elasticsearch笔记(4) java操作es的文档

------------恢复内容开始------------

一. 创建document, 分为自动生成id和手动生成id

# 创建文档 手动生成id
POST /books/noval/1011
{
  "name": "红楼梦",
  "author": "曹雪芹",
  "count": 5932222,
  "onsale": "1646",
  "descr": "红楼梦是一本女生命运的小说"
}

# 创建文档 自动生成id
POST /books/noval
{
  "name": "水浒传",
  "author": "施耐庵",
  "count": 59322,
  "onsale": "1546",
  "descr": "一本关于农民起义的小说"
}

//        准备json数据
        Person person = new Person();
        person.setName("jim");
        person.setAge(10);
        person.setId(1001);

        ObjectMapper mapper = new ObjectMapper();//jackson-bind插件中的对象
        String string = mapper.writeValueAsString(person);


//        准备IndexRequest对象(设置好index  type  以及id,不加id会自动创建) POST /books/noval/1011
        IndexRequest indexRequest = new IndexRequest(index,type, person.getId().toString());
        indexRequest.source(string, XContentType.JSON);

        //  获取连接restHighLevelClient
        HttpHost httpHost = new HttpHost(HOST,PORT);
        RestClientBuilder restClientBuilder = RestClient.builder(httpHost);
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(restClientBuilder);
//        通过client对象执行添加
        IndexResponse indexResponse = restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);
        DocWriteResponse.Result result = indexResponse.getResult();
        System.out.println(result);
    }

 二. 修改document

//        1. 创建map
        Map<String, Object> map = new HashMap();
        map.put("name","tom");
        map.put("age", 100);
//      2.建立updateRequest对象封装数据;
        String index = "person";
        String type = "man";
        String id = "1001";//需要通过id操作
        UpdateRequest updateRequest = new UpdateRequest(index, type, id);
        updateRequest.doc(map);
//        3. clien操作
        HttpHost httpHost = new HttpHost(HOST,PORT);
        RestClientBuilder restClientBuilder = RestClient.builder(httpHost);
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(restClientBuilder);
        UpdateResponse update = restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);
        System.out.println(update);

三, 删除document

 //1封装request对象
        String index = "person";
        String type = "man";
        String id = "1001";//需要通过id操作
        DeleteRequest deleteRequest = new DeleteRequest(index, type, id);
//        2.用client删除
        HttpHost httpHost = new HttpHost(HOST,PORT);
        RestClientBuilder restClientBuilder = RestClient.builder(httpHost);
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(restClientBuilder);
        DeleteResponse delete = restHighLevelClient.delete(deleteRequest, RequestOptions.DEFAULT);
        System.out.println(delete);

四. 批量操作(通过client.bulk(bulk)来操作)

4.1 批量添加

//        1. 准备多个person
        Person person1 = new Person(1003,"jack1",10);
        Person person2 = new Person(1004,"jack2",10);
        Person person3 = new Person(1005,"jack3",10);

        ObjectMapper mapper = new ObjectMapper();
        String p1 = mapper.writeValueAsString(person1);
        String p2 = mapper.writeValueAsString(person2);
        String p3 = mapper.writeValueAsString(person3);

//           2. 创建BulkRequest对象
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.add(new IndexRequest("person","man",person1.getId().toString()).source(p1, XContentType.JSON))
                .add(new IndexRequest("person","man",person2.getId().toString()).source(p2, XContentType.JSON))
                .add(new IndexRequest("person","man",person3.getId().toString()).source(p3, XContentType.JSON));

//            3通过client操作
        HttpHost httpHost = new HttpHost(HOST,PORT);
        RestClientBuilder restClientBuilder = RestClient.builder(httpHost);
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(restClientBuilder);

        BulkResponse bulk = restHighLevelClient.bulk(bulkRequest,RequestOptions.DEFAULT);
        System.out.println(bulk);

4.2 批量删除

//     1.准备deleteRequest
        String index = "person";
        String type = "man";

        DeleteRequest deleteRequest1 = new DeleteRequest(index, type, "1003");
        DeleteRequest deleteRequest2 = new DeleteRequest(index, type, "1004");

//        2.创建bulk
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.add(deleteRequest1).add(deleteRequest2);

//            3通过client操作
        HttpHost httpHost = new HttpHost(HOST, PORT);
        RestClientBuilder restClientBuilder = RestClient.builder(httpHost);
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(restClientBuilder);

        BulkResponse bulk = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
        System.out.println(bulk);