spring 编程式事务

编程式的事务管理：我们可以使用org.springframework.jdbc.datasource.DataSourceTransactionManager(platformTransactionManager的一个实现)作为我们的事务管理员，我们在Bean定义中配置，并将DataSource注入给它。
配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost:3306/TestDB</value>
        </property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value></value>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource">
<ref bean="dataSource"/>
</property>
</bean>
<bean id="userDAO" class="onlyfun.caterpillar.UserDAO">
<property name="dataSource">
<ref bean="dataSource"/>
</property>
<property name="transactionManager">
<ref bean="transactionManager"/>
</property>
</bean>
</beans>

DAO操作类：

package onlyfun.caterpillar;
import javax.sql.DataSource;
import org.springframework.jdbc.core.*;
import org.springframework.transaction.*;
import org.springframework.transaction.support.*;
import org.springframework.dao.*;
public class UserDAO {
private DataSource dataSource;
private PlatformTransactionManager transactionManager;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
public void setTransactionManager(PlatformTransactionManager transactionManager) {
this.transactionManager = transactionManager;
}
public void insertUser(User user) {

DefaultTransactionDefinition def = new DefaultTransactionDefinition();
TransactionStatus status = transactionManager.getTransaction(def);
try {
JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource);
jdbcTemplate.update("INSERT INTO USER VALUES('Spring008', 'caterpillar', 'M', 29)");
jdbcTemplate.update("INSERT INTO USER VALUES('Spring009', 'momor', 'F', 26)");
jdbcTemplate.update("INSERT INTO USER VALUES('Spring010, 'beckyday', 'F', 35)");
} catch (DataAccessException ex) {
transactionManager.rollback(status); // 也可以執行status.setRollbackOnly();
        throw ex;
}
transactionManager.commit(status);

} }