lucene的搜索，TermQuery，TermRangeQuery，NumericRangeQuery

SearchUtil.java
import java.io.File;
import java.io.IOException;
import java.text.ParseException;
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.CorruptIndexException;
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.NumericRangeQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TermRangeQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.store.LockObtainFailedException;
import org.apache.lucene.util.Version;


public class SearchUtil {
    private String[] ids = {"1","2","3","4","5","6"};
    private String[] emails = {"[email protected]","[email protected]","[email protected]","[email protected]","[email protected]","[email protected]"};
    private String[] content ={
            "Welcome to Kenan my home",
            "Hello Kenan ",
            "Good morning",
            "Are you OK?",
            "Yeah hahahahahahaha Kenan",
            "I like foot ball"
    };
    private int[] attachs = {1,4,6,2,3,8};
    private Date[] dates = null;
    private String[] names = {"5555","333","44","111","222","666"};
    //詞典
    private Directory directory = null;
    //寫入筆
    private IndexWriter writer = null;
    //文檔對象
    private Document doc = null;
    //讀取對象
    private IndexReader reader = null;
    private IndexSearcher searcher = null;
    private void datesInit() {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        dates = new Date[6];
        try {
            dates[0] = sdf.parse("2010-12-01");
            dates[1] = sdf.parse("2011-12-01");
            dates[2] = sdf.parse("2001-12-01");
            dates[3] = sdf.parse("2013-12-01");
            dates[4] = sdf.parse("2003-12-01");
            dates[5] = sdf.parse("2014-12-01");
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    public SearchUtil(){
        datesInit();
        try {
            directory = FSDirectory.open(new File("d:/lucene/index01"));
            buildIndex();
            this.getSearcher();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    /**
     * 構建索引
     */
    public void buildIndex(){
        try {
            writer = new IndexWriter(directory,new IndexWriterConfig(Version.LUCENE_35, new StandardAnalyzer(Version.LUCENE_35)));
            for(int i=0;i<6;i++){
                doc = new Document();
                doc.add(new Field ("id",ids[i],Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
                doc.add(new Field("email",emails[i],Field.Store.YES,Field.Index.NOT_ANALYZED));
                doc.add(new Field("content",this.content[i],Field.Store.NO,Field.Index.ANALYZED));
                doc.add(new Field("name",this.names[i],Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
                //給數字加索引
                doc.add(new NumericField("attach", Field.Store.YES,true).setIntValue(attachs[i]));
                //給日期加索引
                doc.add(new NumericField("date",Field.Store.YES,true).setLongValue(dates[i].getTime()));
                writer.addDocument(doc);
            }
        } catch (CorruptIndexException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (LockObtainFailedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            if(writer != null){
                try {
                    writer.close();
                } catch (CorruptIndexException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
    public IndexSearcher getSearcher(){
        try {
            if(reader == null){
                reader = IndexReader.open(directory);
            }else{
                IndexReader ir = IndexReader.openIfChanged(reader);
                if(ir!=null){
                    reader.close();
                    reader = ir;
                }
            }
            searcher = new IndexSearcher(reader);
            return searcher;
        } catch (CorruptIndexException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }
    public void termQuery(String field,String name,int num){
        Query query = new TermQuery(new Term(field, name));
        try {
            TopDocs tds = this.searcher.search(query, num);
            System.out.println("查詢到的結果數:"+tds.totalHits);
            for(ScoreDoc sd : tds.scoreDocs){
                doc = this.searcher.doc(sd.doc);
                System.out.println("id:"+doc.get("id")+"---"+"name:"+doc.get("name")+"---"+"attachs:"+doc.get("attach")+"---"+"email:"+doc.get("email"));
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                this.searcher.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
    /**
     *
     * @param field 要查詢的域
     * @param lowerTerm  開始的字符
     * @param upperTerm 結束的字符
     * @param num 查詢的top個數
     * @param includeLower 是否包含開始的邊界
     * @param includeUpper 是否包含結束的邊界
     */
    public void termRangeQuery(String field,String lowerTerm,String upperTerm,int num,boolean includeLower, boolean includeUpper){

        Query query = new TermRangeQuery(field, lowerTerm, upperTerm, includeLower,includeUpper);
        try {
            TopDocs tds = this.searcher.search(query, num);
            System.out.println("查詢到的結果數:"+tds.totalHits);
            for(ScoreDoc sd : tds.scoreDocs){
                doc = this.searcher.doc(sd.doc);
                System.out.println("id:"+doc.get("id")+"---"+"name:"+doc.get("name")+"---"+"attachs:"+doc.get("attach")+"---"+"email:"+doc.get("email"));
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                this.searcher.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
    public void queryByNumericRange(String field,int min,int max,int num, boolean minInclusive, boolean maxInclusive){
        Query query = NumericRangeQuery.newIntRange(field, min, max, minInclusive, maxInclusive);
        try {
            TopDocs tds = this.searcher.search(query, num);
            System.out.println("查詢到的結果數:"+tds.totalHits);
            for(ScoreDoc sd : tds.scoreDocs){
                doc = this.searcher.doc(sd.doc);
                System.out.println("id:"+doc.get("id")+"---"+"name:"+doc.get("name")+"---"+"attachs:"+doc.get("attach")+"---"+"email:"+doc.get("email"));
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                this.searcher.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}

TestSearchUtil.java
import org.junit.BeforeClass;
import org.junit.Test;


public class TestSearchUtil {

    static SearchUtil su ;
    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
        su = new SearchUtil();
    }

    @Test
    public void testTermQuery() {
        su.termQuery("content", "hello", 5);
    }
    @Test
    public void testTermRangeQuery(){
        su.termRangeQuery("name", "2", "4", 5, false, false);
    }
    @Test
    public void testQueryByNumericRange(){
        su.queryByNumericRange("id", 3, 4, 10, false, true);
    }

}

 

本文出自 “Kenan_ITBlog” 博客，請務必保留此出處http://soukenan.blog.51cto.com/5130995/1121975