枫叶飘零
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2005-05-23
Oracle里时间的应用
</div> </div> <div class="postFooter"> <div class="tags">Tag：</div> <div class="menubar"><span class="author"><a href="http://home.blogbus.com/profile/cszyj780217">cszyj780217</a></span> 发表于<span class="time">10:01</span> | <a href='http://cszyj780217.blogbus.com/logs/1205294.html' class='readmore'>阅读全文</a> | <a href='http://cszyj780217.blogbus.com/logs/1205294.html#cmt_form' class='cmt'>评论 <span class='count'>0</span></a> | <a href='http://www.blogbus.com/user/?mm=Post&aa=Edit&blogid=48082&id=1205294' class='edit'>编辑</a> | <a href='http://app.home.blogbus.com/share?t=Oracle%E9%87%8C%E6%97%B6%E9%97%B4%E7%9A%84%E5%BA%94%E7%94%A8&url=http%3A%2F%2Fcszyj780217.blogbus.com%2Flogs%2F1205294.html&un=cszyj780217&k=0b196c095a145d0c4a28e6a72b8e66be' class='dig' target='_blank' onclick="share_click('share_5defe09ecba862c8ae2a77a8af72aa25');">分享<span id='share_5defe09ecba862c8ae2a77a8af72aa25'> 0</span></a></div> </div> </li> <li> <div class="postHeader"> <h3>2005-05-19</h3> <h2><a href='http://cszyj780217.blogbus.com/logs/1195387.html'>构建更好的异常处理框架</a></h2> </div> <div class="postBody"> <p>在本系列先前的技巧文章中，异常处理不属于讨论的核心范围之内。但是，您可能会发现一点，那就是我们一直都回避来自 Web 层的低级异常。我们向客户机提供诸如 <code>ApplicationException</code> 和 <code>InvalidDataException</code> 之类的异常，而没有让 Web 层处理象 <code>java.rmi.RemoteException</code> 或 <code>javax.naming.NamingException</code> 这样的异常。</p><p>远程和命名异常是<i>系统级</i>异常，而应用程序和非法数据异常是<i>业务级</i>异常，因为它们提交更适用的业务信息。当决定抛出何种类型的异常时，您应该总是首先考虑将要处理所报告异常的层。Web 层通常是由执行业务任务的最终用户驱动的，所以最好用它处理业务级异常。但是，在 EJB 层，您正在执行系统级任务，如使用 JNDI 或数据库。尽管这些任务最终将被合并到业务逻辑中，但是最好用诸如 <code>RemoteException</code> 之类的系统级异常来表示它们。</p><p>理论上，您可... <div class="clear"></div> </div> <div class="postFooter"> <div class="tags">Tag：</div> <div class="menubar"><span class="author"><a href="http://home.blogbus.com/profile/cszyj780217">cszyj780217</a></span> 发表于<span class="time">10:30</span> | <a href='http://cszyj780217.blogbus.com/logs/1195387.html' class='readmore'>阅读全文</a> | <a href='http://cszyj780217.blogbus.com/logs/1195387.html#cmt_form' class='cmt'>评论 <span class='count'>0</span></a> | <a href='http://www.blogbus.com/user/?mm=Post&aa=Edit&blogid=48082&id=1195387' class='edit'>编辑</a> | <a href='http://app.home.blogbus.com/share?t=%E6%9E%84%E5%BB%BA%E6%9B%B4%E5%A5%BD%E7%9A%84%E5%BC%82%E5%B8%B8%E5%A4%84%E7%90%86%E6%A1%86%E6%9E%B6&url=http%3A%2F%2Fcszyj780217.blogbus.com%2Flogs%2F1195387.html&un=cszyj780217&k=129f04f64996337093cde357b982510f' class='dig' target='_blank' onclick="share_click('share_b93c5faa51ae2bb4fa598f14771c563d');">分享<span id='share_b93c5faa51ae2bb4fa598f14771c563d'> 0</span></a></div> </div> </li> <li> <div class="postHeader"> <h3>2005-05-09</h3> <h2><a href='http://cszyj780217.blogbus.com/logs/1173429.html'>谈谈Unicode编码，简要解释UCS、UTF、BMP、BOM等名词</a></h2> </div> <div class="postBody"> <PRE></PRE> <div class="clear"></div> </div> <div class="postFooter"> <div class="tags">Tag：</div> <div class="menubar"><span class="author"><a href="http://home.blogbus.com/profile/cszyj780217">cszyj780217</a></span> 发表于<span class="time">08:44</span> | <a href='http://cszyj780217.blogbus.com/logs/1173429.html' class='readmore'>阅读全文</a> | <a href='http://cszyj780217.blogbus.com/logs/1173429.html#cmt_form' class='cmt'>评论 <span class='count'>0</span></a> | <a href='http://www.blogbus.com/user/?mm=Post&aa=Edit&blogid=48082&id=1173429' class='edit'>编辑</a> | <a href='http://app.home.blogbus.com/share?t=%E8%B0%88%E8%B0%88Unicode%E7%BC%96%E7%A0%81%EF%BC%8C%E7%AE%80%E8%A6%81%E8%A7%A3%E9%87%8AUCS%E3%80%81UTF%E3%80%81BMP%E3%80%81BOM%E7%AD%89%E5%90%8D%E8%AF%8D&url=http%3A%2F%2Fcszyj780217.blogbus.com%2Flogs%2F1173429.html&un=cszyj780217&k=df92456c36ff5e23536750475fc041b9' class='dig' target='_blank' onclick="share_click('share_b417227b2566c227ce12c67dfe402517');">分享<span id='share_b417227b2566c227ce12c67dfe402517'> 0</span></a></div> </div> </li> <script type='text/javascript'>var post_ids='1205294,1195387,1173429,';</script><script 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