Lucene的工具类

川长思鸟来 2022-01-29 14:39 178阅读 0赞

import org.apache.lucene.analysis.Analyzer;
    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.store.Directory;
    import org.apache.lucene.store.FSDirectory;
    import org.wltea.analyzer.lucene.IKAnalyzer;
    
    import java.io.IOException;
    import java.nio.file.Path;
    import java.nio.file.Paths;
    import java.util.Properties;
    
    //枚举单例方式创建Lucene的工具类
    public enum  LuceneUtils {
    
        INSTANCE;
    
        private LuceneUtils(){}
    
        private static String indexPath;
    
        public Analyzer analyzer = new IKAnalyzer();
        //静态库为静态成员变量初始化值
        static{
            try {
                Properties properties = new Properties();
                properties.load(LuceneUtils.class.getClassLoader().getResourceAsStream("lucene.properties"));
                indexPath = properties.getProperty("lucenen.indexpath");
            } catch (IOException e) {
                e.printStackTrace();
            }
    
        }
    
        /**
         * 获取IndexWriter
         * @return
         * @throws IOException
         */
        public IndexWriter getIndexWriter() throws IOException {
            //获取IndexWriter
            Directory directory = getDirectory();
            IndexWriterConfig config = new IndexWriterConfig(analyzer);
            IndexWriter indexWriter = new IndexWriter(directory,config);
            return indexWriter;
        }
    
        /**
         * 获取IndexReader
         * @return
         * @throws IOException
         */
        public IndexReader getIndexReader() throws IOException {
            Directory directory = getDirectory();
            IndexReader reader = DirectoryReader.open(directory);
            return reader;
        }
    
        /**
         * 获取Directory
         * @return
         * @throws IOException
         */
        private Directory getDirectory() throws IOException {
            Path path = Paths.get(indexPath);
            return FSDirectory.open(path);
        }
    
    }