Spring配置事务 http://www.cnblogs.com/leiOOlei/p/3725911.html

2023-01-04 09:22:15

http://www.cnblogs.com/leiOOlei/p/3725911.html

JNDI方式配置数据源：

<?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: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-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
  <property name="jndiName">
   <value>P2PDS</value>
  </property>
</bean>


<bean id="txManager" class="org.springframework.transaction.jta.JtaTransactionManager"></bean>

    <bean id="baseTransactionProxy" abstract="true" class="org.springframework.aop.framework.ProxyFactoryBean"></bean>

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  <property name="dataSource">
   <ref local="dataSource" />
  </property>
  <property name="mappingLocations">
   <list>
    <value>WEB-INF/classes/**/hibernate/**.hbm.xml</value>
   </list>
  </property>
  <property name="hibernateProperties">
   <props>
    <prop key="hibernate.dialect">
     org.hibernate.dialect.OracleDialect
    </prop>
    <prop key="hibernate.show_sql">true</prop>
    <prop key="hibernate.use_sql_comments">false</prop>
   </props>
  </property>
</bean>

二、其他方式配置数据源

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:context="http://www.springframework.org/schema/context"

    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"

    xsi:schemaLocation="

        http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans-4.0.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context-4.0.xsd

        http://www.springframework.org/schema/aop

        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd

        http://www.springframework.org/schema/tx

        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd

        ">

    <!-- Hibernate4 -->

    <!-- 加载资源文件  其中包含变量信息，必须在Spring配置文件的最前面加载，即第一个加载-->

    <context:property-placeholder location="classpath:persistence-mysql.properties" />

    <bean id="sessionFactory"

        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">

        <property name="dataSource" ref="dataSource" />

        <property name="packagesToScan">

            <list>

                <!-- 可以加多个包 -->
<value>com.lei.demo.entity</value>
            </list>

        </property>

        <property name="hibernateProperties">

            <props>

                <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>

                <prop key="hibernate.dialect">${hibernate.dialect}</prop>

                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>

                <!--  <prop key="hibernate.current_session_context_class">thread</prop> -->

            </props>

        </property>

    </bean>

    <!-- 数据库映射 -->

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">

      <property name="driverClassName" value="${jdbc.driverClassName}" />

      <property name="url" value="${jdbc.url}" />

      <property name="username" value="${jdbc.user}" />

      <property name="password" value="${jdbc.pass}" />

   </bean>

    <!-- 配置Hibernate事务管理器 -->

    <bean id="transactionManager"

        class="org.springframework.orm.hibernate4.HibernateTransactionManager">

      <property name="sessionFactory" ref="sessionFactory" />

   </bean>

   <!-- 配置事务异常封装 -->

   <bean id="persistenceExceptionTranslationPostProcessor"

       class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />

   <!--  声明式容器事务管理 ,transaction-manager指定事务管理器为transactionManager -->

    <tx:advice id="txAdvice" transaction-manager="transactionManager">

        <tx:attributes>

            <tx:method name="add*" propagation="REQUIRED" />

            <tx:method name="get*" propagation="REQUIRED" />

　　　　　　　　<tx:method name="addTemporaryBankCreditFile" propagation="REQUIRED" timeout="180" rollback-for="APSException,Exception"/> 
            <tx:method name="*" read-only="true" />

        </tx:attributes>

    </tx:advice>

    <aop:config expose-proxy="true">

        <!-- 只对业务逻辑层实施事务 -->

        <aop:pointcut id="txPointcut" expression="execution(* com.lei.demo.service..*.*(..))" />

        <!-- Advisor定义，切入点和通知分别为txPointcut、txAdvice -->

        <aop:advisor pointcut-ref="txPointcut" advice-ref="txAdvice"/>

    </aop:config>

//加入其他的分spring配置文件，类似在web.xml中加入分的struts-config
<import resource="../classes/com/crfchina/p2p/salary/service/applicationContext_p2psalary.xml"/>

</beans>

Spring配置事务 http://www.cnblogs.com/leiOOlei/p/3725911.html

其中主要配置中是tx:advice和aop:config两个配置节，以Spring AOP的方式实现事务管理。

tx:advice配置了事务的管理者是transactionManager，同时tx:method也规定了如果方法名匹配“add*”和“get*”方法时使用事务，propagation是设定事务的传播级别。除了“add*”和“get*”方法，其他的方法的事务是只读的（典型地，对于只执行查询的事务你会将该属性设为true，如果出现了更新、插入或是删除语句时只读事务就会失败）

aop:config指定了一个aop:pointcut去引用上边的advice。

这样就通过AOP的拦截机制实现了事务，当然你还要用Spring的方式自己配置UserDAO和UserService。

二、 Annotation方式

第一步，首先看一下web.xml，如下：

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xmlns="http://java.sun.com/xml/ns/javaee"

    xmlns:web="http://java.sun.com/xml/ns/javaee"

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

        http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

        id="WebApp_ID" version="3.0">

  <display-name>Archetype Created Web Application</display-name>

  <context-param>

    <param-name>contextConfigLocation</param-name>

    <param-value>classpath:/spring-*.xml</param-value>

  </context-param>

  <listener>

    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

  </listener>

  <servlet>

    <servlet-name>lei-dispatcher</servlet-name>

    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

    <init-param>

      <param-name>contextConfigLocation</param-name>

      <param-value>classpath:/lei-dispatcher-servlet.xml</param-value>

    </init-param>

    <load-on-startup>1</load-on-startup>

  </servlet>

  <servlet-mapping>

    <servlet-name>lei-dispatcher</servlet-name>

    <url-pattern>/</url-pattern>

  </servlet-mapping>

</web-app>

第二步，spring-hibernate配置，见以下spring-hibernate.xml配置

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:context="http://www.springframework.org/schema/context"

    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"

    xsi:schemaLocation="

        http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans-4.0.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context-4.0.xsd

        http://www.springframework.org/schema/aop

        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd

        http://www.springframework.org/schema/tx

        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd

        ">

    <!-- Hibernate4 -->

    <!-- 加载资源文件  其中包含变量信息，必须在Spring配置文件的最前面加载，即第一个加载-->

    <context:property-placeholder location="classpath:persistence-mysql.properties" />

    <bean id="sessionFactory"

        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">

        <property name="dataSource" ref="dataSource" />

        <property name="packagesToScan">

            <list>

                <!-- 可以加多个包 -->

                <value>com.lei.demo.entity</value>

            </list>

        </property>

        <property name="hibernateProperties">

            <props>

                <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>

                <prop key="hibernate.dialect">${hibernate.dialect}</prop>

                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>

                <!--  <prop key="hibernate.current_session_context_class">thread</prop> -->

            </props>

        </property>

    </bean>

    <!-- 数据库映射 -->

    <!--  class="org.apache.tomcat.dbcp.dbcp.BasicDataSource" -->

    <!--  class="org.springframework.jdbc.datasource.DriverManagerDataSource" -->

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">

      <property name="driverClassName" value="${jdbc.driverClassName}" />

      <property name="url" value="${jdbc.url}" />

      <property name="username" value="${jdbc.user}" />

      <property name="password" value="${jdbc.pass}" />

   </bean>

    <!-- 配置Hibernate事务管理器 -->

    <bean id="transactionManager"

        class="org.springframework.orm.hibernate4.HibernateTransactionManager">

      <property name="sessionFactory" ref="sessionFactory" />

   </bean>

   <!-- 配置事务异常封装 -->

   <bean id="persistenceExceptionTranslationPostProcessor"

       class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />

</beans>

第一节中xml配置事务中需要通过配置tx:advice和aop:config来增加事务的功能。此处采用全注释方法，这两个配置节就不需要了。

相应的需要在视图解析配置中启用注释，如下lei-dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:mvc="http://www.springframework.org/schema/mvc"

    xmlns:p="http://www.springframework.org/schema/p"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xmlns:tx="http://www.springframework.org/schema/tx"

    xsi:schemaLocation="

        http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context-3.0.xsd

        http://www.springframework.org/schema/mvc

        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd

        http://www.springframework.org/schema/tx

        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd

        ">

    <!-- 启动自动扫描 该包下所有的Bean(@Controller) -->

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

    <!-- 基于注释的事务，当注释中发现@Transactional时，使用id为“transactionManager”的事务管理器  -->

    <!-- 如果没有设置transaction-manager的值，则spring以缺省默认的事务管理器来处理事务，默认事务管理器为第一个加载的事务管理器 -->

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

    <!-- 定义视图解析器 -->

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

        <property name="prefix">

            <value>/WEB-INF/user/</value>

        </property>

        <property name="suffix">

            <value>.jsp</value>

        </property>

    </bean>

</beans>

UserDAO如下

package com.lei.demo.dao;

import java.util.List;

import javax.annotation.Resource;

import org.hibernate.Query;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.springframework.stereotype.Repository;

import com.lei.demo.entity.Users;

@Repository

public class UsersDAO {

    @Resource(name="sessionFactory")

    private SessionFactory sessionFactory;

    public void setSessionFactory(SessionFactory sessionFactory) {

        this.sessionFactory = sessionFactory;

    }

    public SessionFactory getSessionFactory() {

        return sessionFactory;

    }

    public List<Users> getAllUser(){

        String hsql="from users";

        Session session = sessionFactory.getCurrentSession();

        Query query = session.createQuery(hsql);

        return query.list();

    }

}

UserService.java如下

package com.lei.demo.service;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import org.springframework.transaction.annotation.Isolation;

import org.springframework.transaction.annotation.Propagation;

import org.springframework.transaction.annotation.Transactional;

import com.lei.demo.dao.*;

@Service("userService")

public class UserService {

    @Resource

    private UsersDAO userDao;

    @Transactional

    public int userCount(){

        return userDao.getAllUser().size();

    }

    public UsersDAO getUserDao() {

        return userDao;

    }

    public void setUserDao(UsersDAO userDao) {

        this.userDao = userDao;

    }

}

这里，方法名userCount上加入@Transactional，说明这个方法要启用事务。如果类名UserService上加入@Transactional，则表明这个类中的所有方法都会启用事务。

如果配有多个transactionManager，例如配置有transactionManager1,和transactionManager2，则可以通过@Transactional(“transactionManager1”)，的方式指定使用哪个数据源的事务。

部分内容引自：http://www.cnblogs.com/leiOOlei/p/3725911.html

码农公寓

二、 Annotation方式

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