SpringBoot整合ElasticSearch执行查询操作

喜欢ヅ旅行 2022-03-15 14:31 218阅读 0赞

### 对于ElasticSearch的介绍我就不多说了,能看到这篇博客想必你还是了解它是干嘛的,在使用java去连接这个nosql的时候我建议还是事先去学习一下它的语句语法,当你会这些语法的时候用java的api调用它才会更轻松明理,好了话不多说,直接贴代码: ###

## maven ##

<dependency>
                <groupId>org.elasticsearch.client</groupId>
                <artifactId>elasticsearch-rest-client</artifactId>
                <version>6.2.4</version>
            </dependency>
    
            <dependency>
                <groupId>io.searchbox</groupId>
                <artifactId>jest</artifactId>
                <version>5.3.3</version>
            </dependency>
    
    
    
            <dependency>
                <groupId>org.elasticsearch.client</groupId>
                <artifactId>transport</artifactId>
                <version>6.2.4</version>
            </dependency>
    
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
                
                <exclusions>
                    <exclusion>
                        <groupId>org.slf4j</groupId>
                        <artifactId>slf4j-log4j12</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
    
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>1.1.15</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.webjars.bower</groupId>
                <artifactId>echarts</artifactId>
                <version>4.1.0-release</version>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>

## 配置类 ##

package com.hw.config;
    import org.elasticsearch.client.transport.TransportClient;
    import org.elasticsearch.common.settings.Settings;
    import org.elasticsearch.common.transport.TransportAddress;
    import org.elasticsearch.transport.client.PreBuiltTransportClient;
    import org.springframework.stereotype.Component;
    
    import java.net.InetAddress;
    
    /**
     * @program: springboot-03-elasticsearch
     * @description:
     * @author: hw
     **/
    
    @Component
    public class TransportClientUitl {
        private TransportClient transportClient;
        //transportClient的加载配置
        public TransportClient getClient() throws Exception{
                //连接服务器                                                             //my-application是es的集群名,在配置文件中有
                transportClient  = new PreBuiltTransportClient(Settings.builder().put("cluster.name", "my-application").build())
                        .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.217.155"), 9300));//服务器地址和端口号
            return transportClient;
        }
    }

### 测试方法 ###

//自动注入
        @Autowired
        private TransportClientUitl clientUitl;
        @Test
        public void test2() throws Exception {
            SearchRequestBuilder searchBuilder = clientUitl.getClient().prepareSearch("blog");
            searchBuilder.setTypes("log");
            //设置每批读取的的数据量
            searchBuilder.setSize(10000);
            //默认是查询所有
            //searchBuilder.setQuery(QueryBuilders.queryStringQuery("*:*"));
            //设置 search context 维护1分钟的有效期
            searchBuilder.setScroll(TimeValue.timeValueMillis(3));
            //查询时间范围内的数据
            //RangeQueryBuilder builder=QueryBuilders.rangeQuery("crawlerdate").from("2019-02-21").to("2019-03-01");
            //根据title来精确查询
            MatchPhraseQueryBuilder builder = QueryBuilders.matchPhraseQuery("title", "jsonp解决跨域问题");
            //根据title来查询
    //        MatchQueryBuilder builder = QueryBuilders.matchQuery("title", "jsonp解决跨域问题");
    
            //获得首次查询结果
            SearchResponse searchResponse = searchBuilder.setQuery(builder).setPostFilter(builder).get();
            System.out.println("命中总数量:" + searchResponse.getHits().getTotalHits());
            //打印计数
            int count = 1;
    
            do {
                System.out.println("第" + count + "次打印数据：");
                for (SearchHit hit : searchResponse.getHits().getHits()) {
                    String sourceAsString = hit.getSourceAsString();
                    System.err.println(sourceAsString);
                }
                count++;
                //将scorllId循环传递
                searchResponse=clientUitl.getClient().prepareSearchScroll(searchResponse.getScrollId())
                        .setScroll(TimeValue.timeValueMillis(1)).execute().actionGet();
                //当searchHits的数组为空的时候结束循环，至此数据全部读取完毕
            } while (searchResponse.getHits().getHits().length != 0);
    
    
    
        }

![20190303165002547.png][]

### 其余跟多查询姿势请看注释或者查看源代码或者文档,实例中的基本够用 ###

### 点赞或者评论是我最大的动力,有问题欢迎留言或者联系q:1559810637   ###

[20190303165002547.png]: /images/20220315/48ccfa3bf8ea4b6a936546c003e29c3b.png