使用Java API根据条件更新ElasticSearch文档

import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;

import java.io.IOException;

public class ElasticSearchUpdateExample {
    public static void main(String[] args) {
        // 创建Elasticsearch客户端连接
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder("localhost:9200"));

        // 构建更新请求
        UpdateRequest request = new UpdateRequest("index_name", "document_type", "document_id");

        // 设置更新内容
        String jsonString = "{\"field1\":\"value1\",\"field2\":\"value2\"}";
        request.doc(jsonString, XContentType.JSON);

        // 设置更新条件
        String script = "ctx._source.field3 = 'new_value'";
        request.script(script);

        try {
            // 执行更新请求
            UpdateResponse response = client.update(request, RequestOptions.DEFAULT);
            System.out.println("Update response: " + response);
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 关闭Elasticsearch客户端连接
        try {
            client.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}