hibernate4配置文件hibernate.cfg.xml配置详解

<?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:oracle:thin:@127.0.0.1:1521:orcl</property>
    <property name="connection.username">username</property>
    <property name="connection.password">password</property>
    <!-- 数据库JDBC驱动类名 -->
    <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
    <!-- 数据库方言 -->
    <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>
    <!-- ddl语句自动建表 -->
    <property name="hbm2ddl.auto">none</property>
    <property name="show_sql">true</property>
    <property name="format_sql">true</property>
    
    <!-- 连接池配置 -->
    <property name="hibernate.connection.provider_class">
        org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider
    </property>
    <!-- 连接池中JDBC连接的最小数量。Hibernate默认为1 -->
    <property name="hibernate.c3p0.min_size">5</property>
    <!-- 连接池中JDBC连接的最大数量。Hibernate默认为100 -->
    <property name="hibernate.c3p0.max_size">20</property>
    <!-- 何时从连接池中移除一个空闲的连接（以秒为单位）时。Hibernate默认为0，永不过期 -->
    <property name="hibernate.c3p0.timeout">300</property>
    <!-- 被缓存的预编译语句数量。用来提高性能。Hibernate默认为0，缓存不可用-->
    <property name="hibernate.c3p0.max_statements">100</property>
    <!-- 一个连接被自动验证前的闲置时间（以秒为单位）。Hibernate默认为0 -->
    <property name="hibernate.c3p0.idle_test_period">3000</property>
    
    <!-- 注册ORM映射文件 -->
    <mapping class="com....." />
    
</session-factory>
</hibernate-configuration>