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

 <dependencies>

        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>6.2.1</version>
        </dependency>

        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <version>6.2.1</version>
        </dependency>


        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.44</version>
        </dependency>


    </dependencies>

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" +