springboot集成elasticsearch7的图文方法

1.创建项目

修改依赖版本

2.创建配置文件

package com.huanmingjie.elasticsearch.config;

import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ElasticsearchClientConfig {

    @Bean
    public RestHighLevelClient restHighLevelClient() {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost("localhost", 9200, "http")));
        return client;
    }

}

3.测试

3.1索引操作

1.创建索引

2.判断索引是否存在

3.删除索引

索引操作代码

package com.huanmingjie.elasticsearch;

import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.CreateIndexRequest;
import org.elasticsearch.client.indices.CreateIndexResponse;
import org.elasticsearch.client.indices.GetIndexRequest;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import java.io.IOException;

@SpringBootTest
class ElasticsearchApplicationTests {

    @Autowired
    private RestHighLevelClient restHighLevelClient;

    //创建索引 PUT zoomy_index
    @Test
    void createIndex() throws IOException {
        CreateIndexRequest request = new CreateIndexRequest("zoomy_index");
        restHighLevelClient.indices().create(request, RequestOptions.DEFAULT);
    }

    //判断索引是否存在
    @Test
    void getIndex() throws IOException {
        GetIndexRequest request = new GetIndexRequest("zoomy_index");
        boolean exists = restHighLevelClient.indices().exists(request, RequestOptions.DEFAULT);
        System.out.println(exists);
    }

    //删除索引
    @Test
    void deleteIndex() throws IOException {
        DeleteIndexRequest request = new DeleteIndexRequest("zoomy_index");
        AcknowledgedResponse delete = restHighLevelClient.indices().delete(request, RequestOptions.DEFAULT);
        System.out.println(delete.isAcknowledged());
    }
}

3.2文档操作

创建实体类

package com.huanmingjie.elasticsearch.pojo;

import org.springframework.stereotype.Component;

@Component
public class User {
    private String name;
    private int age;

    public User() {
    }

    public User(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

1.添加文档

2.获取文档，判断是否存在

3.获取文档信息

4.更新文档

5.删除文档

3.3实战操作

批量创建数据

查询

package com.huanmingjie.elasticsearch;

import com.alibaba.fastjson.JSON;
import com.huanmingjie.elasticsearch.pojo.User;
import com.huanmingjie.elasticsearch.utils.ESConstant;
import net.minidev.json.JSONObject;
import org.apache.lucene.util.QueryBuilder;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
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.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.Request;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.CreateIndexRequest;
import org.elasticsearch.client.indices.GetIndexRequest;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.MatchAllQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.FetchSourceContext;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import javax.naming.directory.SearchResult;
import java.io.IOException;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;

@SpringBootTest
class ElasticsearchApplicationTests {

    @Autowired
    private RestHighLevelClient restHighLevelClient;

    //创建索引 PUT zoomy_index
    @Test
    void createIndex() throws IOException {
        CreateIndexRequest request = new CreateIndexRequest("zoomy_index");
        restHighLevelClient.indices().create(request, RequestOptions.DEFAULT);
    }

    //判断索引是否存在
    @Test
    void getIndex() throws IOException {
        GetIndexRequest request = new GetIndexRequest("zoomy_index");
        boolean exists = restHighLevelClient.indices().exists(request, RequestOptions.DEFAULT);
        System.out.println(exists);
    }

    //删除索引
    @Test
    void deleteIndex() throws IOException {
        DeleteIndexRequest request = new DeleteIndexRequest("zoomy_index");
        AcknowledgedResponse delete = restHighLevelClient.indices().delete(request, RequestOptions.DEFAULT);
        System.out.println(delete.isAcknowledged());
    }

    //添加文档 PUT zoomy_index/_doc/1
    @Test
    void addDocument() throws IOException {
        User user = new User("zoomy", 21);
        IndexRequest request = new IndexRequest("zoomy_index");
        request.id("1");
        request.timeout(TimeValue.timeValueSeconds(1));
        request.source(JSON.toJSONString(user), XContentType.JSON);
        //客户端发送请求,获取响应结果
        IndexResponse indexResponse = restHighLevelClient.index(request, RequestOptions.DEFAULT);
        System.out.println(indexResponse.toString());
        //命令返回的状态
        System.out.println(indexResponse.status());
    }

    //获取文档，判断是否存在
    @Test
    void exitDocument() throws IOException {
        GetRequest request = new GetRequest("zoomy_index", "1");
        //不获取返回的_source的上下文，效率更高
        request.fetchSourceContext(new FetchSourceContext(false));
        request.storedFields("_none_");
        boolean exists = restHighLevelClient.exists(request, RequestOptions.DEFAULT);
        System.out.println(exists);
    }

    //获取文档信息
    @Test
    void getDocument() throws IOException {
        GetRequest request = new GetRequest("zoomy_index", "1");
        GetResponse getResponse = restHighLevelClient.get(request, RequestOptions.DEFAULT);
        //打印文档内容
        System.out.println(getResponse.getSourceAsString());
        //返回全部内容
        System.out.println(getResponse);

    }

    //更新文档 POST zoomy_index/_doc/1/_update
    @Test
    void updateDocument() throws IOException {
        UpdateRequest request = new UpdateRequest("zoomy_index", "1");
        request.timeout(TimeValue.timeValueSeconds(1));
        User user = new User("zoomy", 22);
        request.doc(JSON.toJSONString(user), XContentType.JSON);
        UpdateResponse updateResponse = restHighLevelClient.update(request, RequestOptions.DEFAULT);
        System.out.println(updateResponse.status());
    }

    //删除文档
    @Test
    void deleteDocument() throws IOException {
        DeleteRequest request = new DeleteRequest("zoomy_index", "1");

        DeleteResponse deleteResponse = restHighLevelClient.delete(request, RequestOptions.DEFAULT);
        System.out.println(deleteResponse.status());
    }

    //批量处理数据
    @Test
    void bulkRequest() throws IOException {
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.timeout(TimeValue.timeValueSeconds(10));

        ArrayList<User> userList = new ArrayList<>();
        userList.add(new User("zoomy1", 21));
        userList.add(new User("zoomy2", 22));
        userList.add(new User("zoomy3", 23));

        for (int i = 0; i < userList.size(); i++) {
            bulkRequest.add(
                    new IndexRequest("zoomy_index")
                            .id("" + (i + 1))
                            .source(JSON.toJSONString(userList.get(i)), XContentType.JSON));
        }
        BulkResponse bulkItemResponses = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
        System.out.println(bulkItemResponses.hasFailures());
    }

    //批量处理数据
    @Test
    void searchRequest() throws IOException {
        SearchRequest searchRequest = new SearchRequest(ESConstant.ZOOMY_INDEX);
        //构建搜索条件
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

        //查询条件QueryBuilders工具  termQuery 精确查询 matchAllQuery匹配所有
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "zoomy1");
//        MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();
        searchSourceBuilder.query(termQueryBuilder);
        //from size有默认参数
//        searchSourceBuilder.from();
//        searchSourceBuilder.size();
        searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
        System.out.println(JSON.toJSONString(searchResponse.getHits()));
        for (SearchHit hit : searchResponse.getHits().getHits()) {
            System.out.println(hit.getSourceAsMap());
        }
    }

}

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