java多处返回问题

2012-10-29 02:22:09 184 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

多处理器编程的艺术（一）-并行与并发这一系列的文章将会介绍Java中的多线程编程的处理，从原理到实践，还有需要注意的种种问题分析。第一部分我们介绍并行和并发程序的原理；第二部分介绍的是并行程序的设计；第三部分介绍并发程序的设计。 Java的多线程编程 Java中实现多线程的方法： 1.继承Thread类 class MyThread extends Thread { public v 阅读详情



public boolean isWorkDay()

	{

		Connection connection = null;

		Statement st = null;

		ResultSet rs = null;

		try

		{

			connection = JDBCHelperV2.getConnection();

			

			String sql_workDay = sql_getHoliday;

			sql_workDay = sql_workDay.replace("@type", "2");

			rs = JDBCHelperV2.executeQuery(connection, sql_workDay);

			while (rs.next())

			{

				return true;

			}

	

			String sql_holiday = sql_getHoliday;

			sql_holiday = sql_holiday.replace("@type", "1");

			rs = JDBCHelperV2.executeQuery(connection, sql_holiday);

			while (rs.next())

			{

				return false;

			}



			rs = JDBCHelperV2.executeQuery(connection, sql_getDayOfWeek);

			while (rs.next())

			{

				String temp = rs.getString("weekday");

				if (temp.equals("7") || temp.equals("1"))

				{

					return false;

				}

				return true;

			}

		}

		catch(SQLException sqle)

		{

			throw new RuntimeException(sqle);

		}

		catch(Exception e)

		{

		}

		finally

		{

			try {if (null != rs) {st = rs.getStatement();rs.close();}} catch(SQLException e1) {logger.error("isWorkDay:e1" + e1);}

			try {if (null != st) {st.close();}} catch(SQLException e3) {logger.error("isWorkDay:e1" + e3);}

			try {if (null != connection) {connection.close();}} catch(SQLException e2) {logger.error("isWorkDay:e1" + e2);}

		}

		return false;

	}

问题：当执行try {if (null != connection) {connection.close();}} catch(SQLException e2) {logger.error("isWorkDay:e1" + e2);}也就是关闭connection的时候回跳转到while (rs.next())
{
return true;
}或者
while (rs.next())
{
return false;
}
为啥会跳转到前面呢？如果我定义一个boolean值依次赋值，最后返回该boolean值则可以按正确顺序走下去，请指点下啥原因吧，迷茫啊

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