grails - Grails 中的重音不敏感搜索

Question

如何使用 Grails Searchable Plugin 进行全文搜索口音不敏感？

Answer 1

我在 Peter Ledbrook's post 的帮助下解决了这个问题，但是需要一些努力:

由于最新的可搜索插件使用不包含 ASCIIFoldingFilter 的 Lucene 2.4.1 (自 2.9.0 起可用)和 ISOLatin1AccentFilter不支持多种语言 我为 stripping accents 创建了自定义过滤器:

    import java.text.Normalizer
    import org.apache.lucene.analysis.Token
    import org.apache.lucene.analysis.TokenFilter
    import org.apache.lucene.analysis.TokenStream

    class StripAccentsFilter extends TokenFilter {

        StripAccentsFilter(TokenStream input)   {
            super(input)
        }

        public final Token next(Token reusableToken) {

            assert reusableToken

            Token nextToken = input.next(reusableToken)
            if (nextToken) {
                nextToken.setTermBuffer(Normalizer.normalize(nextToken.termBuffer() as String, Normalizer.Form.NFD)
                        .replaceAll("\\p{InCombiningDiacriticalMarks}+", ""))
                return nextToken
            }
            return null
        }
    }

和相应的过滤器提供程序:

    import org.apache.lucene.analysis.TokenStream
    import org.compass.core.config.CompassSettings
    import org.compass.core.lucene.engine.analyzer.LuceneAnalyzerTokenFilterProvider

    class StripAccentsFilterProvider implements LuceneAnalyzerTokenFilterProvider {

        public void configure(CompassSettings paramCompassSettings) {
        }

        public TokenStream createTokenFilter(TokenStream paramTokenStream) {
            return new StripAccentsFilter(paramTokenStream)
        }

    }

现在您需要做的就是在可搜索插件(grails-app/conf/Searchable.groovy)的配置中注册这个过滤器提供者:

compassSettings = [
    'compass.engine.analyzer.default.filters': 'stripAccents',
    'compass.engine.analyzer.search.filters': 'stripAccents',
    'compass.engine.analyzerfilter.stripAccents.type': 'StripAccentsFilterProvider' 
]