在lucene 6.2.0中使用SynonymMap,可以通过以下步骤实现:
- 导入必要的类和包:import org.apache.lucene.analysis.synonym.SynonymMap;
import org.apache.lucene.analysis.synonym.SynonymMap.Builder;
import org.apache.lucene.analysis.synonym.WordnetSynonymParser;
import org.apache.lucene.util.CharsRef;
import org.apache.lucene.util.CharsRefBuilder;
import org.apache.lucene.util.CharsRefIterator;
import org.apache.lucene.util.CharsRefBuilder;
import org.apache.lucene.util.CharsRef;
import org.apache.lucene.util.CharsRefBuilder;
- 创建SynonymMap对象:SynonymMap.Builder builder = new SynonymMap.Builder(true);
- 定义同义词规则:String synonymRules = "happy, joyful, glad";
- 解析同义词规则并添加到SynonymMap中:WordnetSynonymParser parser = new WordnetSynonymParser(true, true, new StandardAnalyzer());
parser.parse(new StringReader(synonymRules));
builder.add(parser.build());
- 构建SynonymMap:SynonymMap synonymMap = builder.build();
- 使用SynonymMap进行同义词替换:Analyzer analyzer = new Analyzer() {
@Override
protected TokenStreamComponents createComponents(String fieldName) {
Tokenizer tokenizer = new StandardTokenizer();
TokenStream tokenStream = new SynonymFilter(tokenizer, synonymMap, true);
return new TokenStreamComponents(tokenizer, tokenStream);
}
};
String text = "I am happy";
TokenStream tokenStream = analyzer.tokenStream("field", new StringReader(text));
CharTermAttribute charTermAttribute = tokenStream.addAttribute(CharTermAttribute.class);
tokenStream.reset();
while (tokenStream.incrementToken()) {
System.out.println(charTermAttribute.toString());
}
tokenStream.end();
tokenStream.close();
以上代码演示了如何在lucene 6.2.0中使用SynonymMap进行同义词替换。首先创建一个SynonymMap.Builder对象,然后定义同义词规则,解析规则并添加到SynonymMap中,最后构建SynonymMap。接下来,创建一个自定义的Analyzer,使用SynonymFilter进行同义词替换。最后,将待处理的文本传入Analyzer中,通过TokenStream逐个获取替换后的词语。
这是一个基本的示例,你可以根据具体需求进行调整和扩展。如果你想了解更多关于lucene的内容,可以参考腾讯云的文档:lucene 6.2.0官方文档。