36.4 基于XML的AOP实现事务控制
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.xww</groupId>
<artifactId>day36_spring_aopXML</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
</build>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>commons-dbutils</groupId>
<artifactId>commons-dbutils</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.7</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
</dependencies>
</project>
<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl">
<property name="accountDao" ref="accountDao"></property>
</bean>
<bean id="accountDao" class="com.itheima.dao.impl.AccountDaoImpl">
<property name="runner" ref="runner"></property>
<property name="connectionUtils" ref="connectionUtils"></property>
</bean>
<bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype"></bean>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/eesy"></property>
<property name="user" value="root"></property>
<property name="password" value="1234"></property>
</bean>
<bean id="connectionUtils" class="com.itheima.utils.ConnectionUtils">
<property name="dataSource" ref="dataSource"></property>
</bean>
<bean id="txManager" class="com.itheima.utils.TransactionManager">
<property name="connectionUtils" ref="connectionUtils"></property>
</bean>
<aop:config>
<aop:pointcut id="pt1" expression="execution(* com.itheima.service.impl.*.*(..))"></aop:pointcut>
<aop:aspect id="txAdvice" ref="txManager">
<aop:before method="beginTransaction" pointcut-ref="pt1"></aop:before>
<aop:after-returning method="commit" pointcut-ref="pt1"></aop:after-returning>
<aop:after-throwing method="rollback" pointcut-ref="pt1"></aop:after-throwing>
<aop:after method="release" pointcut-ref="pt1"></aop:after>
</aop:aspect>
</aop:config>
</beans>
36.5 spring中基于XML的声明式事务控制配置步骤
- 1.配置事务管理器
- 2.配置事务的通知
- 此时我们需要导入事务的约束 tx名称空间和约束,同时也需要aop的.
- 使用tx:advice标签配置事务通知.
- 属性:
- id:给事务通知起一个唯一标识
- transaction-manager:给事务通知提供一个事务管理器引用
- 配置事务的属性:
- isolation:用于指定事务的隔离级别。默认值是DEFAULT,表示使用数据库的默认隔离级别。
- propagation:用于指定事务的传播行为。默认值是REQUIRED,表示一定会有事务,增删改的选择。查询方法可以选择SUPPORTS。
- read-only:用于指定事务是否只读。只有查询方法才能设置为true。默认值是false,表示读写。
- timeout:用于指定事务的超时时间,默认值是-1,表示永不超时。如果指定了数值,以秒为单位。
- rollback-for:用于指定一个异常,当产生该异常时,事务回滚,产生其他异常时,事务不回滚。没有默认值。表示任何异常都回滚。
- no-rollback-for:用于指定一个异常,当产生该异常时,事务不回滚,产生其他异常时事务回滚。没有默认值。表示任何异常都回滚。
- 3.配置AOP中的通用切入点表达式
- 4.建立事务通知和切入点表达式的对应关系
- 5.配置事务的属性
- bean.xml
<?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.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl">
<property name="accountDao" ref="accountDao"></property>
</bean>
<bean id="accountDao" class="com.itheima.dao.impl.AccountDaoImpl">
<property name="dataSource" ref="dataSource"></property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/eesy"></property>
<property name="username" value="root"></property>
<property name="password" value="1234"></property>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" propagation="REQUIRED" read-only="false"/>
<tx:method name="find*" propagation="SUPPORTS" read-only="true"></tx:method>
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="pt1" expression="execution(* com.itheima.service.impl.*.*(..))"></aop:pointcut>
<aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"></aop:advisor>
</aop:config>
</beans>
36.6 spring中基于注解 的声明式事务控制配置步骤
- 1.配置事务管理器
- 2.开启spring对注解事务的支持
- 3.在需要事务支持的地方使用 @Transactional注解
- bean.xml
<?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"
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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.itheima"></context:component-scan>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/eesy"></property>
<property name="username" value="root"></property>
<property name="password" value="1234"></property>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>
</beans>