Java API 整合 ES Query

TechStyle 2021-09-01

424

Maven Dependency

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>


    <groupId>org.fool</groupId>
    <artifactId>helloes</artifactId>
    <version>1.0-SNAPSHOT</version>


    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>


    <dependencies>
        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>7.13.4</version>
        </dependency>


        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <version>7.13.4</version>
        </dependency>


        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.14.1</version>
        </dependency>


        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.14.1</version>
        </dependency>


        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.12.5</version>
        </dependency>


        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
        </dependency>


        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>


    </dependencies>


</project>

全量查询

ESDocQueryAll.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;


import java.io.IOException;


public class ESDocQueryAll {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        searchRequest.source(new SearchSourceBuilder().query(QueryBuilders.matchAllQuery()));


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        System.out.println(searchResponse.getTook());


        SearchHits hits = searchResponse.getHits();
        System.out.println(hits.getTotalHits());
        hits.forEach(p -> System.out.println(p.getSourceAsString()));


        client.close();
    }
}

Console Output

Term 查询

ESDocQueryTerm.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;


import java.io.IOException;


public class ESDocQueryTerm {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        searchRequest.source(new SearchSourceBuilder().query(QueryBuilders.termQuery("age", "40")));


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        System.out.println(searchResponse.getTook());


        SearchHits hits = searchResponse.getHits();
        System.out.println(hits.getTotalHits());
        hits.forEach(p -> System.out.println(p.getSourceAsString()));


        client.close();
    }
}

Console Output

分页查询

ESDocQueryPagination.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;


import java.io.IOException;


public class ESDocQueryPagination {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        SearchSourceBuilder builder = new SearchSourceBuilder().query(QueryBuilders.matchAllQuery());
        builder.from(0);
        builder.size(3);
        searchRequest.source(builder);


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        System.out.println(searchResponse.getTook());


        SearchHits hits = searchResponse.getHits();
        System.out.println(hits.getTotalHits());
        hits.forEach(p -> System.out.println(p.getSourceAsString()));


        client.close();
    }
}

Console Output

数据排序

ESDocQuerySort.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.sort.SortOrder;


import java.io.IOException;


public class ESDocQuerySort {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        SearchSourceBuilder builder = new SearchSourceBuilder().query(QueryBuilders.matchAllQuery());
        builder.sort("age", SortOrder.DESC);
        searchRequest.source(builder);


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        System.out.println(searchResponse.getTook());


        SearchHits hits = searchResponse.getHits();
        System.out.println(hits.getTotalHits());
        hits.forEach(p -> System.out.println(p.getSourceAsString()));


        client.close();
    }
}

Console Output

数据过滤

ESDocQueryFilter.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;


import java.io.IOException;


public class ESDocQueryFilter {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        SearchSourceBuilder builder = new SearchSourceBuilder().query(QueryBuilders.matchAllQuery());


        String[] includes = {"name"};
        String[] excludes = {};
        builder.fetchSource(includes, excludes);


        searchRequest.source(builder);


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        System.out.println(searchResponse.getTook());


        SearchHits hits = searchResponse.getHits();
        System.out.println(hits.getTotalHits());
        hits.forEach(p -> System.out.println(p.getSourceAsString()));


        client.close();
    }
}

Console Output

Bool 查询

ESDocQueryCombination.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;


import java.io.IOException;


public class ESDocQueryCombination {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();


        // and
        // boolQueryBuilder.must(QueryBuilders.matchQuery("age", 30));
        // boolQueryBuilder.must(QueryBuilders.matchQuery("sex", "female"));


        // or
        boolQueryBuilder.should(QueryBuilders.matchQuery("age", 30));
        boolQueryBuilder.should(QueryBuilders.matchQuery("age", 40));


        searchSourceBuilder.query(boolQueryBuilder);
        searchRequest.source(searchSourceBuilder);


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        System.out.println(searchResponse.getTook());


        SearchHits hits = searchResponse.getHits();
        System.out.println(hits.getTotalHits());
        hits.forEach(p -> System.out.println(p.getSourceAsString()));


        client.close();
    }
}

Console Output

范围查询

ESDocQueryRange.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.RangeQueryBuilder;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;


import java.io.IOException;


public class ESDocQueryRange {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        RangeQueryBuilder rangeQueryBuilder = QueryBuilders.rangeQuery("age");


        rangeQueryBuilder.gte(30);
        rangeQueryBuilder.lte(50);


        searchSourceBuilder.query(rangeQueryBuilder);
        searchRequest.source(searchSourceBuilder);


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        System.out.println(searchResponse.getTook());


        SearchHits hits = searchResponse.getHits();
        System.out.println(hits.getTotalHits());
        hits.forEach(p -> System.out.println(p.getSourceAsString()));


        client.close();
    }
}

Console Output

模糊查询

ESDocQueryFuzzy.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.unit.Fuzziness;
import org.elasticsearch.index.query.FuzzyQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;


import java.io.IOException;


public class ESDocQueryFuzzy {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        FuzzyQueryBuilder fuzzyQueryBuilder = QueryBuilders.fuzzyQuery("name", "caocao").fuzziness(Fuzziness.ONE);


        searchSourceBuilder.query(fuzzyQueryBuilder);
        searchRequest.source(searchSourceBuilder);


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        System.out.println(searchResponse.getTook());


        SearchHits hits = searchResponse.getHits();
        System.out.println(hits.getTotalHits());
        hits.forEach(p -> System.out.println(p.getSourceAsString()));


        client.close();
    }
}

Console Output

高亮查询

ESDocQueryHighlight.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;


import java.io.IOException;


public class ESDocQueryHighlight {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "caocao");


        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.preTags("<font color='red'>");
        highlightBuilder.postTags("</font>");
        highlightBuilder.field("name");


        searchSourceBuilder.highlighter(highlightBuilder);
        searchSourceBuilder.query(termQueryBuilder);
        searchRequest.source(searchSourceBuilder);


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        System.out.println(searchResponse.getTook());


        SearchHits hits = searchResponse.getHits();
        System.out.println(hits.getTotalHits());
        hits.forEach(p -> {
            System.out.println(p.getSourceAsString());
            System.out.println(p.getHighlightFields());
        });


        client.close();
    }
}

Console Output

聚合查询

ESDocQueryAggregation.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.metrics.MaxAggregationBuilder;
import org.elasticsearch.search.aggregations.metrics.ParsedMax;
import org.elasticsearch.search.builder.SearchSourceBuilder;


import java.io.IOException;


public class ESDocQueryAggregation {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();


        MaxAggregationBuilder maxAggregationBuilder = AggregationBuilders.max("maxAge").field("age");


        searchSourceBuilder.aggregation(maxAggregationBuilder);


        searchRequest.source(searchSourceBuilder);


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        System.out.println(searchResponse);


        Aggregations aggregations = searchResponse.getAggregations();
        ParsedMax terms = aggregations.get("maxAge");
        System.out.println(terms.getValue());


        client.close();
    }
}

Console Output

分组统计

ESDocQueryGroup.java

package org.fool.es.test;


import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.bucket.terms.ParsedLongTerms;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
import org.elasticsearch.search.builder.SearchSourceBuilder;


import java.io.IOException;
import java.util.List;


public class ESDocQueryGroup {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1", 9200, "http"))
        );


        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("user");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();


        TermsAggregationBuilder termsAggregationBuilder = AggregationBuilders.terms("ageGroup").field("age");


        searchSourceBuilder.aggregation(termsAggregationBuilder);


        searchRequest.source(searchSourceBuilder);


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);


        Aggregations aggregations = searchResponse.getAggregations();
        ParsedLongTerms terms = aggregations.get("ageGroup");
        List<? extends Terms.Bucket> buckets = terms.getBuckets();
        for (Terms.Bucket bucket : buckets) {
            System.out.println(bucket.getKey() + ":" + bucket.getDocCount());
        }


        client.close();
    }
}

Console Output

泰克风格只讲干货不弄玄虚

java

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Java API 整合 ES Query

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