ES-JAVA应用基础操作篇

上文已经教了大家最基本的操作了,那我们在java代码里面要如何实现呢?本文的目的就是教大家在springboot框架下实现上文的API操作,也就是CURD!

环境准备

首先我们要知道ES的API都是HTTP请求!!!!,所以什么语言都可以操作,就是发送请求和处理返回而已嘛,只是说现在这种封装不需要我们做,有人做好了,这种叫做ES的客户端!

依赖配置

我们直接采用Spring-data-es的依赖,先看一下版本依赖说明:

这里建议客户端版本和你自身搭建的es版本保持一致(es不同版本间api差异很大,如果不想出现莫名其妙的错的最好一致),所以这里我们选择springboot 2.3版本,这里给出spring-data-es的官方文档open in new window

# springboot版本
<parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.3.2.RELEASE</version>
  <relativePath/> <!-- lookup parent from repository -->
</parent>

# spring-elasticsearch依赖
<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-elasticsearch</artifactId>
    <version>4.0.9.RELEASE</version>
</dependency>

因为我这ES是7.6的,所以选择使用HighLevelRestClient客户端,虽然这个已经在高版本过时了(8.x),但是在7.x版本里面官方建议使用这个

项目引入依赖后,使用非常简单,文件中配置一下ES地址,就可以愉快的访问啦:

# yml配置文件
spring:
  elasticsearch:
    rest:
      uris: ip:port
      username: 
      password: 

实体类准备

@Data
@Document(indexName = "es_apply_test")
public class EsTest {
    @Id
    private Long id;
    @Field(type = FieldType.Text,analyzer = "ik_max_word")
    private String name;

    @Field(type = FieldType.Keyword)
    private String sex;

    @Field(type = FieldType.Integer)
    private Integer age;

    @Field(type = FieldType.Text,analyzer = "ik_max_word")
    private String remark;

    @Field(type = FieldType.Keyword)
    private String[] tag;

    @Field(type = FieldType.Text,analyzer = "ik_max_word")
    private String addressLocation;

    @Field(type = FieldType.Keyword)
    private String birthAddress;

    @Field(type = FieldType.Date,pattern = "yyyy-MM-dd HH:mm:ss",format = DateFormat.custom)
    private Date createTime;

    @Field(type = FieldType.Boolean)
    private Boolean hasGirlFriend;
    
    public EsTest(){}
    
    

    // 下面都是为了生成测试数据而准备的
    private final static String[] city=new String[]{"深圳","广州","上海","北京","武汉"};
    private final static String[] address=new String[]{"北京市朝阳区北辰东路15号","上海市黄浦区人民大道200号","深圳市福田区福中三路市民中心C区","武汉市江岸区一元街道沿江大道188号","广州市花都区新华街新都大道68号"};

    public static EsTest getRandomData(Long id){
        EsTest esTest = new EsTest();
        esTest.setId(id);
        esTest.setName(RandomUtil.randomString("张三李四王五陈六江文档词测试",3));
        esTest.setSex(id%2==0 ? "男":"女");
        esTest.setAge(RandomUtil.randomInt(15,30));
        esTest.setRemark(RandomUtil.randomString("活波开朗,具有进取精神和团队精神,有较强的动手能力。良好协调沟通能力,适应力强,反应快、积极、细心、灵活, 具有一定的社会交往能力",15));
        esTest.setTag(new String[]{RandomUtil.randomString("活波开朗,具有进取精神和团队精神,有较强的动手能力。良好协调沟通能力,适应力强,反应快、积极、细心、灵活, 具有一定的社会交往能力",3),
                RandomUtil.randomString("活波开朗,具有进取精神和团队精神,有较强的动手能力。良好协调沟通能力,适应力强,反应快、积极、细心、灵活, 具有一定的社会交往能力",3),
                RandomUtil.randomString("活波开朗,具有进取精神和团队精神,有较强的动手能力。良好协调沟通能力,适应力强,反应快、积极、细心、灵活, 具有一定的社会交往能力",3)});
        esTest.setAddressLocation(address[RandomUtil.randomInt(0,address.length-1)]);
        esTest.setBirthAddress(city[RandomUtil.randomInt(0,city.length-1)]);
        esTest.setCreateTime(RandomUtil.randomDay(0,100));
        esTest.setHasGirlFriend(id%4==0 ? true:false);
        return esTest;
    }

}
  • 注解:@Document用来声明Java对象与ElasticSearch索引的关系

    indexName 索引名称

    type 索引类型

    shards 主分区数量

    replicas 副本分区数量

    createIndex 索引不存在时,是否自动创建索引,默认true

    不建议自动创建索引(自动创建的索引 是按着默认类型和默认分词器)

  • 注解:@Id 表示索引的主键

  • 注解:@Field 用来描述字段的ES数据类型,是否分词等配置,等于Mapping描述

    index 设置字段是否索引,默认是true,如果是false则该字段不能被查询

    store 默认为no,被store标记的fields被存储在和index不同的fragment中,以便于快速检索。虽然store占用磁盘空间,但是减少了计算。

    type 数据类型(text、keyword、date、object、geo等)

    analyzer 对字段使用分词器,注意一般如果要使用分词器,字段的type一般是text。

    format 定义日期时间格式,详细见 官方文档: https://www.elastic.co/guide/reference/mapping/date-format/open in new window.

  • 注解:@CompletionField 定义关键词索引 要完成补全搜索

    analyzer 对字段使用分词器,注意一般如果要使用分词器,字段的type一般是text。

    searchAnalyzer 显示指定搜索时分词器,默认是和索引是同一个,保证分词的一致性。

    maxInputLength:设置单个输入的长度,默认为50 UTF-16 代码点

使用说明

我们引入依赖后,在使用的时候有四种使用方式(下面我由简→难说明一下):

  • ElasticsearchRepository:自动生成简单CURD方法,直接调用即可(复杂的不友好)
  • ElasticsearchRestTemplate:内部使用的是RestHighLevelClient,它帮我们封装了一层
  • RestHighLevelClient:直接使用客户端
  • 自己封装客户端:之前说了本质就是HTTP请求,自己封装一下,直接调API呗,这比啥都好使

本文使用ElasticsearchRestTemplate(对小白友好),但是我个人强烈推荐直接用RestHighLevelClient,因为这个支持得更全面还同时支持同步和异步操作,本文有些操作也会用到这个

本文索引名称:es_apply_test

客户端注入:

索引/映射操作

创建索引和映射

@Test
void createIndexAndMapping() {
    IndexOperations indexOperations = elasticsearchRestTemplate.indexOps(EsTest.class);
    // 判断索引是否已经存在
    if(!indexOperations.exists()){
        // 不存在则创建
        indexOperations.create();
        Document mapping = indexOperations.createMapping(EsTest.class);
        indexOperations.putMapping(mapping);
    }
    log.info("使用API查询查看..................");
}

索引和映射相关查询

@Test
void queryIndexAndMapping() {
    IndexOperations indexOperations = elasticsearchRestTemplate.indexOps(EsTest.class);
    boolean exists = indexOperations.exists();
    log.info("索引是否存在:{}",exists);

    Map<String, Object> mapping = indexOperations.getMapping();
    log.info("映射:{}",JSONObject.toJSONString(mapping));

    Map<String, Object> settings = indexOperations.getSettings();
    log.info("索引设置:{}",JSONObject.toJSONString(settings));

    // 索引刷新(这个功能用处,后面讲理论的时候你会知道是干嘛的)
    indexOperations.refresh();
}

删除索引

@Test
void deletedIndex() {
    IndexOperations indexOperations = elasticsearchRestTemplate.indexOps(EsTest.class);
    indexOperations.delete();
}

文档操作

插入数据

/** 插入一条数据 */
    @Test
    void insertDoc() {
        // 插入一条
        elasticsearchRestTemplate.save(EsTest.getRandomData(1L));
        // 同时插入多条 实际是遍历一条一条插入而不是用的bulk命令
        elasticsearchRestTemplate.save(EsTest.getRandomData(2L),EsTest.getRandomData(3L));
    }

更新数据

    /** 更新数据 */
    @Test
    void updateDoc() throws IOException {
        // es的数据结构都是文档,其实不存在文档更新,每次更新都会产生新的文档(这个是很低效的),所以es在API方面也看的出来对更新不是很友好
        // 没办法,虽然更新很低效,但终究得改呀
        // 下面提供几种方式

        // 1.根据ID更新
        UpdateQuery build = UpdateQuery.builder("1").withDocument(Document.parse("{ \"name\": \"根据ID更新\" }")).build();
        elasticsearchRestTemplate.update(build,elasticsearchRestTemplate.getIndexCoordinatesFor(EsTest.class));


        // 2.条件更新
        // 采用highLevel客户端,根据查询条件 使用脚本更新 等同于_update_by_query API
        UpdateByQueryRequest request = new UpdateByQueryRequest("es_apply_test");
        request.setQuery(QueryBuilders.termQuery("age","24"));
        request.setScript(new Script("ctx._source['age']='300';ctx._source['remark']='根据条件批量更新';"));
        restHighLevelClient.updateByQuery(request, RequestOptions.DEFAULT);
    }

删除数据

    /** 删除数据 */
    @Test
    void deleteDoc() throws IOException {
        // 1.根据ID删除
        elasticsearchRestTemplate.delete("1",EsTest.class);

        // 2.条件删除
        NativeSearchQuery build = new NativeSearchQueryBuilder().withQuery(QueryBuilders.termQuery("id", "3")).build();
        elasticsearchRestTemplate.delete(build,EsTest.class,elasticsearchRestTemplate.getIndexCoordinatesFor(EsTest.class));
    }

批量操作

    /** 批量增、删、改操作 */
    @Test
    void bulkDoc() throws IOException {
        // 量大的话强烈推荐这种方式,因为ES本身是以查询突出,修改的吞吐量并不高
        // 1. 批量插入
        BulkRequest insertRequest = new BulkRequest();
        for(int i=1;i<=20;i++){
            IndexRequest indexRequest = new IndexRequest("es_apply_test");
            indexRequest.id(String.valueOf(i));
            indexRequest.source(JSONObject.toJSONString(EsTest.getRandomData((long)i)),XContentType.JSON);
            insertRequest.add(indexRequest);
        }
        BulkResponse insertResult = restHighLevelClient.bulk(insertRequest, RequestOptions.DEFAULT);
        log.info("是否失败: {},失败原因:{}",insertResult.hasFailures(),insertResult.buildFailureMessage());

        // 2. 批量更新
        BulkRequest updateRequest = new BulkRequest();
        for(int i=1;i<=5;i++){
            UpdateRequest indexRequest = new UpdateRequest();
            indexRequest.id(String.valueOf(i));
            indexRequest.index("es_apply_test");
            HashMap<String, Object> objectObjectHashMap = new HashMap<>();
            objectObjectHashMap.put("name","bulk批量更新");
            indexRequest.doc(objectObjectHashMap);
            updateRequest.add(indexRequest);
        }
        BulkResponse updateResult = restHighLevelClient.bulk(updateRequest, RequestOptions.DEFAULT);
        log.info("是否失败: {},失败原因:{}",updateResult.hasFailures(),updateResult.buildFailureMessage());

        // 3. 批量删除
        BulkRequest deleteRequest = new BulkRequest();
        for(int i=1;i<=5;i++){
            DeleteRequest request = new DeleteRequest();
            request.id(String.valueOf(i));
            request.index("es_apply_test");
            updateRequest.add(request);
        }
        BulkResponse deleteResult = restHighLevelClient.bulk(deleteRequest, RequestOptions.DEFAULT);
        log.info("是否失败: {},失败原因:{}",deleteResult.hasFailures(),deleteResult.buildFailureMessage());

        // 当然也可混合操作 就是 _bulk API
    }

文档查询

根据ID查询

    /** 根据id查 */
    @Test
    void getDataById() {
        EsTest esTest = elasticsearchRestTemplate.get("1", EsTest.class);
        log.info("结果:{}", JSONObject.toJSONString(esTest));
    }

根据字段精准查询

    @Test
    void termQuery() {
        // term 精准查询
        TermQueryBuilder termQuery = QueryBuilders.termQuery("age", 10);
        NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(termQuery);
        SearchHits<EsTest> termResult = elasticsearchRestTemplate.search(nativeSearchQuery, EsTest.class);
        log.info("term-> 总数量:{} 结果:{}", termResult.getTotalHits(),JSONObject.toJSONString(termResult.getSearchHits()));

        // terms 精准查询
        TermsQueryBuilder termsQueryBuilder = QueryBuilders.termsQuery("tag", "良心力", "高于动");
        NativeSearchQuery nativeSearchQuery1 = new NativeSearchQuery(termsQueryBuilder);
        SearchHits<EsTest> termsResult = elasticsearchRestTemplate.search(nativeSearchQuery1, EsTest.class);
        log.info("terms-> 总数量:{} 结果:{}", termsResult.getTotalHits(),JSONObject.toJSONString(termsResult.getSearchHits()));
    }

根据字段分词查询

    /** 根据字段分词查询 */
    @Test
    void matchQuery() {
        // matchall 全量查询 默认是分页查询10条
        MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();
        NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(matchAllQueryBuilder);
        SearchHits<EsTest> matchAll = elasticsearchRestTemplate.search(nativeSearchQuery, EsTest.class);
        log.info("match all-> 总数量:{} 结果:{}", matchAll.getTotalHits(),JSONObject.toJSONString(matchAll.getSearchHits()));

        // match 根据字段分词查询(字段分词)
        MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("addressLocation", "街道");
        NativeSearchQuery nativeSearchQuery1 = new NativeSearchQuery(matchQueryBuilder);
        SearchHits<EsTest> match = elasticsearchRestTemplate.search(nativeSearchQuery1, EsTest.class);
        log.info("match -> 总数量:{} 结果:{}", match.getTotalHits(),JSONObject.toJSONString(match.getSearchHits()));

        // match_phrase 根据字段分词查询(字段不分词)
        MatchPhraseQueryBuilder matchPhraseQueryBuilder = QueryBuilders.matchPhraseQuery("addressLocation", "街道,武汉");
        NativeSearchQuery nativeSearchQuery2 = new NativeSearchQuery(matchPhraseQueryBuilder);
        SearchHits<EsTest> matchPhrase = elasticsearchRestTemplate.search(nativeSearchQuery2, EsTest.class);
        log.info("match_phrase -> 总数量:{} 结果:{}", matchPhrase.getTotalHits(),JSONObject.toJSONString(matchPhrase.getSearchHits()));

        // multi_match 根据字段分词查询多个字段
        MultiMatchQueryBuilder multiMatchQueryBuilder = QueryBuilders.multiMatchQuery("街道,武汉,队协", "addressLocation", "remark");
        NativeSearchQuery nativeSearchQuery3 = new NativeSearchQuery(multiMatchQueryBuilder);
        SearchHits<EsTest> multiMatch = elasticsearchRestTemplate.search(nativeSearchQuery3, EsTest.class);
        log.info("multiMatch -> 总数量:{} 结果:{}", multiMatch.getTotalHits(),JSONObject.toJSONString(multiMatch.getSearchHits()));
    }

控制返回字段

    /** 控制返回字段 */
    @Test
    void fieldFilterQuery() {
        // matchall 全量查询 并控制返回字段
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.matchAllQuery())
                .withFields("id", "name")
                .build();
        SearchHits<EsTest> matchAll = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("match all-> 总数量:{} 结果:{}", matchAll.getTotalHits(),JSONObject.toJSONString(matchAll.getSearchHits()));
    }

范围查询

    /** 范围查询 */
    @Test
    void rangeQuery() {
        // 范围查询 并控制返回字段
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.rangeQuery("age").gte(20).lte(30))
                .withFields("id", "name","age")
                .build();
        SearchHits<EsTest> matchAll = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("match all-> 总数量:{} 结果:{}", matchAll.getTotalHits(),JSONObject.toJSONString(matchAll.getSearchHits()));
    }

组合查询

    /** 组合查询 and 、or 、!= */
    @Test
    void boolGroupQuery() {
        // 范围查询 并控制返回字段
        // =10岁 !=男
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.boolQuery().must(QueryBuilders.termQuery("age",23)).mustNot(QueryBuilders.termQuery("sex","男")))
                .withFields("id", "name","age","sex")
                .build();
        SearchHits<EsTest> matchAll = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("match all-> 总数量:{} 结果:{}", matchAll.getTotalHits(),JSONObject.toJSONString(matchAll.getSearchHits()));
    }

排序+分页

    /** 排序+分页 */
    @Test
    void sortAndPageQuery() {
        // 排序+分页  排序可以多个
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.matchAllQuery())
                .withSort(SortBuilders.fieldSort("age").order(SortOrder.ASC))
                .withSort(SortBuilders.fieldSort("id").order(SortOrder.DESC))
                .withSort(SortBuilders.scoreSort())
                .withFields("id", "name","age","sex")
                .withPageable(PageRequest.of(0,5))
                .build();
        SearchHits<EsTest> matchAll = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("match all-> 总数量:{} 结果:{}", matchAll.getTotalHits(),JSONObject.toJSONString(matchAll.getSearchHits()));
    }

高亮搜索

    /** 高亮搜索 */
    @Test
    void highlightQuery() {
        // 高亮搜索
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.multiMatchQuery("武汉深圳", "addressLocation", "remark"))
                .withFields("id", "name","addressLocation","remark")
                .withHighlightBuilder(new HighlightBuilder().preTags("<span style='color:red'>").postTags("</span>"))
                .withHighlightFields(new HighlightBuilder.Field("addressLocation"),new HighlightBuilder.Field("remark"))
                .build();
        SearchHits<EsTest> matchAll = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("match all-> 总数量:{} 结果:{}", matchAll.getTotalHits(),JSONObject.toJSONString(matchAll.getSearchHits()));
    }

聚合查询

    /** 聚合查询 */
    @Test
    void aggregateQuery() {
        // 不分组 聚合查询
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .addAggregation(AggregationBuilders.avg("ageAvg").field("age"))
                .addAggregation(AggregationBuilders.sum("ageSum").field("age"))
                .addAggregation(AggregationBuilders.max("ageMax").field("age"))
                .addAggregation(AggregationBuilders.min("ageMin").field("age"))
                .withPageable(PageRequest.of(0,1)) // 应该设置为0,因为只需要聚合数据,但无赖有校验设置不了
                .build();
        SearchHits<EsTest> search = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("match all-> 总数量:{} 结果:{}", search.getTotalHits(),JSONObject.toJSONString(search.getAggregations()));

        // 先分组 在聚合
        NativeSearchQuery build1 = new NativeSearchQueryBuilder()
                .addAggregation(AggregationBuilders.terms("groupBySex").field("sex")
                        .subAggregation(AggregationBuilders.avg("ageAvg").field("age"))
                        .subAggregation(AggregationBuilders.sum("ageSum").field("age"))
                        .subAggregation(AggregationBuilders.max("ageMax").field("age"))
                        .subAggregation(AggregationBuilders.min("ageMin").field("age"))
                )
                .withPageable(PageRequest.of(0,1)) // 应该设置为0,因为只需要聚合数据,但无赖有校验设置不了
                .build();
        SearchHits<EsTest> search1 = elasticsearchRestTemplate.search(build1, EsTest.class);
        Map<String, Aggregation> map = search1.getAggregations().asMap();
        Aggregation groupBySex = map.get("groupBySex");
        log.info("打断点看吧:{}",groupBySex);
    }

场景查询实操

查询2023年中男、女的数量并找出对应的最大/最小年龄

    /** 查询2023年中男、女的数量并找出对应的最大/最小年龄 */
    @Test
    void demo1() {
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .addAggregation(AggregationBuilders.terms("groupBySex").field("sex")
                        .subAggregation(AggregationBuilders.count("count").field("id"))
                        .subAggregation(AggregationBuilders.max("maxAge").field("age"))
                        .subAggregation(AggregationBuilders.min("minAge").field("age"))
                ).withPageable(PageRequest.of(0,1)).build();
        SearchHits<EsTest> search = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("打断点查看:{}",search.getAggregations());
    }

查询在地址中包含 "深圳" 或者 备注中包含 "积极" 的 男性青年(18-30岁)

要求关键词高亮

/** 查询在地址中包含 "深圳" 或者 备注中包含 "积极" 的 男性青年(18-30岁),要求关键词高亮 */
    @Test
    void demo2() {
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.boolQuery().must(QueryBuilders.termQuery("sex","男"))
                        .must(QueryBuilders.rangeQuery("age").gte(18).lte(30))
                        .must(QueryBuilders.boolQuery()
                                .should(QueryBuilders.matchQuery("addressLocation","深圳"))
                                .should(QueryBuilders.matchQuery("remark","积极"))
                        )
                )
                .withHighlightBuilder(new HighlightBuilder().preTags("<span style='color:red'>").postTags("</span>"))
                .withHighlightFields(new HighlightBuilder.Field("addressLocation"),new HighlightBuilder.Field("remark"))
                .build();
        SearchHits<EsTest> search = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("总量:{} 数据:{}",search.getTotalHits(),JSONObject.toJSONString(search.getSearchHits()));
    }

要求根据关键字找出匹配项目标,高亮实时预览

(搜地址、名称,返回 名称+id + 地址)

/** 搜索框:要求根据关键字找出匹配项目标,高亮实时预览(搜地址、名称,返回 名称+id + 地址) */
    @Test
    void demo3() {
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.multiMatchQuery("林深","name","addressLocation"))
                .withFields("id", "name","addressLocation")
                .withHighlightBuilder(new HighlightBuilder().preTags("<span style='color:red'>").postTags("</span>"))
                .withHighlightFields(new HighlightBuilder.Field("addressLocation"),new HighlightBuilder.Field("name"))
                .build();
        SearchHits<EsTest> search = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("总量:{} 数据:{}",search.getTotalHits(),JSONObject.toJSONString(search.getSearchHits()));
    }

分别找出男、女性别中年龄最小的三个人(TOP N)

    /** 分别找出男、女性别中年龄最小的三个人(TOP N) */
    @Test
    void demo4() {
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .addAggregation(AggregationBuilders.terms("groupBySex").field("sex")
                        .subAggregation(AggregationBuilders.topHits("top3")
                                .sort("age",SortOrder.ASC)
                                .fetchSource(new String[]{"name","sex","age"},null)
                                .size(3)
                        )
                )
                .build();
        SearchHits<EsTest> search = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("打断点自己看-》总量:{} 数据:{}",search.getTotalHits(),search.getAggregations());
    }

查询tag中带有某些标签的或者出身地在某某地的人,按照年龄降序,并且分页

    /** 查询tag中带有某些标签的或者出身地在某某地的人,按照年龄降序,并且分页 */
    @Test
    void demo5() {
        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.boolQuery()
                        .should(QueryBuilders.termsQuery("tag","断能能","高于动","上格心","对朗步"))
                        .should(QueryBuilders.termsQuery("birthAddress","深圳","章丘"))
                )
                .withSort(SortBuilders.fieldSort("age").order(SortOrder.DESC))
                .withSort(SortBuilders.scoreSort().order(SortOrder.DESC))
                .withPageable(PageRequest.of(0,5))
                .build();
        SearchHits<EsTest> search = elasticsearchRestTemplate.search(build, EsTest.class);
        log.info("总量:{} 数据:{}",search.getTotalHits(),search.getSearchHits());
    }

总结

到了这恭喜你,你也成功的入门ES,成为了一名ES的CURD BOY,但你觉得ES就仅仅如此吗?少年加油吧,才刚开始呢!!

后面会介绍一些重点操作,以及相应的进阶理论知识,理论会偏多!

https://blog.51cto.com/u_15874356/6127046open in new window

https://docs.spring.io/spring-data/elasticsearch/docs/current/reference/html/#preface.requirementsopen in new window

https://www.elastic.co/guide/en/elasticsearch/reference/7.17/mapping-date-format.html#mapping-date-formatopen in new window

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