我使用ucanaccess从大约 20 个 mdb 文件中完成了以下数据导入设置:
<?xml version="1.0" encoding="UTF-8" ?>
<dataConfig>
<dataSource name="a" driver="net.ucanaccess.jdbc.UcanaccessDriver" type="JdbcDataSource" url="jdbc:ucanaccess://E:/feqh/main.mdb;memory=false" />
<dataSource name="a1" driver="net.ucanaccess.jdbc.UcanaccessDriver" type="JdbcDataSource" url="jdbc:ucanaccess://E:/feqh/A/1.mdb;memory=false" />
<dataSource name="a2" driver="net.ucanaccess.jdbc.UcanaccessDriver" type="JdbcDataSource" url="jdbc:ucanaccess://E:/feqh/A/2.mdb;memory=false" />
<dataSource name="a3" driver="net.ucanaccess.jdbc.UcanaccessDriver" type="JdbcDataSource" url="jdbc:ucanaccess://E:/feqh/A/3.mdb;memory=false" />
<dataSource name="a4" driver="net.ucanaccess.jdbc.UcanaccessDriver" type="JdbcDataSource" url="jdbc:ucanaccess://E:/feqh/A/4.mdb;memory=false" />
<!-- and so on -->
<document>
<entity name="Book" dataSource="a"
query="select bkid AS id, bkid AS BookID,bk AS BookTitle, betaka AS BookInfo, cat as cat from 0bok">
<field column="id" name="id"/>
<field column="BookID" name="BookID"/>
<field column="BookTitle" name="BookTitle"/>
<field column="cat" name="cat"/>
<entity name="Category" dataSource="a"
query="select name as CatName, catord as CatWeight, Lvl as CatLevel from 0cat where id = ${Book.CAT}">
<field column="CatName" name="CatName"/>
<field column="CatWeight" name="CatWeight"/>
<field column="CatLevel" name="CatLevel"/>
</entity>
<entity name="Pages" dataSource="a5" onError="continue"
query="SELECT nass AS PageContent, page AS pageNum FROM b${Book.ID} ORDER BY page">
<field column="PageContent" name="PageContent" />
<field column="PageNum" name="PageNum" />
<entity name="Titles" dataSource="a5" onError="continue"
query="SELECT * FROM t${Book.ID} WHERE id = ${Pages.PAGE} ORDER BY sub">
<field column="ID" name="TitleID"/>
<field column="TIT" name="PageTitle"/>
<field column="SUB" name="TitleWeight"/>
<field column="LVL" name="TitleLevel"/>
</entity>
</entity>
</entity>
</document>
</dataConfig>
每次我喜欢从不同的数据源导入时,我都必须手动更改 Pages 和 Titles 实体的 dataSource 属性,然后在不清理的情况下执行数据导入。现在有超过 600 个 mdb 文件,这不是一个明智的选择。有没有办法在配置中进行循环?换句话说:有一个主要实体或 mdb 文件来处理所有书籍的标题和类别,然后每本书都有自己的 mdb 文件,以它的 id 命名,例如 245.mdb 用于 id 245 的书,所以我需要更改数据源动态地用于页面和标题。