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update at 2021-03-07 17:31:22 by ehlxr

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ehlxr 2021-03-07 17:31:22 +08:00
commit 510e085195
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.gitignore vendored Normal file
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HELP.md
target/
!.mvn/wrapper/maven-wrapper.jar
!**/src/main/**/target/
!**/src/test/**/target/
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
build/
!**/src/main/**/build/
!**/src/test/**/build/
### VS Code ###
.vscode/

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pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<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>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>io.github.ehlxr</groupId>
<artifactId>springboot-es</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot-es</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<!-- 修改 es 版本 -->
<elasticsearch.version>7.10.2</elasticsearch.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>

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src/main/java/io/github/ehlxr/es/SpringbootEsApplication.java Normal file
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package io.github.ehlxr.es;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringbootEsApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootEsApplication.class, args);
}
}

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src/main/resources/application.yml Normal file
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server:
port: 8899
spring:
elasticsearch:
rest:
uris: http://127.0.0.1:9200

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src/test/java/io/github/ehlxr/es/SpringbootEsApplicationTests.java Normal file
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package io.github.ehlxr.es;
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.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
import org.elasticsearch.search.aggregations.metrics.Avg;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import java.io.IOException;
@SpringBootTest
class SpringbootEsApplicationTests {
@Autowired
private RestHighLevelClient restHighLevelClient;
@Test
void searchData() throws IOException {
/*
* GET bank/_search
* {
* "query": {
* "match_all": {}
* },
* "aggs": {
* "ageAgg": {
* "terms": {
* "field": "age",
* "size": 100
* },
* "aggs": {
* "genderAgg": {
* "terms": {
* "field": "gender.keyword",
* "size": 10
* },
* "aggs": {
* "balanceAvg": {
* "avg": {
* "field": "balance"
* }
* }
* }
* },
* "balanceAvg":{
* "avg": {
* "field": "balance"
* }
* }
* }
* }
* },
* "size": 0
*
* }
*/
TermsAggregationBuilder ageAgg = AggregationBuilders.terms("ageAgg");
ageAgg.field("age").size(100);
ageAgg.subAggregation(AggregationBuilders.avg("balanceAvg").field("balance"));
TermsAggregationBuilder genderAgg = AggregationBuilders.terms("genderAgg").field("gender.keyword");
genderAgg.subAggregation(AggregationBuilders.avg("ageBalanceAvg").field("balance"));
ageAgg.subAggregation(genderAgg);
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.query(QueryBuilders.matchAllQuery());
sourceBuilder.aggregation(ageAgg);
sourceBuilder.size(0);
SearchRequest request = new SearchRequest("bank");
request.source(sourceBuilder);
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
// System.out.println(response);
Aggregations aggregations = response.getAggregations();
Terms ageAggTerms = aggregations.get("ageAgg");
ageAggTerms.getBuckets().forEach(ageAggBucket -> {
Avg balanceAvg = ageAggBucket.getAggregations().get("balanceAvg");
System.out.println("年龄为 " + ageAggBucket.getKeyAsString() + " 的人数 " + ageAggBucket.getDocCount() + " 平均工资为 " + balanceAvg.getValue());
Terms genderAggTerms = ageAggBucket.getAggregations().get("genderAgg");
genderAggTerms.getBuckets().forEach(genderAggBucket -> {
Avg ageBalanceAvg = genderAggBucket.getAggregations().get("ageBalanceAvg");
System.out.println(" 其中性别为 " + genderAggBucket.getKeyAsString() + " 的人数为 " + genderAggBucket.getDocCount() + " 平均工资为 " + ageBalanceAvg.getValue());
});
});
}
}