首先在配置文件中配置一个事务类型的bean
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="jee.pk1"></context:component-scan> <!-- 引入jdbc.properties --> <context:property-placeholder location="jdbc.properties"/> <!-- 配置dbcp数据库 --> <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${driverClassName}" /> <property name="url" value="${url}" /> <property name="username" value="${uName}" /> <property name="password" value="${password}" /> <property name="initialSize" value="3" /> </bean> <!-- 事务管理器 --> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> </beans>访问数据库代码
package jee.pk1; import javax.sql.DataSource; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.stereotype.Component; @Component("userDao") public class UserDaoImpl implements UserDao{ private JdbcTemplate template; @Autowired public void Init(DataSource dataSource) { template=new JdbcTemplate(dataSource); } @Override public boolean delete(int id) { int n=template.update("delete from users where UserId=?",id); return n==1; } }事务代码
package jee.pk1; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import org.springframework.transaction.PlatformTransactionManager; import org.springframework.transaction.TransactionStatus; import org.springframework.transaction.support.TransactionCallbackWithoutResult; import org.springframework.transaction.support.TransactionTemplate; @Component("userService") public class UserServiceImpl implements UserService { private UserDao userDao; @Autowired public void setUserDao(UserDao userDao) { this.userDao = userDao; } //事务模板 private TransactionTemplate txtemplate; //将配置文件中的事务类注入此方法中，然后将事务类赋值给txtemplate @Autowired public void init(PlatformTransactionManager txManager) { this.txtemplate=new TransactionTemplate(txManager); } @Override public void remove() { txtemplate.execute(new TransactionCallbackWithoutResult() { //调用此方法之前开启事务 @Override protected void doInTransactionWithoutResult(TransactionStatus status) { userDao.delete(3); if(1==1) { throw new RuntimeException("某个错误"); } userDao.delete(2); } }); } }主方法
package jee.pk1; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class APP { public static void main(String[] args) { ApplicationContext ac=new ClassPathXmlApplicationContext("beans_pk1.xml"); UserService userService=ac.getBean("userService", UserService.class); userService.remove(); } }