Elasticsearch7.8.0版本入门——JavaAPI操作（批量操作文档）

Posted 2023-02-01 小志的博客

目录

• • 一、pom文件依赖
  • 二、批量操作文档 代码示例
  • • 2.1、批量创建文档 代码示例
    • 2.2、批量删除文档 代码示例

一、pom文件依赖

• 引入相关依赖

  <!-- elasticsearch 依赖 -->
  <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>
  <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
  </dependency>
  

二、批量操作文档 代码示例

2.1、批量创建文档 代码示例

• 批量创建文档代码示例

  package com.xz.esdemo.day3;
  
  import org.apache.http.HttpHost;
  import org.elasticsearch.action.bulk.BulkRequest;
  import org.elasticsearch.action.bulk.BulkResponse;
  import org.elasticsearch.action.index.IndexRequest;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestClient;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.common.xcontent.XContentType;
  
  /**
   * @description: 批量创建文档
   * @author: xz
   */
  public class EsDocBatchCreate 
      public static void main(String[] args) throws Exception
          // 创建 es 客户端对象
          RestHighLevelClient client = new RestHighLevelClient(
                  RestClient.builder(new HttpHost("localhost", 9200, "http"))
          );
  
          //创建批量新增请求对象
          BulkRequest bulkRequest = new BulkRequest();
          bulkRequest.add(new IndexRequest().index("user").id("01").source(XContentType.JSON, "name",
              "zhangsan","age",20,"sex","男"));
      	bulkRequest.add(new IndexRequest().index("user").id("02").source(XContentType.JSON, "name",
              "lisi","age",25,"sex","女"));
      	bulkRequest.add(new IndexRequest().index("user").id("03").source(XContentType.JSON, "name",
              "wangwu","age",30,"sex","女"));
      	bulkRequest.add(new IndexRequest().index("user").id("04").source(XContentType.JSON, "name",
              "wangwu1","age",18,"sex","男"));
      	bulkRequest.add(new IndexRequest().index("user").id("05").source(XContentType.JSON, "name",
              "wangwu2","age",23,"sex","女"));
  
  
          // 客户端发送请求，获取响应对象
          BulkResponse response = client.bulk(bulkRequest, RequestOptions.DEFAULT);
  
          //打印结果信息
          System.out.println("消耗时间took:" + response.getTook());
          System.out.println("结果信息items:" + response.getItems());
  
          // 关闭 es 客户端连接
          client.close();
      
  
  

• 执行代码，查看控制台信息，如下图表示批量创建文档成功。
  

• 通过postman工具查看批量创建的文档信息，如下图所示：

  

2.2、批量删除文档 代码示例

• 批量删除文档代码示例

  package com.xz.esdemo.day3;
  
  import org.apache.http.HttpHost;
  import org.elasticsearch.action.bulk.BulkRequest;
  import org.elasticsearch.action.bulk.BulkResponse;
  import org.elasticsearch.action.delete.DeleteRequest;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestClient;
  import org.elasticsearch.client.RestHighLevelClient;
  
  /**
   * @description: 批量删除文档
   * @author: xz
   */
  public class EsDocBatchDelete 
      public static void main(String[] args) throws Exception
          // 创建 es 客户端对象
          RestHighLevelClient client = new RestHighLevelClient(
                  RestClient.builder(new HttpHost("localhost", 9200, "http"))
          );
  
          //创建批量删除请求对象
          BulkRequest bulkRequest = new BulkRequest();
          bulkRequest.add(new DeleteRequest().index("user").id("01"));
          bulkRequest.add(new DeleteRequest().index("user").id("02"));
          bulkRequest.add(new DeleteRequest().index("user").id("03"));
      	bulkRequest.add(new DeleteRequest().index("user").id("04"));
      	bulkRequest.add(new DeleteRequest().index("user").id("05"));
  
  
          // 客户端发送请求，获取响应对象
          BulkResponse response = client.bulk(bulkRequest, RequestOptions.DEFAULT);
  
          //打印结果信息
          System.out.println("消耗时间took:" + response.getTook());
          System.out.println("结果信息items:" + response.getItems());
  
          // 关闭 es 客户端连接
          client.close();
      
  
  
  

• 执行代码，查看控制台信息，如下图表示批量删除文档成功。
  

• 通过postman工具查看批量删除的文档信息，如下图所示：