org.apache.lucene.search.spell 
Class SpellChecker

java.lang.Object  org.apache.lucene.search.spell.SpellChecker

Lucene拼写检查类

使用例子：

 SpellChecker spellchecker = new SpellChecker(spellIndexDirectory);// To index a field of a user index:spellchecker.indexDictionary(new LuceneDictionary(my_lucene_reader, a_field));// To index a file containing words:spellchecker.indexDictionary(new PlainTextDictionary(new File("myfile.txt")));String[] suggestions = spellchecker.suggestSimilar("misspelt", 5);

SpellChecker有三个构造方法，可以根据给定的Directory实例创建SpellChecker对象进行后续操作；

PlainTextDictionary实现了Dictionary接口，并提供3个构造方法，参数分别为：File、InputStream、Reader

上面例子中根据一个文本文件创建PlainTextDirectory字典，该文本文件的格式为每一行包含一个词，如：

word1
word2
word3

其他：FileDictionary, HighFrequencyDictionary, LuceneDictionary

SpellChecker方法：

String [] suggestSimilar（String word,int numSug）

参数：

word-需要检查的词

numSug-返回的suggest词数

其他的：String [] suggestSimilar（...），可以根据精度等进行，详情请参考官方文档；

完整代码示例：

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.search.spell.PlainTextDictionary;
import org.apache.lucene.search.spell.SpellChecker;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.Version;
import org.wltea.analyzer.lucene.IKAnalyzer;import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;public class SpellCheckerTest {private static String filepath = "C:\\Users\\Mr_Tank_\\Desktop\\BaseTest\\dictionaryfile.txt";private Document document;private Directory directory;private IndexWriter indexWriter;private SpellChecker spellchecker;private IndexReader indexReader;private IndexSearcher indexSearcher;private IndexWriterConfig getConfig() {return new IndexWriterConfig(Version.LUCENE_43, new IKAnalyzer(true));}private IndexWriter getIndexWriter() {directory = new RAMDirectory();try {return new IndexWriter(directory, getConfig());} catch (IOException e) {e.printStackTrace();return null;}}/*** Create index for test** @param content* @throws IOException*/public void createIndex(String content) {indexWriter = getIndexWriter();document = new Document();document.add(new TextField("content", content, Field.Store.YES));try {indexWriter.addDocument(document);indexWriter.commit();indexWriter.close();} catch (IOException e) {e.printStackTrace();}}public ScoreDoc[] gethits(String content) {try {indexReader = DirectoryReader.open(directory);indexSearcher = new IndexSearcher(indexReader);QueryParser parser = new QueryParser(Version.LUCENE_43, "content", new IKAnalyzer(true));Query query = parser.parse(content);TopDocs td = indexSearcher.search(query, 1000);return td.scoreDocs;} catch (Exception e) {e.printStackTrace();return null;}}/*** @param scoreDocs* @return* @throws IOException*/public List<Document> getDocumentList(ScoreDoc[] scoreDocs) throws IOException {List<Document> documentList = null;if (scoreDocs.length >= 1) {documentList = new ArrayList<Document>();for (int i = 0; i < scoreDocs.length; i++) {documentList.add(indexSearcher.doc(scoreDocs[i].doc));}}return documentList;}public String[] search(String word, int numSug) {directory = new RAMDirectory();try {spellchecker = new SpellChecker(directory);spellchecker.indexDictionary(new PlainTextDictionary(new File(filepath)), getConfig(), true);return getSuggestions(spellchecker, word, numSug);} catch (IOException e) {e.printStackTrace();return null;}}private String[] getSuggestions(SpellChecker spellchecker, String word, int numSug) throws IOException {return spellchecker.suggestSimilar(word, numSug);}public static void main(String[] args) throws IOException {SpellCheckerTest spellCheckerTest = new SpellCheckerTest();spellCheckerTest.createIndex("开源中国-找到您想要的开源项目，分享和交流");spellCheckerTest.createIndex("CSDN-全球最大中文IT社区");String word = "开园中国";/*ScoreDoc[] scoreDocs = spellCheckerTest.gethits(word);List<Document> documentList = spellCheckerTest.getDocumentList(scoreDocs);if (documentList.size() >= 1) {for (Document d : documentList) {System.out.println("搜索结果：" + d.get("content"));}}*/String[] suggest = spellCheckerTest.search(word, 5);if (suggest != null && suggest.length >= 1) {for (String s : suggest) {System.out.println("您是不是要找：" + s);}} else {System.out.println("拼写正确");}}
}

dictionaryfile.txt：

中华人民共和国
开源中国
开源社区
Lucene
拼写检查
Lucene4.3.1