•SpringBoot 版本:2.2.4
•ElasticSearch 版本:6.5.3
ElasticSearch 是一个基于 Lucene 的搜索服务器。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。Elasticsearch 是用 Java 语言开发的,并作为 Apache 许可条款下的开放源码发布,是一种流行的企业级搜索引擎。
ElasticSearch 用于云计算中,能够达到实时搜索,稳定,可靠,快速,安装使用方便。
•分布式的文档存储引擎•分布式的搜索引擎和分析引擎•分布式,支持PB级数据
•搜索领域: 如百度、谷歌,全文检索等。•门户网站: 访问统计、文章点赞、留言评论等。•广告推广: 记录员工行为数据、消费趋势、员工群体进行定制推广等。•信息采集: 记录应用的埋点数据、访问日志数据等,方便大数据进行分析。
在 Elasticsearch
中,文档归属于一种类型 type
,而这些类型存在于索引 index
中,我们可以列一些简单的不同点,来类比传统关系型数据库:
•Relational DB -> Databases -> Tables -> Rows -> Columns•Elasticsearch -> Indices -> Types -> Documents -> Fields
Elasticsearch 集群可以包含多个索引 indices
,每一个索引可以包含多个类型 types
,每一个类型包含多个文档 documents
,然后每个文档包含多个字段 Fields
。而在 DB 中可以有多个数据库 Databases
,每个库中可以有多张表 Tables
,每个表中又包含多行Rows
,每行包含多列Columns
。
•索引基本概念(indices):
索引是含义相同属性的文档集合,是 ElasticSearch 的一个逻辑存储,可以理解为关系型数据库中的数据库,ElasticSearch 可以把索引数据存放到一台服务器上,也可以 sharding 后存到多台服务器上,每个索引有一个或多个分片,每个分片可以有多个副本。
•索引类型(index_type):
索引可以定义一个或多个类型,文档必须属于一个类型。在 ElasticSearch
中,一个索引对象可以存储多个不同用途的对象,通过索引类型可以区分单个索引中的不同对象,可以理解为关系型数据库中的表。每个索引类型可以有不同的结构,但是不同的索引类型不能为相同的属性设置不同的类型。
•文档(document):文档是可以被索引的基本数据单位。存储在 ElasticSearch 中的主要实体叫文档 document
,可以理解为关系型数据库中表的一行记录。每个文档由多个字段构成,ElasticSearch 是一个非结构化的数据库,每个文档可以有不同的字段,并且有一个唯一的标识符。
•映射(mapping):
ElasticSearch
的 Mapping
非常类似于静态语言中的数据类型:声明一个变量为 int 类型的变量,以后这个变量都只能存储 int
类型的数据。同样的,一个 number
类型的 mapping
字段只能存储 number
类型的数据。
同语言的数据类型相比,Mapping
还有一些其他的含义,Mapping
不仅告诉 ElasticSearch 一个 Field
中是什么类型的值, 它还告诉 ElasticSearch 如何索引数据以及数据是否能被搜索到。
ElaticSearch 默认是动态创建索引和索引类型的 Mapping 的。这就相当于无需定义 Solr
中的 Schema
,无需指定各个字段的索引规则就可以索引文件,很方便。但有时方便就代表着不灵活。比如,ElasticSearch 默认一个字段是要做分词的,但我们有时要搜索匹配整个字段却不行。如有统计工作要记录每个城市出现的次数。对于 name
字段,若记录 new york
文本,ElasticSearch 可能会把它拆分成 new
和 york
这两个词,分别计算这个两个单词的次数,而不是我们期望的 new york
。
下面介绍下 SpringBoot 如何通过 elasticsearch-rest-high-level-client
工具操作 ElasticSearch
,这里需要说一下,为什么没有使用 Spring 家族封装的 spring-data-elasticsearch
。
主要原因是灵活性和更新速度,Spring 将 ElasticSearch 过度封装,让开发者很难跟 ES 的 DSL 查询语句进行关联。再者就是更新速度,ES 的更新速度是非常快,但是 spring-data-elasticsearch 更新速度比较缓慢。
由于上面两点,所以选择了官方推出的 Java 客户端 elasticsearch-rest-high-level-client
,它的代码写法跟 DSL 语句很相似,懂 ES 查询的使用其上手很快。
示例项目地址
•lombok: lombok 工具依赖。
•fastjson: 用于将 JSON 转换对象的依赖。
•spring-boot-starter-web: SpringBoot 的 Web 依赖。
•elasticsearch-rest-high-level-client: 用于操作 ES 的 Java 客户端。
•elasticsearch: ElasticSearch 依赖。在操作 ES Server 时候我们需要保证 ES 客户端和其保持一致。但是,在使用 elasticsearch-rest-high-level-client
时候,发现其依赖的 elasticsearch
依赖包并不和自身指定的版本相符,导致出现兼容问题。所以,这里我们手动引入该依赖来替换 elasticsearch-rest-high-level-client
依赖中的默认的 elasticsearch
依赖。
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.2.4.RELEASEversion>
<relativePath/>
parent>
<groupId>club.mydlqgroupId>
<artifactId>springboot-elasticsearch-exampleartifactId>
<version>0.0.1-SNAPSHOTversion>
<name>springboot-elasticsearch-examplename>
<description>Demo project for Spring Boot ElasticSearchdescription>
<properties>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>fastjsonartifactId>
<version>1.2.61version>
dependency>
<dependency>
<groupId>org.elasticsearch.clientgroupId>
<artifactId>elasticsearch-rest-high-level-clientartifactId>
<version>6.5.4version>
dependency>
<dependency>
<groupId>org.elasticsearchgroupId>
<artifactId>elasticsearchartifactId>
<version>6.5.4version>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
(1)、application.yml 配置文件
为了方便更改连接 ES 的连接配置,所以我们将配置信息放置于 application.yaml 中:
server:
port: 8080
spring:
application:
name: springboot-elasticsearch-example
elasticsearch:
schema: http
address: 127.0.0.1:9200
connectTimeout: 10000
socketTimeout: 10000
connectionRequestTimeout: 10000
maxConnectNum: 100
maxConnectPerRoute: 100
(2)、java 连接配置类
这里需要写一个 Java 配置类读取 application 中的配置信息:
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.ArrayList;
import java.util.List;
/**
* ElasticSearch 配置
*/
@Configuration
public class ElasticSearchConfig {
/** 协议 */
@Value("${elasticsearch.schema:http}")
private String schema;
/** 集群地址,如果有多个用“,”隔开 */
@Value("${elasticsearch.address}")
private String address;
/** 连接超时时间 */
@Value("${elasticsearch.connectTimeout:5000}")
private int connectTimeout;
/** Socket 连接超时时间 */
@Value("${elasticsearch.socketTimeout:10000}")
private int socketTimeout;
/** 获取连接的超时时间 */
@Value("${elasticsearch.connectionRequestTimeout:5000}")
private int connectionRequestTimeout;
/** 最大连接数 */
@Value("${elasticsearch.maxConnectNum:100}")
private int maxConnectNum;
/** 最大路由连接数 */
@Value("${elasticsearch.maxConnectPerRoute:100}")
private int maxConnectPerRoute;
@Bean
public RestHighLevelClient restHighLevelClient() {
// 拆分地址
List<HttpHost> hostLists = new ArrayList<>();
String[] hostList = address.split(",");
for (String addr : hostList) {
String host = addr.split(":")[0];
String port = addr.split(":")[1];
hostLists.add(new HttpHost(host, Integer.parseInt(port), schema));
}
// 转换成 HttpHost 数组
HttpHost[] httpHost = hostLists.toArray(new HttpHost[]{});
// 构建连接对象
RestClientBuilder builder = RestClient.builder(httpHost);
// 异步连接延时配置
builder.setRequestConfigCallback(requestConfigBuilder -> {
requestConfigBuilder.setConnectTimeout(connectTimeout);
requestConfigBuilder.setSocketTimeout(socketTimeout);
requestConfigBuilder.setConnectionRequestTimeout(connectionRequestTimeout);
return requestConfigBuilder;
});
// 异步连接数配置
builder.setHttpClientConfigCallback(httpClientBuilder -> {
httpClientBuilder.setMaxConnTotal(maxConnectNum);
httpClientBuilder.setMaxConnPerRoute(maxConnectPerRoute);
return httpClientBuilder;
});
return new RestHighLevelClient(builder);
}
}
这里示例会指出通过 Kibana 的 Restful 工具操作与对应的 Java 代码操作的两个示例。
创建索引
创建名为 mydlq-user
的索引与对应 Mapping。
PUT /mydlq-user{ "mappings": { "doc": { "dynamic": true, "properties": { "name": { "type": "text", "fields": { "keyword": { "type": "keyword" } } }, "address": { "type": "text", "fields": { "keyword": { "type": "keyword" } } }, "remark": { "type": "text", "fields": { "keyword": { "type": "keyword" } } }, "age": { "type": "integer" }, "salary": { "type": "float" }, "birthDate": { "type": "date", "format": "yyyy-MM-dd" }, "createTime": { "type": "date" } } } }}
删除索引
删除 mydlq-user 索引。
DELETE /mydlq-user
package club.mydlq.elasticsearch.service.base;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;
import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.admin.indices.get.GetIndexRequest;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
/**
* 索引操作
*/
@Slf4j
@Service
public class IndexService {
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* 验证索引是否存在
*/
public Object existsIndex() {
Object result = "";
try {
// 获取索引请求
GetIndexRequest request = new GetIndexRequest();
// 设置要查询的索引名称
request.indices("mydlq-user");
// 执行请求,验证索引是否存在
boolean isExist = restHighLevelClient.indices().exists(request, RequestOptions.DEFAULT);
log.info("是否存在:{}", isExist);
// 根据具体业务逻辑返回不同结果,这里为了方便直接将结果返回
result = isExist;
} catch (IOException e) {
log.error("", e);
}
return result;
}
/**
* 创建索引
*/
public Object createIndex() {
Object result = "";
try {
// 创建 Mapping
XContentBuilder mapping = XContentFactory.jsonBuilder()
.startObject()
.field("dynamic", true)
.startObject("properties")
.startObject("name")
.field("type","text")
.startObject("fields")
.startObject("keyword")
.field("type","keyword")
.endObject()
.endObject()
.endObject()
.startObject("address")
.field("type","text")
.startObject("fields")
.startObject("keyword")
.field("type","keyword")
.endObject()
.endObject()
.endObject()
.startObject("remark")
.field("type","text")
.startObject("fields")
.startObject("keyword")
.field("type","keyword")
.endObject()
.endObject()
.endObject()
.startObject("age")
.field("type","integer")
.endObject()
.startObject("salary")
.field("type","float")
.endObject()
.startObject("birthDate")
.field("type","date")
.field("format", "yyyy-MM-dd")
.endObject()
.startObject("createTime")
.field("type","date")
.endObject()
.endObject()
.endObject();
// 创建索引配置信息,配置
Settings settings = Settings.builder()
.put("index.number_of_shards", 1)
.put("index.number_of_replicas", 0)
.build();
// 新建创建索引请求对象,然后设置索引类型(ES 7.0 将不存在索引类型)和 mapping 与 index 配置
CreateIndexRequest request = new CreateIndexRequest("mydlq-user", settings);
request.mapping("doc", mapping);
// RestHighLevelClient 执行创建索引
CreateIndexResponse createIndexResponse = restHighLevelClient.indices().create(request, RequestOptions.DEFAULT);
// 判断是否创建成功
boolean isCreated = createIndexResponse.isAcknowledged();
log.info("是否创建成功:{}", isCreated);
// 根据具体业务逻辑返回不同结果,这里为了方便直接将结果返回
result = isCreated;
} catch (IOException e) {
log.error("", e);
}
return result;
}
/**
* 删除索引
*/
public Object deleteIndex() {
Object result = "";
try {
// 新建删除索引请求对象
DeleteIndexRequest request = new DeleteIndexRequest("mydlq-user");
// 执行删除索引
AcknowledgedResponse acknowledgedResponse = restHighLevelClient.indices().delete(request, RequestOptions.DEFAULT);
// 判断是否删除成功
boolean siDeleted = acknowledgedResponse.isAcknowledged();
log.info("是否删除成功:{}", siDeleted);
// 根据具体业务逻辑返回不同结果,这里为了方便直接将结果返回
result = siDeleted;
} catch (IOException e) {
log.error("", e);
}
return result;
}
}
增加文档信息
在索引 mydlq-user
中增加一条文档信息。
POST /mydlq-user/doc{ "address": "北京市", "age": 29, "birthDate": "1990-01-10", "createTime": 1579530727699, "name": "张三", "remark": "来自北京市的张先生", "salary": 100}
获取文档信息
获取 mydlq-user
的索引 id=1 的文档信息。
GET /mydlq-user/doc/1
更新文档信息
更新之前创建的 id=1 的文档信息。
PUT /mydlq-user/doc/1{ "address": "北京市海淀区", "age": 29, "birthDate": "1990-01-10", "createTime": 1579530727699, "name": "张三", "remark": "来自北京市的张先生", "salary": 100}
删除文档信息
删除之前创建的 id=1 的文档信息。
DELETE /mydlq-user/doc/1
package club.mydlq.elasticsearch.service.base;
import club.mydlq.elasticsearch.model.entity.UserInfo;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.search.fetch.subphase.FetchSourceContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
import java.util.Date;
/**
* 文档操作
*/
@Slf4j
@Service
public class DocumentService {
@Autowired
private RestHighLevelClient restHighLevelClient;
public Object existsDocument() {
Object result = "";
try {
// 获取请求对象
GetRequest getRequest = new GetRequest("mydlq-user", "doc", "1");
// 是否获取源码内容
getRequest.fetchSourceContext(new FetchSourceContext(false));
// 执行请求,验证文档是否存在
boolean isExist = restHighLevelClient.exists(getRequest, RequestOptions.DEFAULT);
log.info("文档是否存在:{}", isExist);
// 根据具体业务逻辑返回不同结果,这里为了方便直接将结果返回
result = isExist;
} catch (IOException e) {
log.error("", e);
}
return result;
}
public Object getDocument() {
Object result = "";
try {
// 获取请求对象
GetRequest getRequest = new GetRequest("mydlq-user", "doc", "1");
// 获取文档信息
GetResponse getResponse = restHighLevelClient.get(getRequest, RequestOptions.DEFAULT);
// 将 JSON 转换成对象
if (getResponse.isExists()) {
UserInfo userInfo = JSON.parseObject(getResponse.getSourceAsBytes(), UserInfo.class);
log.info("用户信息:{}", userInfo);
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将结果返回
result = getResponse.getSourceAsString();
} catch (IOException e) {
log.error("", e);
}
return result;
}
public Object addDocument() {
Object result = "";
try {
// 创建索引请求对象
IndexRequest indexRequest = new IndexRequest("mydlq-user", "doc", "1");
// 创建用户信息
UserInfo userInfo = new UserInfo();
userInfo.setName("张三");
userInfo.setAge(29);
userInfo.setSalary(100.00f);
userInfo.setAddress("北京市");
userInfo.setRemark("来自北京市的张先生");
userInfo.setCreateTime(new Date());
userInfo.setBirthDate("1990-01-10");
// 将对象转换为 byte 数组
byte[] json = JSON.toJSONBytes(userInfo);
// 设置文档内容
indexRequest.source(json, XContentType.JSON);
// 执行增加文档
IndexResponse response = restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);
log.info("创建状态:{}", response.status());
// 根据具体业务逻辑返回不同结果,这里为了方便直接将结果返回
result = response.getResult();
} catch (Exception e) {
log.error("", e);
}
return result;
}
public Object updateDocument() {
Object result = "";
try {
// 创建索引请求对象
UpdateRequest updateRequest = new UpdateRequest("mydlq-user", "doc", "1");
// 设置用户更新信息
UserInfo userInfo = new UserInfo();
userInfo.setSalary(200.00f);
userInfo.setAddress("北京市海淀区");
// 将对象转换为 byte 数组
byte[] json = JSON.toJSONBytes(userInfo);
// 设置更新文档内容
updateRequest.doc(json, XContentType.JSON);
// 执行更新文档
UpdateResponse response = restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);
log.info("创建状态:{}", response.status());
// 根据具体业务逻辑返回不同结果,这里为了方便直接将结果返回
result = response.getResult();
} catch (Exception e) {
log.error("", e);
}
return result;
}
public Object deleteDocument() {
Object result = "";
try {
// 创建删除请求对象
DeleteRequest deleteRequest = new DeleteRequest("mydlq-user", "doc", "1");
// 执行删除文档
DeleteResponse response = restHighLevelClient.delete(deleteRequest, RequestOptions.DEFAULT);
log.info("删除状态:{}", response.status());
// 根据具体业务逻辑返回不同结果,这里为了方便直接将结果返回
result = response.getResult();
} catch (IOException e) {
log.error("", e);
}
return result;
}
}
执行查询示例前,先往索引中插入一批数据:
•POST mydlq-user/_doc
{"name":"零零","address":"北京市丰台区","remark":"低层员工","age":29,"salary":3000,"birthDate":"1990-11-11","createTime":"2019-11-11T08:18:00.000Z"}
•POST _bulk
{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"刘一","address":"北京市丰台区","remark":"低层员工","age":30,"salary":3000,"birthDate":"1989-11-11","createTime":"2019-03-15T08:18:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"陈二","address":"北京市昌平区","remark":"中层员工","age":27,"salary":7900,"birthDate":"1992-01-25","createTime":"2019-11-08T11:15:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"张三","address":"北京市房山区","remark":"中层员工","age":28,"salary":8800,"birthDate":"1991-10-05","createTime":"2019-07-22T13:22:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"李四","address":"北京市大兴区","remark":"高层员工","age":26,"salary":9000,"birthDate":"1993-08-18","createTime":"2019-10-17T15:00:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"王五","address":"北京市密云区","remark":"低层员工","age":31,"salary":4800,"birthDate":"1988-07-20","createTime":"2019-05-29T09:00:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"赵六","address":"北京市通州区","remark":"中层员工","age":32,"salary":6500,"birthDate":"1987-06-02","createTime":"2019-12-10T18:00:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"孙七","address":"北京市朝阳区","remark":"中层员工","age":33,"salary":7000,"birthDate":"1986-04-15","createTime":"2019-06-06T13:00:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"周八","address":"北京市西城区","remark":"低层员工","age":32,"salary":5000,"birthDate":"1987-09-26","createTime":"2019-01-26T14:00:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"吴九","address":"北京市海淀区","remark":"高层员工","age":30,"salary":11000,"birthDate":"1989-11-25","createTime":"2019-09-07T13:34:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"郑十","address":"北京市东城区","remark":"低层员工","age":29,"salary":5000,"birthDate":"1990-12-25","createTime":"2019-03-06T12:08:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"萧十一","address":"北京市平谷区","remark":"低层员工","age":29,"salary":3300,"birthDate":"1990-11-11","createTime":"2019-03-10T08:17:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"曹十二","address":"北京市怀柔区","remark":"中层员工","age":27,"salary":6800,"birthDate":"1992-01-25","createTime":"2019-12-03T11:09:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"吴十三","address":"北京市延庆区","remark":"中层员工","age":25,"salary":7000,"birthDate":"1994-10-05","createTime":"2019-07-27T14:22:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"冯十四","address":"北京市密云区","remark":"低层员工","age":25,"salary":3000,"birthDate":"1994-08-18","createTime":"2019-04-22T15:00:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"蒋十五","address":"北京市通州区","remark":"低层员工","age":31,"salary":2800,"birthDate":"1988-07-20","createTime":"2019-06-13T10:00:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"苗十六","address":"北京市门头沟区","remark":"高层员工","age":32,"salary":11500,"birthDate":"1987-06-02","createTime":"2019-11-11T18:00:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"鲁十七","address":"北京市石景山区","remark":"高员工","age":33,"salary":9500,"birthDate":"1986-04-15","createTime":"2019-06-06T14:00:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"沈十八","address":"北京市朝阳区","remark":"中层员工","age":31,"salary":8300,"birthDate":"1988-09-26","createTime":"2019-09-25T14:00:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"吕十九","address":"北京市西城区","remark":"低层员工","age":31,"salary":4500,"birthDate":"1988-11-25","createTime":"2019-09-22T13:34:00.000Z"}{"index":{"_index":"mydlq-user","_type":"doc"}}{"name":"丁二十","address":"北京市东城区","remark":"低层员工","age":33,"salary":2100,"birthDate":"1986-12-25","createTime":"2019-03-07T12:08:00.000Z"}
插入完成后再查询数据,查看之前插入的数据是否存在:
GET mydlq-user/_search
执行后得到下面记录:
{ "took": 2, "timed_out": false, "_shards": { "total": 1, "successful": 1, "skipped": 0, "failed": 0 }, "hits": { "total": 20, "max_score": 1, "hits": [ { "_index": "mydlq-user", "_type": "_doc", "_id": "BeN0BW8B7BNodGwRFTRj", "_score": 1, "_source": { "name": "刘一", "address": "北京市丰台区", "remark": "低层员工", "age": 30, "salary": 3000, "birthDate": "1989-11-11", "createTime": "2019-03-15T08:18:00.000Z" } }, { "_index": "mydlq-user", "_type": "_doc", "_id": "BuN0BW8B7BNodGwRFTRj", "_score": 1, "_source": { "name": "陈二", "address": "北京市昌平区", "remark": "中层员工", "age": 27, "salary": 7900, "birthDate": "1992-01-25", "createTime": "2019-11-08T11:15:00.000Z" } }, { "_index": "mydlq-user", "_type": "_doc", "_id": "B-N0BW8B7BNodGwRFTRj", "_score": 1, "_source": { "name": "张三", "address": "北京市房山区", "remark": "中层员工", "age": 28, "salary": 8800, "birthDate": "1991-10-05", "createTime": "2019-07-22T13:22:00.000Z" } }, { "_index": "mydlq-user", "_type": "_doc", "_id": "CON0BW8B7BNodGwRFTRj", "_score": 1, "_source": { "name": "李四", "address": "北京市大兴区", "remark": "高层员工", "age": 26, "salary": 9000, "birthDate": "1993-08-18", "createTime": "2019-10-17T15:00:00.000Z" } }, { "_index": "mydlq-user", "_type": "_doc", "_id": "CeN0BW8B7BNodGwRFTRj", "_score": 1, "_source": { "name": "王五", "address": "北京市密云区", "remark": "低层员工", "age": 31, "salary": 4800, "birthDate": "1988-07-20", "createTime": "2019-05-29T09:00:00.000Z" } }, { "_index": "mydlq-user", "_type": "_doc", "_id": "CuN0BW8B7BNodGwRFTRj", "_score": 1, "_source": { "name": "赵六", "address": "北京市通州区", "remark": "中层员工", "age": 32, "salary": 6500, "birthDate": "1987-06-02", "createTime": "2019-12-10T18:00:00.000Z" } }, { "_index": "mydlq-user", "_type": "_doc", "_id": "C-N0BW8B7BNodGwRFTRj", "_score": 1, "_source": { "name": "孙七", "address": "北京市朝阳区", "remark": "中层员工", "age": 33, "salary": 7000, "birthDate": "1986-04-15", "createTime": "2019-06-06T13:00:00.000Z" } }, { "_index": "mydlq-user", "_type": "_doc", "_id": "DON0BW8B7BNodGwRFTRj", "_score": 1, "_source": { "name": "周八", "address": "北京市西城区", "remark": "低层员工", "age": 32, "salary": 5000, "birthDate": "1987-09-26", "createTime": "2019-01-26T14:00:00.000Z" } }, { "_index": "mydlq-user", "_type": "_doc", "_id": "DeN0BW8B7BNodGwRFTRj", "_score": 1, "_source": { "name": "吴九", "address": "北京市海淀区", "remark": "高层员工", "age": 30, "salary": 11000, "birthDate": "1989-11-25", "createTime": "2019-09-07T13:34:00.000Z" } }, { "_index": "mydlq-user", "_type": "_doc", "_id": "DuN0BW8B7BNodGwRFTRj", "_score": 1, "_source": { "name": "郑十", "address": "北京市东城区", "remark": "低层员工", "age": 29, "salary": 5000, "birthDate": "1990-12-25", "createTime": "2019-03-06T12:08:00.000Z" } } ] }}
精确查询
精确查询,查询地址为 北京市通州区
的人员信息:
查询条件不会进行分词,但是查询内容可能会分词,导致查询不到。之前在创建索引时设置 Mapping 中 address 字段存在 keyword 字段是专门用于不分词查询的子字段。
GET mydlq-user/_search{ "query": { "term": { "address.keyword": { "value": "北京市通州区" } } }}
精确查询-多内容查询
精确查询,查询地址为 北京市丰台区
、北京市昌平区
或 北京市大兴区
的人员信息:
GET mydlq-user/_search{ "query": { "terms": { "address.keyword": [ "北京市丰台区", "北京市昌平区", "北京市大兴区" ] } }}
package club.mydlq.elasticsearch.service.query;
import club.mydlq.elasticsearch.model.entity.UserInfo;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
/**
* 精确查询
*/
@Slf4j
@Service
public class TermQueryService {
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* 精确查询(查询条件不会进行分词,但是查询内容可能会分词,导致查询不到)
*/
public Object termQuery() {
Object result = "";
try {
// 构建查询条件(注意:termQuery 支持多种格式查询,如 boolean、int、double、string 等,这里使用的是 string 的查询)
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.termQuery("address.keyword", "北京市通州区"));
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
} catch (IOException e) {
log.error("", e);
}
return result;
}
/**
* 多个内容在一个字段中进行查询
*/
public Object termsQuery() {
Object result = "";
try {
// 构建查询条件(注意:termsQuery 支持多种格式查询,如 boolean、int、double、string 等,这里使用的是 string 的查询)
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.termsQuery("address.keyword", "北京市丰台区", "北京市昌平区", "北京市大兴区"));
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
} catch (IOException e) {
log.error("", e);
}
return result;
}
}
匹配查询全部数据与分页
匹配查询符合条件的所有数据,并且设置以 salary
字段升序排序,并设置分页:
GET mydlq-user/_search{ "query": { "match_all": {} }, "from": 0, "size": 10, "sort": [ { "salary": { "order": "asc" } } ]}
匹配查询数据
匹配查询地址为 通州区
的数据:
GET mydlq-user/_search{ "query": { "match": { "address": "通州区" } }}
词语匹配查询
词语匹配进行查询,匹配 address
中为 北京市通州区
的员工信息:
GET mydlq-user/_search{ "query": { "match_phrase": { "address": "北京市通州区" } }}
内容多字段查询
查询在字段 address
、remark
中存在 北京
内容的员工信息:
GET mydlq-user/_search{ "query": { "multi_match": { "query": "北京", "fields": ["address","remark"] } }}
package club.mydlq.elasticsearch.service.query;
import club.mydlq.elasticsearch.model.entity.UserInfo;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.MatchAllQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
/**
* 匹配查询
*/
@Slf4j
@Service
public class MatchQueryService {
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* 匹配查询符合条件的所有数据,并设置分页
*/
public Object matchAllQuery() {
Object result = "";
try {
// 构建查询条件
MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();
// 创建查询源构造器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(matchAllQueryBuilder);
// 设置分页
searchSourceBuilder.from(0);
searchSourceBuilder.size(3);
// 设置排序
searchSourceBuilder.sort("salary", SortOrder.ASC);
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
} catch (IOException e) {
log.error("", e);
}
return result;
}
/**
* 匹配查询数据
*/
public Object matchQuery() {
Object result = "";
try {
// 构建查询条件
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.matchQuery("address", "通州区"));
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
} catch (IOException e) {
log.error("", e);
}
return result;
}
/**
* 词语匹配查询
*/
public Object matchPhraseQuery() {
Object result = "";
try {
// 构建查询条件
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.matchPhraseQuery("address", "北京市通州区"));
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
} catch (IOException e) {
log.error("", e);
}
return result;
}
/**
* 内容在多字段中进行查询
*/
public Object matchMultiQuery() {
Object result = "";
try {
// 构建查询条件
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.multiMatchQuery("北京市", "address", "remark"));
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
} catch (IOException e) {
log.error("", e);
}
return result;
}
}
模糊查询所有以 三
结尾的姓名
GET mydlq-user/_search{ "query": { "fuzzy": { "name": "三" } }}
package club.mydlq.elasticsearch.service.query;
import club.mydlq.elasticsearch.model.entity.UserInfo;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.unit.Fuzziness;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
/**
* 模糊查询
*/
@Slf4j
@Service
public class FuzzyQueryService {
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* 模糊查询所有以 “三” 结尾的姓名
*/
public Object fuzzyQuery() {
Object result = "";
try {
// 构建查询条件
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.fuzzyQuery("name", "三").fuzziness(Fuzziness.AUTO));
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
} catch (IOException e) {
log.error("", e);
}
return result;
}
}
查询岁数 ≥ 30 岁的员工数据:
GET /mydlq-user/_search{ "query": { "range": { "age": { "gte": 30 } } }}
查询生日距离现在 30 年间的员工数据:
GET mydlq-user/_search{ "query": { "range": { "birthDate": { "gte": "now-30y" } } }}
package club.mydlq.elasticsearch.service.query;
import club.mydlq.elasticsearch.model.entity.UserInfo;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
/**
* 范围查询
*/
@Slf4j
@Service
public class RangeQueryService {
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* 查询岁数 ≥ 30 岁的员工数据
*/
public Object rangeQuery() {
Object result = "";
try {
// 构建查询条件
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.rangeQuery("age").gte(30));
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
} catch (IOException e) {
log.error("", e);
}
return result;
}
/**
* 查询距离现在 30 年间的员工数据
* [年(y)、月(M)、星期(w)、天(d)、小时(h)、分钟(m)、秒(s)]
* 例如:
* now-1h 查询一小时内范围
* now-1d 查询一天内时间范围
* now-1y 查询最近一年内的时间范围
*/
public Object dateRangeQuery() {
Object result = "";
try {
// 构建查询条件
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
// includeLower(是否包含下边界)、includeUpper(是否包含上边界)
searchSourceBuilder.query(QueryBuilders.rangeQuery("birthDate")
.gte("now-30y").includeLower(true).includeUpper(true));
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
} catch (IOException e) {
log.error("", e);
}
return result;
}
}
查询所有以 “三” 结尾的姓名:
GET mydlq-user/_search{ "query": { "wildcard": { "name.keyword": { "value": "*三" } } }}
package club.mydlq.elasticsearch.service.query;
import club.mydlq.elasticsearch.model.entity.UserInfo;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
/**
* 通配符查询
*/
@Slf4j
@Service
public class WildcardQueryService {
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* 查询所有以 “三” 结尾的姓名
*
* *:表示多个字符(0个或多个字符)
* ?:表示单个字符
*/
public Object wildcardQuery() {
Object result = "";
try {
// 构建查询条件
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.wildcardQuery("name.keyword", "*三"));
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
} catch (IOException e) {
log.error("", e);
}
return result;
}
}
查询出生在 1990-1995 年期间,且地址在 北京市昌平区
、北京市大兴区
、北京市房山区
的员工信息:
- GET /mydlq-user/_search{ "query": { "bool": { "filter": {
"range": { "birthDate": { "format": "yyyy",
"gte": 1990, "lte": 1995 } } },
"must": [ { "terms": { "address.keyword":
[ "北京市昌平区", "北京市大兴区", "北京市房山区"
] } } ] } }}
package club.mydlq.elasticsearch.service.query;
import club.mydlq.elasticsearch.model.entity.UserInfo;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
/**
* 布尔查询
*/
@Slf4j
@Service
public class BoolQueryService {
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* 布尔查询
*/
public Object boolQuery() {
Object result = "";
try {
// 创建 Bool 查询构建器
BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
// 构建查询条件
boolQueryBuilder.must(QueryBuilders.termsQuery("address.keyword", "北京市昌平区", "北京市大兴区", "北京市房山区"))
.filter().add(QueryBuilders.rangeQuery("birthDate").format("yyyy").gte("1990").lte("1995"));
// 构建查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(boolQueryBuilder);
// 创建查询请求对象,将查询对象配置到其中
SearchRequest searchRequest = new SearchRequest("mydlq-user");
searchRequest.source(searchSourceBuilder);
// 执行查询,然后处理响应结果
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 根据状态和数据条数验证是否返回了数据
if (RestStatus.OK.equals(searchResponse.status()) && searchResponse.getHits().totalHits > 0) {
SearchHits hits = searchResponse.getHits();
for (SearchHit hit : hits) {
// 将 JSON 转换成对象
UserInfo userInfo = JSON.parseObject(hit.getSourceAsString(), UserInfo.class);
// 输出查询信息
log.info(userInfo.toString());
}
}
result = searchResponse.getHits();
}catch (IOException e){
log.error("",e);
}
return result;
}
}
统计员工总数、工资最高值、工资最低值、工资平均工资、工资总和:
GET /mydlq-user/_search{ "size": 0, "aggs": { "salary_stats": { "stats": { "field": "salary" } } }}
统计员工工资最低值:
GET /mydlq-user/_search{ "size": 0, "aggs": { "salary_min": { "min": { "field": "salary" } } }}
统计员工工资最高值:
GET /mydlq-user/_search{ "size": 0, "aggs": { "salary_max": { "max": { "field": "salary" } } }}
统计员工工资平均值:
GET /mydlq-user/_search{ "size": 0, "aggs": { "salary_avg": { "avg": { "field": "salary" } } }}
统计员工工资总值:
GET /mydlq-user/_search{ "size": 0, "aggs": { "salary_sum": { "sum": { "field": "salary" } } }}
统计员工总数:
GET /mydlq-user/_search{ "size": 0, "aggs": { "employee_count": { "value_count": { "field": "salary" } } }}
统计员工工资百分位:
GET /mydlq-user/_search{ "size": 0, "aggs": { "salary_percentiles": { "percentiles": { "field": "salary" } } }}
package club.mydlq.elasticsearch.service.aggregation;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.metrics.avg.ParsedAvg;
import org.elasticsearch.search.aggregations.metrics.max.ParsedMax;
import org.elasticsearch.search.aggregations.metrics.min.ParsedMin;
import org.elasticsearch.search.aggregations.metrics.percentiles.ParsedPercentiles;
import org.elasticsearch.search.aggregations.metrics.percentiles.Percentile;
import org.elasticsearch.search.aggregations.metrics.stats.ParsedStats;
import org.elasticsearch.search.aggregations.metrics.sum.ParsedSum;
import org.elasticsearch.search.aggregations.metrics.sum.SumAggregationBuilder;
import org.elasticsearch.search.aggregations.metrics.valuecount.ParsedValueCount;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
/**
* 聚合 Metric
*/
@Slf4j
@Service
public class AggrMetricService {
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* stats 统计员工总数、工资最高值、工资最低值、工资平均工资、工资总和
*/
public Object aggregationStats() {
String responseResult = "";
try {
// 设置聚合条件
AggregationBuilder aggr = AggregationBuilders.stats("salary_stats").field("salary");
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.aggregation(aggr);
// 设置查询结果不返回,只返回聚合结果
searchSourceBuilder.size(0);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status()) || aggregations != null) {
// 转换为 Stats 对象
ParsedStats aggregation = aggregations.get("salary_stats");
log.info("-------------------------------------------");
log.info("聚合信息:");
log.info("count:{}", aggregation.getCount());
log.info("avg:{}", aggregation.getAvg());
log.info("max:{}", aggregation.getMax());
log.info("min:{}", aggregation.getMin());
log.info("sum:{}", aggregation.getSum());
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
/**
* min 统计员工工资最低值
*/
public Object aggregationMin() {
String responseResult = "";
try {
// 设置聚合条件
AggregationBuilder aggr = AggregationBuilders.min("salary_min").field("salary");
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.aggregation(aggr);
searchSourceBuilder.size(0);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status()) || aggregations != null) {
// 转换为 Min 对象
ParsedMin aggregation = aggregations.get("salary_min");
log.info("-------------------------------------------");
log.info("聚合信息:");
log.info("min:{}", aggregation.getValue());
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
/**
* max 统计员工工资最高值
*/
public Object aggregationMax() {
String responseResult = "";
try {
// 设置聚合条件
AggregationBuilder aggr = AggregationBuilders.max("salary_max").field("salary");
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.aggregation(aggr);
searchSourceBuilder.size(0);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status()) || aggregations != null) {
// 转换为 Max 对象
ParsedMax aggregation = aggregations.get("salary_max");
log.info("-------------------------------------------");
log.info("聚合信息:");
log.info("max:{}", aggregation.getValue());
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
/**
* avg 统计员工工资平均值
*/
public Object aggregationAvg() {
String responseResult = "";
try {
// 设置聚合条件
AggregationBuilder aggr = AggregationBuilders.avg("salary_avg").field("salary");
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.aggregation(aggr);
searchSourceBuilder.size(0);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status()) || aggregations != null) {
// 转换为 Avg 对象
ParsedAvg aggregation = aggregations.get("salary_avg");
log.info("-------------------------------------------");
log.info("聚合信息:");
log.info("avg:{}", aggregation.getValue());
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
/**
* sum 统计员工工资总值
*/
public Object aggregationSum() {
String responseResult = "";
try {
// 设置聚合条件
SumAggregationBuilder aggr = AggregationBuilders.sum("salary_sum").field("salary");
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.aggregation(aggr);
searchSourceBuilder.size(0);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status()) || aggregations != null) {
// 转换为 Sum 对象
ParsedSum aggregation = aggregations.get("salary_sum");
log.info("-------------------------------------------");
log.info("聚合信息:");
log.info("sum:{}", String.valueOf((aggregation.getValue())));
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
/**
* count 统计员工总数
*/
public Object aggregationCount() {
String responseResult = "";
try {
// 设置聚合条件
AggregationBuilder aggr = AggregationBuilders.count("employee_count").field("salary");
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.aggregation(aggr);
searchSourceBuilder.size(0);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status()) || aggregations != null) {
// 转换为 ValueCount 对象
ParsedValueCount aggregation = aggregations.get("employee_count");
log.info("-------------------------------------------");
log.info("聚合信息:");
log.info("count:{}", aggregation.getValue());
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
/**
* percentiles 统计员工工资百分位
*/
public Object aggregationPercentiles() {
String responseResult = "";
try {
// 设置聚合条件
AggregationBuilder aggr = AggregationBuilders.percentiles("salary_percentiles").field("salary");
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.aggregation(aggr);
searchSourceBuilder.size(0);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status()) || aggregations != null) {
// 转换为 Percentiles 对象
ParsedPercentiles aggregation = aggregations.get("salary_percentiles");
log.info("-------------------------------------------");
log.info("聚合信息:");
for (Percentile percentile : aggregation) {
log.info("百分位:{}:{}", percentile.getPercent(), percentile.getValue());
}
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
}
按岁数进行聚合分桶,统计各个岁数员工的人数:
GET mydlq-user/_search{ "size": 0, "aggs": { "age_bucket": { "terms": { "field": "age", "size": "10" } } }}
按工资范围进行聚合分桶,统计工资在 3000-5000、5000-9000 和 9000 以上的员工信息:
GET mydlq-user/_search{ "aggs": { "salary_range_bucket": { "range": { "field": "salary", "ranges": [ { "key": "低级员工", "to": 3000 },{ "key": "中级员工", "from": 5000, "to": 9000 },{ "key": "高级员工", "from": 9000 } ] } } }}
按照时间范围进行分桶,统计 1985-1990 年和 1990-1995 年出生的员工信息:
GET mydlq-user/_search{ "size": 10, "aggs": { "date_range_bucket": { "date_range": { "field": "birthDate", "format": "yyyy", "ranges": [ { "key": "出生日期1985-1990的员工", "from": "1985", "to": "1990" },{ "key": "出生日期1990-1995的员工", "from": "1990", "to": "1995" } ] } } }}
按工资多少进行聚合分桶,设置统计的最小值为 0,最大值为 12000,区段间隔为 3000:
GET mydlq-user/_search{ "size": 0, "aggs": { "salary_histogram": { "histogram": { "field": "salary", "extended_bounds": { "min": 0, "max": 12000 }, "interval": 3000 } } }}
按出生日期进行分桶:
GET mydlq-user/_search{ "size": 0, "aggs": { "birthday_histogram": { "date_histogram": { "format": "yyyy", "field": "birthDate", "interval": "year" } } }}
package club.mydlq.elasticsearch.service.aggregation;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramInterval;
import org.elasticsearch.search.aggregations.bucket.histogram.Histogram;
import org.elasticsearch.search.aggregations.bucket.range.Range;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
import java.util.List;
/**
* 聚合 Bucket
*/
@Slf4j
@Service
public class AggrBucketService {
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* 按岁数进行聚合分桶
*/
public Object aggrBucketTerms() {
String responseResult = "";
try {
AggregationBuilder aggr = AggregationBuilders.terms("age_bucket").field("age");
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.size(10);
searchSourceBuilder.aggregation(aggr);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status())) {
// 分桶
Terms byCompanyAggregation = aggregations.get("age_bucket");
List<? extends Terms.Bucket> buckets = byCompanyAggregation.getBuckets();
// 输出各个桶的内容
log.info("-------------------------------------------");
log.info("聚合信息:");
for (Terms.Bucket bucket : buckets) {
log.info("桶名:{} | 总数:{}", bucket.getKeyAsString(), bucket.getDocCount());
}
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
/**
* 按工资范围进行聚合分桶
*/
public Object aggrBucketRange() {
String responseResult = "";
try {
AggregationBuilder aggr = AggregationBuilders.range("salary_range_bucket")
.field("salary")
.addUnboundedTo("低级员工", 3000)
.addRange("中级员工", 5000, 9000)
.addUnboundedFrom("高级员工", 9000);
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.size(0);
searchSourceBuilder.aggregation(aggr);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status())) {
// 分桶
Range byCompanyAggregation = aggregations.get("salary_range_bucket");
List<? extends Range.Bucket> buckets = byCompanyAggregation.getBuckets();
// 输出各个桶的内容
log.info("-------------------------------------------");
log.info("聚合信息:");
for (Range.Bucket bucket : buckets) {
log.info("桶名:{} | 总数:{}", bucket.getKeyAsString(), bucket.getDocCount());
}
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
/**
* 按照时间范围进行分桶
*/
public Object aggrBucketDateRange() {
String responseResult = "";
try {
AggregationBuilder aggr = AggregationBuilders.dateRange("date_range_bucket")
.field("birthDate")
.format("yyyy")
.addRange("出生日期1985-1990的员工", "1985", "1990")
.addRange("出生日期1990-1995的员工", "1990", "1995");
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.size(0);
searchSourceBuilder.aggregation(aggr);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status())) {
// 分桶
Range byCompanyAggregation = aggregations.get("date_range_bucket");
List<? extends Range.Bucket> buckets = byCompanyAggregation.getBuckets();
// 输出各个桶的内容
log.info("-------------------------------------------");
log.info("聚合信息:");
for (Range.Bucket bucket : buckets) {
log.info("桶名:{} | 总数:{}", bucket.getKeyAsString(), bucket.getDocCount());
}
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
/**
* 按工资多少进行聚合分桶
*/
public Object aggrBucketHistogram() {
String responseResult = "";
try {
AggregationBuilder aggr = AggregationBuilders.histogram("salary_histogram")
.field("salary")
.extendedBounds(0, 12000)
.interval(3000);
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.size(0);
searchSourceBuilder.aggregation(aggr);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status())) {
// 分桶
Histogram byCompanyAggregation = aggregations.get("salary_histogram");
List<? extends Histogram.Bucket> buckets = byCompanyAggregation.getBuckets();
// 输出各个桶的内容
log.info("-------------------------------------------");
log.info("聚合信息:");
for (Histogram.Bucket bucket : buckets) {
log.info("桶名:{} | 总数:{}", bucket.getKeyAsString(), bucket.getDocCount());
}
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
/**
* 按出生日期进行分桶
*/
public Object aggrBucketDateHistogram() {
String responseResult = "";
try {
AggregationBuilder aggr = AggregationBuilders.dateHistogram("birthday_histogram")
.field("birthDate")
.interval(1)
.dateHistogramInterval(DateHistogramInterval.YEAR)
.format("yyyy");
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.size(0);
searchSourceBuilder.aggregation(aggr);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status())) {
// 分桶
Histogram byCompanyAggregation = aggregations.get("birthday_histogram");
List<? extends Histogram.Bucket> buckets = byCompanyAggregation.getBuckets();
// 输出各个桶的内容
log.info("-------------------------------------------");
log.info("聚合信息:");
for (Histogram.Bucket bucket : buckets) {
log.info("桶名:{} | 总数:{}", bucket.getKeyAsString(), bucket.getDocCount());
}
log.info("-------------------------------------------");
}
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
}
按照员工岁数分桶、然后统计每个岁数员工工资最高值:
GET mydlq-user/_search{ "size": 0, "aggs": { "salary_bucket": { "terms": { "field": "age", "size": "10" }, "aggs": { "salary_max_user": { "top_hits": { "size": 1, "sort": [ { "salary": { "order": "desc" } } ] } } } } }}
package club.mydlq.elasticsearch.service.aggregation;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.aggregations.metrics.tophits.ParsedTopHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
import java.util.List;
/**
* 聚合 Bucket 与 Metric
*/
@Slf4j
@Service
public class AggrBucketMetricService {
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* topHits 按照员工岁数分桶、然后统计每个岁数员工工资最高值
*/
public Object aggregationTopHits() {
String responseResult = "";
try {
AggregationBuilder testTop = AggregationBuilders.topHits("salary_max_user")
.size(1)
.sort("salary", SortOrder.DESC);
AggregationBuilder salaryBucket = AggregationBuilders.terms("salary_bucket")
.field("age")
.size(10);
salaryBucket.subAggregation(testTop);
// 查询源构建器
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.size(0);
searchSourceBuilder.aggregation(salaryBucket);
// 创建查询请求对象,将查询条件配置到其中
SearchRequest request = new SearchRequest("mydlq-user");
request.source(searchSourceBuilder);
// 执行请求
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// 获取响应中的聚合信息
Aggregations aggregations = response.getAggregations();
// 输出内容
if (RestStatus.OK.equals(response.status())) {
// 分桶
Terms byCompanyAggregation = aggregations.get("salary_bucket");
List<? extends Terms.Bucket> buckets = byCompanyAggregation.getBuckets();
// 输出各个桶的内容
log.info("-------------------------------------------");
log.info("聚合信息:");
for (Terms.Bucket bucket : buckets) {
log.info("桶名:{}", bucket.getKeyAsString());
ParsedTopHits topHits = bucket.getAggregations().get("salary_max_user");
for (SearchHit hit:topHits.getHits()){
log.info(hit.getSourceAsString());
}
}
log.info("-------------------------------------------");
// 根据具体业务逻辑返回不同结果,这里为了方便直接将返回响应对象Json串
responseResult = response.toString();
}
} catch (IOException e) {
log.error("", e);
}
return responseResult;
}
}