Spring-Data-Elasticsearch@4.3.1 集成Spring-Boot 使用NativeSearchQueryBuilder构建查询语句查询

最近有个需求，项目从之前的Spring-Data-Jest换成Spirng-Data-Elasticsearch,Client也换成了最新的7.16.2，这边query这边就需要微改一下。记录下

一开始想用Entity repository的方式，但是发现太麻烦了，需要建立过多的实体，而且query语句也需要大改，后面查看官方文档，看到了使用 org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate的查询方式。

https://docs.spring.io/spring-data/elasticsearch/docs/current/reference/html/#elasticsearch.misc.filter 

    org.springframework.boot
    spring-boot-starter-data-elasticsearch

这边我是用的是jhipster生成的，所以直接贴出来默认的configuration

package com.damien.test.generated.config;

import java.time.Instant;
import java.time.LocalDate;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.Arrays;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.convert.converter.Converter;
import org.springframework.data.convert.ReadingConverter;
import org.springframework.data.convert.WritingConverter;
import org.springframework.data.elasticsearch.config.ElasticsearchConfigurationSupport;
import org.springframework.data.elasticsearch.core.convert.ElasticsearchCustomConversions;

@Configuration
public class ElasticsearchConfiguration extends ElasticsearchConfigurationSupport {

    @Bean
    @Override
    public ElasticsearchCustomConversions elasticsearchCustomConversions() {
        return new ElasticsearchCustomConversions(
            Arrays.asList(
                new ZonedDateTimeWritingConverter(),
                new ZonedDateTimeReadingConverter(),
                new InstantWritingConverter(),
                new InstantReadingConverter(),
                new LocalDateWritingConverter(),
                new LocalDateReadingConverter()
            )
        );
    }

    @WritingConverter
    static class ZonedDateTimeWritingConverter implements Converter {

        @Override
        public String convert(ZonedDateTime source) {
            if (source == null) {
                return null;
            }
            return source.toInstant().toString();
        }
    }

    @ReadingConverter
    static class ZonedDateTimeReadingConverter implements Converter {

        @Override
        public ZonedDateTime convert(String source) {
            if (source == null) {
                return null;
            }
            return Instant.parse(source).atZone(ZoneId.systemDefault());
        }
    }

    @WritingConverter
    static class InstantWritingConverter implements Converter {

        @Override
        public String convert(Instant source) {
            if (source == null) {
                return null;
            }
            return source.toString();
        }
    }

    @ReadingConverter
    static class InstantReadingConverter implements Converter {

        @Override
        public Instant convert(String source) {
            if (source == null) {
                return null;
            }
            return Instant.parse(source);
        }
    }

    @WritingConverter
    static class LocalDateWritingConverter implements Converter {

        @Override
        public String convert(LocalDate source) {
            if (source == null) {
                return null;
            }
            return source.toString();
        }
    }

    @ReadingConverter
    static class LocalDateReadingConverter implements Converter {

        @Override
        public LocalDate convert(String source) {
            if (source == null) {
                return null;
            }
            return LocalDate.parse(source);
        }
    }
}

spring：
    elasticsearch：
        rest：
            uris：http://localhost:9200

//import org.springframework.data.domain.Pageable;
//import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
//import org.springframework.data.elasticsearch.core.SearchHit;
//import org.springframework.data.elasticsearch.core.SearchHits;
//import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
//import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
//import org.springframework.data.elasticsearch.core.query.Query;
//import org.elasticsearch.index.query.TermQueryBuilder;
IndexCoordinates index = IndexCoordinates.of("some_index");

Query query  = new NativeSearchQueryBuilder()
        .withPageable(Pageable.unpaged())
        .withFilter(new TermQueryBuilder("column.keyword", "xxxxx"))
        .build();

SearchHits hit=template.search(query, HashMap.class, index);
for (SearchHit result : hit.getSearchHits()) {
    String somePropertie=(String)result.getContent().get("somePropertie");
     //.....
}

这样就可以构建NativeSearchQuery进行查询了。

当然你要使用repository的方式建立实体可以。 

就类似于JPA的查询方式，建立实体，通过repository进行查询就可以了，就不多赘述了。