springboot集成es详解

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

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

@Configuration
public class ESConfig {

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

@Test
  void contextLoads() throws IOException {

    //1.创建索引的请求
    CreateIndexRequest createIndexRequest = new CreateIndexRequest("mao");
    //2.执行请求 获得响应
    CreateIndexResponse createIndexResponse = estHighLevelClient.indices().create(createIndexRequest, RequestOptions.DEFAULT);
    System.out.println(createIndexResponse);
  }

@Test //查询索引是否存在
  void existIndex() throws IOException {
    GetIndexRequest getIndexRequest = new GetIndexRequest("test"); //获得索引请求
    boolean exists = estHighLevelClient.indices().exists(getIndexRequest, RequestOptions.DEFAULT);
    System.out.println(exists);
  }

@Test//删除
  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());
  }

 @Data
@Accessors(chain = true) //实体类

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

@Test //添加文档
  void addDocument() throws IOException {
    //创建对象啊
    User user = new User().setAge("13").setName("mao");
    //创建请求
    IndexRequest request = new IndexRequest("mao");
    //设置规则 PUT /test/_doc/id
    request.id("1");
    request.timeout("1s");
    //将请求放入josn
    request.source(JSON.toJSONString(user),XContentType.JSON);
    //客户端发送请求
   <span>本文来源gaodai#ma#com搞*!代#%^码$网*</span> IndexResponse index = estHighLevelClient.index(request, RequestOptions.DEFAULT);
    //获取响应结果
    System.out.println(index.toString());
    System.out.println(index.status());

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

@Test //Update 文档操作
  void GengXin() throws IOException {
    UpdateRequest updateRequest = new UpdateRequest("mao","1"); //请求更新文档
    updateRequest.timeout("1s"); //设置超时时间
    User user= new User().setName("张三").setAge("26");
    updateRequest.doc(JSON.toJSONString(user),XContentType.JSON); //将对象封装丢进去 XContentType方法 将要传输的数据进行告知
    UpdateResponse update = estHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);//发送请求
    System.out.println(update);
  }