java直接使用dsl语句查询ES

pom

<dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-elasticsearchartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.datagroupId>
            <artifactId>spring-data-elasticsearchartifactId>
        dependency>
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客户端配置

import lombok.Data;
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.config.AbstractElasticsearchConfiguration;



@Configuration
@Data
public class ElasticsearchConfig extends AbstractElasticsearchConfiguration {
    private String host="localhost";
    private Integer port=9200;
    @Override
    public RestHighLevelClient elasticsearchClient() {
        RestClientBuilder builder = RestClient.builder(new HttpHost(host,port));
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(builder);
        return restHighLevelClient;
    }
}
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dsl查询

import com.alibaba.fastjson.JSONObject;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.WrapperQueryBuilder;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;

@RestController
@RequestMapping("/es-client2")
public class EsClientController2 {
    @Autowired
    private RestHighLevelClient rstHighLevelClient;


    @PostMapping("/query2")
    public SearchResponse userEsClient(
            @RequestBody JSONObject body
    ) throws IOException {
        String index_name = body.getOrDefault("index_name", "").toString();
        System.out.println("body:" + body);

        String json = "{\"query\": {\"match\": {\"title\": \"hello world\"}}}";
        //language=JSON5
        String dsl = "{\n" +
                "  \"match_all\": {}\n" +
                "}";


        WrapperQueryBuilder queryBuilder = new WrapperQueryBuilder(dsl);
        SearchRequest searchRequest = new SearchRequest();
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        // 设置分页
        searchSourceBuilder.query(queryBuilder).from((int) 1).size((int) 10);
        searchRequest.source(searchSourceBuilder).indices(index_name);
        SearchResponse searchResp = rstHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
        // 计算返回的条数


        return searchResp;
    }

}
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结果