Lucene TermRangeQuery類

1. Lucene TermRangeQuery類

Lucene排序

1. Lucene排序

Lucene Query類

1. Lucene Query類

Lucene搜索操作

1. Lucene搜索操作

Lucene TokenStream

1. Lucene TokenStream

Lucene IndexWriter類

1. Lucene IndexWriter類

Lucene Term類

1. Lucene Term類

Lucene Token

1. Lucene Token

Lucene索引操作

1. Lucene索引操作

Lucene Field選項

1. Lucene Field選項

Lucene BooleanQuery類

1. Lucene BooleanQuery類

Lucene StandardAnalyzer類

1. Lucene StandardAnalyzer類

Lucene字段

1. Lucene字段

Lucene添加文檔操作

1. Lucene添加文檔操作

Lucene環(huán)境設(shè)置

1. Lucene環(huán)境設(shè)置

Lucene Searching類

1. Lucene Searching類

Lucene StopAnalyzer類

1. Lucene StopAnalyzer類

Lucene第一個應(yīng)用程序

1. Lucene第一個應(yīng)用程序

Lucene MatchAllDocsQuery類

1. Lucene MatchAllDocsQuery類

Lucene IndexSearcher類

1. Lucene IndexSearcher類

Lucene索引類

1. Lucene索引類

Lucene更新文檔操作

1. Lucene更新文檔操作

Lucene教程

1. Lucene教程

Lucene PrefixQuery類

1. Lucene PrefixQuery類

Lucene Analyzer類

1. Lucene Analyzer類

Lucene TopDocs類

1. Lucene TopDocs類

Lucene TermQuery類

1. Lucene TermQuery類

Lucene文檔

1. Lucene文檔

Lucene查詢編程

1. Lucene查詢編程

Lucene WildcardQuery類

1. Lucene WildcardQuery類

Lucene WhitespaceAnalyzer

1. Lucene WhitespaceAnalyzer

Lucene SimpleAnalyzer類

1. Lucene SimpleAnalyzer類

Lucene目錄

Lucene刪除文檔操作

1. Lucene刪除文檔操作

Lucene索引過程

1. Lucene索引過程

Lucene FuzzyQuery類

1. Lucene FuzzyQuery類

Lucene PhraseQuery類

1. Lucene PhraseQuery類

Lucene分析

1. Lucene分析

Lucene PrefixQuery類

PrefixQuery用于匹配其索引開始以指定的字符串的文檔。

類聲明

以下是org.apache.lucene.search.PrefixQuery類的聲明：

public class PrefixQuery
   extends MultiTermQuery

類的構(gòu)造函數(shù)

S.N.	構(gòu)造函數(shù)和說明
1	PrefixQuery(Term prefix) 構(gòu)造的開始前綴詞的查詢。

類方法

S.N.	方法及說明
1	boolean equals(Object o) 返回true如果o為等于當(dāng)前對象。
2	protected FilteredTermEnumgetEnum(IndexReader reader) 構(gòu)造所使用的枚舉，擴大模式詞條
3	Term getPrefix() 返回此查詢的前綴。
4	int hashCode() 返回此對象的哈希碼值。
5	String toString(String field) 打印這個查詢的一個用戶可讀的版本。

繼承的方法

這個類繼承了以下類方法：

org.apache.lucene.search.MultiTermQuery
org.apache.lucene.search.Query
java.lang.Object

使用

private void searchUsingPrefixQuery(String searchQuery)
   throws IOException, ParseException{
   searcher = new Searcher(indexDir);
   long startTime = System.currentTimeMillis();
   //create a term to search file name
   Term term = new Term(LuceneConstants.FILE_NAME, searchQuery);
   //create the term query object
   Query query = new PrefixQuery(term);
   //do the search
   TopDocs hits = searcher.search(query);
   long endTime = System.currentTimeMillis();

   System.out.println(hits.totalHits +
      " documents found. Time :" + (endTime - startTime) + "ms");
   for(ScoreDoc scoreDoc : hits.scoreDocs) {
      Document doc = searcher.getDocument(scoreDoc);
      System.out.println("File: "+ doc.get(LuceneConstants.FILE_PATH));
   }
   searcher.close();
}

Example Application

Let us create a test Lucene application to test search using PrefixQuery.

步驟	描述
1	Create a project with a name LuceneFirstApplication under a packagecom.yiibai.lucene as explained in the Lucene - First Application chapter. You can also use the project created in Lucene - First Application chapter as such for this chapter to understand searching process.
2	Create LuceneConstants.java and Searcher.java as explained in the Lucene - First Applicationchapter. Keep rest of the files unchanged.
3	Create LuceneTester.java as mentioned below.
4	Clean and Build the application to make sure business logic is working as per the requirements.

LuceneConstants.java

This class is used to provide various constants to be used across the sample application.

package com.yiibai.lucene;

public class LuceneConstants {
   public static final String CONTENTS="contents";
   public static final String FILE_NAME="filename";
   public static final String FILE_PATH="filepath";
   public static final int MAX_SEARCH = 10;
}

Searcher.java

This class is used to read the indexes made on raw data and searches data using lucene library.

package com.yiibai.lucene;

import java.io.File;
import java.io.IOException;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.上一篇：Lucene第一個應(yīng)用程序下一篇：Lucene SimpleAnalyzer類