Java Hibernate : org.hibernate.MappingException: Unknown entity

Question

i have a problem using hibernate with my java project and i hope that you can help me:

First, here is some of my code:
The Entity class

package de.zaed.entities;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;

@Entity
@Table(name="USER")
public class User {

/**
 * the user id in the database
 */
@Id
private Long id; 

/**
 * the username of a user
 */
private String username;

/**
 * the users password
 */
private String password;

/**
 * The role of a user
 */
@OneToOne(mappedBy="user", cascade=CascadeType.ALL)
private UserRole role;


public Long getId() {
    return id;
}

public String getPassword() {
    return password;
}

public UserRole getRole() {
    return role;
}

public String getUsername() {
    return username;
}

public void setId(Long id) {
    this.id = id;
}

public void setPassword(String password) {
    this.password = password;
}

public void setRole(UserRole role) {
    this.role = role;
}

public void setUsername(String username) {
    this.username = username;
}   
}

the part where i add the class to the AnnotationConfiguration

config.addAnnotatedClass(User.class); 
config.addAnnotatedClass(UserRole.class); 
config.configure("hibernate.cfg.xml");

now my problem:
while executing the following code:

User dbUser = new User();
dbUser.setUsername(username);
dbUser.setPassword(password);

Session session = DatabaseService.getSessionFactory().getCurrentSession();
session.beginTransaction();

session.save(dbUser);

session.flush();

session.close();

I get the

org.hibernate.MappingException: Unknown entity: de.zaed.entities.User

error while session.save(dbUser) is called.

I've read many posts in forums and some tutorials but i could not find a fix for my problem. Hope you can help me.

Thanks, kaQn4p

show us your hibernate.cfg.xml – Sajan Chandran Jan 18 '13 at 12:25 — Sajan Chandran, Jan 18 '13 at 12:25
Could you please provide the version of Hibernate? – Shashi Jan 18 '13 at 12:28 — Shashi, Jan 18 '13 at 12:28

score 0 · Answer 1 · answered Jan 18 '13 at 12:23

0

There is no mapping for username and password in the User Class. You have to define annotation @Column e.g.

@Column(name = "username") private String username;

@Column(name = "password") private String password;

Assuming, the column defined in table User is same as the field defined in the User class. The column name is defined in name field of Column Annotation

answered Jan 18 '13 at 12:23

Shashi

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there is no need for you to define the column annotation, by default hibernate will use the variable name as the column name. – Sajan Chandran Jan 18 '13 at 12:26

Java Hibernate : org.hibernate.MappingException: Unknown entity

1 Answers1