大连市建设学校网站,免费ppt模板下载网站入口,东莞人才网最新招聘信息,信息流广告投放平台有哪些文章目录一、准备1. 导入依赖2. 测试数据二、全文搜索2.1. 匹配搜索#xff08;会拆词#xff09;2.2. 短语搜索2.3. queryString搜索2.4. 多字段匹配搜索三、词条级搜索3.1. 词条级搜索3.2. 词条集合搜索(terms query)3.3. 范围搜索( range query)3.4. 不为空搜索(exists qu…
文章目录一、准备1. 导入依赖2. 测试数据二、全文搜索2.1. 匹配搜索会拆词2.2. 短语搜索2.3. queryString搜索2.4. 多字段匹配搜索三、词条级搜索3.1. 词条级搜索3.2. 词条集合搜索(terms query)3.3. 范围搜索( range query)3.4. 不为空搜索(exists query)3.5. 词项前缀搜索(prefix query)3.6. 通配符搜索(wildcard query)3.7. 正则搜索3.8. 模糊搜索(fuzzy query)3.9. ids搜索(id集合查询)(ids query)四、复合查询4.1. 复合查询4.2. 排序五、分词器5.1. 不设置分词器使用默认分词器5.2. 指定分词器使用IK最大分词5.3. 指定分词器使用IK最小分词一、准备
1. 导入依赖 !--springboot 2.2.5 需要指定es版本默认引入es版本6.x--dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-data-elasticsearch/artifactId/dependency2. 测试数据
PUT /yuangong
{settings: {},mappings: {properties: {name: {type: text,analyzer: ik_max_word},alias: {type: text},age: {type: integer},sex: {type: keyword},phone: {type: text},title: {type: text,analyzer: ik_max_word},slogan: {type: text}}}
}POST /yuangong/_doc/
{name: 张三三,alias: 小张,age: 28,sex: 男,phone: 183xxxx0000,title: 初级Java开发,slogan: 苟富贵勿相忘
}POST /yuangong/_doc/
{name: 李四,alias: 小四,age: 25,sex: 男,phone: 183xxxx0001,title: 高级Java开发,slogan: 行路难行路难多歧路今安在
}POST /yuangong/_doc/
{name: 王五,alias: 五哥,age: 30,sex: 男,phone: 183xxxxx0002,title: 资深Java开发,slogan: 逾期感慨路难行不如马上出发
}POST /yuangong/_doc/
{name: 王六,alias: 名与,age: 28,sex: 男,phone: 183xxxx0003,title: 高级前端开发,slogan: 超越自己
}POST /yuangong/_doc/
{name: 王狗蛋,alias: 狗蛋,age: 31,sex: 男,phone: 183xxxx0004,title: 高级产品经理,slogan: 明哲保身
}POST /yuangong/_doc/
{name: 王麻子,alias: 逍遥子,age: 30,sex: 女,phone: 183xxxx0005,title: 资深业务专家,slogan: 鹏之大不知其几千里也
}POST /yuangong/_doc/
{name: 周二,alias: 二子,age: 22,sex: 男,phone: 18300000006,title: 初级测试开发,slogan: 冷冷的冰雨在我脸上胡乱的拍
}二、全文搜索
2.1. 匹配搜索会拆词
和数据类型有关
1如果被查询的字段是keywork查询的时候只能全量匹配不会被拆分
2如果查询字段类型是text查询的值会根据查询字段的分词器进行分词
如如果没有设置分词器张三三会拆成张、三、三匹配出包含【张】或者【三】或者【三】的数据
如如果设置IK分词器
name: {type: text,analyzer: ik_max_word}张三三会拆成张三、三三匹配出包含【张三】或者【三三】的数据
如如果设置IK分词器三三会拆成三三匹配出包含【三三】的数据
3上面使用的是默认的operator默认OR 设置operator为AND的时候
如如果没有设置分词器张三三会拆成张、三、三匹配出包含【张】并且【三】并且【三】的数据
如如果设置IK分词器张三三会拆成张三、三三匹配出包含【张三】并且【三三】的数据
如如果设置IK分词器三三会拆成三三匹配出包含【三三】的数据
public void matchQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();MatchQueryBuilder matchQueryBuilder QueryBuilders.matchQuery(name, 三三).operator(Operator.OR);doSearch(searchRequest,searchSourceBuilder,matchQueryBuilder);
}2.2. 短语搜索
public void matchPhraseQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();MatchPhraseQueryBuilder matchPhraseQueryBuilder QueryBuilders.matchPhraseQuery(title, JAVA开发).slop(1);doSearch(searchRequest,searchSourceBuilder,matchPhraseQueryBuilder);
}2.3. queryString搜索
查询时可以不指定字段查询 public void queryString() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();// QueryStringQueryBuilder queryStringQueryBuilder QueryBuilders.queryStringQuery(不);QueryStringQueryBuilder queryStringQueryBuilder QueryBuilders.queryStringQuery(不).field(slogan);doSearch(searchRequest,searchSourceBuilder,queryStringQueryBuilder);}2.4. 多字段匹配搜索
public void multiMatchQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();MultiMatchQueryBuilder multiMatchQuery QueryBuilders.multiMatchQuery(明,alias,slogan);doSearch(searchRequest,searchSourceBuilder,multiMatchQuery);
}三、词条级搜索
3.1. 词条级搜索
类似于SQL里面的like ①、和字段的数据类型有关如果数据类型是text但是没有指定分词器 例如张三三不指定分词器这个词会被拆分成张、三、三 如果你termQuery里面的value为张三、三三或者张三三都是无法查询到的只有搜索张或者三才能搜索到 ②、和字段的数据类型有关如果数据类型是text但是指定IK分词器 例如张三三指定IK分词器这个词会被拆分成张三、三三 如果你termQuery里面的value为张三或者张三三都是无法查询到的只有搜索张三或者三三才能搜索到 ③、和字段的数据类型有关如果数据类型是keyword 搜索只能是用张三三作为搜索
public void termQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();TermQueryBuilder termQuery QueryBuilders.termQuery(name,张三三);doSearch(searchRequest,searchSourceBuilder,termQuery);}3.2. 词条集合搜索(terms query)
类型与SQL里面的in
public void termsQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();TermsQueryBuilder termsQuery QueryBuilders.termsQuery(slogan,不,鹏);doSearch(searchRequest,searchSourceBuilder,termsQuery);
}3.3. 范围搜索( range query)
/*** 大于或大于等于某个值* param from 被比较的值* param includeLower 是否包含这个值* return*/
public RangeQueryBuilder from(Object from, boolean includeLower){}/*** 小于或小于等于某个值* param to 被比较的值* param includeLower 是否包含这个值* return*/
public RangeQueryBuilder to(Object to, boolean includeLower){}3.4. 不为空搜索(exists query)
相当 SQL 中的 column is not null
public void existsQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();ExistsQueryBuilder existsQuery QueryBuilders.existsQuery(sex);doSearch(searchRequest,searchSourceBuilder,existsQuery);}3.5. 词项前缀搜索(prefix query)
注意prefix query会和分词器联动
①、如果是keyword可以随意前缀
②、如果设置了分词器会根据分词器分的第一个词作为前缀。
如不设置分词器使用默认分词器词汇张三三会被切分成张、三、三这时候前缀只能查张此时搜索张三或者张三三无效
如设置分词器为IK词汇张三三会被切分成张三、三三这时候前缀只能查张三此时搜索张无效
public void prefixQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();PrefixQueryBuilder prefixQuery QueryBuilders.prefixQuery(title,资深);doSearch(searchRequest,searchSourceBuilder,prefixQuery);
}3.6. 通配符搜索(wildcard query)
public void wildcardQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();WildcardQueryBuilder wildcardQuery QueryBuilders.wildcardQuery(name,张*三).boost(2);doSearch(searchRequest,searchSourceBuilder,wildcardQuery);
}3.7. 正则搜索
public void regexpQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();RegexpQueryBuilder regexpQueryBuilder QueryBuilders.regexpQuery(title,高级.*);doSearch(searchRequest,searchSourceBuilder,regexpQueryBuilder);
}3.8. 模糊搜索(fuzzy query)
public void fuzzyQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();FuzzyQueryBuilder fuzzyQueryBuilder QueryBuilders.fuzzyQuery(title,高级);doSearch(searchRequest,searchSourceBuilder,fuzzyQueryBuilder);
}3.9. ids搜索(id集合查询)(ids query)
public void idsQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();IdsQueryBuilder idsQueryBuilder QueryBuilders.idsQuery().addIds(t1UY3nsB1bu3ZtXKDENc);doSearch(searchRequest,searchSourceBuilder,idsQueryBuilder);
}四、复合查询
4.1. 复合查询
public void boolQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();MatchQueryBuilder matchTitleQueryBuilder QueryBuilders.matchQuery(title, 高级);RangeQueryBuilder rangeQueryBuilder QueryBuilders.rangeQuery(age).from(25,false).to(30);BoolQueryBuilder boolQueryBuilder QueryBuilders.boolQuery().must(matchTitleQueryBuilder).mustNot(rangeQueryBuilder);doSearch(searchRequest,searchSourceBuilder,boolQueryBuilder);
}4.2. 排序
public void sortQuery() throws IOException {// 搜索请求对象SearchRequest searchRequest new SearchRequest(yuangong);// 搜索源构建对象SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();MatchQueryBuilder matchTitleQueryBuilder QueryBuilders.matchQuery(title, 高级);RangeQueryBuilder rangeQueryBuilder QueryBuilders.rangeQuery(age).from(25,false).to(30);BoolQueryBuilder boolQueryBuilder QueryBuilders.boolQuery().must(matchTitleQueryBuilder).mustNot(rangeQueryBuilder);doSearch(searchRequest,searchSourceBuilder,boolQueryBuilder);
}public void doSearch(SearchRequest searchRequest,SearchSourceBuilder searchSourceBuilder,QueryBuilder query) throws IOException {// sort,text字段不能用于排序FieldSortBuilder age SortBuilders.fieldSort(age).order(SortOrder.ASC);searchSourceBuilder.query(query).sort(age);// 向搜索请求对象中设置搜索源searchRequest.source(searchSourceBuilder);// 执行搜索,向ES发起http请求SearchResponse searchResponse restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);// 搜索结果SearchHits hits searchResponse.getHits();System.out.println(Arrays.toString(hits.getHits()));
}五、分词器
查看要查询的词是被如何分词了
5.1. 不设置分词器使用默认分词器
# 不设置分词器使用默认分词器
POST _analyze
{text: 资深Java开发
}分词结果
{tokens : [{token : 资,start_offset : 0,end_offset : 1,type : IDEOGRAPHIC,position : 0},{token : 深,start_offset : 1,end_offset : 2,type : IDEOGRAPHIC,position : 1},{token : java,start_offset : 2,end_offset : 6,type : ALPHANUM,position : 2},{token : 开,start_offset : 6,end_offset : 7,type : IDEOGRAPHIC,position : 3},{token : 发,start_offset : 7,end_offset : 8,type : IDEOGRAPHIC,position : 4}]
}5.2. 指定分词器使用IK最大分词
# 指定分词器使用IK最大分词
POST _analyze
{analyzer: ik_max_word,text: 南京市长江大桥
}分词结果
{tokens : [{token : 南京市,start_offset : 0,end_offset : 3,type : CN_WORD,position : 0},{token : 南京,start_offset : 0,end_offset : 2,type : CN_WORD,position : 1},{token : 市长,start_offset : 2,end_offset : 4,type : CN_WORD,position : 2},{token : 长江大桥,start_offset : 3,end_offset : 7,type : CN_WORD,position : 3},{token : 长江,start_offset : 3,end_offset : 5,type : CN_WORD,position : 4},{token : 大桥,start_offset : 5,end_offset : 7,type : CN_WORD,position : 5}]
}5.3. 指定分词器使用IK最小分词
# 指定分词器使用IK最小分词
POST _analyze
{text: 南京市长江大桥,analyzer: ik_smart
}分词结果
{tokens : [{token : 南京市,start_offset : 0,end_offset : 3,type : CN_WORD,position : 0},{token : 长江大桥,start_offset : 3,end_offset : 7,type : CN_WORD,position : 1}]
}
