opensearch java实例_Elasticsearch Client(JAVA API) JAVA实例

需要依赖，版本号视具体服务端版本

org.elasticsearch

elasticsearch

2.2.1

以下为java操作类

import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;

import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;

import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest;

import org.elasticsearch.action.get.GetResponse;

import org.elasticsearch.action.index.IndexResponse;

import org.elasticsearch.client.Client;

import org.elasticsearch.client.ClusterAdminClient;

import org.elasticsearch.client.Requests;

import org.elasticsearch.client.transport.TransportClient;

import org.elasticsearch.cluster.health.ClusterHealthStatus;

import org.elasticsearch.common.settings.Settings;

import org.elasticsearch.common.transport.InetSocketTransportAddress;

import org.elasticsearch.common.xcontent.XContentBuilder;

import org.elasticsearch.common.xcontent.XContentFactory;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import java.io.IOException;

import java.net.InetAddress;

import java.net.UnknownHostException;

import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;

/**

* Created by yangsj on 2016/6/3.

* ESclient 工具类

*/

public class EsClient {

static Logger logger = LoggerFactory.getLogger(EsClient.class);

static final String host = "192.168.0.128"; //节点IP

public static Client client;

static {

//设置集群名称和自动感知节点 集群名称为"my-application"

Settings settings = Settings.settingsBuilder()

.put("cluster.name", "my-application").put("client.transport.sniff", true).build();

try {

//创建节点客户端，9300位节点的端口，不是集群端口

client = TransportClient.builder().settings(settings).build()

.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(host), 9300));

} catch (UnknownHostException e) {

e.printStackTrace();

logger.info("unknownHost={}",host);

}

}

/**

* 通过ID查询数据，

* test为索引库，blog为类型，id为标识

*/

public static GetResponse get(String id){

return client.prepareGet("test", "blog",id ).get();

}

/**

* 创建索引，indexName 索引名称

* */

public static CreateIndexResponse createIndex(String indexName) throws IOException {

return client.admin().indices().prepareCreate(indexName).execute().actionGet();

}

//集群状态

public static void clusterStatus(){

//注意集群的client获取方式略有不同，

ClusterAdminClient clusterAdminClient = client.admin().cluster();

ClusterHealthResponse healths = clusterAdminClient.prepareHealth().get();

String clusterName = healths.getClusterName();

int numberOfDataNodes = healths.getNumberOfDataNodes();

int numberOfNodes = healths.getNumberOfNodes();

ClusterHealthStatus status = healths.getStatus();

System.out.println(clusterName+"###"+numberOfDataNodes+"###"+status.name());

}

public static void addType() throws IOException {

// 定义索引字段属性,其实这里就是组合json,可以参考curl 方式创建索引的json格式 此处blog 和执行时blog必须一致

XContentBuilder builder=XContentFactory.jsonBuilder()

.startObject()

.startObject("blog")

.startObject("properties")

.startObject("id").field("type", "integer").field("store", "yes").endObject()

.startObject("title").field("type", "string").field("store", "yes").endObject()

.startObject("content").field("type", "string").field("store", "yes").endObject()

.endObject()

.endObject()

.endObject();

PutMappingRequest mappingRequest = Requests.putMappingRequest("test").type("blog").source(builder);

client.admin().indices().putMapping(mappingRequest).actionGet();

}

/**

* 创建数据

* */

public static void createData() throws IOException {

// 创建数据json 注意此ID是一个字段不是上面查询的id

XContentBuilder builder = jsonBuilder()

.startObject()

.field("id", "2")

.field("title", "我是标题")

.field("content", "我是内容")

.endObject();

IndexResponse indexResponse = client.prepareIndex("test","blog").setSource(builder).execute().actionGet();

System.out.println(indexResponse.isCreated());

}

}

java调用

import org.elasticsearch.action.get.GetResponse;

import java.io.IOException;

/**

* Created by yangsj on 2016/6/3.

*/

public class ElasticTest {

public static void main(String[] args){

try {

EsClient.createIndex("test"); //创建索引 相当于关系型数据库的 数据库

EsClient.addType(); // 创建类型，相当于关系型数据库的 表

EsClient.createData(); //插入数据，相当于关系数据库的 记录

GetResponse getResponse = EsClient.get("AVUde1S5xIEMNjXAMyx4"); //获取数据

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

} catch (IOException e) {

e.printStackTrace();

}

}

}