利用JDBC技术实现异构数据库的访问

<p style="margin: 0cm 0cm 0pt" class="MsoNormal"><span style="font-family: HiddenHorzOCR; font-size: 10pt"><font face="Calibri">本文旨在</font></span><span style="font-family: 宋体; font-size: 10pt">阐</span><span style="font-family: 'MS Mincho'; font-size: 10pt">述</span><span style="font-family: HiddenHorzOCR; font-size: 10pt"><font face="Calibri">CIMS </font></span><span style="font-family: 宋体; font-size: 10pt">环</span><span style="font-family: 'MS Mincho'; font-size: 10pt">境下异构数据</span><span style="font-family: 宋体; font-size: 10pt">库</span><span style="font-family: 'MS Mincho'; font-size: 10pt">的数据模型及</span><span style="font-family: 宋体; font-size: 10pt">对</span><span style="font-family: 'MS Mincho'; font-size: 10pt">异构数据</span><font size="3"><span style="font-family: 宋体">库</span><span style="font-family: 'MS Mincho'">的</span><span style="font-family: 宋体">远</span><span style="font-family: 'MS Mincho'">程</span><span style="font-family: 宋体">访问</span><span style="font-family: 'MS Mincho'">。着重</span><span style="font-family: 宋体">论</span><span style="font-family: 'MS Mincho'">述了</span><span style="font-family: HiddenHorzOCR"><font face="Calibri">CIMS </font></span><span style="font-family: 宋体">环</span><span style="font-family: 'MS Mincho'">境下集成异构数据</span><span style="font-family: 宋体">库</span><span style="font-family: 'MS Mincho'">采用的全局</span><span style="font-family: HiddenHorzOCR"><font face="Calibri">数据模型是非一范式，</font></span><span style="font-family: 宋体">综</span><span style="font-family: 'MS Mincho'">述了从</span><span style="font-family: 宋体">层</span><span style="font-family: 'MS Mincho'">次、网状和关系数据模型向非</span><font face="Calibri"><span style="font-family: HiddenHorzOCR">-</span><span style="font-family: HiddenHorzOCR">范</span></font></font><span style="font-family: HiddenHorzOCR; font-size: 10pt"><font face="Calibri">式模型的</font></span><span style="font-family: 宋体; font-size: 10pt">转换</span><span style="font-family: 'MS Mincho'; font-size: 10pt">，以及</span><span style="font-family: 宋体; font-size: 10pt">为</span><span style="font-family: 'MS Mincho'; font-size: 10pt">了解决在</span><span style="font-family: 宋体; font-size: 10pt">转换过</span><span style="font-family: 'MS Mincho'; font-size: 10pt">程中可能遇到的各种冲突而引</span><font size="3"><span style="font-family: HiddenHorzOCR"><font face="Calibri">入的源</font></span><span style="font-family: 宋体">标签</span><span style="font-family: 'MS Mincho'">机制。本文</span><span style="font-family: 宋体">设计</span><span style="font-family: 'MS Mincho'">了一个</span><span style="font-family: 宋体">远</span><span style="font-family: 'MS Mincho'">程</span><span style="font-family: 宋体">访问</span><span style="font-family: 'MS Mincho'">的</span><span style="font-family: 宋体">实</span><span style="font-family: 'MS Mincho'">施方案，利用目前很</span><span style="font-family: HiddenHorzOCR"><font face="Calibri">有</font></span><span style="font-family: 宋体">发</span><span style="font-family: 'MS Mincho'">展的网</span><span style="font-family: 宋体">络编</span><span style="font-family: HiddenHorzOCR"><font face="Calibri">程</font></span><span style="font-family: 宋体">语</span><span style="font-family: 'MS Mincho'">言</span><font face="Calibri"><span style="font-family: HiddenHorzOCR">Java </span><span style="font-family: HiddenHorzOCR">与数据</span></font><span style="font-family: 宋体">库</span><span style="font-family: 'MS Mincho'">的</span><span style="font-family: 宋体">编</span><span style="font-family: 'MS Mincho'">程接口</span><span style="font-family: HiddenHorzOCR"><font face="Calibri">JDBC </font></span><span style="font-family: 宋体">规</span><span style="font-family: 'MS Mincho'">范，基于</span></font><span style="font-family: HiddenHorzOCR; font-size: 9.5pt"><font face="Calibri">客</font></span><span style="font-family: 宋体; font-size: 9.5pt">户</span><font face="Calibri"><span style="font-family: HiddenHorzOCR; font-size: 9.5pt">/</span><span style="font-family: HiddenHorzOCR; font-size: 9.5pt">服</span></font><span style="font-family: 宋体; font-size: 9.5pt">务</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">器体系</span><span style="font-family: 宋体; font-size: 9.5pt">结</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">构，</span><span style="font-family: 宋体; font-size: 9.5pt">实现访问</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">服</span><span style="font-family: 宋体; font-size: 9.5pt">务</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">器上异构数据</span><span style="font-family: 宋体; font-size: 9.5pt">库</span><span style="font-family: HiddenHorzOCR; font-size: 9.5pt"><font face="Calibri">:</font></span><span style="font-family: 宋体; font-size: 9.5pt">针对</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">一些</span><span style="font-family: 宋体; font-size: 9.5pt">实际</span><font size="3"><span style="font-family: HiddenHorzOCR"><font face="Calibri">的</font></span><span style="font-family: 宋体">应</span><span style="font-family: 'MS Mincho'">用需求和研究，采用</span><span style="font-family: 宋体">单进</span><span style="font-family: 'MS Mincho'">程多</span><span style="font-family: 宋体">线</span><span style="font-family: 'MS Mincho'">程技</span><span style="font-family: 宋体">术处</span><span style="font-family: 'MS Mincho'">理多用</span><span style="font-family: 宋体">户</span><span style="font-family: 'MS Mincho'">的并</span><span style="font-family: 宋体">发请</span><span style="font-family: 'MS Mincho'">求，</span></font><span style="font-family: HiddenHorzOCR; font-size: 9.5pt"><font face="Calibri">解决同步和异步</font></span><span style="font-family: 宋体; font-size: 9.5pt">执</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">行</span><span style="font-family: 宋体; font-size: 9.5pt">问题</span><font face="Calibri"><span style="font-family: HiddenHorzOCR; font-size: 9.5pt">:</span><span style="font-family: HiddenHorzOCR; font-size: 9.5pt">通</span></font><span style="font-family: 宋体; font-size: 9.5pt">过</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">加</span><span style="font-family: 宋体; font-size: 9.5pt">锁</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">机制有效地解决</span><span style="font-family: 宋体; font-size: 9.5pt">进</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">程</span><span style="font-family: 宋体; font-size: 9.5pt">对</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">共享</span><span style="font-family: 宋体; font-size: 9.5pt">资</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">源</span><font size="3"><span style="font-family: HiddenHorzOCR"><font face="Calibri">的同步</font></span><span style="font-family: 宋体">访问</span><font face="Calibri"><span style="font-family: HiddenHorzOCR">:</span><span style="font-family: HiddenHorzOCR">采用了基于套接字<span>(Socket)</span>的通信</span></font><span style="font-family: 宋体">实现进</span><span style="font-family: 'MS Mincho'">程</span><span style="font-family: 宋体">间</span><span style="font-family: 'MS Mincho'">的通信。最</span></font><span style="font-family: HiddenHorzOCR; font-size: 9.5pt"><font face="Calibri">后，就自己的切身体会</font></span><span style="font-family: 宋体; font-size: 9.5pt">对</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">将来的工作</span><span style="font-family: 宋体; font-size: 9.5pt">谈</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">了一点建</span><span style="font-family: 宋体; font-size: 9.5pt">设</span><span style="font-family: 'MS Mincho'; font-size: 9.5pt">性的意</span><span style="font-family: 宋体; font-size: 9.5pt">见</span><span style="font-family: HiddenHorzOCR; font-size: 9.5pt"><font face="Calibri">。</font></span></p>