Es批量删除DeleteByQueryRequestBuilder

在Elasticsearch中，使用DeleteByQueryRequestBuilder可以根据指定的查询条件来批量删除文档。以下是一个使用Java High Level REST Client的例子，演示如何使用DeleteByQueryRequestBuilder来批量删除满足特定查询条件的文档。

import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.reindex.DeleteByQueryRequest;
import org.elasticsearch.index.reindex.DeleteByQueryResponse;
import java.io.IOException;
 
public class DeleteByQueryExample {
    public static void main(String[] args) throws IOException {
        // 初始化Elasticsearch客户端
        try (RestHighLevelClient client = new RestHighLevelClient(...)) {
            // 创建DeleteByQueryRequestBuilder
            DeleteByQueryRequest request = new DeleteByQueryRequest("index_name"); // 替换为你的索引名
 
            // 设置查询条件
            request.setQuery(QueryBuilders.matchQuery("field_name", "value")); // 替换为你的字段名和值
 
            // 执行批量删除
            DeleteByQueryRequestBuilder deleteRequestBuilder = new DeleteByQueryRequestBuilder(client, DeleteByQueryAction.INSTANCE, request);
            DeleteByQueryResponse response = deleteRequestBuilder.get();
 
            // 打印结果
            long deleted = response.getDeleted();
            System.out.println("Batch delete operation completed. " + deleted + " documents deleted.");
        }
    }
}

确保替换index_name为你的目标索引名，以及根据需要替换查询条件。这段代码使用了DeleteByQueryRequestBuilder来构建和执行批量删除操作，并打印了删除的文档数量。