社区: 最近，当我在使用 Elasticsearch[2.3.1] 的项目中工作时，我尝试使用添加到项目中的 .jar(elasticsearch.2.3.1.jar) 文件中的 java API 编译对 ES 进行简单查询，但是当我接下来编码时:
QueryBuilder qb = simpleQueryStringQuery("+kimchy -elasticsearch");
IDE 没有识别指令“simpleQueryStringQuery("+kimchy -elasticsearch")”，但在互联网和 ES 官方网站的所有示例中都以这种形式出现。做错了什么？提前致谢。
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.sort.SortOrder;
import org.elasticsearch.search.sort.SortParseElement;
public class Search {
public static void main(String[] args) {
Client client;
Settings settings = Settings.settingsBuilder()
.put("client.transport.ignore_cluster_name", true).build();
try {
client = TransportClient
.builder()
.settings(settings)
.build()
.addTransportAddress(
new InetSocketTransportAddress(InetAddress
.getByName("localhost"), 9300));
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
QueryBuilder qb = simpleQueryStringQuery("+kimchy -elasticsearch");
SearchResponse scrollResp = client.prepareSearch("thing")
.addSort(SortParseElement.DOC_FIELD_NAME, SortOrder.ASC)
.setScroll(new TimeValue(60000))
.setQuery(qb)
.setSize(100).execute().actionGet(); //100 hits per shard will be returned for each scroll
//Scroll until no hits are returned
while (true) {
for (SearchHit hit : scrollResp.getHits().getHits()) {
//Handle the hit...
}
scrollResp = client.prepareSearchScroll(scrollResp.getScrollId()).setScroll(new TimeValue(60000)).execute().actionGet();
//Break condition: No hits are returned
if (scrollResp.getHits().getHits().length == 0) {
break;
}
}
}
}
最佳答案
你知道方法和导入是如何工作的吗？出现错误的原因是您的类没有名为 simpleQueryStringQuery 的方法，并且您没有导入该方法。
你真正想要的是:要么使用QueryBuilders.simpleQueryStringQuery("...")
或者对 QueryBuilders.simpleQueryStringQuery 使用静态导入。请参阅:http://docs.oracle.com/javase/1.5.0/docs/guide/language/static-import.html或https://en.wikipedia.org/wiki/Static_import
关于java - Elasticsearch Java API 2.3 问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37601657/