Introduction to Lucene 3.6.2 (2) crud for index files

Package com.jadyer.lucene;  
Import Java.io.File;  
Import java.io.IOException;  
Import Java.text.SimpleDateFormat;  
      
Import Java.util.Date;  
Import Org.apache.lucene.analysis.standard.StandardAnalyzer;  
Import org.apache.lucene.document.Document;  
Import Org.apache.lucene.document.Field;  
Import Org.apache.lucene.document.NumericField;  
Import Org.apache.lucene.index.IndexReader;  
Import Org.apache.lucene.index.IndexWriter;  
Import Org.apache.lucene.index.IndexWriterConfig;  
Import Org.apache.lucene.index.Term;  
Import Org.apache.lucene.search.IndexSearcher;  
Import Org.apache.lucene.search.Query;  
Import Org.apache.lucene.search.ScoreDoc;  
Import Org.apache.lucene.search.TermQuery;  
Import Org.apache.lucene.search.TopDocs;  
Import Org.apache.lucene.store.Directory;  
Import Org.apache.lucene.store.FSDirectory;  
      
Import org.apache.lucene.util.Version; /** * "Lucene3.6.2 Introductory Series" section No. 02 _ crud * @see for index files ================================================================================================ ============= * @see Lucene website: http://lucene.apache.org * @see Lu Cene Download: http://archive.apache.org/dist/lucene/java/* @see Lucene Documentation: http://wiki.apache.org/lucene-java/* @see = = ========================================================================================== ============= * @see View participle information using Luke (http://code.google.com/p/luke/) * @see 1) Introduction: Each Lucene version will have a corresponding Luke file * @see 2) Open: Double-click or Java-jar lukeall-3. 5.0.jar * @see 3) Select the index of the storage directory and click OK * @see 7) If our index changes, you can click on the right side of the re-open button reload the index * @see 4) Luke interface in the lower right corner of the top ranking Terms window The display is the word segmentation information. Where the rank column represents the frequency * @see 5) The documents information is displayed in the Documents tab of the Luke menu, and we can browse by the document serial number (click the arrow to the left and right) * @see 6) The Search tab under the Luke menu can be based on our loss Into the expression to look up the contents of the document * @see such as in the Enter search expression here: input Content:my, and then click on the right side of a large black word Search button can be * @see =============== ================================================================================= ============= * @create June 30, 4:34:09 PM * @authoR Xuan Yu             from:http://www.bianceng.cn writer.deletedocuments (New Term ("id", "1"));  
        Deletes the document with ID 1 in the indexed document}catch (Exception e) {e.printstacktrace ();  
                }finally{if (null!= writer) {try {writer.close ();  
                catch (IOException CE) {ce.printstacktrace (); /** * Restore Index * @see recommended discard/@Depreca  
        Ted public void Undeleteindex () {Indexreader reader = null;  try {//indexreader.open (directory) Indexreader The default readonly=true at this time, and you should specify a reader that is not read-only when you restore the index  
            Indexreader.open (directory, false); Deprecated. Write support is removed in Lucene 4.0.  
            There'll is no replacement for this method.  
        Reader.undeleteall ();  
catch (Exception e) {e.printstacktrace ();        }finally{if (null!= reader) {try {reader.close ();  
                catch (IOException e) {e.printstacktrace (); }  
            }  
        }  
    }  
}