.1

[Ben Souther]

Netbeans is an IDE, not a servlet container.
Find out what version of JSP the embedded container (Tomcat) supports.

[Bear Bibeault]

Indeed.

And if it turns out that your JSP version is indeed 1.1, then it's much too antiquated to even think about uaing the EL.

If so, you'll need to upgrade to Tomcat 5 which supports JSP 2.0.

The JSP FAQ covers this and how to set up your web.xml properly once you've updated your Tomcat version.
[ September 11, 2006: Message edited by: Bear Bibeault ]

[mark smith]

netbeans use tomcat 5.5 maybe the comment is just a warning to said we support min 1.1 release...

[Bear Bibeault]

Then be sure that your web.xml is set up using the Servlets 2.4 Schema rather than the Servlets 2.3 DOCTYPE. You'll find instructions in the JSP FAQ.

Then try something simple to make sure that the EL is enabled. Something like:

3 + 4 = ${3+4}

and see if it emits 7. If so, the EL is ok and your problem may lie elsewhere.

[mark smith]

Originally posted by Bear Bibeault:
Then be sure that your web.xml is set up using the Servlets 2.4 Schema rather than the Servlets 2.3 DOCTYPE. You'll find instructions in the JSP FAQ.

Then try something simple to make sure that the EL is enabled. Something like:

3 + 4 = ${3+4}

and see if it emits 7. If so, the EL is ok and your problem may lie elsewhere.

ya i see 7

[Bear Bibeault]

OK. good. That eliminates setup issues as a possible suspect (which is usually the problem 90% of the time).

Now, we employ basic debugging techniques.

Place the getproperty version and the EL version side-by-side on the page. Do they yield the same output?

If not, I'd next suspect bean structure issues. The EL is very picky about properly formatted beans. Post your bean code.

[mark smith]

Originally posted by Bear Bibeault:
OK. good. That eliminates setup issues as a possible suspect (which is usually the problem 90% of the time).

Now, we employ basic debugging techniques.

Place the getproperty version and the EL version side-by-side on the page. Do they yield the same output?

If not, I'd next suspect bean structure issues. The EL is very picky about properly formatted beans. Post your bean code.

i don't really understand the getproperty and the EL version...


the javabean code

package moreservlet;
import java.beans.*;
import java.io.Serializable;
 
public class Member extends Object implements Serializable {
    
    private String name;
    private String lastname
    private String username;
    private String password;
    
    public Member() {
    }
   
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name= name;
    }
 
    public String getLastName() {
        return lastname;
    }
 
    public void setLastName(String lastname) {
        this.lastname = lastname;
    }
 
    public String getUserName() {
        return username;
    }
 
    public void setUserName(String username) {
        this.username = username;
    }
 
    public String getPassword() {
        return password;
    }
 
    public void setPassword(String password) {
        this.password = password;
    }   
}
 

[Bear Bibeault]

At first glance, your bean looks fine.

Originally posted by mark smith:

i don't really understand the getproperty and the EL version...

Place both notations on the page and see what you get.

[mark smith]

work fine now

to use bean in the jsp, does i always need to use

request.getSession().setAttribute("beanID",member);

in the servlet?

[Bear Bibeault]

If a bean of that name does not already exist, and you use class= on the useBean action, it will create a bean of that type using the default constructor.