Elasticsearch简单操作(Java代码)
1.首先安装Elasticsearch,配置相关文件,并启动服务
2.创建项目,导入相关Jar包
3.创建ElasticsearchUtils类,里面包括初始化操作和创建索引、更新索引、删除索引、查询索引
(1)初始化操作,需要传入集群名称和ip地址,集群名称本例子使用elasticsearch配置文件中配置的cluster name,IP地址使用localhost
- public class ElasticsearchUtils {
- private Client client;
- public ElasticsearchUtils(String clusterName, String ipAddress) {
- Settings settings = ImmutableSettings
- .settingsBuilder()
- //设置集群名称
- .put(”cluster.name”, clusterName)
- .put(”client.transport.ignore_cluster_name”, false)
- .put(”node.client”, true).put(“client.transport.sniff”, true)
- .build();
- client = new TransportClient(settings)
- .addTransportAddress(new InetSocketTransportAddress(ipAddress,
- 9300));//此处端口号为9300
- }
- }
public class ElasticsearchUtils {
private Client client; public ElasticsearchUtils(String clusterName, String ipAddress) { Settings settings = ImmutableSettings .settingsBuilder() //设置集群名称 .put("cluster.name", clusterName) .put("client.transport.ignore_cluster_name", false) .put("node.client", true).put("client.transport.sniff", true) .build(); client = new TransportClient(settings) .addTransportAddress(new InetSocketTransportAddress(ipAddress, 9300));//此处端口号为9300 } }
(2)创建索引
- /**
- * 创建索引
- * @param indexName 索引名称,相当于数据库名称
- * @param typeName 索引类型,相当于数据库中的表名
- * @param id id名称,相当于每个表中某一行记录的标识
- * @param jsonData json数据
- */
- public void createIndex(String indexName, String typeName, String id,
- String jsonData) {
- IndexRequestBuilder requestBuilder = client.prepareIndex(indexName,
- typeName, id).setRefresh(true);//设置索引名称,索引类型,id
- requestBuilder.setSource(jsonData).execute().actionGet();//创建索引
- }
/**
* 创建索引
* @param indexName 索引名称,相当于数据库名称
* @param typeName 索引类型,相当于数据库中的表名
* @param id id名称,相当于每个表中某一行记录的标识
* @param jsonData json数据
*/
public void createIndex(String indexName, String typeName, String id,
String jsonData) {
IndexRequestBuilder requestBuilder = client.prepareIndex(indexName,
typeName, id).setRefresh(true);//设置索引名称,索引类型,id
requestBuilder.setSource(jsonData).execute().actionGet();//创建索引
}
(3)查询索引
- /**
- * 执行搜索
- * @param indexname 索引名称
- * @param type 索引类型
- * @param queryBuilder 查询条件
- * @return
- */
- public SearchResponse searcher(String indexName, String typeName,
- QueryBuilder queryBuilder) {
- SearchResponse searchResponse = client.prepareSearch(indexName)
- .setTypes(typeName).setQuery(queryBuilder).execute()
- .actionGet();//执行查询
- return searchResponse;
- }
/**
* 执行搜索
* @param indexname 索引名称
* @param type 索引类型
* @param queryBuilder 查询条件
* @return
*/
public SearchResponse searcher(String indexName, String typeName,
QueryBuilder queryBuilder) {
SearchResponse searchResponse = client.prepareSearch(indexName)
.setTypes(typeName).setQuery(queryBuilder).execute()
.actionGet();//执行查询
return searchResponse;
}
(4)更新索引
- /**
- * 更新索引
- * @param indexName 索引名称
- * @param typeName 索引类型
- * @param id id名称
- * @param jsonData json数据
- */
- public void updateIndex(String indexName, String typeName, String id,
- String jsonData) {
- UpdateRequest updateRequest = new UpdateRequest();
- updateRequest.index(indexName);//设置索引名称
- updateRequest.id(id);//设置id
- updateRequest.type(typeName);//设置索引类型
- updateRequest.doc(jsonData);//更新数据
- client.update(updateRequest).actionGet();//执行更新
- }
/**
* 更新索引
* @param indexName 索引名称
* @param typeName 索引类型
* @param id id名称
* @param jsonData json数据
*/
public void updateIndex(String indexName, String typeName, String id,
String jsonData) {
UpdateRequest updateRequest = new UpdateRequest();
updateRequest.index(indexName);//设置索引名称
updateRequest.id(id);//设置id
updateRequest.type(typeName);//设置索引类型
updateRequest.doc(jsonData);//更新数据
client.update(updateRequest).actionGet();//执行更新
}
(5)删除索引
- /**
- * 删除索引
- * @param indexName
- * @param typeName
- * @param id
- */
- public void deleteIndex(String indexName, String typeName, String id) {
- client.prepareDelete(indexName, typeName, id).get();
- }
/**
* 删除索引
* @param indexName
* @param typeName
* @param id
*/
public void deleteIndex(String indexName, String typeName, String id) {
client.prepareDelete(indexName, typeName, id).get();
}
4.创建测试类
- package com.elasticsearch.test;
- import org.elasticsearch.action.search.SearchResponse;
- import org.elasticsearch.index.query.QueryBuilder;
- import org.elasticsearch.index.query.QueryBuilders;
- import org.elasticsearch.search.SearchHit;
- import org.elasticsearch.search.SearchHits;
- public class Test {
- public static void main(String[] args) {
- //创建对象,设置集群名称和IP地址
- ElasticsearchUtils es = new ElasticsearchUtils(“im_shan”,
- ”localhost”);
- String indexName = ”school”;//索引名称
- String typeName = ”student”;//类型名称
- String id = ”1”;
- String jsonData = ”{“ + “\”name\”:\”kimchy\”,”
- + ”\”birth\”:\”1995-01-30\”,” + “\”email\”:\”[email protected]\”“
- + ”}”;//json数据
- //1.创建索引(ID可自定义也可以自动创建,此处使用自定义ID)
- es.createIndex(indexName, typeName, id, jsonData);
- //2.执行查询
- //(1)创建查询条件
- QueryBuilder queryBuilder = QueryBuilders.termQuery(”name”, “kimchy”);//搜索name为kimchy的数据
- //(2)执行查询
- SearchResponse searchResponse = es.searcher(indexName, typeName,
- queryBuilder);
- //(3)解析结果
- SearchHits hits = searchResponse.getHits();
- SearchHit[] searchHits = hits.getHits();
- for (SearchHit searchHit : searchHits) {
- String name = (String) searchHit.getSource().get(”name”);
- String birth = (String) searchHit.getSource().get(”birth”);
- String email = (String) searchHit.getSource().get(”email”);
- System.out.println(name);
- System.out.println(birth);
- System.out.println(email);
- }
- //3.更新数据
- jsonData = ”{“ + “\”name\”:\”jack\”,” + “\”birth\”:\”1996-01-30\”,”
- + ”\”email\”:\”[email protected]\”“ + “}”;//json数据
- es.updateIndex(indexName, typeName, id, jsonData);
- //4.删除数据
- es.deleteIndex(indexName, typeName, id);
- }
- }
package com.elasticsearch.test;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
public class Test {
public static void main(String[] args) {
//创建对象,设置集群名称和IP地址
ElasticsearchUtils es = new ElasticsearchUtils(“im_shan”,
“localhost”);
String indexName = “school”;//索引名称
String typeName = “student”;//类型名称
String id = “1”;
String jsonData = “{” + ““name”:“kimchy”,”
+ ““birth”:“1995-01-30”,” + "“email”:"[email protected]""
+ “}”;//json数据
//1.创建索引(ID可自定义也可以自动创建,此处使用自定义ID)
es.createIndex(indexName, typeName, id, jsonData);
//2.执行查询
//(1)创建查询条件
QueryBuilder queryBuilder = QueryBuilders.termQuery("name", "kimchy");//搜索name为kimchy的数据
//(2)执行查询
SearchResponse searchResponse = es.searcher(indexName, typeName,
queryBuilder);
//(3)解析结果
SearchHits hits = searchResponse.getHits();
SearchHit[] searchHits = hits.getHits();
for (SearchHit searchHit : searchHits) {
String name = (String) searchHit.getSource().get("name");
String birth = (String) searchHit.getSource().get("birth");
String email = (String) searchHit.getSource().get("email");
System.out.println(name);
System.out.println(birth);
System.out.println(email);
}
//3.更新数据
jsonData = "{" + "\"name\":\"jack\"," + "\"birth\":\"1996-01-30\","
+ "\"email\":\"[email protected]\"" + "}";//json数据
es.updateIndex(indexName, typeName, id, jsonData);
//4.删除数据
es.deleteIndex(indexName, typeName, id);
}
}
1.创建索引之后,可以在浏览器输入http://localhost:9200/_plugin/head/
进行查看,可以发现索引已创建,index名称为school,type为student,id为1
2.查询索引,控制台会输出name为kimchy的birth、email的值
3.更新索引,此时再次进入http://localhost:9200/_plugin/head/ 进行查看,发现内容已经改变
4.删除索引,代码执行后输入http://localhost:9200/_plugin/head/
查看,内容已清空
参考:http://www.tuicool.com/articles/R7RVJb
官方Java API:https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/transport-client.html
源码下载:http://download.csdn.net/detail/lom9357bye/9656269
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