将数据库的数据导入solr索引库中

在solr与tomcat整合文章中，我用的索引库是mycore，现在就以这个为例。

首先要准备jar包：solr-dataimporthandler-4.8.1.jar、solr-dataimporthandler-extras-4.8.1.jar和mysql-connector-java-5.0.7-bin.jar这三个包到solr的tomcat的webapps\solr\WEB-INF\lib下

在这个文件夹的conf下配置两个文件，添加一个文件。先配置solrconfig.xml。

在该文件下添加一个新节点。

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

在solrconfig.xml的同目录下创建data-config.xml。

配置：

<dataConfig>
    <dataSource type="JdbcDataSource"
              driver="com.mysql.jdbc.Driver"
              url="jdbc:mysql://localhost:3306/courseman"
              user="root"
              password="mysql" />
    <document>
        <entity name="student"
            query="SELECT * FROM student">
            <field column="id" name="id" />
            <field column="name" name="name" />
            <field column="gender" name="gender" />
            <field column="major" name="major" />
            <field column="grade" name="grade" />
        </entity>
    </document>
</dataConfig>

schemal.xml的配置

<?xml version="1.0" ?>
<!--
 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
 the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->

<schema name="example core one" version="1.1">

    <fieldtype name="string"  class="solr.StrField" sortMissingLast="true" omitNorms="true"/>
    <fieldType name="long" class="solr.TrieLongField" precisionStep="0" positionIncrementGap="0"/>
    <fieldType name="int" class="solr.TrieIntField" precisionStep="0" positionIncrementGap="0"/>

  <!-- general -->
  <field name="id"   type="int"    indexed="true"  stored="true"  />
  <field name="gender"  type="string"    indexed="true"  stored="true"   />
  <field name="name"      type="string"    indexed="true"  stored="true"   />
  <field name="major"     type="string"    indexed="true"  stored="true"   />
  <field name="grade"     type="string"    indexed="true"  stored="true"   />
  <field name="_version_" type="long"      indexed="true"  stored="true"/>

 <!-- field to use to determine and enforce document uniqueness. -->
 <uniqueKey>id</uniqueKey>

 <!-- field for the QueryParser to use when an explicit fieldname is absent -->
 <defaultSearchField>name</defaultSearchField>

 <!-- SolrQueryParser configuration: defaultOperator="AND|OR" -->
 <solrQueryParser defaultOperator="OR"/>
</schema>

默认的文件不是这样的，稍微改动了一下。

field 的type类型是根据fieldtype 的name定义的。class是solr自定义的不能更改。

其他的一些以后再解释。

现在可以将数据库的数据导入solr了。

点击Execute就可以了。

数据库的数据导进来了。

数据库的表。

数据库表结构。