spring基础知识 （27）：xml方式配置事务

这里用到了AOP,需要加入而外的jar,这里加入aspectj的依赖:

<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.6.8</version>
</dependency>

---

下面是所有的依赖:

<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
        <spring.version>4.1.1.RELEASE</spring.version>
        <mysql.version>5.1.34</mysql.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.8</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
    </dependencies>

---

之前配置事务的方式是在方法上加注解，事务的属性也是写在注解里，现在我们使用xml方式配置：
只贴出关键性的代码,完整代码可在之前的博客中找到。

<!-- #1.配置事务管理器 -->
<bean id="transactionManager"
    class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
</bean>

 <!-- 开启事务注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/>

<!-- #2.创建通知并配置事务属性 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>
        <tx:method name="insert*" propagation="REQUIRED" />
        <tx:method name="save*" propagation="REQUIRED" />
        <tx:method name="update*" propagation="REQUIRED" />
        <tx:method name="delete*" propagation="REQUIRED" />
        <tx:method name="get*" propagation="SUPPORTS" read-only="true" />
        <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
        <tx:method name="select*" propagation="SUPPORTS" read-only="true" />
        <tx:method name="load*" propagation="SUPPORTS" read-only="true" />
        <!-- 其他采用默认事务方式 -->
        <tx:method name="*" />
    </tx:attributes>
</tx:advice>

<!-- #3.配置事务切点并将切入点和通知关连 -->
<aop:config>
    <aop:pointcut expression="execution(* com.spring.tx.xml.*.*.*(..))" id="txPointcut"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
</aop:config>

这种方式是将事务管理抽取为切面，使用AOP批量配置事务管理。
这种方式比较常用,只要遵循其配置的规则，就可以一劳永逸。