java連結es，springboot內建es

springboot項目，某日同僚說，這個接口的資料不插mysql了，存到es裡面了，改一下吧，什麼是es？怎麼改？什麼是es我就不寫了，直接來代碼吧

1、檢視es版本

怎麼檢視你的es版本，通路http://ip:port/  換成你自己的，如果有賬密的會讓你輸入賬密，裡面的number就是版本号

 2.根據版本導入依賴

<dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>6.5.2</version>
        </dependency>

        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <version>6.5.2</version>
        </dependency>
           

3.寫單測

import com.alibaba.fastjson.JSON;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.nio.client.HttpAsyncClientBuilder;
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.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.junit.Test;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

/**
 * @Author: lxx
 * @Date: 2022/7/13 上午10:00
 */
public class TestE {
//查詢
    @Test
    public void highClient() throws IOException {
        final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(AuthScope.ANY,
                new UsernamePasswordCredentials("USER_NAME", "PASSWORD"));  //es賬号密碼（預設使用者名為elastic）
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost("IP", 9200, "http"))
                        .setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
                            public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) {
                                httpClientBuilder.disableAuthCaching();
                                return httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
                            }
                        }));
        SearchRequest request = new SearchRequest("INDEX_NAME");
        request.source().query(QueryBuilders.matchQuery("user_id","000UC020000130481"));
//        request.source().query(QueryBuilders.matchAllQuery());
        //發起請求，得到響應結果
        SearchResponse response = client.search(request, RequestOptions.DEFAULT);
        //輸出響應結果
        System.out.println(JSON.toJSONString(response));
    }
//插入

    @Test
    public void testInsert() {
        final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(AuthScope.ANY,
                new UsernamePasswordCredentials("USER_NAME", "PASSWORD"));  //es賬号密碼（預設使用者名為elastic）
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost("IP", 9200, "http"))
                        .setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
                            public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) {
                                httpClientBuilder.disableAuthCaching();
                                return httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
                            }
                        }));
        IndexRequest request = new IndexRequest("INDEX","TYPE","IP");
        Map<String, Object> jsonMap = new HashMap<>();
        jsonMap.put("age", "10");
        jsonMap.put("class_name", "2");
        jsonMap.put("teacher", "Elly");

        request.source(jsonMap);
        IndexResponse response = null;
        try {
            response = client.index(request, RequestOptions.DEFAULT);
            if(response.getResult().name().equalsIgnoreCase("created")){

                System.out.println("OK");
            }else {
                System.out.println("ERROR");
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

           

注意把裡面的相關資訊改成你自己的啊，ps我連結es的版本是6.5.2如果你的版本，由于版本差太多代碼可能也會無效的。