es7.6.2 RestHighLevelClient创建使用，基础增删改查

 

依赖的包

			org.elasticsearch.client
			elasticsearch-rest-high-level-client
			7.6.2
		
		
			org.elasticsearch.client
			elasticsearch-rest-client
			7.6.2
		
		
			org.elasticsearch
			elasticsearch
			7.6.2
		

创建client 和 新增索引信息示例：

  public static void  main(String[] args){
        // 指定ip 端口
        HttpHost httpHost = new HttpHost("localhost",9200,"http");
        // 创建client
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(RestClient.builder(httpHost));
        // 索引数据
        Map json = new HashMap<>();
        json.put("user","zhanghaha");
        json.put("message","hello啊");
        // 请求对象 指定索引名称，和source 数据
        IndexRequest indexRequest = new IndexRequest("testsuoyin1").source(json);
        try {
            // 执行得到 response
            IndexResponse indexResponse = restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);
            System.out.println("出参："+indexResponse.toString());
            // 关闭
            restHighLevelClient.close();
        }catch (Exception e){

        }

    }

执行上面代码后会 生成‘testsuoyin1 的索引文件，和数据。如图：

// 根据文档 id 查询

public static void  main(String[] args){
        // 指定ip 端口
        HttpHost httpHost = new HttpHost("localhost",9200,"http");
        // 创建client
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(RestClient.builder(httpHost));
    // 根据文档id 查询 
        GetRequest getRequest = new GetRequest("testsuoyin1","rpsjR3QBb3uB6hDzEBFC");
        try {
            // 查询结果
            GetResponse documentFields = restHighLevelClient.get(getRequest, RequestOptions.DEFAULT);
            String id = documentFields.getId();// id
            Map fields = documentFields.getFields();
            String index = documentFields.getIndex();// index
            Map source = documentFields.getSource();// 索引的字段信息
            long primaryTerm = documentFields.getPrimaryTerm();
            long version = documentFields.getVersion();
            System.out.println("id:"+id+"index:"+index+"version:"+version+"count:"+fields.size());
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                restHighLevelClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

根据文档id 删除 获取删除结果 和删除条数

 public static void  main(String[] args){
        // 指定ip 端口
        HttpHost httpHost = new HttpHost("localhost",9200,"http");
        // 创建client
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(RestClient.builder(httpHost));
    // 根据文档id 删除
        DeleteRequest deleteRequest = new DeleteRequest("testsuoyin1","rpsjR3QBb3uB6hDzEBFC");
        try {
            // 执行删除
            DeleteResponse delete = restHighLevelClient.delete(deleteRequest, RequestOptions.DEFAULT);
            DocWriteResponse.Result result = delete.getResult();
            long seqNo = delete.getSeqNo();
            int successful = delete.getShardInfo().getSuccessful();// 获取删除条数
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                restHighLevelClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

// 根据文档id  更新文档  需要注意的是：测试类运行后 好像只能更新 已存在的字段，不存在的字段不会增加

 public static void  main(String[] args){
        // 指定ip 端口
        HttpHost httpHost = new HttpHost("localhost",9200,"http");
        // 创建client
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(RestClient.builder(httpHost));
    // 根据文档id 更新
        HashMap map = new HashMap<>();
        map.put("123","awaerqwer");
        map.put("234","asfd");
        map.put("message","helloaaaaa");
        UpdateRequest updateRequest = new UpdateRequest("testsuoyin1","r5sjR3QBb3uB6hDz2RG7").doc(map);
        try {

            // 执行更新
            UpdateResponse update = restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);
            GetResult getResult = update.getGetResult();
            int total = update.getShardInfo().getTotal();
            System.out.println(total);
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            try {
                restHighLevelClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

使用head 插入一条数据：

post:

{
  "id": 123,
  "title": "第二个目标是通过该接口获取特定歌曲的hash和album_id的值用于下面歌曲的播放，文字图片以及歌词（下一篇讲）的显示，",
  "content": "第二个目标是通过该接口获取特定歌曲的hash和album_id的值用于下面歌曲的播放，文字图片以及歌词（下一篇讲）的显示"
}

 

使用head  match 查询单个字段：

post:

{
  "query": {
    "match": {
      "title": "集群健康状态"
    }
  }
}

 

指定字段排序：

{
  "query": {
    "match": {
      "title": "是"
    }
  },
  "sort": {
    "_id": {
      "order": "desc"
    }
  }
}

 

 

match_phrase 查询：

{
  "query": {
    "match_phrase": {
      "title": {
        "query": "是 and 的",
        "slop": 3
      }
    }
  },
  "sort": {
    "_id": {
      "order": "desc"
    }
  }
}

 

multi_match 查询。匹配多个字段：

title  content 字段 其中一个字段内容包含 ‘第二个’ 或者 and 都可以

{
  "query": {
    "multi_match": {
      "query": "第二个 and",
      "fields": [
        "title",
        "content"
      ]
    }
  }
}