一 es7.x

1.1 配置pom文件

 <dependencies>
        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>7.8.0</version>
        </dependency>
        <!-- elasticsearch的客户端 -->
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <version>7.8.0</version>
        </dependency>
        <!-- elasticsearch依赖2.x的log4j -->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.8.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.8.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.9</version>
        </dependency>
        <!-- junit单元测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <!-- lombok -->
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.24</version>
            </dependency>
        <!--lombok -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>



    </dependencies>

1.2 构建mapping工具类

public class EsUserMapping {

    public static XContentBuilder createMapping() throws IOException {
        XContentBuilder builder= XContentFactory.jsonBuilder().startObject()
              .startObject("user")
                 .startObject("properties")
                .startObject("title").field("type","text").endObject()
              .startObject("name").field("type","keyword").endObject()
            .startObject("age").field("type","int").endObject()
            .startObject("createTime").field("type","date").field("format", "yyyy-MM-dd HH:mm:ss").endObject()
        .endObject()
   .endObject()
     .endObject();
    //    builder.endObject();
        System.out.println("mapping:" + builder.toString());
        //CreateIndexRequest index=new CreateIndexRequest("user");
        return builder;
    }
}

1.3 创建索引以及mapping

package com.ljf.demo;

import org.apache.http.HttpHost;
import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;
import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.PutMappingRequest;
import org.elasticsearch.common.xcontent.XContentType;

import java.io.IOException;

/**
 * @ClassName: EsCreateUserIndexMapping
 * @Description: TODO
 * @Author: admin
 * @Date: 2023/05/05 10:19:46 
 * @Version: V1.0
 **/
public class EsCreateUserIndexMapping {
    public static void main(String[] args) throws IOException {
        String indexName="user";
        RestHighLevelClient esClient = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );

        //1.先创建索引
       if(createEsIndex(esClient,indexName)){
           //2.定义mapping
           createEsMapping(esClient,indexName);
           System.out.println("成功......");
       }
       else{
           System.out.println("失败......");
       }
    esClient.close();
    }
    public static boolean createEsIndex(RestHighLevelClient esClient,String indexName) throws IOException {
        // 创建索引
        CreateIndexRequest request = new CreateIndexRequest(indexName);
        CreateIndexResponse createIndexResponse =
                esClient.indices().create(request,RequestOptions.DEFAULT);

        // 响应状态
        boolean acknowledged = createIndexResponse.isAcknowledged();
        System.out.println("索引操作 ：" + acknowledged);
        return acknowledged;
    }
    public static boolean createEsMapping(RestHighLevelClient esClient,String indexName) throws IOException {
        // 创建索引
        PutMappingRequest requestMapping=new PutMappingRequest(indexName);
        requestMapping.source("{\n" +
                "        \"properties\": {\n" +
                "            \"uname\": {\n" +
                "                \"type\": \"text\",\n" +
                "                \"index\": true\n" +
                "            },\n" +
                "            \"sex\": {\n" +
                "                \"type\": \"text\",\n" +
                "                \"index\": false\n" +
                "            },\n" +
                "            \"age\": {\n" +
                "                \"type\": \"long\",\n" +
                "                \"index\": true\n" +
                "            },\n" +
                "            \"createTime\": {\n" +
                "                \"type\": \"date\",\n" +
                "                \"format\": \"yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_millis\",\n" +
                "                \"index\": true\n" +
                "            }\n" +
                "        }\n" +
                "}", XContentType.JSON);
        AcknowledgedResponse putMappingResponse = esClient.indices().putMapping(requestMapping, RequestOptions.DEFAULT);//执行请求
        // 响应状态
        boolean acknowledged2 = putMappingResponse.isAcknowledged();
        if(acknowledged2) {
            System.out.println("mapping设置成功！");
        }
        return acknowledged2;
    }
}

截图：

1.4 查看索引结构

http://localhost:9200/user/_mapping

1.5 添加数据

package com.ljf.demo;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.http.HttpHost;

import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;

/**
 * @ClassName: EsDocAdd
 * @Description: TODO
 * @Author: admin
 * @Date: 2023/05/03 09:14:35 
 * @Version: V1.0
 **/
public class EsDocAdd {
    public static void main(String[] args) throws Exception {

        RestHighLevelClient esClient = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );

        // 插入数据
        IndexRequest request = new IndexRequest();
        request.index("user").id("1001");

             User user=new com.ljf.demo.User();
             user.setTitle("zhongguo gongchandang wangsui");
             user.setName("jurfliu");
             user.setAge(34);
             user.setCreatTime("2023-02-01 12:03:04");

        // 向ES插入数据，必须将数据转换位JSON格式
        ObjectMapper mapper = new ObjectMapper();
        String userJson = mapper.writeValueAsString(user);
        request.source(userJson, XContentType.JSON);

        IndexResponse response = esClient.index(request, RequestOptions.DEFAULT);

        System.out.println(response.getResult());

        esClient.close();
    }
}

查询数据

1.6 删除索引

public class EsDeleteIndex {
    public static void main(String[] args) throws Exception {

        RestHighLevelClient esClient = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );

        // 查询索引
        DeleteIndexRequest request = new DeleteIndexRequest("user");

        AcknowledgedResponse response = esClient.indices().delete(request, RequestOptions.DEFAULT);

        // 响应状态
        System.out.println(response.isAcknowledged());

        esClient.close();
    }
}

截图：