使用Hibernate，Tomcat 6，JEE5生成实体

package pass.entities;

import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

@Entity
@Table(catalog = \"pass2\")
@SequenceGenerator(allocationSize=1, 
            initialValue=1, 
            sequenceName = \"AL_seq\", 
            name =\"AL_gen\")
public class AnoLectivo implements Serializable{

    private static final long serialVersionUID = -2663573189740765100L;

    @Id
    @GeneratedValue(generator=\"AL_gen\")
    private int ent_id;

    private String id;

    /...
}

<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<persistence version=\"2.0\" xmlns=\"http://java.sun.com/xml/ns/persistence\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd\">
    <persistence-unit name=\"AnoLectivoSrv\" transaction-type=\"RESOURCE_LOCAL\">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <class>pass.entities.AnoLectivo</class>
        <class>test.Test</class>
        <exclude-unlisted-classes>true</exclude-unlisted-classes>
        <properties>
            <property name=\"javax.persistence.jdbc.url\" value=\"jdbc:postgresql:postgres\"/>
            <property name=\"javax.persistence.jdbc.user\" value=\"postgres\"/>
            <property name=\"javax.persistence.jdbc.password\" value=\"admin\"/>
            <property name=\"javax.persistence.jdbc.driver\" value=\"org.postgresql.Driver\"/>
            <property name=\"hibernate.hbm2ddl.auto\" value=\"create-drop\"/>
            <property name=\"hibernate.dialect\" value=\"org.hibernate.dialect.PostgreSQLDialect\"/>
        </properties>
    </persistence-unit>
</persistence>