Solr直接索引mysql数据

import org.apache.solr.client.solrj.SolrClient;
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.impl.HttpSolrClient;
import org.apache.solr.common.SolrInputDocument;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class SolrIndexer {
    public static void main(String[] args) {
        String solrUrl = "http://localhost:8983/solr/mycore";
        SolrClient solrClient = new HttpSolrClient.Builder(solrUrl).build();

        String jdbcUrl = "jdbc:mysql://localhost:3306/mydb";
        String username = "user";
        String password = "password";

        try (Connection conn = DriverManager.getConnection(jdbcUrl, username, password);
             Statement stmt = conn.createStatement();
             ResultSet rs = stmt.executeQuery("SELECT id, title, content FROM mytable")) {

            while (rs.next()) {
                SolrInputDocument document = new SolrInputDocument();
                document.addField("id", rs.getString("id"));
                document.addField("title", rs.getString("title"));
                document.addField("content", rs.getString("content"));
                solrClient.add(document);
            }

            solrClient.commit();
        } catch (SQLException | IOException | SolrServerException e) {
            e.printStackTrace();
        }
    }
}