Elasticsearch's Javaapi query dsl-queries

Elasticsearch's Javaapi query dsl-queries

Like the rest query dsl ,elasticsearch provides a complete Java query DSL. The Query Builder (factory) is QueryBuilders . Once you have your query ready , You can use the query API.

How to useQueryBuilders？仅仅就是加入下面的包：

Import org . Elasticsearch . Index . Query . querybuilders .*;

Note that you can easily print ( aka Debug ) The JSONgenerated by the query, using the toString() method

Any API that can be used to accept queries , such as Count and. QueryBuilder search）

The following examples illustrate several common query APIs:

Match Query

QueryBuilder=querybuilders. Matchquery ("name","Kimchy elasticsearch");

Multimatch Query

QueryBuilder=querybuilders. Multimatchquery ("Kimchy elasticsearch",//Text You is looking for  "User","message"// fields );

Boolean Query

QueryBuilderQB= querybuilders                    .Boolquery()                    .must(Termquery("Content", "Test1"))                    .must(Termquery("Content", "Test4"))                    .Mustnot(Termquery("Content", "Test2"))                    .should(Termquery("Content", "Test3"));

Boosting Query

querybuilders.Boostingquery()            .Positive(querybuilders.Termquery("Name","Kimchy"))            .Negative(querybuilders.Termquery("Name","Dadoonet"))            .Negativeboost(0.2f);

Range Query

QueryBuilderQB= querybuilders                    .Rangequery("Price")                    . from(5)                    . to(Ten)                    .Includelower(true)                    .Includeupper(false);

QueryString Query

QueryBuilder=querybuilders. queryString ("+kimchy-elasticsearch");

Term Query

QueryBuilder=querybuilders. Termquery ("name","Kimchy");

More like this (Field) Query (MLT and Mlt_field)
//MLT Queryquerybuilders.Morelikethisquery("Name.first", "Name.last")      // fields                .Liketext("text like this one")                 //Text                .Mintermfreq(1)                                 //Ignore Threshold                .maxqueryterms( A);                             //Max num of Terms                                                                //In generated queries//Mlt_field Queryquerybuilders.Morelikethisfieldquery("Name.first")              // only in single field                .Liketext("text like this one")                .Mintermfreq(1)                .maxqueryterms( A);

Elasticsearch's Javaapi query dsl-queries