springboot整合elasticSearch

引入依赖

cpp 复制代码

<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>7.4.2</version>
</dependency>

配置类

cpp 复制代码

@Bean
RestHighLevelClient client() {
RestClientBuilder builder = RestClient.builder(new HttpHost("192.168.56.10", 9200, "http"));
return new RestHighLevelClient(builder);
}

使用

cpp 复制代码

@Test
void test1() throws IOException {
Product product = new Product();
product.setSpuName("华为");
product.setId(10L);
IndexRequest request = new IndexRequest("product").id("20")
.source("spuName","华为","id",20L);
try {
IndexResponse response = client.index(request, RequestOptions.DEFAULT);
System.out.println(request.toString());
IndexResponse response2 = client.index(request, RequestOptions.DEFAULT);
} catch (ElasticsearchException e) {
if (e.status() == RestStatus.CONFLICT) {
}
}
}

详细操作类

cpp 复制代码

@RunWith(SpringRunner.class)
@SpringBootTest
public class GulimallSearchApplicationTests {


    @Resource
    private RestHighLevelClient client;

    @ToString
    @Data
    static class Account {
        private int account_number;
        private int balance;
        private String firstname;
        private String lastname;
        private int age;
        private String gender;
        private String address;
        private String employer;
        private String email;
        private String city;
        private String state;
    }


    /**
     * 复杂检索:在bank中搜索address中包含mill的所有人的年龄分布以及平均年龄，平均薪资
     *
     * @throws IOException
     */
    @Test
    public void searchData() throws IOException {
        //1. 创建检索请求
        SearchRequest searchRequest = new SearchRequest();

        //1.1）指定索引
        searchRequest.indices("bank");
        //1.2）构造检索条件
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.matchQuery("address", "Mill"));


        //1.2.1)按照年龄分布进行聚合
        TermsAggregationBuilder ageAgg = AggregationBuilders.terms("ageAgg").field("age").size(10);
        sourceBuilder.aggregation(ageAgg);

        //1.2.2)计算平均年龄
        AvgAggregationBuilder ageAvg = AggregationBuilders.avg("ageAvg").field("age");
        sourceBuilder.aggregation(ageAvg);
        //1.2.3)计算平均薪资
        AvgAggregationBuilder balanceAvg = AggregationBuilders.avg("balanceAvg").field("balance");
        sourceBuilder.aggregation(balanceAvg);

        System.out.println("检索条件：" + sourceBuilder);
        searchRequest.source(sourceBuilder);
        //2. 执行检索
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        System.out.println("检索结果：" + searchResponse);

        //3. 将检索结果封装为Bean
        SearchHits hits = searchResponse.getHits();
        SearchHit[] searchHits = hits.getHits();
        for (SearchHit searchHit : searchHits) {
            String sourceAsString = searchHit.getSourceAsString();
            Account account = JSON.parseObject(sourceAsString, Account.class);
            System.out.println(account);

        }

        //4. 获取聚合信息
        Aggregations aggregations = searchResponse.getAggregations();

        Terms ageAgg1 = aggregations.get("ageAgg");

        for (Terms.Bucket bucket : ageAgg1.getBuckets()) {
            String keyAsString = bucket.getKeyAsString();
            System.out.println("年龄：" + keyAsString + " ==> " + bucket.getDocCount());
        }
        Avg ageAvg1 = aggregations.get("ageAvg");
        System.out.println("平均年龄：" + ageAvg1.getValue());

        Avg balanceAvg1 = aggregations.get("balanceAvg");
        System.out.println("平均薪资：" + balanceAvg1.getValue());
    }


    /**
     * @throws IOException
     */
    @Test
    public void searchState() throws IOException {
        //1. 创建检索请求
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        //        sourceBuilder.query(QueryBuilders.termQuery("city", "Nicholson"));
        //        sourceBuilder.from(0);
        //        sourceBuilder.size(5);
        //        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
        QueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("state", "AK");
        //                .fuzziness(Fuzziness.AUTO)
        //                .prefixLength(3)
        //                .maxExpansions(10);
        sourceBuilder.query(matchQueryBuilder);
        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("bank");
        searchRequest.source(sourceBuilder);
        //2. 执行检索
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        System.out.println(searchResponse);

    }

    /**
     * 测试ES数据
     * 更新也可以
     */
    @Test
    public void indexData() throws IOException {

        IndexRequest indexRequest = new IndexRequest("users");
        indexRequest.id("1");   //数据的id

        // indexRequest.source("userName","zhangsan","age",18,"gender","男");

        User user = new User();
        user.setUserName("zhangsan");
        user.setAge(18);
        user.setGender("男");

        String jsonString = JSON.toJSONString(user);
        indexRequest.source(jsonString, XContentType.JSON);  //要保存的内容

        //执行操作
        IndexResponse index = client.index(indexRequest, GulimallElasticSearchConfig.COMMON_OPTIONS);

        //提取有用的响应数据
        System.out.println(index);

    }

    @Getter
    @Setter
    class User {
        private String userName;
        private String gender;
        private Integer age;
    }

    @Test
    public void contextLoads() {

        System.out.println(client);

    }
}

新增数据

批量保存数据