1.编辑pom.xml
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>5.6.3</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.9.1</version>
</dependency>
2.添加log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="warn">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%m%n" />
</Console>
</Appenders>
<Loggers>
<Root level="INFO">
<AppenderRef ref="Console" />
</Root>
</Loggers>
</Configuration>
3.测试代码
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(new HttpHost("127.0.0.1", 9200, "http")).build());
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.matchAllQuery());
searchSourceBuilder.aggregation(AggregationBuilders.terms("top_10_states").field("state").size(10));
SearchRequest searchRequest = new SearchRequest();
searchRequest.indices("social-*");
searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = client.search(searchRequest);
System.out.println(searchResponse.getHits());
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