数据导入

<requestHandler name="/dataimport" class="org.apache.solr.handler.dataimport.DataImportHandler">
  <lst name="defaults">
    <str name="config">DIHconfig.xml</str>
  </lst>
</requestHandler>

同文件夹下创建一个DIHconfig.xml

<dataConfig>
  <dataSource driver="org.hsqldb.jdbcDriver" url="jdbc:hsqldb:./example-DIH/hsqldb/ex" 
    user="sa" password="secret"/> 
  <document> 
    <entity name="item" query="select * from item"
            deltaQuery="select id from item where last_modified > '${dataimporter.last_index_time}'"> 
      <field column="NAME" name="name" />

      <entity name="feature"
              query="select DESCRIPTION from FEATURE where ITEM_ID='${item.ID}'"
              deltaQuery="select ITEM_ID from FEATURE where last_modified > '${dataimporter.last_index_time}'"
              parentDeltaQuery="select ID from item where ID=${feature.ITEM_ID}"> 
        <field name="features" column="DESCRIPTION" />
      </entity>

      <entity name="item_category"
              query="select CATEGORY_ID from item_category where ITEM_ID='${item.ID}'"
              deltaQuery="select ITEM_ID, CATEGORY_ID from item_category where last_modified > '${dataimporter.last_index_time}'"
              parentDeltaQuery="select ID from item where ID=${item_category.ITEM_ID}">
        <entity name="category"
                query="select DESCRIPTION from category where ID = '${item_category.CATEGORY_ID}'"
                deltaQuery="select ID from category where last_modified > '${dataimporter.last_index_time}'"
                parentDeltaQuery="select ITEM_ID, CATEGORY_ID from item_category where CATEGORY_ID=${category.ID}">
          <field column="description" name="cat" />
        </entity>
      </entity>
    </entity>
  </document>
</dataConfig>

<dataConfig>
  <dataSource driver="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost:3306/shop?characterEncoding=utf-8" 
    user="root" password="root"/> 
  <document> 
	<entity name="item" query="select * from tb_item">
		<field  name="id" column="id" />
		<field name="item_title" column="title"/>
		<field name="item_sell_point" column="sell_point"/>
		<field name="item_price" column="price"/>
		<field name="item_image" column="image"/>
		<entity name = "category" query="select name from tb_item_cat where id = '${item.cid}'" >
			<field name="item_category_name" column="name" />    
		</entity>
	</entity>
  </document>
</dataConfig>