entityManager.createQuery("SELECT u FROM PlantEntity u order by idPlant").setFirstResult(0).setMaxResults(10).getResultList();

Session hs = (Session) entityManager.getDelegate();
Criteria c = hs.createCriteria(PlantEntity.class,"plant");
c.setMaxResults(Integer.parseInt(length));
c.setFirstResult(Integer.parseInt(start));
c.list();

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">

    <persistence-unit name="NewPersistenceUnit">
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>

        <class>it.ciro.model.PlantEntity</class>
        <class>it.ciro.model.SegmentEntity</class>
        <class>it.ciro.model.PlanningEntity</class>
        <properties>
            <property name="hibernate.connection.url" value="jdbc:postgresql://94.23.66.103:5432/db"/>
            <property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
            <property name="hibernate.connection.username" value="xxxx"/>
            <property name="hibernate.connection.password" value="xxxxx"/>
            <property name="hibernate.archive.autodetection" value="class"/>
            <property name="hibernate.format_sql" value="true"/>
            <property name="hibernate.connection.useUnicode" value="true" />
            <property name="hibernate.connection.characterEncoding" value="UTF-8" />
            <property name="hbm2ddl.auto" value="validate"/>
            <property name="hibernate.c3p0.min_size" value="5" />
            <property name="hibernate.c3p0.max_size" value="20" />
            <property name="hibernate.c3p0.timeout" value="60" />
            <property name="hibernate.c3p0.max_statements" value="50" />
            <property name="hibernate.c3p0.idle_test_period" value="90" />
            <property name="hibernate.c3p0.preferredTestQuery" value="SELECT 1" />
            <property name="hibernate.c3p0.testConnectionOnCheckout" value="true" />
        </properties>
    </persistence-unit>
</persistence>