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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>什么时候使用 J2EE?</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr>   第 2 页（共6 页）</nobr></font></td>
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<p>J2EE 应用程序模型降低了开发和部署多层解决方案的成本和复杂性，因为 J2EE 容器为应用程序组件提供了一套完整的服务，不需要复杂的编程就可自动处理许多底层关注点。这种功能使得为复杂的企业业务问题实现快速开发解决方案成为可能。</p>
<p>如果有以下需求，那么应当选择 J2EE 平台： 
			<ul>
<li>
<b>更快地向市场推出解决方案：</b> J2EE 容器将业务关注点与系统关注点分离，比 如资源管理和组件的生命周期管理。 这意味着编程人员可将他们的时间更多地用到业务解决方案上，而不是用在编写低层系统任务上。<br>
<br>
</li>
<li>
<b>选择的自由度：</b> J2EE  可以在混合环境中运行，并完全可免于厂商锁定。因此，根据业务需要，可以在一台运行专有操作系统的、昂贵的商业服务器上部署应用程序，也可以在运行个人桌面系统的开源服务器上部署应用程序。<br>
<br>
</li>
<li>
<b>简化到遗留系统的连接：</b> J2EE 技术使得连接业务环境中的现有应用程序和系统变得更容易，并使得为它们扩展新的发货渠道，如 Web、手机和智能装置，也变得更容易。<br>
<br>
</li>
<li>
<b>投资保护：</b>J2EE 平台与业界技术进步保持同步。例如，当 Web 服务获得某种契机之后，J2EE 会在下一个修订版中立即采用它。这保证了 J2EE 技术是有未来保证的，并且 IT 投资受到保护，不会过时。</li>
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