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springmvc+Hibernate+JPA(混合事務(wù))解讀

更新時(shí)間：2024年09月27日 15:34:51 作者：正怒月神

在Spring項(xiàng)目中,Spring Data JPA作為一種持久層框架,因其簡(jiǎn)化數(shù)據(jù)庫(kù)操作而受到青睞,但在將其引入使用Hibernate的舊項(xiàng)目時(shí),可能會(huì)遇到事務(wù)處理問(wèn)題,解決方案包括配置兩種事務(wù)管理器：Hibernate事務(wù)管理器和JPA事務(wù)管理器

springmvc+Hibernate+JPA(混合事務(wù))

最近發(fā)覺(jué) spring-data-jpa 比較好用。

我在springcloud的項(xiàng)目中使用后，也嘗試在springmvc中增加 jpa。

但是老項(xiàng)目用的是hibernate，在使用添加jpa后，事務(wù)出現(xiàn)了一些問(wèn)題。

解決方案

配置文件

1 配置Hibernate事務(wù)（transactionManager）

    <!-- 事物管理器配置  -->
        <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
            <property name="sessionFactory" ref="sessionFactory" />
        </bean>
        <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />
    <!--  hibernate  -->

2 配置Jpa事務(wù)（transactionManager_jpa）

<!-- Jpa 事務(wù)配置 -->
    <bean id="transactionManager_jpa" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
    </bean>

    <!-- Spring Data Jpa配置 -->
    <jpa:repositories base-package="com.kintech.dao.*"  transaction-manager-ref="transactionManager_jpa" entity-manager-factory-ref="entityManagerFactory"/>

    <!-- 使用annotation定義事務(wù) -->
    <tx:annotation-driven transaction-manager="transactionManager_jpa" proxy-target-class="true" />

配置全本：

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:p="http://www.springframework.org/schema/p" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
                           http://www.springframework.org/schema/context
                           http://www.springframework.org/schema/context/spring-context-4.3.xsd
                           http://www.springframework.org/schema/mvc
                           http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
                           http://www.springframework.org/schema/aop
						   http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
						   http://www.springframework.org/schema/tx
                           http://www.springframework.org/schema/tx/spring-tx-4.3.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd"
       default-lazy-init="true">

    <!--配置數(shù)據(jù)源-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
        <property name="driverClass" value="${jdbc.driver}" />  <!--數(shù)據(jù)庫(kù)連接驅(qū)動(dòng)-->
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}" />     <!--數(shù)據(jù)庫(kù)地址-->
        <property name="user" value="${jdbc.user}" />   <!--用戶(hù)名-->
        <property name="password" value="${jdbc.password}" />   <!--密碼-->
        <property name="maxPoolSize" value="${jdbc.maxPoolSize}" />      <!--最大連接數(shù)-->
        <property name="minPoolSize" value="${jdbc.miniPoolSize}" />       <!--最小連接數(shù)-->
        <property name="initialPoolSize" value="${jdbc.initialPoolSize}" />      <!--初始化連接池內(nèi)的數(shù)據(jù)庫(kù)連接-->
        <property name="maxIdleTime" value="${jdbc.maxIdleTime}" />  <!--最大空閑時(shí)間-->
    </bean>

    <!--  hibernate  -->
    <!--配置session工廠(chǎng)-->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="packagesToScan" value="com.kintech.model" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop> <!--hibernate根據(jù)實(shí)體自動(dòng)生成數(shù)據(jù)庫(kù)表-->
                <prop key="hibernate.dialect">${hibernate.dialect}</prop>   <!--指定數(shù)據(jù)庫(kù)方言-->
                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>     <!--在控制臺(tái)顯示執(zhí)行的數(shù)據(jù)庫(kù)操作語(yǔ)句-->
                <prop key="hibernate.format_sql">${hibernate.format_sql}</prop>     <!--在控制臺(tái)顯示執(zhí)行的數(shù)據(jù)哭操作語(yǔ)句（格式）-->
                <prop key="hibernate.cache.use_second_level_cache">${hibernate.cache.use_second_level_cache}</prop>
                <prop key="hibernate.cache.use_query_cache">${hibernate.cache.use_query_cache}</prop>  <!-- 查詢(xún)緩存 -->
                <prop key="hibernate.cache.provider_class">${hibernate.cache.provider_class}</prop>
                <prop key="hibernate.cache.region.factory_class">${hibernate.cache.region.factory_class}</prop>
            </props>
        </property>
    </bean>
    <!-- 事物管理器配置  -->
        <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
            <property name="sessionFactory" ref="sessionFactory" />
        </bean>
        <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />
    <!--  hibernate  -->

    <!--  JPA  -->
    <!-- JPA實(shí)體管理器工廠(chǎng) -->
    <bean id="entityManagerFactory" name="jpaEntityManagerFactory"
          class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter" />
        <!-- 加入定制化包路徑 -->
        <property name="packagesToScan" value="com.kintech.model.domain.*" />

        <property name="jpaProperties">
            <props>
                <prop key="hibernate.current_session_context_class">thread</prop>
                <prop key="hibernate.hbm2ddl.auto">none</prop><!-- validate/update/create -->
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>

                <!-- 建表的命名規(guī)則 -->
                <prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>

            </props>
        </property>
    </bean>

    <!-- 設(shè)置JPA實(shí)現(xiàn)廠(chǎng)商的特定屬性 -->
    <bean id="hibernateJpaVendorAdapter"
          class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
        <property name="databasePlatform" value="${hibernate.dialect}"/>
    </bean>

    <!-- Jpa 事務(wù)配置 -->
    <bean id="transactionManager_jpa" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
    </bean>

    <!-- Spring Data Jpa配置 -->
    <jpa:repositories base-package="com.kintech.dao.*"  transaction-manager-ref="transactionManager_jpa" entity-manager-factory-ref="entityManagerFactory"/>

    <!-- 使用annotation定義事務(wù) -->
    <tx:annotation-driven transaction-manager="transactionManager_jpa" proxy-target-class="true" />
    <!--  JPA  -->

</beans>

修改@Transactional

在使用JPA時(shí)，注明

@Transactional("transactionManager_jpa")

@Transactional("transactionManager_jpa")
    @Override
    public Model_Res add(Model_Req req) {
        //jpa dao
        Model entity = dao.save(reqData);
        return res;
    }

原來(lái)的Hibernate不用改變(因?yàn)?