Unable to load class [hibernate]

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="connection.url">jdbc:postgresql://localhost:5432/postgres</property> <!-- BD Mane -->
        <property name="connection.driver_class">org.postgresql.Driver</property> <!-- DB Driver -->
        <property name="connection.username">postgres</property> <!-- DB User -->
        <property name="connection.password">10293847</property> <!-- DB Password -->
        <property name="hibernate.bytecode.use_reflection_optimizer">false</property>
        <property name="dialect">org.hibernate.dialect.PostgreSQL9Dialect</property> <!-- DB Dialect -->
        <property name="hbm2ddl.auto">update</property> <!-- create / create-drop / update -->
        
        <property name="show_sql">true</property> <!-- Show SQL in console -->
        <property name="format_sql">true</property> <!-- Show SQL formatted -->
 
<mapping class="User" package="com.javamaster.restdemo.model" resource="resource"/>
<mapping class="Order" package="com.javamaster.restdemo.model" resource="resource"/>
        
    </session-factory>
</hibernate-configuration>