CODEWITHSUNDEEP
javamysqlhibernatejavabeans
fatnjazzy
fatnjazzy

Reputation: 6152

java hibernate CLASS is not a bean


I have this simple bean name Brand.
I am able to create table out of him but i cant insert data (Mysql).
The error:

Exception in thread "main" org.hibernate.MappingException: Unknown entity: com.hibernate.beans.Brand

This is the Bean:

    package com.hibernate.beans;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class Brand {
    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    private Long brandId;
    private String name;
    private String url;


    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public Long getBrandId() {
    return brandId;
}
public void setBrandId(Long brandId) {
    this.brandId = brandId;
}
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

this is how i try to insert data (and where i get the error):

    Brand brand = new Brand();

    brand.setName("test");
    brand.setUrl("http://www.google.com");

    Session ses = new AnnotationConfiguration().configure().buildSessionFactory().getCurrentSession();
    Transaction t = ses.beginTransaction();
    ses.save(brand);
    t.commit();

this is how the table is created successfully:

AnnotationConfiguration config = new AnnotationConfiguration();
config.addAnnotatedClass(Brand.class);
config.configure();
new SchemaExport(config).create(true, true);

Upvotes: 0

Views: 378

Answers (1)

Mihai Toader
Mihai Toader

Reputation: 12243

The session factory you use to interact with the db needs to know about the entities.

In your case you need to change the code to add a Brand like this:

Brand brand = new Brand();

brand.setName("test");
brand.setUrl("http://www.google.com");

AnnotationConfiguration c = new AnnotationConfiguration();
c.addAnnotatedClass(Brand.class);
c.configure();

Session ses = c.buildSessionFactory().getCurrentSession();

Transaction t = ses.beginTransaction();
ses.save(brand);
t.commit();

Upvotes: 2

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