solr MySQL database connection

A, solr search server

1.solr Overview

      Solr is an open source search platform for building search applications. itBuilt on top of Lucene (full-text search engine). Solr is an enterprise-class, fast and highly scalable. Applications built using Solr very complex, high performance can be provided.

2.solr download and install

solr official website address: https://lucene.apache.org/solr/

3. solr Prerequisites

Add Core choice to create a
command: window system cmd, in the bin directory of solr

cd E:\solr\solr-7.7.2\bin
//test 是我的文件夹名
solr create -c test

1. The E: \ solr \ solr-7.7.2 \ dist ( my own directory path) in the jar: solr-dataimporthandler-7.7.2.jar and solr-dataimporthandler-extras-7.7.2.jar
   copied to E: \ solr \ solr-7.7.2 \ server \ solr-webapp \ webapp \ WEB-INF \ lib ( I own directory path)

2. Download mysql-connector-java-5.1.30.jar copied to E (by yourself maven download): \ solr \ solr-7.7.2 \ server \ solr-webapp \ webapp \ under WEB-INF \ lib directory.

3. The E: \ solr \ solr-7.7.2 \ server \ under solr \ test \ conf directory is managed-schema file name modified to schema.xml

Second, the MySQL database connection

1. New data-config.xml file

data-config.xml is the configuration file for the database table
my data-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<dataConfig>
    <!-- 数据库信息 -->
    <dataSource type="JdbcDataSource" 
        driver="com.mysql.jdbc.Driver" 
        url="jdbc:mysql://127.0.0.1:3306/test" 
        user="root" password="123456"/>
    <document>
         <entity name="users" pk="id"  
		        query="select * from users"
                deltaQuery="select * from users where name > '${dataimporter.last_index_time}'">
                <!-- 对应数据库表的字段 --> 
            <field column="name" name="name" />
            <field column="age" name="age" />
        </entity>
    </document>
</dataConfig>

2. Modify solrconfig.xml

Registration data-config.xml file information in the solrconfig.xml:

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

3. Modify schema.xml

Add Content:

<field name="name" type="string" indexed="true" required="false" stored="true"/> 
<field name="age" type="string" indexed="true" required="true" stored="true"/>

4. Restart and view the data

Stop solr: solr stop _all
start solr: solr start

1. Import Data

2. Results

3. database corresponding

Third, stepped pit

1. Importing data is not successful?
   ps: In the data-config.xml configuration file, my

<field column="age" name="age" />

The value of the name value before I named myself as: name = "t_age"
and the database field is not the same, it has been queried data.