Spring学习 事务回滚

<span style="font-size:24px;"><bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"><property name="dataSource" ref="dataSource" /></bean><tx:annotation-driven transaction-manager="transactionManager"/><!-- 配置事务管理器 --><bean id="transactionManager"class="org.springframework.jdbc.datasource.<strong>DataSourceTransactionManager</strong>"><property name="dataSource" ref="dataSource" /></bean></span>

<span style="font-size:24px;">//RuntimeException @Transactional(noRollbackFor = RuntimeException.class)//Exception @Transactional(rollbackFor = Exception.class)public void deleteUser(String id) {String sqlStr = "delete  from t_user where user_id = ? ";jdbcTemplate.update(sqlStr, new Object[] { id });throw new RuntimeException("----运行期异常----");}</span>

结论：默认情况下，unchecked exception是会回滚的。checked exception不会回滚。当然可以通过配置文件爱你进行修改。如上面的注释部分。

<strong style="background-color: rgb(102, 255, 255);">@Transactional(propagation=Propagation.NOT_SUPPORTED,readOnly=true,timeout=3000)</strong>@SuppressWarnings("deprecation")public int getMatchCount(String userName, String password) {String sqlStr = "SELECT count(*) FROM t_user WHERE user_name=? and password=?";return jdbcTemplate.queryForInt(sqlStr, new Object[] { userName,password });}

事务的传播行为 有7种，Propagation.xxxxx . 如 RQUIRED/NO_SUPPORTED/NEVER/REQUIRED_NEW/MANDATORY/SUPPORTS/NESTED.

其中NESTED是Spring特有的。有保存点的说法。内部出错，对外部嵌套的没影响。但外部出错了，内部就要回滚的