今天犯了一个愚蠢的错误

今天犯了一个愚蠢的错误

由于要写一个Spring的培训教材，要做Spring的事务样例，于是开始写样例，写好了一测，控制台有SQL输出，数据库却查询不到数据，查亚查亚，花了一个多小时，原来是获取的Service不是经过代理的Service，自然事务不起作用，数据库里就没有数据了，鄙视一下自己。

配置文件样例如下（已经修改了dao和service的命名，减少了写错的可能性，以后命名问题一定要注意）：

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

    < context:annotation-config />
    < context:component-scan base-package ="com.*"   />

    < bean id ="sessionFactory"  
            class ="org.springframework.orm.hibernate3.LocalSessionFactoryBean" >  
        < property name ="configLocation" value ="classpath:hibernate.cfg.xml"   />  
        < property name ="configurationClass" value ="org.hibernate.cfg.AnnotationConfiguration"   />
    </ bean >  

    <!-- 定义事务管理器（声明式的事务） -->  
    < bean id ="transactionManager"
        class ="org.springframework.orm.hibernate3.HibernateTransactionManager" >
        < property name ="sessionFactory" ref ="sessionFactory"   />
    </ bean >
   
    <!-- 配置DAO -->
    < bean id ="generatorDaoTarget" class ="com.*.spring.dao.GeneratorDaoImpl" >
        < property name ="sessionFactory" ref ="sessionFactory"   />
    </ bean >
   
    < bean id ="generatorDao"  
        class ="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" >  
        <!-- 配置事务管理器 -->  
        < property name ="transactionManager" >< ref bean ="transactionManager"   /></ property >  
        < property name ="target" >< ref bean ="generatorDaoTarget"   /></ property >  
        < property name ="proxyInterfaces" >< value > com.*.spring.dao.GeneratorDao </ value ></ property >
        <!-- 配置事务属性 -->  
        < property name ="transactionAttributes" >  
            < props >  
                < prop key ="*" > PROPAGATION_REQUIRED </ prop >
            </ props >  
        </ property >  
    </ bean >  

    < bean id ="plantDaoTarget" class ="com.*.spring.dao.PlantDaoImpl" >
        < property name ="sessionFactory" ref ="sessionFactory"   />
    </ bean >
   
    < bean id ="plantDao"  
        class ="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" >  
           <!-- 配置事务管理器 -->  
        < property name ="transactionManager" >< ref bean ="transactionManager"   /></ property >     
        < property name ="target" >< ref bean ="plantDaoTarget"   /></ property >  
        < property name ="proxyInterfaces" >< value > com.*.spring.dao.PlantDao </ value ></ property >           
        <!-- 配置事务属性 -->  
        < property name ="transactionAttributes" >  
            < props >  
                < prop key ="*" > PROPAGATION_REQUIRED </ prop >
            </ props >  
        </ property >  
    </ bean >
   
    <!-- 配置Service -->
    < bean id ="plantGeneratorServiceTarget"  
        class ="com.*.spring.service.PlantGeneratorServiceImpl" >  
        < property name ="plantDao" >  
            < ref bean ="plantDao"   />  
        </ property >  
        < property name ="generatorDao" >  
            < ref bean ="generatorDao"   />  
        </ property >  
    </ bean >        
   
    < bean id ="plantGeneratorService"  
        class ="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" >  
           <!-- 配置事务管理器 -->  
           < property name ="transactionManager" >< ref bean ="transactionManager"   /></ property >     
        < property name ="target" >< ref bean ="plantGeneratorServiceTarget"   /></ property >  
        < property name ="proxyInterfaces" >< value > com.*.spring.service.PlantGeneratorService </ value ></ property >
        <!-- 配置事务属性 -->  
        < property name ="transactionAttributes" >  
            < props >  
                < prop key ="*" > PROPAGATION_REQUIRED </ prop >  
            </ props >  
        </ property >  
    </ bean >  
</ beans >

<? 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 >

    <!-- 各属性的配置 -->
    <!-- 为true表示将Hibernate发送给数据库的sql显示出来 -->
    < property name ="hibernate.show_sql" > true </ property >
    < property name ="hibernate.hbm2ddl.auto" > none </ property >  

    <!-- SQL方言，这边设定的是MySQL -->
    < property name ="dialect" > org.hibernate.dialect.MySQLDialect </ property >
    <!-- 连接数据库的Driver -->
    < property name ="connection.driver_class" > com.mysql.jdbc.Driver </ property >
    <!-- 数据库连接url -->
    < property name ="connection.url" > jdbc:mysql://localhost:3306/test </ property >

    <!-- 用户名 -->
    < property name ="connection.username" > root </ property >
    <!-- 密码 -->
    < property name ="connection.password" > 123456 </ property >

    <!-- 映射文件  -->
    < mapping class ="com.*.spring.domain.Generator"   />
    < mapping class ="com.*.spring.domain.Plant"   />
</ session-factory >
</ hibernate-configuration >

public   interface GeneratorDao {

    /**
     * 获取所有机组数据
     * @return
     */
    public List < Generator > listGenerators();
   
    /**
     * 保存机组数据
     * @param generator 机组数据
     */
    public   void save(Generator generator);   
}

public   class GeneratorDaoImpl extends HibernateDaoSupport implements GeneratorDao {
      
    @SuppressWarnings( " unchecked " )
    public List < Generator > listGenerators() {
        return   this .getSession().createQuery( " from Generator " ).list();
    }

    public   void save(Generator generator) {
        this .getSession().save(generator);   
    }
}