org.apache.lucene.analysis.cjk (Lucene 3.6.2 API)
Keywords: org.apache.lucene.analysis.cjk package

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## Package org.apache.lucene.analysis.cjk

Analyzer for Chinese, Japanese, and Korean, which indexes bigrams (overlapping groups of two adjacent Han characters).

See:
Description

Class Summary
CJKAnalyzer | An `Analyzer` that tokenizes text with `StandardTokenizer`, normalizes content with `CJKWidthFilter`, folds case with `LowerCaseFilter`, forms bigrams of CJK with `CJKBigramFilter`, and filters stopwords with `StopFilter`
CJKBigramFilter | Forms bigrams of CJK terms that are generated from StandardTokenizer or ICUTokenizer.
CJKTokenizer | Deprecated. Use StandardTokenizer, CJKWidthFilter, CJKBigramFilter, and LowerCaseFilter instead.
CJKWidthFilter | A `TokenFilter` that normalizes CJK width differences: Folds fullwidth ASCII variants into the equivalent basic latin Folds halfwidth Katakana variants into the equivalent kana

## Package org.apache.lucene.analysis.cjk Description

Analyzer for Chinese, Japanese, and Korean, which indexes bigrams (overlapping groups of two adjacent Han characters).

Three analyzers are provided for Chinese, each of which treats Chinese text in a different way.

- ChineseAnalyzer (in the analyzers/cn package): Index unigrams (individual Chinese characters) as a token.
- CJKAnalyzer (in this package): Index bigrams (overlapping groups of two adjacent Chinese characters) as tokens.
- SmartChineseAnalyzer (in the analyzers/smartcn package): Index words (attempt to segment Chinese text into words) as tokens.

Example phrase： "我是中国人"

1. ChineseAnalyzer: 我－是－中－国－人
2. CJKAnalyzer: 我是－是中－中国－国人
3. SmartChineseAnalyzer: 我－是－中国－人

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