深入解析Java的Spring框架中的混合事务与bean的区分.doc

深入解析Java的Spring框架中的混合事务与bean的区分 这篇文章主要介绍了Java的Spring框架中的混合事务与bean的区分,Spring是Java的SSH三大web开发框架之一,需要的朋友可以参考下 混合事务 在ORM框架的事务管理器的事务内，使用JdbcTemplate执行SQL是不会纳入事务管理的。 下面进行源码分析，看为什么必须要在DataSourceTransactionManager的事务内使用JdbcTemplate。 1.开启事务 DataSourceTransactionManager protected void doBegin(Object transaction,TransactionDefinition definition) { DataSourceTransactionObjecttxObject = (DataSourceTransactionObject) transaction; Connection con = null; try { if(txObject.getConnectionHolder() == null || txObject.getConnectionHolder().isSynchronizedWithTransaction()){ ConnectionnewCon = this.dataSource.getConnection(); if(logger.isDebugEnabled()) { logger.debug(AcquiredConnection [ + newCon + ] for JDBC transaction); } txObject.setConnectionHolder(newConnectionHolder(newCon), true); } txObject.getConnectionHolder().setSynchronizedWithTransaction(true); con =txObject.getConnectionHolder().getConnection(); IntegerpreviousIsolationLevel = DataSourceUtils.prepareConnectionForTransaction(con,definition); txObject.setPreviousIsolationLevel(previousIsolationLevel); // Switch to manualcommit if necessary. This is very expensive in some JDBC drivers, // so we dont wantto do it unnecessarily (for example if weve explicitly // configured theconnection pool to set it already). if(con.getAutoCommit()) { txObject.setMustRestoreAutoCommit(true); if(logger.isDebugEnabled()) { logger.debug(SwitchingJDBC Connection [ + con + ] to manual commit); } con.setAutoCommit(false); } txObject.getConnectionHolder().setTransactionActive(true); int timeout =determineTimeout(definition); if (timeout !=TransactionDefinition.TIMEOUT_DEFAULT) { txObject.getConnectionHolder().setTimeoutInSeconds(timeout); } // Bind the sessionholder to the thread. if(txObject.isNewConnectionHolder()) { TransactionSynchronizationManager.bindResource(getDataSource(),txObject.getConnectionHolder()); } } catch (Exception ex) { DataSourceUtils.releaseConnection(con,this.dataSource); throw newCannotCreateTransactionException(Could not ope