大型网站建设推荐电子商务网站建设的意义
目录
一.引入依赖
二.配置链接信息
三.索引库测试
1.创建索引库
2.查询索引库
3.删除索引库
四.文档测试
1.添加文档
2.修改文档
3.删除文档
4.查询具体文档
5.批量添加文档
五.查询测试
1.查询所有
2.根据属性term匹配查询
3.分页查询
4.排序
5.过滤属性
6.bool查询
7.范围查询
8.模糊查询
9.高亮查询
10.聚合查询
10.1最大年龄
10.2分组查询
一.引入依赖
<dependencies><dependency><groupId>org.elasticsearch</groupId><artifactId>elasticsearch</artifactId><version>7.8.0</version></dependency><!--es的客户端--><dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-high-level-client</artifactId><version>7.8.0</version></dependency></dependencies>二.配置链接信息
#自定义elasticsearch连接配置
elasticsearch:host: 192.168.81.128port: 9200@Getter
@Setter
@Configuration
@ConfigurationProperties(prefix = "elasticsearch")
public class ElasticSearchConfig {private String host;private int port;@Beanpublic RestHighLevelClient client(){return new RestHighLevelClient(RestClient.builder(new HttpHost(host, port, "http")));}
}三.索引库测试
1.创建索引库
/*** 添加索引库*/@Testpublic void AddIndex() throws IOException {//创建索引库CreateIndexRequest request = new CreateIndexRequest("user");//获取响应CreateIndexResponse response =restHighLevelClient.indices().create(request,RequestOptions.DEFAULT);boolean acknowledged = response.isAcknowledged();System.out.println("响应状态:"+acknowledged);}2.查询索引库
//查询索引库@Testpublic void testGetIndex() throws IOException {GetIndexRequest request = new GetIndexRequest("user");GetIndexResponse response = restHighLevelClient.indices().get(request, RequestOptions.DEFAULT);//System.out.println(response.getAliases());//获取默认配置System.out.println(response.getDefaultSettings());//获取索引名称System.out.println(Arrays.toString(response.getIndices()));//获取映射System.out.println(response.getMappings());}
3.删除索引库
/*** 删除索引库*/@Testpublic void testDeleteIndex() throws IOException {//删除索引请求DeleteIndexRequest request = new DeleteIndexRequest("user");AcknowledgedResponse response = restHighLevelClient.indices().delete(request,RequestOptions.DEFAULT);System.out.println(response.isAcknowledged());restHighLevelClient.close();}四.文档测试
1.添加文档
/*** 添加文档*/@Testpublic void testAddDoucument() throws IOException {/*** 第一次不存在时是创建，* 第二次存在时就是修改，将修改version版本号*/IndexRequest indexRequest = new IndexRequest("user");indexRequest.id("122");User user = new User();user.setId(122);user.setName("张三");user.setAge(12);user.setScore(123);//添加数据indexRequest.source(JSON.toJSONString(user), XContentType.JSON);IndexResponse response = restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);//获取索引库idSystem.out.println(response.getIndex());//获取文档idSystem.out.println(response.getId());//获取版本System.out.println(response.getVersion());//获取结果System.out.println(response.getResult());}2.修改文档
/*** 修改文档*/@Testpublic void testUpadteDoc() throws IOException {UpdateRequest updateRequest = new UpdateRequest("user","122");User user = new User();user.setId(122);user.setName("张三");user.setAge(13);user.setScore(123);updateRequest.doc(JSON.toJSONString(user), XContentType.JSON);UpdateResponse res = restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);System.out.println(res.getId());System.out.println(res.getIndex());System.out.println(res.getResult());System.out.println(res.getVersion());restHighLevelClient.close();}3.删除文档
/*** 删除文档*/@Testpublic void testDelteDoc() throws IOException {DeleteRequest deleteRequest = new DeleteRequest("user","122");DeleteResponse res = restHighLevelClient.delete(deleteRequest, RequestOptions.DEFAULT);System.out.println(res.getId());System.out.println(res.getIndex());System.out.println(res.getResult());}4.查询具体文档
/*** 查询文档*/@Testpublic void testGetDoc() throws IOException {GetRequest getRequest =new GetRequest("user","122");GetResponse res = restHighLevelClient.get(getRequest, RequestOptions.DEFAULT);System.out.println(res.getIndex());System.out.println(res.getId());System.out.println(res.getSource());System.out.println(res.getFields());System.out.println(res.getSourceAsString()); //返回json串
// user
// 122
// {score=123, name=张三, id=122, age=12}
// {}
// {"age":12,"id":122,"name":"张三","score":123}}5.批量添加文档
/*** 批量添加文档*/@Testpublic void testBulkAdd() throws IOException {User user1 = new User(1,"王五",12,213);User user2 = new User(2,"李四",321,213);User user3 = new User(3,"赵六",24,213);User user4 = new User(4,"zhangsan",41,213);User user5 = new User(5,"蔡徐坤",21,213);BulkRequest request = new BulkRequest("user");IndexRequest request1 = new IndexRequest("user").id(user1.getId().toString());request1.source(JSON.toJSONString(user1),XContentType.JSON);IndexRequest request2 = new IndexRequest("user").id(user2.getId().toString());request2.source(JSON.toJSONString(user2),XContentType.JSON);IndexRequest request3 = new IndexRequest("user").id(user3.getId().toString());request3.source(JSON.toJSONString(user3),XContentType.JSON);IndexRequest request4 = new IndexRequest("user").id(user4.getId().toString());;request4.source(JSON.toJSONString(user4),XContentType.JSON);IndexRequest request5 = new IndexRequest("user").id(user5.getId().toString());request5.source(JSON.toJSONString(user5),XContentType.JSON);request.add(request1);request.add(request2);request.add(request3);request.add(request4);request.add(request5);BulkResponse res = restHighLevelClient.bulk(request, RequestOptions.DEFAULT);System.out.println(res.getIngestTook());System.out.println(res.getTook());System.out.println(res.getIngestTookInMillis());}
五.查询测试
1.查询所有
/*** 查询所有*/@Testpublic void testqueryAll() throws IOException {SearchRequest searchRequest = new SearchRequest();//指定索引库searchRequest.indices("user");SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();//查询所有sourceBuilder.query(QueryBuilders.matchAllQuery());searchRequest.source(sourceBuilder);SearchResponse res = client.search(searchRequest, RequestOptions.DEFAULT);//查询匹配SearchHits hits = res.getHits();System.out.println("took：" + res.getTook());System.out.println("是否超时：" + res.isTimedOut());System.out.println("TotalHits：" + hits.getTotalHits());System.out.println("MaxScore：" + hits.getMaxScore());for (SearchHit hit : hits) {System.out.println(hit.getSourceAsString());}}2.根据属性term匹配查询
/*** 根据term条件查询* @throws IOException*/@Testpublic void testTermQuery() throws IOException {SearchRequest request = new SearchRequest();request.indices("user");//构建查询的请求体SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();//查询所有对象sourceBuilder.query(QueryBuilders.termQuery("name","zhangsan"));request.source(sourceBuilder);SearchResponse response = client.search(request, RequestOptions.DEFAULT);//查询匹配SearchHits hits = response.getHits();System.out.println("took：" + response.getTook());System.out.println("是否超时：" + response.isTimedOut());System.out.println("TotalHits：" + hits.getTotalHits());System.out.println("MaxScore：" + hits.getMaxScore());for (SearchHit hit : hits) {System.out.println(hit.getSourceAsString());}}
3.分页查询
/*** 分页查询*/@Testpublic void testPageQuery() throws IOException {SearchRequest request = new SearchRequest();request.indices("user");//构建查询的请求体SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();//查询所有对象sourceBuilder.query(QueryBuilders.matchAllQuery());//第一页sourceBuilder.from(0);//三条记录sourceBuilder.size(11);request.source(sourceBuilder);//添加分页信息SearchResponse response = client.search(request, RequestOptions.DEFAULT);//查询匹配SearchHits hits = response.getHits();System.out.println("took：" + response.getTook());System.out.println("是否超时：" + response.isTimedOut());System.out.println("TotalHits：" + hits.getTotalHits());System.out.println("MaxScore：" + hits.getMaxScore());for (SearchHit hit : hits) {System.out.println(hit.getSourceAsString());}}
4.排序
//年龄排序 倒序，从大到小sourceBuilder.sort("age", SortOrder.DESC);5.过滤属性
//查询过滤字段String[] excludes = {"age"};//过滤掉age属性String[] includes = {};sourceBuilder.fetchSource(includes,excludes);
6.bool查询
//创建搜索对象SearchRequest request = new SearchRequest();request.indices("user");//构建查询的请求体SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();//必须包含boolQuery.must(QueryBuilders.matchQuery("age",18));//一定不包含boolQuery.mustNot(QueryBuilders.matchQuery("name","lisi"));//可能包含boolQuery.should(QueryBuilders.matchQuery("name","zhangsan"));//查询所有对象sourceBuilder.query(boolQuery);request.source(sourceBuilder);SearchResponse response = client.search(request, RequestOptions.DEFAULT);
7.范围查询
//创建搜索对象SearchRequest request = new SearchRequest();request.indices("user");//构建查询的请求体SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();//范围查询RangeQueryBuilder rangeQuery = QueryBuilders.rangeQuery("age");//大于等于rangeQuery.gte("19");//小于等于rangeQuery.lte("40");//查询所有对象sourceBuilder.query(rangeQuery);request.source(sourceBuilder);SearchResponse response = client.search(request, RequestOptions.DEFAULT);
8.模糊查询
//创建搜索对象SearchRequest request = new SearchRequest();request.indices("user");//构建查询的请求体SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();//模糊查询FuzzyQueryBuilder fuzzyQuery = QueryBuilders.fuzzyQuery("name", "zhangsan");fuzzyQuery.fuzziness(Fuzziness.ONE);sourceBuilder.query(fuzzyQuery);request.source(sourceBuilder);SearchResponse response = client.search(request, RequestOptions.DEFAULT);9.高亮查询
//高亮查询SearchRequest request = new SearchRequest("user");//创建查询请求体构建器SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();//构建查询方式，高亮查询TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "zhangsan");//设置查询方式sourceBuilder.query(termQueryBuilder);//构建高亮字段HighlightBuilder highlightBuilder = new HighlightBuilder();//设置标签前缀highlightBuilder.preTags("<font color='red'");//设置标签后缀highlightBuilder.postTags("</font>");//设置高亮字段highlightBuilder.field("name");//设置高亮构建对象sourceBuilder.highlighter(highlightBuilder);//设置请求体request.source(sourceBuilder);//客户端发送请求，获取响应对象SearchResponse response = client.search(request, RequestOptions.DEFAULT);// 打印响应结果SearchHits hits = response.getHits();System.out.println("took::"+response.getTook());System.out.println("time_out::"+response.isTimedOut());System.out.println("total::"+hits.getTotalHits());System.out.println("max_s core::"+hits.getMaxScore());System.out.println("hits::::>>");for (SearchHit hit : hits) {String sourceAsString = hit.getSourceAsString();System.out.println(sourceAsString);//打印高亮结果Map<String, HighlightField> highlightFields = hit.getHighlightFields();System.out.println(highlightFields);System.out.println("<<::::");}10.聚合查询
10.1最大年龄
SearchRequest request = new SearchRequest().indices("user");SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();sourceBuilder.aggregation(AggregationBuilders.max("maxAge").field("age"));//设置请求体request.source(sourceBuilder);SearchResponse response = client.search(request, RequestOptions.DEFAULT);//打印响应结果SearchHits hits = response.getHits();System.out.println("hits = " + hits);System.out.println(response);
10.2分组查询
//创建搜索对象SearchRequest request = new SearchRequest().indices("user");SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();searchSourceBuilder.aggregation(AggregationBuilders.terms("age_groupby").field("age"));//设置请求体request.source(searchSourceBuilder);SearchResponse response = client.search(request, RequestOptions.DEFAULT);System.out.println(response.getHits());System.out.println(response);