Spring beans.xml 經典配置模板：註解驅動、C3P0 數據源、Hibernate 3 Annotation、AOP 聲明式事務

Spring beans.xml 經典配置模板：註解驅動、C3P0 數據源、Hibernate 3 Annotation、AOP 聲明式事務

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="https://www.springframework.org/schema/beans"
       xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="https://www.springframework.org/schema/context"
       xmlns:aop="https://www.springframework.org/schema/aop"
       xmlns:tx="https://www.springframework.org/schema/tx"
       xsi:schemaLocation="
         https://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans-2.5.xsd
         https://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context-2.5.xsd
         https://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx-2.5.xsd
         https://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">

  <!-- 1. 開啟註解掃描與 AOP -->
  <context:annotation-config/>
  <context:component-scan base-package="com.hkwy"/>
  <aop:aspectj-autoproxy/>

  <!-- 2. C3P0 數據源 -->
  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://localhost:3306/spring1"/>
    <property name="username" value="root"/>
    <property name="password" value="root"/>
    <property name="initialSize" value="1"/>
    <property name="maxActive" value="500"/>
    <property name="maxIdle" value="2"/>
    <property name="minIdle" value="1"/>
    <property name="maxWait" value="1000"/>
  </bean>

  <!-- 3. Hibernate 3 Annotation SessionFactory -->
  <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="packagesToScan" value="com.hkwy.entity"/>
    <property name="hibernateProperties">
      <props>
        <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
        <prop key="hibernate.show_sql">true</prop>
        <prop key="hibernate.format_sql">true</prop>
        <prop key="hibernate.hbm2ddl.auto">update</prop>
      </props>
    </property>
  </bean>

  <!-- 4. 事務管理器 + AOP 聲明式事務 -->
  <bean id="txmanager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory"/>
  </bean>

  <aop:config>
    <aop:pointcut expression="execution(* com.hkwy.dao.*.*(..))" id="aoph"/>
    <aop:advisor advice-ref="txadvice" pointcut-ref="aoph"/>
  </aop:config>

  <tx:advice id="txadvice" transaction-manager="txmanager">
    <tx:attributes>
      <tx:method name="*" propagation="REQUIRED"/>
    </tx:attributes>
  </tx:advice>

</beans>

關鍵點速記

• 註解掃描：context:component-scan 替代繁瑣 Bean 定義。
• AnnotationSessionFactoryBean：packagesToScan 自動發現 @Entity，無需 .hbm.xml。
• AOP 切點：execution(* com.hkwy.dao.*.*(..)) 精準切 DAO 層，Service 層同理。
• 事務屬性：propagation="REQUIRED" 滿足大多數業務，查詢類可單獨配 read-only="true"。

升級提示

Spring 3.1+ 建議改用 spring-beans-3.2.xsd、Hibernate 4/5 遷移至 LocalSessionFactoryBean + hibernate4/5 包，C3P0 推薦換 HikariCP 或 Druid。