CODEWITHSUNDEEP
jspcdi
suganya
suganya

Reputation: 145

How to access CDI beans in JSP pages

I want to set up CDI in my existing JSF 2-Websphere application.I am using CDI Conversional scope for state saving.

I have included bean.xml in WEB-INF and annotations in my class.But still I couldnt access CDI bean inside JSP pages.can anyone provide any samples on how this be done?

Upvotes: 1

Views: 2932

Answers (3)

Kamlendu Pandey
Kamlendu Pandey

Reputation: 81

Following is an example to used an CDI @Named annotated class in JSP

class :

@RequestScoped
@Named(value = "emp")
public class Employee {

    int empno;
    String ename;
    double salary;

    public Employee() {
        this.ename="Shankar";
    }

    public int getEmpno() {
        return empno;
    }

    public void setEmpno(int empno) {
        this.empno = empno;
    }

    public String getEname() {
        return ename;
    }

    public void setEname(String ename) {
        this.ename = ename;
    }

    public double getSalary() {
        return salary;
    }

    public void setSalary(double salary) {
        this.salary = salary;
    }


}

Now the JSP Fragment to use this class

 <%@page contentType="text/html" pageEncoding="UTF-8"%>

 <!DOCTYPE html>
 <html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <NoAutoGeneratedIdViewHandlertitle>JSP Page</title>
    </head>
    <body>

        <h1>Hello World!</h1>

        ${emp.ename}
    </body>
 </html>

This @Named annotated classes can be used in EL in JSP

Hope this satisfies you. Pl. ask for any clarification

Upvotes: 1

Gas
Gas

Reputation: 18020

It works fine in WebSphere 8.5.5. You need to annotate class with @Named("yourName") and usually with some scope related annotation.
Then you can access your bean in plain jsp using EL like this: ${yourName.property}

Upvotes: 1

Charlee Chitsuk
Charlee Chitsuk

Reputation: 9059

The Weld home page mentions as

For Servlet Containers (Tomcat/Jetty) or Java EE 5 Application Servers:

<dependency>
    <groupId>org.jboss.weld.servlet</groupId>
    <artifactId>weld-servlet</artifactId>
    <version>1.1.10.Final</version>
</dependency>

The 18.3. Servlet containers (such as Tomcat or Jetty) also told us as

While JSR-299 does not require support for servlet environments, Weld can be used in a servlet container, such as Tomcat 6.0 or Jetty 6.1.

Weld can be used as a library in an web application that is deployed to a Servlet container. You should place weld-servlet.jar within the WEB-INF/lib directory relative to the web root. weld-servlet.jar is an "uber-jar", meaning it bundles all the bits of Weld and CDI required for running in a Servlet container, for your convenience. Alternatively, you can use its component jars. A list of transitive dependencies can be found in the META-INF/DEPENDENCIES.txt file inside the weld-servlet.jar artifact.

Firstly we also need to explicitly specify the servlet listener (used to boot Weld, and control its interaction with requests) in WEB-INF/web.xml in the web root:

<listener>
   <listener-class>org.jboss.weld.environment.servlet.Listener</listener-class>
</listener>

I hope this may help.

Upvotes: 1

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