Pass Json string in body to query solr using Solrj

Question

I am using httpclient to query solr server from java code. Now I just want to convert all of my code using solrj library. I am not able to find any proper documentation for it. My existing code is like this

HttpURLConnection conn = (HttpURLConnection) new URL(url.toString()).openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Type", "application/json");
conn.setRequestProperty("Accept", "*/*");
conn.setInstanceFollowRedirects(false);
OutputStream os = conn.getOutputStream();
os.write(inputJson.getBytes());
os.flush();
os.close();
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
//read resp from rd

How to do the same using solrj? Here is documentation for the same to do by using curl JSON Request API

I want to send inputJson String as request body. This Json String may contain whatever dynamic key values. It is doable as I have shown using http rest call. But how to do same using solrj?

user218867 user218867 · Accepted Answer · 2015-12-22T06:27:26

Here is a simple query example via SolrJ:

package eric.search.solr.solrj;

import java.io.IOException;

import org.apache.solr.client.solrj.SolrClient;
import org.apache.solr.client.solrj.SolrQuery;
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.impl.HttpSolrClient;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocumentList;

/**
 * SolrJ test - solr5
 * 
 * @author eric
 * @date Aug 7, 2015 3:56:08 PM
 */
public class Solrj5Test {
    // query via edismax - test
    public static void queryEdismaxTest() {
        String coreUrl = "http://localhost:8983/solr/search_cn";
        SolrClient client;
        try {
            // create client
            client = new HttpSolrClient(coreUrl);

            // create query,
            SolrQuery query = new SolrQuery();

            query.setQuery("java"); // q
            query.addFilterQuery("authors:布鲁斯"); // fq
            // query.setFields("id", "cn_name", "en_name", "authors"); // fl
            query.setStart(0); // start
            query.setRows(10); // rows
            query.set("defType", "edismax"); // defType
            query.set("qf", "cn_name"); // qf

            // get response
            QueryResponse response = client.query(query);

            // get documents
            SolrDocumentList docList = response.getResults();

            System.out.printf("doc count: %d\n", docList.size());
            client.close();
        } catch (SolrServerException | IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        queryEdismaxTest();
    }
}

SolrJ will wrap result into Java objects, if u want to get the raw output as json. Then I suggest u to use the tools like HttpClient to retrieve the result via url of solr web, then parse the result via Jackson into json tree JsonNode.

Pass Json string in body to query solr using Solrj

1 Answers