Java使用elasticsearch-rest-high-level-client操作EleasticSearch

1、创建maven项目，pom.xml文件中增加如下配置

 

        
            org.elasticsearch
            elasticsearch
            6.2.1
        

        
            org.elasticsearch.client
            elasticsearch-rest-high-level-client
            6.2.1
        


        
            junit
            junit
            4.12
        

        
            com.alibaba
            fastjson
            1.2.44
        


    

2、测试代码如下：

package com.xuan.test;

import com.alibaba.fastjson.JSON;
import org.apache.http.HttpHost;
import org.elasticsearch.action.DocWriteResponse;
import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;
import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexResponse;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.*;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.sort.FieldSortBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.junit.Before;
import org.junit.Test;


import java.io.IOException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * FileName: TestES
 * Author:   xuan zongjun
 * Date:     2020/5/11 10:20
 * Description:
 */


public class TestES {

    private RestHighLevelClient client = null;

    @Before
    public void prepare() {
        // 创建Client连接对象
        String[] ips = {"127.0.0.1:9200"};
        HttpHost[] httpHosts = new HttpHost[ips.length];
        for (int i = 0; i < ips.length; i++) {
            httpHosts[i] = HttpHost.create( ips[i] );
        }
        RestClientBuilder builder = RestClient.builder( httpHosts );
        client = new RestHighLevelClient( builder );
    }

    /**
     * 创建索引 和 映射
     *
     * @throws IOException
     */
    @Test
    public void test1() throws IOException {

        //创建名称为blog2的索
        CreateIndexRequest request = new CreateIndexRequest( "blog1" );

        //设置映射 doc type名称
        request.mapping( "doc", " {\n" +
                " \t\"properties\": {\n" +
                "           \"name\": {\n" +
                "              \"type\": \"text\",\n" +
                "              \"analyzer\":\"ik_max_word\",\n" +
                "              \"search_analyzer\":\"ik_smart\"\n" +
                "           },\n" +
                "           \"description\": {\n" +
                "              \"type\": \"text\",\n" +
                "              \"analyzer\":\"ik_max_word\",\n" +
                "              \"search_analyzer\":\"ik_smart\"\n" +
                "           },\n" +
                "           \"studymodel\": {\n" +
                "              \"type\": \"keyword\"\n" +
                "           },\n" +
                "           \"price\": {\n" +
                "              \"type\": \"float\"\n" +
                "           }\n" +
                "        }\n" +
                "}", XContentType.JSON );


        CreateIndexResponse createIndexResponse = client.indices().create( request );
        System.out.println( JSON.toJSONString( createIndexResponse ) );

        //释放资源
        client.close();
    }

    /**
     * 删除索引
     */
    //删除索引库
    @Test
    public void testDeleteIndex() throws IOException {
        //删除索引请求对象
        DeleteIndexRequest deleteIndexRequest = new DeleteIndexRequest( "blog2" );
        //删除索引
        DeleteIndexResponse deleteIndexResponse = client.indices().delete( deleteIndexRequest );
        //删除索引响应结果
        boolean acknowledged = deleteIndexResponse.isAcknowledged();
        System.out.println( acknowledged );
    }

    /**
     * 插入文档
     */
    @Test
    public void testAddDocument() throws IOException {
        //准备json数据
        Map jsonMap = new HashMap<>();
        jsonMap.put( "name", "11spring cloud实战" );
        jsonMap.put( "description", "11本课程主要从四个章节进行讲解： 1.微服务架构入门 2.spring cloud基础入门 3.实战Spring Boot 4.注册中心eureka。" );
        jsonMap.put( "studymodel", "201001" );
        jsonMap.put( "price", 5.6f );

        //索引请求对象
        IndexRequest indexRequest = new IndexRequest( "blog1", "doc" ).id( "11" );
        //指定索引文档内容
        indexRequest.source( jsonMap );

        //索引响应对象
        IndexResponse index = client.index( indexRequest );

        //获取响应结果
        DocWriteResponse.Result result = index.getResult();
        System.out.println( result );


    }

    /**
     * 查询文档  根据ID查询
     */
    @Test
    public void getDocumentById() throws IOException {
        GetRequest getRequest = new GetRequest( "blog1", "doc", "11" );

        GetResponse response = client.get( getRequest );

        boolean exists = response.isExists();

        Map sourceAsMap = response.getSourceAsMap();
        System.out.println( sourceAsMap );

    }

    /**
     * 更新文档
     */
    @Test
    public void updateDocument() throws IOException {
        UpdateRequest updateRequest = new UpdateRequest( "blog1", "doc", "11" );

        Map map = new HashMap<>();
        map.put( "name", "spring cloud实战222" );
        updateRequest.doc( map );

        UpdateResponse update = client.update( updateRequest );

        RestStatus status = update.status();

        System.out.println( status );
    }

    /**
     * 删除文档
     */
    @Test
    public void deleteDocument() throws IOException {
        String id = "AXIDNJoC19Z06cvw7_Gv";
        DeleteRequest deleteRequest = new DeleteRequest( "blog2", "doc", id );

        DeleteResponse delete = client.delete( deleteRequest );

        System.out.println( delete.status() );
    }

    /**
     * 搜索管理  查询所有文档
     */
    @Test
    public void testSearchAll() throws IOException {

        SearchRequest searchRequest = new SearchRequest( "blog1" );
        searchRequest.types( "doc" );
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query( QueryBuilders.matchAllQuery() );
        //source源字段过虑
        searchSourceBuilder.fetchSource( new String[]{"name", "studymodel", "description"}, new String[]{} );
        searchRequest.source( searchSourceBuilder );
        SearchResponse searchResponse = client.search( searchRequest );
        SearchHits hits = searchResponse.getHits();
        long totalHits = hits.getTotalHits();

        System.out.println( "total=" + totalHits );

        SearchHit[] searchHits = hits.getHits();

        for (SearchHit searchHit : searchHits) {
            String index = searchHit.getIndex();
            System.out.println( "index=" + index );
            String id = searchHit.getId();
            System.out.println( "id=" + id );
            String sourceAsString = searchHit.getSourceAsString();
            System.out.println( sourceAsString );
            Map sourceAsMap = searchHit.getSourceAsMap();
            //String articleId = String.valueOf( sourceAsMap.get( "id" ) );
            String title = (String) sourceAsMap.get( "name" );
            String content = (String) sourceAsMap.get( "description" );
            //System.out.println("articleId="+articleId);
            System.out.println( "title=" + title );
            System.out.println( "content=" + content );
        }


    }

    /**
     * 搜索管理  分页查询
     */
    @Test
    public void testSearchByPage() throws IOException {
        //设置要查询的索引 和 type
        SearchRequest searchRequest = new SearchRequest( "blog1" );
        searchRequest.types( "doc" );
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query( QueryBuilders.matchAllQuery() );
        //分页查询，设置起始下标，从0开始
        searchSourceBuilder.from( 0 );
        //每页显示个数
        searchSourceBuilder.size( 2 );
        //source源字段过虑
        //searchSourceBuilder.fetchSource(new String[]{"title","id","content"},new String[]{}  );
        searchSourceBuilder.fetchSource( new String[]{"name", "studymodel", "description"}, new String[]{} );
        searchRequest.source( searchSourceBuilder );
        SearchResponse search = client.search( searchRequest );
        SearchHits hits = search.getHits();
        long totalHits = hits.getTotalHits();
        System.out.println( totalHits );
        for (SearchHit searchHit : hits.getHits()) {
            String sourceAsString = searchHit.getSourceAsString();
            System.out.println( sourceAsString );
        }
    }


    /**
     * 搜索管理  Term Query精确查找 ，在搜索时会整体匹配关键字，不再将关键字分词 ，
     * 下面的语句：查询title 包含 spring 的文档
     */
    @Test
    public void testSearchTerm() throws IOException {
        //创建查询，设置索引
        SearchRequest searchRequest = new SearchRequest( "blog1" );
        //设置type
        searchRequest.types( "doc" );
        //设置查询条件
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query( QueryBuilders.termQuery( "name", "spring" ) );
        //source源字段过虑
        //searchSourceBuilder.fetchSource(new String[]{"title","id","content"},new String[]{});
        searchSourceBuilder.fetchSource( new String[]{"name", "studymodel", "description"}, new String[]{} );
        searchRequest.source( searchSourceBuilder );

        SearchResponse search = client.search( searchRequest );
        SearchHits hits = search.getHits();
        long totalHits = hits.getTotalHits();
        System.out.println( "总条数：" + totalHits );

        for (SearchHit searchHit : hits.getHits()) {
            String sourceAsString = searchHit.getSourceAsString();
            System.out.println( sourceAsString );
        }
    }

    /**
     * 搜索管理 根据ID查询
     */
    @Test
    public void testSearchByID() throws IOException {
        //创建查询，设置索引
        SearchRequest searchRequest = new SearchRequest( "blog1" );
        //设置type
        searchRequest.types( "doc" );
        //设置查询条件
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        String[] ids = {"11", "12"};
        List stringList = Arrays.asList( ids );
        searchSourceBuilder.query( QueryBuilders.termsQuery( "_id", stringList ) );
        //source源字段过虑
        searchSourceBuilder.fetchSource( new String[]{"name", "studymodel", "description"}, new String[]{} );
        searchRequest.source( searchSourceBuilder );

        SearchResponse search = client.search( searchRequest );
        SearchHits hits = search.getHits();
        long totalHits = hits.getTotalHits();
        System.out.println( "总条数：" + totalHits );

        for (SearchHit searchHit : hits.getHits()) {
            String sourceAsString = searchHit.getSourceAsString();
            System.out.println( sourceAsString );
        }
    }

    /**
     * 搜索管理 match query 先分词后查找
     */
    @Test
    public void testSearchMatch() throws IOException {
        //创建查询，设置索引
        SearchRequest searchRequest = new SearchRequest( "blog1" );
        //设置type
        searchRequest.types( "doc" );
        //设置查询条件
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //匹配关键字
        searchSourceBuilder.query( QueryBuilders.matchQuery( "name", "spring开发" ).operator( Operator.OR ) );
        //source源字段过虑
        searchSourceBuilder.fetchSource( new String[]{"name", "studymodel", "description"}, new String[]{} );
        searchRequest.source( searchSourceBuilder );

        SearchResponse search = client.search( searchRequest );
        SearchHits hits = search.getHits();
        long totalHits = hits.getTotalHits();
        System.out.println( "总条数：" + totalHits );

        for (SearchHit searchHit : hits.getHits()) {
            String sourceAsString = searchHit.getSourceAsString();
            System.out.println( sourceAsString );
        }
    }


    /**
     * 搜索管理 match query 先分词后查找 minimum_should_match  （如果实现三个词至少有两个词匹配如何实现）
     */
    @Test
    public void testSearchMatchMinimnum() throws IOException {
        //创建查询，设置索引
        SearchRequest searchRequest = new SearchRequest( "blog1" );
        //设置type
        searchRequest.types( "doc" );
        //设置查询条件
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //匹配关键字
        searchSourceBuilder.query( QueryBuilders.matchQuery( "name", "spring开发" ).minimumShouldMatch( "60%" ) );
        //source源字段过虑
        searchSourceBuilder.fetchSource( new String[]{"name", "studymodel", "description"}, new String[]{} );
        searchRequest.source( searchSourceBuilder );

        SearchResponse search = client.search( searchRequest );
        SearchHits hits = search.getHits();
        long totalHits = hits.getTotalHits();
        System.out.println( "总条数：" + totalHits );

        for (SearchHit searchHit : hits.getHits()) {
            String sourceAsString = searchHit.getSourceAsString();
            System.out.println( sourceAsString );
        }
    }


    /**
     * 搜索管理 同时搜索多个Field
     */
    @Test
    public void testSearchMultiMatch() throws IOException {
        //创建查询，设置索引
        SearchRequest searchRequest = new SearchRequest( "blog1" );
        //设置type
        searchRequest.types( "doc" );
        //设置查询条件
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //匹配关键字
        MultiMatchQueryBuilder multiMatchQueryBuilder = QueryBuilders.multiMatchQuery( "Boot 开发", "name", "description" )
                .minimumShouldMatch( "50%" );
        multiMatchQueryBuilder.field( "name",10 );//提升boost 表示权重提升10倍

        searchSourceBuilder.query( multiMatchQueryBuilder );
        //source源字段过虑
        searchSourceBuilder.fetchSource( new String[]{"name", "studymodel", "description"}, new String[]{} );
        searchRequest.source( searchSourceBuilder );

        SearchResponse search = client.search( searchRequest );
        SearchHits hits = search.getHits();
        long totalHits = hits.getTotalHits();
        System.out.println( "总条数：" + totalHits );

        for (SearchHit searchHit : hits.getHits()) {
            String sourceAsString = searchHit.getSourceAsString();
            System.out.println( sourceAsString );
        }
    }

    /**
     * 搜索管理 布尔查询
     */
    @Test
    public void testSearchBoolean() throws IOException {
        //创建搜索请求对象
        SearchRequest searchRequest = new SearchRequest( "blog1" );
        //设置type
        searchRequest.types( "doc" );
        ////创建搜索源配置对象
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //source源字段过虑
        searchSourceBuilder.fetchSource( new String[]{"name", "studymodel", "description"}, new String[]{} );
        //multiQuery
        MultiMatchQueryBuilder multiMatchQueryBuilder = QueryBuilders.multiMatchQuery( "Boot 开发", "name", "description" )
                .minimumShouldMatch( "50%" );
        multiMatchQueryBuilder.field( "name",10 );//提升boost 表示权重提升10倍
        //TermQuery
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("studymodel", "201001");
        // 布尔查询
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
        boolQueryBuilder.must(multiMatchQueryBuilder);
        boolQueryBuilder.must(termQueryBuilder);
        //设置布尔查询对象
        searchSourceBuilder.query( boolQueryBuilder );
        //设置搜索源配置
        searchRequest.source( searchSourceBuilder );
        //搜索
        SearchResponse search = client.search( searchRequest );
        SearchHits hits = search.getHits();
        long totalHits = hits.getTotalHits();
        System.out.println( "总条数：" + totalHits );

        for (SearchHit searchHit : hits.getHits()) {
            String sourceAsString = searchHit.getSourceAsString();
            System.out.println( sourceAsString );
        }
    }


    /**
     * 搜索管理 过滤器
     */
    @Test
    public void testSearchFilter() throws IOException {
        //创建搜索请求对象
        SearchRequest searchRequest = new SearchRequest( "blog1" );
        //设置type
        searchRequest.types( "doc" );
        ////创建搜索源配置对象
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //source源字段过虑
        searchSourceBuilder.fetchSource( new String[]{"name", "studymodel", "description"}, new String[]{} );
        //multiQuery 多field查询
        MultiMatchQueryBuilder multiMatchQueryBuilder = QueryBuilders.multiMatchQuery( "Boot 开发", "name", "description" )
                .minimumShouldMatch( "50%" );
        multiMatchQueryBuilder.field( "name",10 );//提升boost 表示权重提升10倍
        //多Field查询，添加到搜索源配置对象中
        searchSourceBuilder.query(multiMatchQueryBuilder);

        //TermQuery
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("studymodel", "201001");
        //Term查询，添加到搜索源配置对象中
        searchSourceBuilder.query( termQueryBuilder );

        // 布尔查询
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
        boolQueryBuilder.must(searchSourceBuilder.query());

        //过虑
        boolQueryBuilder.filter(QueryBuilders.termQuery( "studymodel","201001" ));
        boolQueryBuilder.filter(QueryBuilders.rangeQuery( "price" ).gte( 5 ).lte( 100 ));

        //设置布尔查询对象
        searchSourceBuilder.query( boolQueryBuilder );
        //设置搜索源配置
        searchRequest.source( searchSourceBuilder );
        //搜索
        SearchResponse search = client.search( searchRequest );
        SearchHits hits = search.getHits();
        long totalHits = hits.getTotalHits();
        System.out.println( "总条数：" + totalHits );

        for (SearchHit searchHit : hits.getHits()) {
            String sourceAsString = searchHit.getSourceAsString();
            System.out.println( sourceAsString );
        }
    }

    /**
     * 排序
     * @throws IOException
     */
    @Test
    public void testSort() throws IOException {
        SearchRequest searchRequest = new SearchRequest("blog1");
        searchRequest.types("doc");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //source源字段过虑
        searchSourceBuilder.fetchSource(new String[]{"name","studymodel","price","description"},new String[]{});
        searchRequest.source(searchSourceBuilder);
        //布尔查询
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
        //过虑
        boolQueryBuilder.filter(QueryBuilders.rangeQuery("price").gte(0).lte(100));
        // 排序
        searchSourceBuilder.sort(new FieldSortBuilder("studymodel").order( SortOrder.DESC));
        searchSourceBuilder.sort(new FieldSortBuilder("price").order(SortOrder.ASC));
        //搜索
        SearchResponse searchResponse = client.search(searchRequest);
        SearchHits hits = searchResponse.getHits();
        SearchHit[] searchHits = hits.getHits();
        for (SearchHit hit : searchHits) {
            String sourceAsString = hit.getSourceAsString();
            System.out.println(sourceAsString);
        }

    }

    /**
     * 高亮显示
     * @throws IOException
     */
    @Test
    public void testHighlight() throws IOException {
        SearchRequest searchRequest = new SearchRequest("blog1");
        searchRequest.types("doc");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //source源字段过虑
        searchSourceBuilder.fetchSource(new String[]{"name","studymodel","price","description"},new String[]{});
        searchRequest.source(searchSourceBuilder);
        //匹配关键字
        MultiMatchQueryBuilder multiMatchQueryBuilder = QueryBuilders.multiMatchQuery("实战","name", "description");
        searchSourceBuilder.query(multiMatchQueryBuilder);
        //布尔查询
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
        boolQueryBuilder.must(searchSourceBuilder.query());
        //过虑
        boolQueryBuilder.filter(QueryBuilders.rangeQuery("price").gte(0).lte(100));
        //排序
        searchSourceBuilder.sort(new FieldSortBuilder("studymodel").order(SortOrder.DESC));
        searchSourceBuilder.sort(new FieldSortBuilder("price").order(SortOrder.ASC));
        //高亮设置
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.preTags("");//设置前缀
        highlightBuilder.postTags("");//设置后缀
        // 设置高亮字段
        highlightBuilder.fields().add(new HighlightBuilder.Field("name"));
        //highlightBuilder.fields().add(new HighlightBuilder.Field("description"));
        searchSourceBuilder.highlighter(highlightBuilder);

        SearchResponse searchResponse = client.search(searchRequest);
        SearchHits hits = searchResponse.getHits();
        SearchHit[] searchHits = hits.getHits();
        for (SearchHit hit : searchHits) {
            Map sourceAsMap = hit.getSourceAsMap();
            //名称
            String name = (String) sourceAsMap.get("name");
            //取出高亮字段内容
            Map highlightFields = hit.getHighlightFields();
            if(highlightFields!=null){
                HighlightField nameField = highlightFields.get("name");
                if(nameField!=null){
                    Text[] fragments = nameField.getFragments();
                    StringBuffer stringBuffer = new StringBuffer();
                    for (Text str : fragments) {
                        stringBuffer.append(str.string());
                    }
                    name = stringBuffer.toString();
                }
            }
            System.out.println("高亮=="+name);

            String sourceAsString = hit.getSourceAsString();
            System.out.println(sourceAsString);
        }
    }



}