世界上并沒有完美的程序，但是我們并不因此而沮喪，因為寫程序就是一個不斷追求完美的過程。

自定義分析器 :

Character filters :
????1. 作用 : 字符的增、刪、改轉(zhuǎn)換
????2. 數(shù)量限制 : 可以有0個或多個
????3. 內(nèi)建字符過濾器 :
????????1. HTML Strip Character filter : 去除html標簽
????????2. Mapping Character filter : 映射替換
????????3. Pattern Replace Character filter : 正則替換

Tokenizer :
????1. 作用 :
????????1. 分詞
????????2. 記錄詞的順序和位置（短語查詢）
????????3. 記錄詞的開頭和結(jié)尾位置（高亮）
????????4. 記錄詞的類型（分類）
????2. 數(shù)量限制 : 有且只能有一個
????3. 分類 :
????????1. 完整分詞 :
????????????1. Standard
????????????2. Letter
????????????3. Lowercase
????????????4. whitespace
????????????5. UAX URL Email
????????????6. Classic
????????????7. Thai
????????2. 切詞 :
????????????1. N-Gram
????????????2. Edge N-Gram
????????3. 文本 :
????????????1. Keyword
????????????2. Pattern
????????????3. Simple Pattern
????????????4. Char Group
????????????5. Simple Pattern split
????????????6. Path

Token filters :
????1. 作用 : 分詞的增、刪、改轉(zhuǎn)換
????2. 數(shù)量限制 : 可以有0個或多個
????3. 分類 :
????????1. apostrophe
????????2. asciifolding
????????3. cjk bigram
????????4. cjk width
????????5. classic
????????6. common grams
????????7. conditional
????????8. decimal digit
????????9. delimited payload
????????10. dictionary decompounder
????????11. edge ngram
????????12. elision
????????13. fingerprint
????????14. flatten_graph
????????15. hunspell
????????16. hyphenation decompounder
????????17. keep types
????????18. keep words
????????19. keyword marker
????????20. keyword repeat
????????21. kstem
????????22. length
????????23. limit token count
????????24. lowercase
????????25. min_hash
????????26. multiplexer
????????27. ngram
????????28. normalization
????????29. pattern_capture
????????30. pattern replace
????????31. porter stem
????????32. predicate script
????????33. remove duplicates
????????34. reverse
????????35. shingle
????????36. snowball
????????37. stemmer
????????38. stemmer override
????????39. stop
????????40. synonym
????????41. synonym graph

今天演示38 - 41
重點 : stop, synonym

# stemmer override token filter # 作用 : 自定義詞干映射 # 條件 : 必須放在所有詞干提取器之前 # 配置項 : # 1. rules : 映射 # 2. rules_path : 映射路徑GET /_analyze {"tokenizer" : "whitespace","filter" : [{"type" : "stemmer_override","rules" : ["gooding, goodly => good","hello => hi","中國 => 中華人民共和國"]}],"text" : ["hello gooding me 中國"] }# 結(jié)果 {"tokens" : [{"token" : "hi","start_offset" : 0,"end_offset" : 5,"type" : "word","position" : 0},{"token" : "good","start_offset" : 6,"end_offset" : 13,"type" : "word","position" : 1},{"token" : "me","start_offset" : 14,"end_offset" : 16,"type" : "word","position" : 2},{"token" : "中華人民共和國","start_offset" : 17,"end_offset" : 19,"type" : "word","position" : 3}] } # stop token filter # 作用 : 移除停用詞 # 配置項 : # 1. stopwords : 停用詞列表或語言 # 2. stopwords_path : 停用詞文件路徑 # 3. ignore_case : 是否忽略大小寫，默認false # 4. remove_trailing : 移除末尾的停用詞，默認false，但是在completion suggester中建議設(shè)置為true以便更好的匹配GET /_analyze {"tokenizer" : "whitespace","filter" : [{"type" : "stop","stopwords" : ["this", "is", "a"]}],"text" : ["this is a good boy"] }# 結(jié)果 {"tokens" : [{"token" : "good","start_offset" : 10,"end_offset" : 14,"type" : "word","position" : 3},{"token" : "boy","start_offset" : 15,"end_offset" : 18,"type" : "word","position" : 4}] } # synonym token filter # 作用 : 添加同義詞 # 配置項 : # 1. synonyms : 同義詞列表，支持solr和wordnet格式 # 2. synonyms_path : 同義詞文件路徑 # 使用建議 : 搜索時使用同義詞，索引時不使用同義詞GET /_analyze {"tokenizer" : "whitespace","filter" : [{"type" : "synonym","synonyms" : ["hello, hi => hell, he", "中國, 中國人, 我是中國人"]}],"text" : ["hello gooding me hi this is me 中國"] }# 結(jié)果 {"tokens" : [{"token" : "hell","start_offset" : 0,"end_offset" : 5,"type" : "SYNONYM","position" : 0},{"token" : "he","start_offset" : 0,"end_offset" : 5,"type" : "SYNONYM","position" : 0},{"token" : "gooding","start_offset" : 6,"end_offset" : 13,"type" : "word","position" : 1},{"token" : "me","start_offset" : 14,"end_offset" : 16,"type" : "word","position" : 2},{"token" : "hell","start_offset" : 17,"end_offset" : 19,"type" : "SYNONYM","position" : 3},{"token" : "he","start_offset" : 17,"end_offset" : 19,"type" : "SYNONYM","position" : 3},{"token" : "this","start_offset" : 20,"end_offset" : 24,"type" : "word","position" : 4},{"token" : "is","start_offset" : 25,"end_offset" : 27,"type" : "word","position" : 5},{"token" : "me","start_offset" : 28,"end_offset" : 30,"type" : "word","position" : 6},{"token" : "中國","start_offset" : 31,"end_offset" : 33,"type" : "word","position" : 7},{"token" : "中國人","start_offset" : 31,"end_offset" : 33,"type" : "SYNONYM","position" : 7},{"token" : "我是中國人","start_offset" : 31,"end_offset" : 33,"type" : "SYNONYM","position" : 7}] } # synonym graph token filter # 作用 : 添加同義詞，只支持搜索分析器 # 配置項 : # 1. synonyms : 同義詞列表，支持solr和wordnet格式 # 2. synonyms_path : 同義詞文件路徑GET /_analyze {"tokenizer" : "whitespace","filter" : [{"type" : "synonym_graph","synonyms" : ["hello, hi => hell, he", "中國, 中國人, 我是中國人"]}],"text" : ["hello gooding me hi this is me 中國"] }# 結(jié)果 {"tokens" : [{"token" : "hell","start_offset" : 0,"end_offset" : 5,"type" : "SYNONYM","position" : 0},{"token" : "he","start_offset" : 0,"end_offset" : 5,"type" : "SYNONYM","position" : 0},{"token" : "gooding","start_offset" : 6,"end_offset" : 13,"type" : "word","position" : 1},{"token" : "me","start_offset" : 14,"end_offset" : 16,"type" : "word","position" : 2},{"token" : "hell","start_offset" : 17,"end_offset" : 19,"type" : "SYNONYM","position" : 3},{"token" : "he","start_offset" : 17,"end_offset" : 19,"type" : "SYNONYM","position" : 3},{"token" : "this","start_offset" : 20,"end_offset" : 24,"type" : "word","position" : 4},{"token" : "is","start_offset" : 25,"end_offset" : 27,"type" : "word","position" : 5},{"token" : "me","start_offset" : 28,"end_offset" : 30,"type" : "word","position" : 6},{"token" : "中國人","start_offset" : 31,"end_offset" : 33,"type" : "SYNONYM","position" : 7},{"token" : "我是中國人","start_offset" : 31,"end_offset" : 33,"type" : "SYNONYM","position" : 7},{"token" : "中國","start_offset" : 31,"end_offset" : 33,"type" : "word","position" : 7}] }

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