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  • es索引的RestHighLevelClient实现

    java代码:

    import java.io.IOException;
    
    import org.apache.http.HttpHost;
    import org.elasticsearch.action.search.SearchRequest;
    import org.elasticsearch.action.search.SearchResponse;
    import org.elasticsearch.client.RestClient;
    import org.elasticsearch.client.RestHighLevelClient;
    import org.elasticsearch.search.SearchHit;
    import org.elasticsearch.search.SearchHits;
    import org.elasticsearch.search.builder.SearchSourceBuilder;
    
    public class App3 {
        public static void main(String[] args) throws IOException {
             RestHighLevelClient client = new RestHighLevelClient(
                        RestClient.builder(
                                new HttpHost("localhost", 9200, "http")));
    /*         Long start=System.currentTimeMillis();
             IndicesClient indicesClient=client.indices();
             DeleteIndexRequest deleteIndexRequest=new DeleteIndexRequest("person");
             DeleteIndexResponse delRes=indicesClient.deleteIndex(deleteIndexRequest);
             if(delRes.isAcknowledged()) {
                 System.out.println("delete success");
             }else{
                 System.out.println("delete failed");
             }
             System.out.println("耗时:"+(System.currentTimeMillis()-start)+" 毫秒");*/
             SearchRequest req=new SearchRequest("person");
             SearchSourceBuilder builder=new SearchSourceBuilder();
             builder.size(10);
             req.source(builder);
             SearchResponse res=client.search(req);
             SearchHits hits=res.getHits();
             SearchHit[] hitArr=hits.getHits();
             for(SearchHit hit:hitArr) {
                 System.out.println(hit.getSourceAsString());
             }
            /**** Done ****/
            System.out.println("Done");
    
        }
        
    }

    无用的import自动删除快捷键

    导入需要的包快捷键 shift+ctrl+o,自动导入包,当然也会清除掉多余的包。

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  • 原文地址:https://www.cnblogs.com/davidwang456/p/9915791.html
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