JTA事务和普通JDBC事务回滚实例

下面给出了回滚JDBC事务的代码示例：

Java代码

public void processT(String orders) {    
   Context initCtx = new InitialContext();    
   javax.sql.DataSource ds = javax.sql.DataSource)initCtx.lookup    
   (“java:comp/env/jdbc/OrdersDB”);    
   java.sql.Connection conn = ds.getConnection();    
   try{    
      conn.setAutoCommit( false ); //更改JDBC事务的默认提交方式    
       orderNo = createOrder( orders );    
      updateOrderStatus(orderNo, “orders created”);    
      conn.commit();//提交JDBC事务    
   }catch( Exception e ){    
   try{    
       conn.rollback();//回滚sJDBC事务    
        throw new EJBException(“事务回滚： “ + e.getMessage());    
   }catch( SQLException sqle ){    
     throw new EJBException(“出现SQL操作错误： “ + sqle.getMessage());    
}    
}    
}   

public void processT(String orders) {
	Context initCtx = new InitialContext();
	javax.sql.DataSource ds = javax.sql.DataSource)initCtx.lookup
	(“java:comp/env/jdbc/OrdersDB”);
	java.sql.Connection conn = ds.getConnection();

	try{
		conn.setAutoCommit( false ); //更改JDBC事务的默认提交方式
		orderNo = createOrder( orders );
		updateOrderStatus(orderNo, “orders created”);
		conn.commit();//提交JDBC事务
	}catch( Exception e ){
		try{
			conn.rollback();//回滚sJDBC事务
			throw new EJBException(“事务回滚： “ + e.getMessage());
		}catch( SQLException sqle ){
			throw new EJBException(“出现SQL操作错误： “ + sqle.getMessage());
		}
	}
}

下面给出了JTA事务代码示例：

Java代码

public void processOrder(String orderMessage) {    
	UserTransaction transaction = mySessionContext.getUserTransaction();
	//获得JTA事务    
	try{    
		transaction.begin();//开始JTA事务    
		orderNo = sendOrder(orderMessage);    
		updateOrderStatus(orderNo, “order sent”);    
		transaction.commit();//提交JTA事务    
	}catch(Exception e){    
		try{    
			transaction.rollback();//回滚JTA事务    
		}catch(SystemException se){    
			se.printStackTrace();    
		}    
		throw new EJBException(“事务回滚： “ + e.getMessage());    
	}    
}