springboot集成es詳解

更新時間：2020年11月03日 14:34:15 作者：qq_43381763

這篇文章主要介紹了springboot集成es,本文通過實(shí)例代碼給大家介紹的非常詳細(xì)，對大家的學(xué)習(xí)或工作具有一定的參考借鑒價值，需要的朋友可以參考下

1.導(dǎo)入 maven依賴

 <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-dataelasticsearch</artifactId>
<dependency>

注意保持版本一致我用的是7.6.2版本的

<properties>
      <java.version>1.8</java.version>
       <elasticsearch.version>7.6.2</elasticsearch.version>
     <!--自定義版本 保持版本一致-->
    </properties>

2.編寫config類相當(dāng)于 xlm導(dǎo)入文檔

@Configuration
public class ESConfig {

  @Bean
  public RestHighLevelClient restHighLevelClient (){
    RestHighLevelClient restHighLevelClient = new RestHighLevelClient(
        RestClient.builder(
            new HttpHost("localhost",9100,"http")
        )
    );
    return restHighLevelClient;
  }

注意這里的端口號一定不能搞錯

3測試書寫添加索引

@Test
  void contextLoads() throws IOException {

    //1.創(chuàng)建索引的請求
    CreateIndexRequest createIndexRequest = new CreateIndexRequest("mao");
    //2.執(zhí)行請求 獲得響應(yīng)
    CreateIndexResponse createIndexResponse = estHighLevelClient.indices().create(createIndexRequest, RequestOptions.DEFAULT);
    System.out.println(createIndexResponse);
  }

4.查詢索引是否存在

@Test //查詢索引是否存在
  void existIndex() throws IOException {
    GetIndexRequest getIndexRequest = new GetIndexRequest("test"); //獲得索引請求
    boolean exists = estHighLevelClient.indices().exists(getIndexRequest, RequestOptions.DEFAULT);
    System.out.println(exists);
  }

5.刪除索引

@Test//刪除
  void delIndex() throws IOException {
    DeleteIndexRequest deleteIndexRequest = new DeleteIndexRequest("test");
    AcknowledgedResponse delete = estHighLevelClient.indices().delete(deleteIndexRequest, RequestOptions.DEFAULT);
    System.out.println(delete);
    System.out.println(delete.isAcknowledged());
  }

6.添加文檔數(shù)據(jù) 第一要設(shè)置實(shí)體類導(dǎo)入阿里巴巴JSON 工具類

 @Data
@Accessors(chain = true) //實(shí)體類

public class User {
  private String name;
  private String age;
}

@Test //添加文檔
  void addDocument() throws IOException {
    //創(chuàng)建對象啊
    User user = new User().setAge("13").setName("mao");
    //創(chuàng)建請求
    IndexRequest request = new IndexRequest("mao");
    //設(shè)置規(guī)則 PUT /test/_doc/id
    request.id("1");
    request.timeout("1s");
    //將請求放入josn
    request.source(JSON.toJSONString(user),XContentType.JSON);
    //客戶端發(fā)送請求
    IndexResponse index = estHighLevelClient.index(request, RequestOptions.DEFAULT);
    //獲取響應(yīng)結(jié)果
    System.out.println(index.toString());
    System.out.println(index.status());

 <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.47</version>
    </dependency>

7.修改文檔

@Test //Update 文檔操作
  void GengXin() throws IOException {
    UpdateRequest updateRequest = new UpdateRequest("mao","1"); //請求更新文檔
    updateRequest.timeout("1s"); //設(shè)置超時時間
    User user= new User().setName("張三").setAge("26");
    updateRequest.doc(JSON.toJSONString(user),XContentType.JSON); //將對象封裝丟進(jìn)去 XContentType方法 將要傳輸?shù)臄?shù)據(jù)進(jìn)行告知
    UpdateResponse update = estHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);//發(fā)送請求
    System.out.println(update);
  }

8.批量增加

@Test //批量丟入數(shù)據(jù)
  void TestBulkIndexRequest() throws IOException {
    BulkRequest bulkRequest = new BulkRequest(); //大批量導(dǎo)入數(shù)據(jù) 本質(zhì)是for循環(huán)
    bulkRequest.timeout("10s");
    ArrayList<User> users = new ArrayList<>();
    for(int i=0;i<10;i++){
      users.add(new User().setName("張三"+i+"號").setAge(""+i));
    }

    //批處理請求
    for(int i =0;i<users.size();i++){
      bulkRequest.add(
          new IndexRequest("mao")
          .id(""+(i+1))
          .source(JSON.toJSONString(users.get(i)),XContentType.JSON)
      );

    }
    BulkResponse bulk = estHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
    System.out.println(bulk);
    System.out.println(bulk.hasFailures());//查詢是否失敗

  }

9.精確查詢

 @Test//查詢
  void testSearch() throws IOException {
    SearchRequest searchRequest = new SearchRequest(ESConstant.ESConstant);
    SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
    //精確查詢條件


    TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("age", "0");
    //查詢所有
//    MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();
     searchSourceBuilder.query(termQueryBuilder) ;//將規(guī)則加入
//     searchSourceBuilder.from(); //設(shè)置分頁
//     searchSourceBuilder.size();
     searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));//設(shè)置高并發(fā)下的延遲時間
     searchSourceBuilder.highlighter();
     searchRequest.source(searchSourceBuilder);//將剛剛做的請求體放入
    SearchResponse search = estHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);//請求信息
    System.out.println(JSON.toJSONString(search.getHits()));//返回查詢情況 getHits 封裝返回對象

    for( SearchHit SearchHit:search.getHits().getHits() ){
      System.out.println(SearchHit.getSourceAsMap());

    }
  }

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