Java SSM框架操作事务

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_36652619/article/details/82049683

配置事务管理器，spring-mvc配置中添加：

<!-- 使用@Transactional进行声明式事务管理需要声明下面这行 -->
    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />
    <!-- 事务管理 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
        <property name="rollbackOnCommitFailure" value="true"/>
    </bean>

​

service中方法上添加注解@Transactional，当方法抛出异常时，状态回滚，如果catch异常，则回滚无效 

@Transactional
    public boolean deleteUser(String userid) throws Exception {
        boolean is_success = userDao.deleteUser(userid);
        if (!is_success) {
            throw new Exception("失败");
        }
        return is_success;
    }

​

手动实现状态回滚

//事务
            DataSourceTransactionManager transactionManager = (DataSourceTransactionManager) ctx.getBean("transactionManager");
            DefaultTransactionDefinition def = new DefaultTransactionDefinition();
            //隔离级别
            def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRES_NEW);
            TransactionStatus status = transactionManager.getTransaction(def);
            try {
                //用户表
                int userResult = userMapper.decide_plan_user(id, plan, String.valueOf(days.intValue()), String.valueOf(Const.WORD_INIT));
                if (userResult == 0){
                    throw new Exception();
                }
                //计划表

                transactionManager.commit(status);
            } catch (Exception e) {
                transactionManager.rollback(status);
                return ServerResponse.createByErrorMessage("更新出错！");
            }