elasticsearch JAVA API小例子

package taotao.maozi.maven_es;

import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.SearchType;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
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.elasticsearch.index.get.GetField;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Date;
import java.util.Map;
import java.util.concurrent.ExecutionException;

/**
* Created by root on 2016/3/26 0026.
*/
public class App {
Client client = null;
/**
* 预加载
* @throws UnknownHostException
*/
@Before
public void init() throws Exception {

Settings settings = Settings.settingsBuilder().put("cluster.name", "my-application").build();
client = TransportClient.builder().settings(settings).build()
.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("www.master.com"), 9300))
.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("www.slave1.com"), 9300))
.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("www.slave2.com"), 9300));

}

/**
* 建立索引
* @throws Exception
*/
@Test
public void crete() throws Exception {

XContentBuilder builder = XContentFactory.jsonBuilder()
.startObject()
.field("user", "123456")
.field("postDate", new Date())
.field("message", "trying out Elasticsearch!!!!!!!!!!!!!!")
.endObject();
String json = builder.string();
//建立索引
IndexResponse response = client.prepareIndex("bjsxt", "emp", "1").setSource(json).execute().actionGet();

System.out.println("建立索引：===" + response);
}



/**
* 搜索1
*/
@Test
public void such() {

//搜索api
SearchResponse response = client.prepareSearch("bjsxt")
.setTypes("emp")
.setSearchType(SearchType.DFS_QUERY_THEN_FETCH)
.setQuery(QueryBuilders.termQuery("user", "123456")) // Query
// .setPostFilter(QueryBuilders.rangeQuery("age").from(12).to(18)) // Filter
.setFrom(0).setSize(1).setExplain(true)
.execute()
.actionGet();

SearchHits hits = response.getHits();
System.out.println(hits.getHits().length);
SearchHit[] hits1 = hits.getHits();
for(SearchHit hit :hits1){
Map<String, Object> source = hit.getSource();
for(Map.Entry<String,Object> filed :source.entrySet()){
String key = filed.getKey();
System.out.println("key===="+key+" value====="+filed.getValue().toString());
}
}


}

/**
* 搜索002
* <p>Title: such02</p>
* <p>Description: </p>
*/
@Test
public void such02() {
// 查询索引两种方式
GetResponse response = client.prepareGet("bjsxt", "emp", "1").execute().actionGet();
//GetResponse response = client.prepareGet("bjsxt", "emp", "1").get();
Map<String, Object> source = response.getSource();
for (Map.Entry<String, Object> filed : source.entrySet()) {
String key = filed.getKey();
System.out.println("key====" + key + " name=====" + filed.getValue().toString());
}

}

/**
* 修改
* @throws IOException
* @throws ExecutionException
* @throws InterruptedException
*/
@Test
public void update() throws Exception {

XContentBuilder builder = XContentFactory.jsonBuilder()
.startObject()
.field("user", "123456")
.field("postDate", new Date())
.field("message", "trying out update8833388668")
.endObject();
String json = builder.string();

UpdateRequest updateRequest = new UpdateRequest();
updateRequest.index("bjsxt");
updateRequest.type("emp");
updateRequest.id("1");
updateRequest.doc(builder);
UpdateResponse updateResponse = client.update(updateRequest).get();
// System.out.println("===="+updateResponse.+ "=====");

/* Map<String, Object> source = updateResponse.getGetResult().getSource();
for (Map.Entry<String, Object> filed : source.entrySet()) {
String key = filed.getKey();
System.out.println("key====" + key + " name=====" + filed.getValue().toString());
}*/
}


/**
* 删除
*/
@Test
public void del() {
// 删除索引
DeleteResponse response = client.prepareDelete("bjsxt", "emp", "1").get();
System.out.println(response);
}
}

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maven 依赖

maven 会自动解决依赖关系

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<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>2.2.0</version>
</dependency>

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