ESTest_Doc_Insert-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_39368007/article/details/116277649

这篇博客展示了如何在Java环境中通过RestHighLevelClient连接Elasticsearch，并进行数据插入操作。示例代码创建了一个HTTP客户端，构造了IndexRequest，序列化了一个User对象为JSON，然后将其插入到名为'user'的索引中。

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package com.dym.es.test;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.http.HttpHost;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.GetIndexRequest;
import org.elasticsearch.client.indices.GetIndexResponse;
import org.elasticsearch.common.xcontent.XContentType;

public class ESTest_Doc_Insert {
    public static void main(String[] args) throws Exception {

        RestHighLevelClient esClient = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );

        // 插入数据
        IndexRequest request = new IndexRequest();
        request.index("user").id("1001");

        User user = new User();
        user.setName("zhangsan");
        user.setAge(30);
        user.setSex("男");

        // 向ES插入数据，必须将数据转换位JSON格式
        ObjectMapper mapper = new ObjectMapper();
        String userJson = mapper.writeValueAsString(user);
        request.source(userJson, XContentType.JSON);

        IndexResponse response = esClient.index(request, RequestOptions.DEFAULT);

        System.out.println(response.getResult());

        esClient.close();
    }
}