package com.itstar.elasticsearch_test1;
/**
* ES API操作
* @author ASUS
*
*/
import java.net.InetAddress;
import java.util.HashMap;
import java.util.Map;
import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.get.MultiGetItemResponse;
import org.elasticsearch.action.get.MultiGetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.Requests;
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.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
import org.junit.Before;
import org.junit.Test;
public class ESTest_1 {
// 对ES的操作都是通过client
private TransportClient client;
// 注意：加注解才能运行
@SuppressWarnings("unchecked")
@Before
// @Before 以后在操作ES的时候首先获取连接-初始化Client
// 获取连接-初始化Client
public void getClient() throws Exception {
// 1.设置连接集群的名称
Settings settings = Settings.builder().put("cluster.name", "my-application").build();
// 2.连接集群
client = new PreBuiltTransportClient(settings);
// IP，client-客户机操作ES的端口号
client.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("192.168.212.111"), 9300));
}
// 一、创建索引和删除索引
@Test
public void createIndex_blog() {
client.admin().indices().prepareCreate("blog1").get();
// 关掉连接
client.close();
}
@Test
public void deleteIndex() {
client.admin().indices().prepareDelete("blog").get();
// 关掉连接
client.close();
}
// 二、新建文档--使用json
@Test
public void createDocByJson() {
// 使用json创建Document
String json = "{" + "\"id\":\"1\"," + "\"title\":\"基于Lucene的搜索服务器\","
+ "\"content\":\"它提供了一个分布式多用户能力的全文搜索引擎，基于RESTful web接口\"" + "}";
// 创建文档
// 注意：这里面的参数id-"1"是ES的ID，和上面的"id"-Json串里的id 不是一个ID
IndexResponse indexResponse = client.prepareIndex("blog", "article", "1").setSource(json).execute().actionGet();
// 打印返回结果
System.out.println("index：" + indexResponse.getIndex());
System.out.println("type：" + indexResponse.getType());
System.out.println("id：" + indexResponse.getId());
System.out.println("version：" + indexResponse.getVersion());
System.out.println("result：" + indexResponse.getResult());
// 关闭连接
client.close();
}
// 三、新建文档--使用map
@Test
public void createDocByMap() {
// 源数据map构建器添加json
Map<String, Object> json = new HashMap<String, Object>();
json.put("id", "2");
json.put("title", "基于Lucene的搜索服务器");
json.put("content", "它提供了一个分布式多用户能力的全文搜索引擎，基于RESTful web接口");
// 创建文档
// 注意：这里没有传第三个数-ID,但是ES依然会自动产生ID的
IndexResponse indexResponse = client.prepareIndex("blog", "article").setSource(json).execute().actionGet();
// 打印返回结果
System.out.println("index：" + indexResponse.getIndex());
System.out.println("type：" + indexResponse.getType());
System.out.println("id：" + indexResponse.getId());
System.out.println("version：" + indexResponse.getVersion());
System.out.println("result：" + indexResponse.getResult());
// 关闭连接
client.close();
}
// 四、新建文档--使用es
@Test
public void createDocByXContent() throws Exception {
// 源数据es构建器添加json
XContentBuilder builder = XContentFactory.jsonBuilder().startObject().field("id", 5)
.field("title", "基于Lucene的搜索服务器").field("content", "它提供了一个分布式多用户能力的全文搜索引擎，基于RESTful web接口").endObject();
// 创建文档
// 注意：这里没有传第三个数-ID,但是ES依然会自动产生ID的
IndexResponse indexResponse = client.prepareIndex("blog", "article").setSource(builder).execute().actionGet();
// 打印返回结果
System.out.println("index：" + indexResponse.getIndex());
System.out.println("type：" + indexResponse.getType());
System.out.println("id：" + indexResponse.getId());
System.out.println("version：" + indexResponse.getVersion());
System.out.println("result：" + indexResponse.getResult());
// 关闭连接
client.close();
}
// 五、查询文档-单个索引
@Test
public void getData() {
// 注意：指定的id要存在-得是之前创建过的id-ES的id
GetResponse response = client.prepareGet("blog", "article", "1").get();
System.out.println(response.getSourceAsString());
client.close();
}
// 六、查询文档-多个索引
@Test
public void getMultiData() {
MultiGetResponse multiResponse = client.prepareMultiGet().add("blog", "article", "1")
.add("blog", "article", "1", "UnrO63MBy_Mwy4r5J6VY").add("blog", "article", "Rw3d8XMBfpkCch_aW3Da")
.get();
// 遍历返回的结果
for (MultiGetItemResponse response : multiResponse) {
GetResponse getResponse = response.getResponse();
if (getResponse.isExists()) {
String sourceAsString = getResponse.getSourceAsString();
System.out.println(sourceAsString);
}
}
client.close();
}
// 七、更新文档-update
@Test
public void updateData() throws Exception {
// 创建更新数据的请求对象
UpdateRequest updateRequest = new UpdateRequest();
updateRequest.index("blog");
updateRequest.type("article");
updateRequest.id("Rw3d8XMBfpkCch_aW3Da");
updateRequest.doc(XContentFactory.jsonBuilder().startObject()
// 对没有的字段添加, 对已有的字段替换
.field("title", "基于Lucene的搜索服务器").field("content", "它提供了一个分布式多用户能力的全文搜索引擎，基于RESTful web接口。大数据前景无限")
.field("createDate", "2017-8-22").endObject());
UpdateResponse indexResponse = client.update(updateRequest).get();
// 打印返回结果
System.out.println("index：" + indexResponse.getIndex());
System.out.println("type：" + indexResponse.getType());
System.out.println("id：" + indexResponse.getId());
System.out.println("version：" + indexResponse.getVersion());
System.out.println("result：" + indexResponse.getResult());
// 关闭连接
client.close();
}
// 八、更新文档-upsert
@Test
public void updateOrInsertData() throws Exception {
// 设置查询条件, 查找不到("blog", "article", "5")则添加
IndexRequest indexRequest = new IndexRequest("blog", "article", "5")
.source(XContentFactory.jsonBuilder().startObject().field("title", "基于Lucene的搜索服务器")
.field("content", "它提供了一个分布式多用户能力的全文搜索引擎，基于RESTful web接口。大数据前景无限").endObject());
// 设置更新, 查找("blog", "article", "5")就更新下面的设置
UpdateRequest upsert = new UpdateRequest("blog", "article", "5")
.doc(XContentFactory.jsonBuilder().startObject().field("user", "李四").endObject()).upsert(indexRequest);
client.update(upsert).get();
client.close();
}
// 九、删除数据-prepareDelete
@Test
public void deleteData() {
// 1 删除文档数据
DeleteResponse indexResponse = client.prepareDelete("blog", "article", "5").get();
// 2 打印返回的结果
System.out.println("index:" + indexResponse.getIndex());
System.out.println("type:" + indexResponse.getType());
System.out.println("id:" + indexResponse.getId());
System.out.println("version:" + indexResponse.getVersion());
System.out.println("found:" + indexResponse.getResult());
// 3 关闭连接
client.close();
}
// 十、查询所有--queryStringQuery
@Test
public void query() {
// 类似于like，对所有字段like
SearchResponse searchResponse = client.prepareSearch("blog").setTypes("article")
.setQuery(QueryBuilders.queryStringQuery("大数据")).get();
SearchHits hits = searchResponse.getHits();
System.out.println("查询结果有：" + hits.getTotalHits() + " 条");
for (SearchHit searchHits : hits) {
System.out.println(searchHits.getSourceAsString());
}
client.close();
}
// 十一、词条查询-TermQuery
// 注意：需要加入分词器，不然容易搜不到匹配的词
@Test
public void termQuery() {
// 类似于MySQL中的=
// 注意：这个=不是真正的=，它不是与字段等于，而是和字段的分词结果等于。
SearchResponse searchResponse = client.prepareSearch("blog").setTypes("article")
.setQuery(QueryBuilders.termQuery("content", "web")).get();
SearchHits hits = searchResponse.getHits();
System.out.println("查询结果有：" + hits.getTotalHits() + " 条");
for (SearchHit searchHits : hits) {
System.out.println(searchHits.getSourceAsString());
}
client.close();
}
// 十二、模糊查询-fuzzy
// 注意：需要加入分词器，不然容易搜不到匹配的词
@Test
public void fuzzyQuery() {
// 模糊查询
SearchResponse searchResponse = client.prepareSearch("blog").setTypes("article")
.setQuery(QueryBuilders.fuzzyQuery("content", "web")).get();
SearchHits hits = searchResponse.getHits();
System.out.println("查询结果有：" + hits.getTotalHits() + " 条");
for (SearchHit searchHits : hits) {
System.out.println(searchHits.getSourceAsString());
}
client.close();
}
// 十三、映射相关操作
@Test
public void createMapping() throws Exception {
//1.设置mapping
XContentBuilder builder = XContentFactory.jsonBuilder().startObject().startObject("article") // 表
.startObject("properties").startObject("id1") // properties里面有id1
.field("type", "text").field("store", "true").endObject().startObject("title2") // properties里面有title2
.field("type", "text").field("store", "false").endObject().startObject("content3") // properties里面有content3
.field("type", "text").field("store", "true").endObject().endObject().endObject().endObject();
//2.添加mapping
//注意：最好先新建一个索引-blog1,
// 或者将id和title和content名字都改一下，否则会操作失败
PutMappingRequest mappingRequest = Requests.putMappingRequest("blog1").type("article").source(builder);
client.admin().indices().putMapping(mappingRequest).get();
//3.关闭资源
client.close();
}
}
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