ElasticSearch（二）

ElasticSearch（二）

下面说一下es的API 此前针对5.6.3版本

MAVEN依赖：

 <dependency>      <groupId>org.elasticsearch.client</groupId>      <artifactId>transport</artifactId>      <version>5.6.3</version>    </dependency>

1.连接集群：

   //设置集群的属性        Settings settings = Settings.builder()                            .put("cluster.name","hr_es").build();        //创建集群客户端        TransportClient client = new PreBuiltTransportClient(settings);        //连接集群的各个节点        client.addTransportAddress(new InetSocketTransportAddress(new InetSocketAddress("192.168.80.11",9300)));        client.addTransportAddress(new InetSocketTransportAddress(new InetSocketAddress("192.168.80.12",9300)));        client.addTransportAddress(new InetSocketTransportAddress(new InetSocketAddress("192.168.80.13",9300)));        //测试是否连接成功        List<DiscoveryNode> discoveryNodes = client.listedNodes();        for (DiscoveryNode discoveryNode : discoveryNodes) {            System.out.println(discoveryNode.getAddress());        }    }

2.创建索引库

  //设置索引库属性        Settings settings = Settings.builder()                .put("number_of_shards",5)//指定分片数                .put("number_of_replicas",1)//指定副本数                .build();        //创建索引库        CreateIndexResponse response = client.admin().indices().prepareCreate("myesindex")                .setSettings(settings).get();        //测验是否成功        System.out.println(response.isAcknowledged());

3.修改测试库副本数

  //设置属性        Settings settings = Settings.builder()                .put("number_of_replicas",2)//指定副本数                .build();        //执行更改        UpdateSettingsResponse response = client.admin().indices().prepareUpdateSettings("myesindex")                .setSettings(settings).get();        //测试是否成功        System.out.println(response.isAcknowledged());

4.获取集群和索引库信息

 //获得集群客户端        ClusterAdminClient cluster = client.admin().cluster();        ClusterHealthResponse healths =cluster.prepareHealth().get();        //获取集群名字        String clusterName = healths.getClusterName();        //获取节点数量        int numberOfNodes = healths.getNumberOfNodes();        // 获取数据节点数量        int numberOfDataNodes = healths.getNumberOfDataNodes();        //获取所有的索引库        Collection<ClusterIndexHealth> values = healths.getIndices().values();        for (ClusterIndexHealth value : values) {            String index = value.getIndex();            //分片数            int numberOfReplicas = value.getNumberOfReplicas();            //副本数            int numberOfShards = value.getNumberOfShards();            //索引库状态            ClusterHealthStatus status = value.getStatus();        }

增删改查

1.index

    /**     * 添加索引     */    private String index = "myesindex";//全局变量  索引库名称    private String type = "emp";//全局变量  类型名称    @Test    public void index() throws Exception{        //以下三种 取一即可 作为serSource()参数        //1.以XcontentBuilder形式        XContentBuilder builder = XContentFactory.jsonBuilder().startObject()                .field("name", "何睿")                .field("age", 24)                .field("sex", "男")                .endObject();        //2.Map形式        Map map = new HashMap<String,Object>();        map.put("name","何睿");map.put("age",24);map.put("sex","男");        //3.Json形式 setSource需要参数XContentType.JSON        // 4.javabean 形式 -->转换成json        IndexResponse response = client.prepareIndex(index, type, "1")                .setSource(builder).get();        //测试是否成功        System.out.println(response.getId());    }

2.get

GetResponse response = client.prepareGet(index, type, "1").get();        System.out.println(response.getSourceAsString());

mget

    MultiGetResponse responses = client.prepareMultiGet().add(index, type, "1", "2", "3").get();        for (MultiGetItemResponse respons : responses) {            GetResponse response = respons.getResponse();            System.out.println(respons);        }

delete

 DeleteResponse response = client.prepareDelete(index, type, "1").get();        System.out.println(response.getId());

deletebyquery

//termQuery 不会分词           matchQuery会分词   BulkByScrollResponse response = DeleteByQueryAction.INSTANCE.newRequestBuilder(client)                .source(index).filter(QueryBuilders.matchQuery("sex", "女人"))                .get();        System.out.println(response.getDeleted());

update1

  XContentBuilder builder = XContentFactory.jsonBuilder().startObject()                .field("name", "何睿").field("age", 24)                .field("sex", "男人").endObject();        UpdateResponse response = client.prepareUpdate(index, type, "2")                .setDoc(builder).get();        System.out.println(response.getId());

update2

    XContentBuilder builder = XContentFactory.jsonBuilder().startObject()                .field("name", "何睿").field("age", 24)                .field("sex", "男人啊").endObject();        UpdateRequest updateRequest = new UpdateRequest(index,type,"2");        updateRequest.doc(builder);        UpdateResponse response = client.update(updateRequest).get();        System.out.println(response.getId());

upsert

  XContentBuilder xContentBuilder1 = XContentFactory.jsonBuilder()                .startObject().field("name","帅帅啊").endObject();        XContentBuilder xContentBuilder2 = XContentFactory.jsonBuilder()                .startObject().field("name","帅不帅").endObject();        UpdateResponse response = client.prepareUpdate(index, type, "1").setDoc(xContentBuilder1)                .setUpsert(xContentBuilder2).get();        System.out.println(response.getId());