数据库访问 hibernate

<!DOCTYPE hibernate-configuration SYSTEM"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><hibernate-configuration><session-factory><property name="hibernate.connection.driver_class">org.apache.derby.jdbc.EmbeddedDriver</property><property name="hibernate.dialect">org.hibernate.dialect.DerbyDialect</property><property name="hibernate.hbm2ddl.auto">update</property><!-- Use the C3P0 connection pool provider --><property name="hibernate.c3p0.min_size">1</property><property name="hibernate.c3p0.max_size">2</property><property name="hibernate.c3p0.timeout">100</property><property name="hibernate.c3p0.max_statements">50</property><property name="hibernate.c3p0.idle_test_period">300</property><!-- Show and print nice SQL on stdout --><property name="show_sql">false</property><property name="format_sql">false</property></session-factory></hibernate-configuration>