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<DIV class=pt10><B>9.3.8 XML Servlet软件包</B></DIV>
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<P align=left>XML Servlet是由Cerium Component Software Incorporated
开发的一组商业软件,它可以通过JDBC访问关系数据库在应用系统和数据库之间进行基于XML的双向数据交换。下图展示了XML
Servlet的体系结构。</P>
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<P align=left>XML Servlet 实际上是一种Java
Servlet,它使用XML指令将XML模板、HTML模板同数据库相结合,利用XML Servlet显示和更新数据库中的数据。XML
Servlet的开发模式沿袭了三层架构模式,通过将XML
Servlet放置于中间层的Web服务器,使得XML的应用开发相对独立于前端的用户界面(浏览器)和后端的数据库设计,进一步提高了开发效率。 </P>
<P align=left>XML Servlet
不是孤立的软件,与之相配套的还有两个工具软件:XMLOutline和XMLDB。XMLOutline采用层次化大纲形式的文本编辑器,利用它可以创建DTD和XML文档。XMLDB可以动态地将DTD和XML文档相结合,进而产生用于将XML文档数据存储与数据库中所需的SQL语句,包括可能的主键和外键。<BR><BR>相关网址:<A
href="http://ceriumworks.com/">http://ceriumworks.com/</A><BR></P></DIV>
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