Hi Friends, There are to way for mapping of our java object to database..

Using annotation..

package net.roseindia.Model;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "userinfo")
public class AddInformation implements Serializable {
    private String firstname;
    private int id;

    @Id
    @GeneratedValue
    @Column(name = "id")
    public int getId() {
        return id;
    }

    @Column(name = "firstname")
    public String getFirstname() {
        return firstname;
    }


    public void setFirstname(String firstname) {
        this.firstname = firstname;
    }

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

}

By using hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping auto-import="true" default-lazy="true">
    <class name="net.roseindia.model.EmployeeInfoModel" table="employeeinfo">
        <id name="id" column="id" type="java.lang.Integer">
            <generator class="increment" />
        </id>
        <property name="name" column="name" type="java.lang.String" />
        <property name="address" column="address" type="java.lang.String" />
    </class>
</hibernate-mapping>