事务管理

编程式事务管理:

public boolean transfer(final Long fromId， final Long toId， final double amount) {
     return (Boolean) transactionTemplate.execute(new TransactionCallback(){
        public Object doInTransaction(TransactionStatus status) {
           Object result;
           try {
             result = bankDao.transfer(fromId， toId， amount);
           } catch (Exception e) {
             status.setRollbackOnly();
             result = false;
             System.out.println("Transfer Error!");
           }
         return result;
        }
      });
   }

声明式事务管理:

@Transactional(propagation = Propagation.REQUIRED)
   public boolean transfer(Long fromId， Long toId， double amount) {
   return bankDao.transfer(fromId， toId， amount);
}