休眠保存實體不起作用

Question

我在項目中使用Spring 3.2 mvc和Hibernate 4 。

的hibernate.cfg.xml

<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.autocommit">true</property>
<property name="show_sql">true</property>
  <property name="hibernate.c3p0.min_size">5</property>
  <property name="hibernate.c3p0.max_size">20</property>
  <property name="hibernate.c3p0.timeout">300</property>
  <property name="hibernate.c3p0.max_statements">50</property>
  <property name="hibernate.c3p0.idle_test_period">3000</property>
  <property name="hibernate.validator.apply_to_ddl">false</property> 
  <property name="hibernate.validator.autoregister_listeners">false</property>

servlet的context.xml中

<beans:beans xmlns="http://www.springframework.org/schema/mvc"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:beans="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:security="http://www.springframework.org/schema/security"
       xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
              http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
              http://www.springframework.org/schema/security
              http://www.springframework.org/schema/security/spring-security-3.2.xsd
              http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
              http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">



       <!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
       <security:global-method-security pre-post-annotations="enabled"/>
       <!-- Enables the Spring MVC @Controller programming model -->
       <annotation-driven />
       <context:annotation-config />
       <context:component-scan base-package="com.abc" />

       <beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
              <beans:property name="prefix" value="/WEB-INF/views/" />
              <beans:property name="suffix" value=".jsp" />
       </beans:bean>

</beans:beans>

DaoImpl類別 ：

public void add(Entity entity) {

   try {
          this.sessionFactory.getCurrentSession().save(entity);
          this.sessionFactory.getCurrentSession().flush();
       } catch (Exception e) {
             logger.error("Exception occured " + e);
       } 
   }

這是我的project configuration和dao impl class文件。

根的context.xml

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"  
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd 
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">

     <!-- <tx:annotation-driven transaction-manager="transactionManager" /> -->
     <bean id="transactionManager"
        class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
     </bean>

    <tx:annotation-driven transaction-manager="transactionManager"/>

    <context:component-scan base-package="com.abc" />

    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
       <!--  <property name = "dataSource" ref = "dataSource"></property>  -->
        <property name="configLocation">
            <value>classpath:hibernate.cfg.xml</value>
        </property>
        <property name="entityInterceptor" ref ="auditLogInterceptor"/>
    </bean> 

問題
到目前為止，在hibernate.cfg.xml中，我已經提到過hibernate.connection.autocommit = true，並且在daoimpl中保存實體時，我需要在.save之后調用flush 。

如果我從daoimpl類中刪除了hibernate.connection.autocommit = true和.flush ，我發現daoimpl中的.save方法無法正常工作，這意味着我的數據無法插入，甚至我也看不到hibernate在控制台上執行的插入查詢。

hibernate.connection.autocommit cfg xml中不應存在hibernate.connection.autocommit = true，就好像我在同一事務中對多個表進行操作一樣，如果發生某些錯誤，則不會發生回滾。

我希望即使我不在hibernate cfg xml和.flush編寫hibernate.connection.autocommit = true，daoimpl中的.save也應能正常工作。

我正在使用@Transactional注釋進行交易。

Answer 1

您尚未將任何TransactionManager添加到配置中：

1. 刪除以下屬性：

    <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property> <property name="hibernate.connection.autocommit">true</property> <property name="hibernate.c3p0.min_size">5</property> <property name="hibernate.c3p0.max_size">20</property> <property name="hibernate.c3p0.timeout">300</property> <property name="hibernate.c3p0.max_statements">50</property> <property name="hibernate.c3p0.idle_test_period">3000</property> 

2. 添加連接池數據源（DBCP2比C3P0更好）

    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close"> <property name="driverClassName" oracle.jdbc.driver.OracleDriver"/> <property name="url" value="your-oracle-driver-url"/> <property name="username" value="your-username"/> <property name="password" value="your-password"/> </bean> 

3. 現在添加Sessionfactory Spring代理：

    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="configLocation" value="classpath:hibernate.cfg.xml" /> </bean> 

4. 添加TransactionManager bean

    <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="dataSource" ref="dataSource" /> <property name="sessionFactory" ref="sessionFactory" /> </bean> 

更新

如果您在單獨的spring應用程序上下文（例如root-context.xml）中設置了事務管理器，則將這些行從Web上下文移至后端上下文：

<tx:annotation-driven transaction-manager="transactionManager"/>
<context:component-scan base-package="com.abc.service" />
<context:component-scan base-package="com.abc.dao" />

並且僅允許Web上下文掃描其自己的bean：

<context:component-scan base-package="com.abc.web" />

混合使用網絡和后端上下文職責是不好的 。

Answer 2

我的問題解決了，我只在注解@Transactional中寫了

@Repository
@Transactional
public class AbstractHibernateDao<T extends Serializable> {

    private Class<T> clazz;

    @Autowired
    private SessionFactory sessionFactory;

這就解決了我不使用沖洗就無法刪除或保存的問題。