ElasticSearch full text search using Java API
After crawling the Internet for hours, I've managed to figure it out, with some help from the javadocs. The most important is the interface *QueryBuilder*
, and its implementing classes. I used FieldQueryBuilder
for my query, which in shown in the setQuery
method below.
SearchResponse response = client.prepareSearch("mongoindex")
.setSearchType(SearchType.QUERY_AND_FETCH)
.setQuery(fieldQuery("name", "test name"))
.setFrom(0).setSize(60).setExplain(true)
.execute()
.actionGet();
SearchHit[] results = response.getHits().getHits();
for (SearchHit hit : results) {
System.out.println(hit.getId()); //prints out the id of the document
Map<String,Object> result = hit.getSource(); //the retrieved document
}
With the resulting Map object, you can simply call the get
method to retrieve the relevant data.
Wei Hao
Graduated with Cum Laude in BSc Information Systems from Singapore Management University
Updated on June 19, 2022Comments
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Wei Hao almost 2 years
I've recently started exploring the world of search, and am trying to use ES as the index for my MongoDB. I've managed to integrate them successfully, but I find the search API rather complex and confusing. The Java API is not too helpful either. I am able to find exact matches, but how do I do full-text searches? Here is my code:
Settings settings = ImmutableSettings.settingsBuilder() .put("cluster.name", "elasticsearch").build(); Client client = new TransportClient(settings) .addTransportAddress(new InetSocketTransportAddress("host-ip", 9300)); SearchResponse response = client.prepareSearch("mongoindex") .setSearchType(SearchType.QUERY_AND_FETCH) .setQuery(termQuery("name", "*name*")) .setFrom(0).setSize(60).setExplain(true) .execute() .actionGet();
I have no problems finding
"name":"testname"
using.setQuery(termQuery("name", "testname"))
, but"name":"this is a test name"
doesn't work with the above example. What am I doing wrong? -
Wei Hao over 11 yearsif that is the case, how could i search for a phrase (or substring) within text?
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mjhm over 11 yearsI would guess using a query_string elasticsearch.org/guide/reference/query-dsl/…
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Wei Hao over 11 yearsUnfortunately, that is not in Java, which is really the crux of my question, as I am using the Java API. I've seen the link but I can't translate it into Java.
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mjhm over 11 yearsHere's the source: github.com/elasticsearch/elasticsearch/blob/master/src/main/…