Elasticsearch导出导入数据

1.概念回顾

2.基础操作

展示详细信息

GET：http://127.0.0.1:9200/_cat/indices?v

Java代码将文件导入到ES

package com.Graph.medicalgraph;

import org.apache.http.HttpHost;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

//导入es
public class JSONDataImporter {

    public static void main(String[] args) {
        String jsonFilePath = "D:\\xx.json";
        String indexName = "test01";

        try (RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http")))) {

            BulkRequest bulkRequest = new BulkRequest();

            BufferedReader reader = new BufferedReader(new FileReader(jsonFilePath));
            String line;
            int id = 0;

            while ((line = reader.readLine()) != null) {
                IndexRequest indexRequest = new IndexRequest(indexName);
                indexRequest.source(line, XContentType.JSON);
                indexRequest.id(Integer.toString(id++)); // 使用递增ID
                bulkRequest.add(indexRequest);
            }

            BulkResponse bulkResponse = client.bulk(bulkRequest, RequestOptions.DEFAULT);

            if (bulkResponse.hasFailures()) {
                System.out.println("Some documents failed to import.");
            } else {
                System.out.println("All documents imported successfully.");
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

全查询：http://127.0.0.1:9200/indexName_test01/_search