//查询删除：将查询到的数据进行删除

    @Test

    public void test8() throws UnknownHostException {

        //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名称

                Settings settings = Settings.builder().put("cluster.name", "my-application").build();

                //2.创建访问ES服务器的客户端

                TransportClient client = new PreBuiltTransportClient(settings)

                        //获取es主机中节点的ip地址及端口号(以下是单个节点案例)

                                        .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));

                BulkByScrollResponse response = DeleteByQueryAction.INSTANCE

                        .newRequestBuilder(client)

                        .filter(QueryBuilders.matchQuery("title", "工厂"))

                        .source("index1")

                        .get();

                //删除并返回删除的个数

                long counts =response.getDeleted();

                System.out.println(counts);

    }

//match_all查询所有

    @Test

    public void test9() throws UnknownHostException {

        //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名称

        Settings settings = Settings.builder().put("cluster.name", "my-application").build();

        //2.创建访问ES服务器的客户端

        TransportClient client = new PreBuiltTransportClient(settings)

                //获取es主机中节点的ip地址及端口号(以下是单个节点案例)

                                .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));

        QueryBuilder qBuilder = QueryBuilders.matchAllQuery();

        SearchResponse sResponse = client.prepareSearch("lib3")

                .setQuery(qBuilder)

                .get();

        SearchHits hits = sResponse.getHits();

        for(SearchHit hit:hits) {

            System.out.println(hit.getSourceAsString());

            //将获取的值转换成map的形式

            Map<String, Object> map = hit.getSourceAsMap();

            for(String key:map.keySet()) {

                System.out.println(key +" key对应的值为：" +map.get(key));

            }

        }