Spring总结十:事务案例
数据库表Account:
导包:
<dependencies> <!--测试--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> </dependency> <!--mysql--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> </dependency> <!--连接池--> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> </dependency> <!--spring--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> </dependency> <!--日志--> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </dependency> </dependencies>
tx,aop配置声名式事务:
首先编写我们的dao和service代码:
public class AccountDao extends JdbcDaoSupport { //出账 public void rollout(String name, double money) { String sql = "update account set money=money-? where name=?"; super.getJdbcTemplate().update(sql, money, name); } //入账 public void shiftto(String name, double money) { String sql = "update account set money=money+? where name=?"; super.getJdbcTemplate().update(sql, money, name); } }
public class AccountService { private AccountDao accountDao; public void setAccountDao(AccountDao accountDao) { this.accountDao = accountDao; } //转账 public void transfer(String outName, String inName, double money) { accountDao.rollout(outName, money); //int i = 1 / 0; accountDao.shiftto(inName, money); } }
添加数据库配置文件jdbc.properties:
jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://127.0.0.1:3306/temp_db?useUnicode=true&characterEncoding=utf8&autoReconnect=true\ &allowMultiQueries=true jdbc.username=root jdbc.password=root
添加并配置spring配置文件applicationContext.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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd "> <!--关联jdbc配置文件--> <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder> <!--配置c3p0连接池--> <bean id="c3p0DataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driverClassName}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean> <!--dao和service--> <bean id="accountDao" class="com.zy.dao.AccountDao"> <!--由于我们的AccountDao继承了JdbcDaoSupport 所以跳过jdbcTemplate 直接设置datasource--> <property name="dataSource" ref="c3p0DataSource"></property> </bean> <bean id="accountService" class="com.zy.service.AccountService"> <property name="accountDao" ref="accountDao"></property> </bean> <!--定义事务管理器(声明式的事务)--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="c3p0DataSource"></property> </bean> <!--tx标签配置的拦截器 底层依赖aop环绕通知 所以下面会配置aop切入点和切面--> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <!-- 配置事务管理属性,TransactionDefinition --> <!-- name 方法名 isolation 隔离级别 默认DEFAULT propagation 传播行为 默认 REQUIRED timeout 超时时间 默认 -1 不超时 read-only 是否只读 默认false 不是只读 rollback-for 配置一些异常,发生这些异常事务进行回滚 no-rollback-for 配置一些异常,发生这些异常,将被忽略,事务仍然进行提交 --> <!--我们拦截的方法是转账方法 transfer--> <tx:method name="transfer"/> </tx:attributes> </tx:advice> <!--配置切入点和切面--> <aop:config proxy-target-class="false"> <aop:advisor advice-ref="txAdvice" pointcut="bean(*Service)"></aop:advisor> </aop:config> </beans>
测试代码:
@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = "classpath:applicationContext.xml") public class AccountServiceTest { @Value("#{accountService}") AccountService accountService; @Test public void transfer() throws Exception { accountService.transfer("张学友", "刘德华", 100); } }
使用@Transactional注解进行声明式事务管理:
需要加事务的方法上加上注解:
public class AccountService { private AccountDao accountDao; public void setAccountDao(AccountDao accountDao) { this.accountDao = accountDao; } //转账 @Transactional public void transfer(String outName, String inName, double money) { accountDao.rollout(outName, money); accountDao.shiftto(inName, money); } }
applicationContext.xml修改如下:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd "> <!--关联jdbc配置文件--> <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder> <!--配置c3p0连接池--> <bean id="c3p0DataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driverClassName}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean> <!--dao和service--> <bean id="accountDao" class="com.zy.dao.AccountDao"> <!--由于我们的AccountDao继承了JdbcDaoSupport 所以跳过jdbcTemplate 直接设置datasource--> <property name="dataSource" ref="c3p0DataSource"></property> </bean> <bean id="accountService" class="com.zy.service.AccountService"> <property name="accountDao" ref="accountDao"></property> </bean> <!--<!–定义事务管理器(声明式的事务)–>--> <!--<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">--> <!--<property name="dataSource" ref="c3p0DataSource"></property>--> <!--</bean>--> <!--<!–tx标签配置的拦截器 底层依赖aop环绕通知 所以下面会配置aop切入点和切面–>--> <!--<tx:advice id="txAdvice" transaction-manager="transactionManager">--> <!--<tx:attributes>--> <!--<!– 配置事务管理属性,TransactionDefinition –>--> <!--<!–--> <!--name 方法名--> <!--isolation 隔离级别 默认DEFAULT--> <!--propagation 传播行为 默认 REQUIRED--> <!--timeout 超时时间 默认 -1 不超时--> <!--read-only 是否只读 默认false 不是只读--> <!--rollback-for 配置一些异常,发生这些异常事务进行回滚--> <!--no-rollback-for 配置一些异常,发生这些异常,将被忽略,事务仍然进行提交--> <!--–>--> <!--<!–我们拦截的方法是转账方法 transfer–>--> <!--<tx:method name="transfer"/>--> <!--</tx:attributes>--> <!--</tx:advice>--> <!--<!–配置切入点和切面–>--> <!--<aop:config proxy-target-class="false">--> <!--<aop:advisor advice-ref="txAdvice" pointcut="bean(*Service)"></aop:advisor>--> <!--</aop:config>--> <!--增加注解版 事务管理器--> <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven> <!--事务通知依赖于 事务管理器--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="c3p0DataSource"></property> </bean> </beans>
ok