这里小编先将需要的pom.xml的依赖提供给大家:(根据自己的版本进行修改)
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UTF-8
1.7
1.7
2.3.2
junit
junit
4.10
org.elasticsearch.client
transport
6.2.0
org.scala-lang
scala-library
2.10.3
org.json
json
20180813
org.elasticsearch
elasticsearch-hadoop
6.2.4
org.apache.spark
spark-core_2.11
${spark.version}
org.apache.spark
spark-sql_2.11
${spark.version}
主要是提供一个Utils,通过读取配置文件进行创建ES的编程入口。
#elasticSearch.conf
elastic.host=192.168.130.131
elastic.port=9300
elastic.cluster.name=zzy-application
#Constants
public interface Constants {
String ELASTIC_HOST = "elastic.host";
String ELASTIC_PORT="elastic.port";
String ELASTIC_CLUSTER_NAME = "elastic.cluster.name";
}
#ElasticSearchUtil
import com.zy.es.constant.Constants;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Setting;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.TransportAddress;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.util.Properties;
/**
* 一般情况下的工具类都是单例
* 里面若干方法一般都是static
* 如果在连接集群的时候,集群的名称对应不上:
* NoNodeAvailableException[None of the configured nodes are available:
*/
public class ElasticSearchUtil {
private static TransportClient client;
private static Properties ps;
static {
try {
InputStream resourceAsStream = ElasticSearchUtil.class.getClassLoader().getResourceAsStream("elasticsearch.conf");
ps =new Properties();
ps.load(resourceAsStream);
String host=ps.getProperty(Constants.ELASTIC_HOST);
int port = Integer.parseInt(ps.getProperty(Constants.ELASTIC_PORT));
String clusterName=ps.getProperty(Constants.ELASTIC_CLUSTER_NAME);
Settings settings =Settings.builder()
.put("cluster.name",clusterName)
.build();
client=new PreBuiltTransportClient(settings);
//这里可以有多个,集群模式
TransportAddress ta=new TransportAddress(
InetAddress.getByName(host),
port
);
//addTransportAddresses(TransportAddress... transportAddress),参数为一个可变参数
client.addTransportAddresses(ta);
} catch (IOException e) {
e.printStackTrace();
}
}
public static TransportClient getTransportClient(){
return client;
}
public static void close(TransportClient client){
if(client!=null){
client.close();
}
}
}
小编这里提供了json、map、javabean、XContentBuilder四种创建方式。
import java.util
import com.zy.es.pojo.Book
import com.zy.es.utils.ElasticSearchUtil
import org.elasticsearch.action.index.IndexResponse
import org.elasticsearch.cluster.metadata.MetaData.XContentContext
import org.elasticsearch.common.xcontent.{XContentBuilder, XContentType}
import org.elasticsearch.common.xcontent.json.JsonXContent
import org.json.JSONObject
object createIndex {
private var index="library"
private var `type`="books"
private val client = ElasticSearchUtil.getTransportClient()
def main(args: Array[String]): Unit = {
createIndexByJson()
//createIndexByMap()
// createIndexByBean()
// createIndexByXContentBuilder()
//关闭es连接对象
ElasticSearchUtil.close(client)
}
/**
* 1.通过json方式创建
* java.lang.IllegalArgumentException: The number of object passed must be even but was [1]
* 在es5.x以上,使用XContentType.JSON来制定即可
*setSource(json.toString(),XContentType.JSON) 必须指定第二个参数。
*/
def createIndexByJson()={
val json=new JSONObject
json.put("name","我爱你中国")
json.put("author","周迅")
json.put("date","2018-6-6")
//返回创建后的结果
var response: IndexResponse = client.prepareIndex(index, `type`, "9")
.setSource(json.toString, XContentType.JSON).get()
//查看版本
println(response.getVersion)
}
/**
* 2.map方式
*/
def createIndexByMap(): Unit ={
val sourceMap=new util.HashMap[String,String]()
sourceMap.put("name","朝花夕拾")
sourceMap.put("author","鲁迅")
sourceMap.put("date","2009-4-5")
var response: IndexResponse = client.prepareIndex(index, `type`, "2").setSource(sourceMap)
.get()
//查看版本
println(response.getVersion)
}
/**
* 3.使用普通的javabean
*/
def createIndexByBean()={
val book:Book=new Book("斗破苍穹","天蚕土豆","2012-2-6");
val json=new JSONObject(book)
//返回创建后的结果
var response: IndexResponse = client.prepareIndex(index, `type`, "3")
.setSource(json.toString, XContentType.JSON).get()
//查看版本
println(response.getVersion)
}
/**
* 4.XContentBuilder方式
*/
def createIndexByXContentBuilder()={
var builder: XContentBuilder = JsonXContent.contentBuilder()
builder.startObject()
.field("name","西游记")
.field("author","吴承恩")
.field("version","1.0")
.endObject()
var response: IndexResponse = client.prepareIndex(index, `type`,"4").setSource(builder)
.get()
println(response.getVersion)
}
}
小编这里提供了删除数据,更新数据,批量操作。
import java.util
import com.zy.es.utils.ElasticSearchUtil
import org.elasticsearch.action.bulk.BulkResponse
import org.elasticsearch.action.delete.DeleteResponse
import org.elasticsearch.action.update.{UpdateRequestBuilder, UpdateResponse}
import org.elasticsearch.common.xcontent.{XContentBuilder, XContentType}
import org.elasticsearch.common.xcontent.json.JsonXContent
import org.json.JSONObject
object ElasticsearchCRUD {
private var index="library"
private var `type`="books"
private val client = ElasticSearchUtil.getTransportClient()
def main(args: Array[String]): Unit = {
//删除数据
testDelete()
//更新
//testUpdate()
//批量操作
//testBulk()
//关闭连接对象
ElasticSearchUtil.close(client)
}
//删除数据
def testDelete()={
var response: DeleteResponse = client.prepareDelete(index, `type`, "2").get()
println("version:"+response.getVersion)
}
//更新
def testUpdate()={
var builder: XContentBuilder = JsonXContent.contentBuilder()
builder.startObject()
.field("version","3.0")
.endObject()
var response: UpdateResponse = client.prepareUpdate(index, `type`, "4")
.setDoc(builder).get()
println("version:"+response.getVersion)
}
//批量操作
def testBulk()={
val map=new util.HashMap[String,String]()
map.put("name","无双")
map.put("author","周润发")
map.put("version","2")
val json=new JSONObject
json.put("name","红楼梦")
json.put("author","曹雪芹")
json.put("version","1.0")
var responses: BulkResponse = client.prepareBulk().add(client.prepareIndex(index, `type`, "7")
.setSource(map))
.add(client.prepareIndex(index, `type`, "8").setSource(json.toString(),XContentType.JSON))
.get()
for(response <-responses.getItems){
print(response.getVersion)
}
}
}
import java.util
import com.zy.es.utils.ElasticSearchUtil
import org.elasticsearch.action.search.{SearchResponse, SearchType}
import org.elasticsearch.index.query.QueryBuilders
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder
import org.elasticsearch.search.{SearchHit, SearchHits}
import org.json.JSONObject
import scala.collection.JavaConversions
object testSearch {
private var index="library"
private var `type`="books"
private val client = ElasticSearchUtil.getTransportClient()
def main(args: Array[String]): Unit = {
//全文索引
//fullTextSearch()
//分页索引
//pagingSearch()
//高亮索引
highlightSearch()
}
//全文索引
def fullTextSearch()={
val json=new JSONObject()
val response = client.prepareSearch(index) //设置检索的类型
.setSearchType(SearchType.DEFAULT) //设置检索的类型
.setQuery(QueryBuilders.matchQuery("author", "天蚕土豆")) //设置检索方式
.get()
val hits = response.getHits //获取检索结果
println("totals:"+hits.getTotalHits) //检索出的数据的个数
println("maxSource"+hits.getMaxScore) //最大的得分
//查询的具体的内容
val myhits = hits.getHits
for(hit <- myhits){
val index = hit.getIndex
val id = hit.getId
val `type` = hit.getType
val source =hit.getSourceAsString
val score=hit.getScore
json.put("_index",index)
json.put("_id",id)
json.put("_type",`type`)
json.put("_score", score )
json.put("_source",new JSONObject(source))
println(json.toString())
}
}
//分页索引
//分页查询:查询第num页,查count条 每一页的长度*(num-1)+count
def pagingSearch(from:Int=0,size:Int=10)={
var response: SearchResponse = client.prepareSearch(index)
.setSearchType(SearchType.QUERY_THEN_FETCH)
.setQuery(QueryBuilders.matchQuery("name", "西游记"))
.setFrom(from)
.setSize(size)
.get()
val myhits: SearchHits = response.getHits
val total=myhits.totalHits
println("zzy为您查询出"+total+"记录:")
val hits: Array[SearchHit] = myhits.getHits
for (hit<-hits){
val map: util.Map[String, AnyRef] = hit.getSourceAsMap
val author=map.get("author")
val name=map.get("name")
val version=map.get("version")
print(
s"""
|author:${author}
|name:${name}
|version:${version}
""".stripMargin)
}
}
//高亮索引
def highlightSearch()={
val response=client.prepareSearch(index)
.setSearchType(SearchType.DEFAULT)
.setQuery(QueryBuilders.matchQuery("author","周润发"))
.highlighter(new HighlightBuilder()
.field("author")//给哪个字段添加标签
.preTags("")//添加的前置标签
.postTags(""))//添加的后置标签
.get()
val myHits = response.getHits
val total = myHits.totalHits
println("zzy为您查询出" + total + "记录:")
val hits: Array[SearchHit] = myHits.getHits
for(hit <-hits){
//注意这里如果想要获取高亮的字段,必须使用高亮的方式获取
val HLfields = hit.getHighlightFields
//这里的field是设置高亮的字段名:author highlight查询的所有的字段值(含高亮的)
for((field,highlight)<-JavaConversions.mapAsScalaMap(HLfields)){
var date=""
val fragments=highlight.getFragments
for(fragment <-fragments){
date+=fragment.toString
}
print(date)
}
}
}
}
首先我们现在自己的ES集群中添加一些数据:
#创建索引库
curl -H "Content-Type: application/json" -XPUT 'http://192.168.130.131:9200/chinese'
#添加数据
curl -H "Content-Type: application/json" -XPOST http://192.168.130.131:9200/chinese/fulltext/1 -d'{"content":"美国留给伊拉克的是个烂摊子吗"}'
curl -H "Content-Type: application/json" -XPOST http://192.168.130.131:9200/chinese/fulltext/2 -d'{"content":"公安部:各地校车将享最高路权"}'
curl -H "Content-Type: application/json" -XPOST http://192.168.130.131:9200/chinese/fulltext/3 -d'{"content":"中韩渔警冲突调查:韩警平均每天扣1艘中国渔船"}'
curl -H "Content-Type: application/json" -XPOST http://192.168.130.131:9200/chinese/fulltext/4 -d'{"content":"中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"}'
#然后使用不同的查询看看效果:
import com.zy.es.utils.ElasticSearchUtil
import org.elasticsearch.action.search.{SearchResponse, SearchType}
import org.elasticsearch.index.query.QueryBuilders
object ChineseParticipleSearch {
private var index="chinese"
private var `type`="fulltext"
private val client = ElasticSearchUtil.getTransportClient()
def main(args: Array[String]): Unit = {
val response: SearchResponse =client.prepareSearch(index)
.setSearchType(SearchType.QUERY_THEN_FETCH)
.setQuery(QueryBuilders.matchQuery("content","中国"))
.get()
val myHits = response.getHits.getHits
for(hit <- myHits){
println(hit.getSourceAsString)
}
}
}
注意:我们这里使用match查询,查询了是“中国”
看看运行结果:
这里为什么美国也会被查询出来?
这是因为:原生的查询将‘中国’这个两个字分开之后在进行检索,索引会出现上图中的查询错误的情况。
那我们该怎么办呢,我只想查询出来有关中国的内容啊,没关系中文分词帮你解决。
常见的中文分词插件:IK,庖丁解牛中文分词等等。这里我们使用IK分词。
① 下载: https://github.com/medcl/elasticsearch-analysis-ik 版本对应
② 使用maven对源代码进行编译(在IK_HOME下):(mvn clean install -DskipTests)
③ 把编译后的target/releases下的zip文件拷贝到 ES_HOME/plugins/analysis-ik目录下面,然后解压将其中的plugin-descriptor.properties 和plugin-security.policy文件中的ES的版本改为自己使用的版本
④ 修改ES_HOME/config/elasticsearch.yml文件,添加(ES6.x以上版本无需此操作)index.analysis.analyzer.default.type: ik
⑤ 重启es服务
这里小编就有些粗暴了:
#ps -aux|grep elasticsearch
#kill -9 pid
#/ES_HOME/bin/elasticsearch -d 启动
第一步: 将之前数据进行删除
curl -XDELETE 'http://192.168.130.131:9200/chinese/1'
curl -XDELETE 'http://192.168.130.131:9200/chinese/2'
curl -XDELETE 'http://192.168.130.131:9200/chinese/3'
curl -XDELETE 'http://192.168.130.131:9200/chinese/4'
第二步: 重新加载数据,并设置为IK分词
#设置为ik分词
curl -XPOST http://192.168.130.131:9200/chinese/fulltext/_mapping -H 'Content-Type:application/json' -d'
{
"properties": {
"content": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_max_word"
}
}
}'
#添加数据
curl -H "Content-Type: application/json" -XPOST http://192.168.130.131:9200/chinese/fulltext/1 -d'{"content":"美国留给伊拉克的是个烂摊子吗"}'
curl -H "Content-Type: application/json" -XPOST http://192.168.130.131:9200/chinese/fulltext/2 -d'{"content":"公安部:各地校车将享最高路权"}'
curl -H "Content-Type: application/json" -XPOST http://192.168.130.131:9200/chinese/fulltext/3 -d'{"content":"中韩渔警冲突调查:韩警平均每天扣1艘中国渔船"}'
curl -H "Content-Type: application/json" -XPOST http://192.168.130.131:9200/chinese/fulltext/4 -d'{"content":"中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"}'
第三步:
重新执行刚刚上面的代码,这里我们看看结果:
整合条件:
ES官网:
https://www.elastic.co/guide/en/elasticsearch/hadoop/current/install.html
maven依赖:https://mvnrepository.com/artifact/org.elasticsearch/elasticsearch-hadoop/6.2.4
org.elasticsearch
elasticsearch-hadoop
6.2.4
//如果使用spark中可以读到ES中的数据,需要导入隐式转换
import java.util.Date
import com.zy.es.utils.ElasticSearchUtil
import org.apache.spark.rdd.RDD
import org.apache.spark.{SparkConf, SparkContext}
import org.elasticsearch.cluster.metadata.MetaData.XContentContext
import org.elasticsearch.common.xcontent.XContentType
import org.elasticsearch.spark._
/**
* spark整合ES
* 通过spark去读取es中的数据,同时将操作之后的结果落地到ES
*/
object EsOnSpark {
private val client = ElasticSearchUtil.getTransportClient()
def main(args: Array[String]): Unit = {
val conf = new SparkConf()
conf.setAppName("EsOnSpark")
.setMaster("local[2]")
.set("es.index.auto.create", "true") //写数据的时候如果索引库不存在,自动创建
.set("es.nodes", "192.168.130.131") //设置ES集群的节点
.set("es.port", "9200") //设置ES集群的端口
val sc = new SparkContext(conf)
var EsRDD: RDD[(String, String)] = sc.esJsonRDD("library/books") //指定index/type
var index = "es-spark"
var `type` = "book"
EsRDD.foreach { case (id, json) => {
client.prepareIndex(index, `type`, new Date().getTime.toString)
.setSource(json, XContentType.JSON).get()
println(id + "" + json)
}
}
sc.stop()
}
}
这里只是小编介绍一些常见的API操作,大家知道ES最大的优势在于他的查询,后期小编会进一步的补充关于ElasticSearch强大的查询功能的API。
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