1.注册分析器
nalyzer、 tokenizer、 filter可以在elasticsearch.yml 配置
index :
analysis :
analyzer :
standard :
type: standard
stopwords : [stop1, stop2]
myAnalyzer1 :
type: standard
stopwords : [stop1, stop2, stop3]
max_token_length : 500
myAnalyzer2 :
tokenizer : standard
filter : [standard, lowercase, stop]
tokenizer :
myTokenizer1 :
type: standard
max_token_length : 900
myTokenizer2 :
type: keyword
buffer_size : 512
filter :
myTokenFilter1 :
type: stop
stopwords : [stop1, stop2, stop3, stop4]
myTokenFilter2 :
type: length
min : 0
max : 2000
analyzer：ES内置若干analyzer, 另外还可以用内置的character filter, tokenizer, token filter组装一个analyzer(custom analyzer)
index :
analysis :
analyzer :
myAnalyzer :
tokenizer : standard
filter : [standard, lowercase, stop]
如果你要使用第三方的analyzer插件，需要先在配置文件elasticsearch.yml中注册, 下面是配置IkAnalyzer的例子
index:
analysis:
analyzer:
ik:
alias: [ik_analyzer]
type: org.elasticsearch.index.analysis.IkAnalyzerProvider
当一个analyzer在配置文件中被注册到一个名字(logical name)下后，在mapping定义或者一些API里就可以用这个名字来引用该analyzer了。
二.ES中内置的analyzer,tokenizer,filter
ES内置的一些analyzer
| analyzer | logical name | description |
|---|---|---|
| standard analyzer | standard | standard tokenizer, standard filter, lower case filter, stop filter |
| simple analyzer | simple | lower case tokenizer |
| stop analyzer | stop | lower case tokenizer, stop filter |
| keyword analyzer | keyword | 不分词，内容整体作为一个token(not_analyzed) |
| pattern analyzer | whitespace | 正则表达式分词，默认匹配 |
| language analyzers | lang | 各种语言 |
| snowball analyzer | snowball | standard tokenizer, standard filter, lower case filter, stop filter, snowball filter |
| custom analyzer | custom | 一个Tokenizer, 零个或多个Token Filter, 零个或多个Char Filter |
tokenizer：ES内置的tokenizer列表
| tokenizer | logical name | description |
|---|---|---|
| standard tokenizer | standard | |
| edge ngram tokenizer | edgeNGram | |
| keyword tokenizer | keyword | 不分词 |
| letter analyzer | letter | 按单词分 |
| lowercase analyzer | lowercase | letter tokenizer, lower case filter |
| ngram analyzers | nGram | |
| whitespace analyzer | whitespace | 以空格为分隔符拆分 |
| pattern analyzer | pattern | 定义分隔符的正则表达式 |
| uax email url analyzer | uax_url_email | 不拆分url和email |
| path hierarchy analyzer | path_hierarchy | 处理类似/path/to/somthing样式的字符串 |
token filter：ES内置的token filter列表。
| token filter | logical name | description |
|---|---|---|
| standard filter | standar | |
| dascii folding filter | ascii folding | |
| lengthfilter | length | 去掉太长或者太短的 |
| lowercase filter | lowercase | 转成小写 |
| ngram filter | nGram | |
| edge ngram filter | edgeNGram | |
| porter stem filter | porterStem | 波特词干算法 |
| shingle filter | shingle | 定义分隔符的正则表达式 |
| stop filter | stop | 移除 stop wordsword |
| delimiter filter | word_delimiter | 将一个单词再拆成子分词 |
| stemmer token filter | stemmer | |
| stemmer override filter | stemmer_override | |
| keyword marker filter | keyword_marker | |
| keyword repeat filter | keyword_repeat | |
| kstem filter | kstem | |
| snowball filter | snowball | |
| phonetic filte | rphonetic | 插件 |
| synonym filter | synonyms | 处理同义词 |
| compound word filter | dictionary_decompounder, hyphenation_decompounder | 分解复合词 |
| reverse filter | reverse | 反转字符串 |
| elision filter | elision | 去掉缩略语 |
| truncate filter | truncate | 截断字符串 |
| unique filter | unique | |
| pattern capture filter | pattern_capture | |
| pattern replace filter | pattern_replace | 用正则表达式替换 |
| trim filter | trim | 去掉空格 |
| limit token count filter | limit | 限制token数量 |
| hunspell filter | hunspell | 拼写检查 |
| common grams filter | common_grams | |
| normalization filter | arabic_normalization, persian_normalization |
character filter：ES内置的character filter列表
| character filter | logical name | description |
|---|---|---|
| mapping char filter | mapping | 根据配置的映射关系替换字符 |
| html strip char filter | html_strip | 去掉HTML元素 |
| pattern replace char filter | pattern_replace | 用正则表达式处理字符串 |
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