lucene 案例 搜索 取值

取值的时候  得到的 是document对象     将他转换成自己的对象  ， 然后 在读取

取值的类

package com.bw.lucene;

import java.nio.file.Paths;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
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.store.FSDirectory;

public class TestQuery {
    static String path = "E://lucene";

    public static void main(String[] args) throws Exception {
        //路径
        FSDirectory directory = FSDirectory.open(Paths.get(path));
        DirectoryReader reader = DirectoryReader.open(directory);
        IndexSearcher searcher = new IndexSearcher(reader);
        
        Analyzer analyzer = new StandardAnalyzer();
        //标准分词器   
        //没有业务逻辑 每个都分词一次
        QueryParser parser = new QueryParser("content",analyzer);
        Query query = parser.parse("hadoop");
        TopDocs search = searcher.search(query, 10);
        ScoreDoc[] scoreDocs = search.scoreDocs;
        for (ScoreDoc scoreDoc : scoreDocs) {
            int docID = scoreDoc.doc;
            Document doc = searcher.doc(docID);
            System.out.println(Artical.toAritical(doc));
        }
    }
}

 

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1.按分词查询的

 

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2.按范围查询

 3.查询所有

package com.bw.lucene;
import java.nio.file.Paths;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.LongPoint;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.queryparser.classic.MultiFieldQueryParser;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
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.FSDirectory;
public class TestQuery {
    static String path = "E://lucene";
    public static void main(String[] args) throws Exception {
        //booleanQuery();
        Query001();
    }
    //条件查询    //多个条件  有hadoop  或者女的
        public static void Query001() throws Exception {
            FSDirectory directory = FSDirectory.open(Paths.get(path));
            DirectoryReader reader = DirectoryReader.open(directory);
            IndexSearcher searcher = new IndexSearcher(reader);
            Analyzer analyzer = new StandardAnalyzer();
            QueryParser parser = new QueryParser("title", analyzer);
            Query query = parser.parse("title:hadoop or title:女");//多个条件  有hadoop  或者女的
            TopDocs search = searcher.search(query, 10);
            ScoreDoc[] scoreDocs = search.scoreDocs;
            for (ScoreDoc scoreDoc : scoreDocs) {
                int docID = scoreDoc.doc;
                Document doc = searcher.doc(docID);
                System.out.println(Artical.toAritical(doc));
            }        
        }
        
    
    //多条件查询  booleanQuery
    public static void booleanQuery() throws Exception {
        FSDirectory directory = FSDirectory.open(Paths.get(path));
        DirectoryReader reader = DirectoryReader.open(directory);
        IndexSearcher searcher = new IndexSearcher(reader);
        Analyzer analyzer = new StandardAnalyzer();
        String fields[] = {"title","content"};
        QueryParser parser = new MultiFieldQueryParser(fields, analyzer);
        Query query = parser.parse("hadoop女陆");
        TopDocs search = searcher.search(query, 10);
        ScoreDoc[] scoreDocs = search.scoreDocs;
        for (ScoreDoc scoreDoc : scoreDocs) {
            int docID = scoreDoc.doc;
            Document doc = searcher.doc(docID);
            System.out.println(Artical.toAritical(doc));
        }        
    }
    //条件查询   multiQuery()
    public static void multiQuery() throws Exception {
        FSDirectory directory = FSDirectory.open(Paths.get(path));
        DirectoryReader reader = DirectoryReader.open(directory);
        IndexSearcher searcher = new IndexSearcher(reader);
        Query query = new TermQuery(new Term("content","女"));
        Query query1 = new TermQuery(new Term("content","仙"));
        BooleanClause clause = new BooleanClause(query,BooleanClause.Occur.MUST);
        BooleanClause clause1 = new BooleanClause(query1,BooleanClause.Occur.MUST_NOT);
        BooleanQuery bquery = new BooleanQuery.Builder().add(clause).add(clause1).build();
        TopDocs search = searcher.search(query, 10);
        ScoreDoc[] scoreDocs = search.scoreDocs;
        for (ScoreDoc scoreDoc : scoreDocs) {
            int docID = scoreDoc.doc;
            Document doc = searcher.doc(docID);
            System.out.println(Artical.toAritical(doc));
        }        
    }
    
    //查询所有
    public static void queryAll() throws Exception {
        FSDirectory directory = FSDirectory.open(Paths.get(path));
        DirectoryReader reader = DirectoryReader.open(directory);
        IndexSearcher searcher = new IndexSearcher(reader);
        Query query = new MatchAllDocsQuery();
        TopDocs search = searcher.search(query, 10);
        ScoreDoc[] scoreDocs = search.scoreDocs;
        for (ScoreDoc scoreDoc : scoreDocs) {
            int docID = scoreDoc.doc;
            Document doc = searcher.doc(docID);
            System.out.println(Artical.toAritical(doc));
        }        
    }
    
    
    
    
    //按范围查找
        public static void queryRange() throws Exception {
            FSDirectory directory = FSDirectory.open(Paths.get(path));
            DirectoryReader reader = DirectoryReader.open(directory);
            IndexSearcher searcher = new IndexSearcher(reader);
            //Query query=LongPoint.newRangeQuery("id", 123, 124);//范围查找
            Query query = LongPoint.newExactQuery("id", 123);//等值查询
            TopDocs search = searcher.search(query, 10);
            ScoreDoc[] scoreDocs = search.scoreDocs;
            for (ScoreDoc scoreDoc : scoreDocs) {
                int docID = scoreDoc.doc;
                Document doc = searcher.doc(docID);
                System.out.println(Artical.toAritical(doc));
            }        
        }
    //分词 和不分词查询
    public static void queryParser() throws Exception {
        //路径
        FSDirectory directory = FSDirectory.open(Paths.get(path));
        DirectoryReader reader = DirectoryReader.open(directory);
        IndexSearcher searcher = new IndexSearcher(reader);
        
        Analyzer analyzer = new StandardAnalyzer();
        //标准分词器   
        //没有业务逻辑 每个都分词一次
        QueryParser parser = new QueryParser("author",analyzer);
        //url没有建立索引 所以查不出来
        Query query = parser.parse("川端康成");
        Query query1 = new TermQuery(new Term("title","舞女"));
        TopDocs search = searcher.search(query1, 10); 
        ScoreDoc[] scoreDocs = search.scoreDocs;
        for (ScoreDoc scoreDoc : scoreDocs) {
            int docID = scoreDoc.doc;
            Document doc = searcher.doc(docID);
            System.out.println(Artical.toAritical(doc));
        }        
    }
    
    
    
}