ElasticSearch安装中文分词插件
cd /usr/local/src/elasticsearch-6.5.2
./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.5.2/elasticsearch-analysis-ik-6.5.2.zip
关于中文分词
POST /my_index/_analyze
{
"analyzer":"ik_max_word",
"text":"没有到医院开处方订购处方药是非法的"
}
POST /my_index/_analyze
{
"analyzer":"ik_smart",
"text":"没有到医院开处方订购处方药是非法的"
}
POST /my_index/_analyze
{
"analyzer":"smartcn",
"text":"没有到医院开处方订购处方药是非法的"
}
可以看出最不准的就是smartcn，这个中文分析器尽可能不要用。
ElasticSearch6.5 安装中文拼音分词插件
cd /usr/local/src/elasticsearch-6.5.2
./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-pinyin/releases/download/v6.5.2/elasticsearch-analysis-pinyin-6.5.2.zip
创建索引，配置两种分词器
PUT /blog/
{
"settings":{
"number_of_shards": 3,
"number_of_replicas": 1,
"analysis": {
"analyzer": {
"default":{
"tokenizer":"ik_max_word"
},
"pinyin_analyzer": {
"type": "custom",
"tokenizer": "my_pinyin",
"filter": ["word_delimiter"]
}
},
"tokenizer": {
"my_pinyin" : {
"type" : "pinyin",
"keep_first_letter":true,
"keep_separate_first_letter" : false,
"keep_full_pinyin" : true,
"keep_original" : false,
"limit_first_letter_length" : 16,
"lowercase" : true
}
}
}
}
}
针对索引配置字段映射
PUT /blog/_mapping/article
{
"properties" : {
"title" : {
"type" : "text",
"analyzer" : "ik_max_word",
"include_in_all" : true,
"fields" : {
"pinyin" : {
"type" : "text",
"term_vector" : "with_positions_offsets",
"analyzer" : "pinyin_analyzer",
"boost" : 10
}
}
},
"content":{
"type":"text",
"analyzer" : "ik_max_word"
},
"author":{
"type":"text",
"analyzer" : "ik_max_word"
},
"keyword":{
"type":"text",
"analyzer" : "ik_max_word"
},
"createtime":{
"type":"date",
"format":"yyyy-MM-dd HH:mm:ss || yyyy-MM-dd || epoch_millis"
}
}
}
检查自定义的词语分析器是否生效
GET /blog/_analyze
{
"text":"刘德华",
"analyzer":"pinyin_analyzer"
}
填充一些内容
POST /blog/article/1
{
"title":"张靓颖2018年演唱会将在北京举行",
"content":"张靓颖2018年跨年演唱会将在北京市海淀剧院举行",
"author":"王军",
"createtime":"2018-12-26"
}
按照拼音搜索
POST /blog/article/_search
{
"query":{
"match":{
"title.pinyin":"liudehua"
}
}
}
按照中文名进行搜索
POST /blog/article/_search
{
"query":{
"match":{
"title":"刘德华"
}
}
}
按照中文加拼音一起搜索
POST blog/article/_search
{
"query": {
"multi_match": {
"type":"most_fields",
"query":"刘德h",
"fields":["title", "title.pinyin"]
}
}
}
最终结果:
{
"took" : 76,
"timed_out" : false,
"_shards" : {
"total" : 3,
"successful" : 3,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : 1,
"max_score" : 14.556091,
"hits" : [
{
"_index" : "blog",
"_type" : "article",
"_id" : "1",
"_score" : 14.556091,
"_source" : {
"title" : "刘德华2018年演唱会将在北京举行",
"content" : "刘德华2018年跨年演唱会将在北京市朝阳区鸟巢体育馆举行",
"author" : "王军",
"createtime" : "2018-12-26"
}
}
]
}
}
通过 validate-query API 来执行这个查询可以帮助你理解查询是如何执行的
GET blog/article/_validate/query?explain
{
"query": {
"multi_match": {
"type":"most_fields",
"query":"刘德h",
"fields":["title", "title.pinyin"]
}
}
}
执行结果:
{
"_shards" : {
"total" : 1,
"successful" : 1,
"failed" : 0
},
"valid" : true,
"explanations" : [
{
"index" : "blog",
"valid" : true,
"explanation" : "+((title:刘 title:德 title:h) | ((title.pinyin:liu)^10.0 (title.pinyin:de)^10.0 Synonym(title.pinyin:h title.pinyin:ldh)))~1.0 #*:*"
}
]
}
