lucene实现分页代码

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原创最新推荐文章于 2026-02-12 10:59:49 发布 3k 阅读 AI 写同款· GEO 优化 ›

全文检索 Lucene(3) 看完前两篇博客之后，想必大家对于Lucene的使用都有了一个比较清晰的认识了。如果对Lucene的知识点还是有点模糊的话，个人建议还是先看看这两篇文章。全文检索 Lucene（1）全文检索 Lucene（2）下面来谈一谈使用Lucene查询的分页机制。分页原理分页就是为了给用户展现一个逻辑性更强，页面更加紧凑的视图效果。相比于数据库实现的分页，Lucene就显得有点逊色了。毕竟数据库是原生支阅读详情

package cn.csdn.hr.domain;
import java.io.Serializable;

/**
*
* Title: 
* Description: 
* Copyright: Copyright chenhj 2012
* Company: csdn
* @author <a href="mailto:chenhj@youkuaiyun.com">Project Group</a>
*/
public class Post implements Serializable{

 /**
 *
 */
 private static final long serialVersionUID = 1L;
 private Integer id;
 private String title;
 private String content;
 public Post() {
 super();
 // TODO Auto-generated constructor stub
 }
 public Post(Integer id, String title, String content) {
 super();
 this.id = id;
 this.title = title;
 this.content = content;
 }
 public Integer getId() {
 return id;
 }
 public void setId(Integer id) {
 this.id = id;
 }
 public String getTitle() {
 return title;
 }
 public void setTitle(String title) {
 this.title = title;
 }
 public String getContent() {
 return content;
 }
 public void setContent(String content) {
 this.content = content;
 }
 @Override
 public String toString() {
 return "Article [id=" + id + ", title=" + title + ", content="
 + content + "]";
 }

}

package cn.csdn.hr.util;

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

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.SimpleFSDirectory;
import org.apache.lucene.util.Version;

public class config {
private static Directory directory=null;
private static Analyzer analyzer=null;
static{


  try {
   directory=new SimpleFSDirectory(new File("./index"));
   analyzer= new StandardAnalyzer(Version.LUCENE_36);
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
}
public static Directory getDirectory() {
  return directory;
}
public static Analyzer getAnalyzer() {
  return analyzer;
}

}

//查询分页

public List<Post> findNowPageInfo(String searchTxt, Integer nowPage,
 Integer pageSize) {
 // TODO Auto-generated method stub
 //声明返回值
 List<Post> posts=new ArrayList<Post>();
 //创建索引的查询对象
 IndexSearcher indexSearcher=null;
 //创建索引的读取对象
 IndexReader indexReader=null;

 try {
 //读取的文件
 indexReader=IndexReader.open(config.getDirectory());
 //查找读取的文件
 indexSearcher=new IndexSearcher(indexReader);
 //查询的解析器对象
 QueryParser parser=new QueryParser(Version.LUCENE_36,"title",config.getAnalyzer());
 //查询解析器对象调用解析的方法得到一个查询的对象
 Query query=parser.parse(searchTxt);
 //执行查询
 TopDocs topDocs=indexSearcher.search(query, (nowPage+1)*pageSize);
 //取出结束位置的数据
 int end=Math.min(topDocs.totalHits, (nowPage-1)*pageSize+pageSize);
 for(int i=0;i<topDocs.totalHits;i++){
 Document doc=indexSearcher.doc(topDocs.scoreDocs[i].doc);
 Post post=new Post();
 post.setId(Integer.parseInt(doc.get("id")));
 post.setTitle(doc.get("title"));
 post.setContent(doc.get("content"));
 posts.add(post);



 }



 } catch (Exception e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }finally {
 if (indexSearcher != null) {
 try {
 indexSearcher.close();
 } catch (IOException e) {
 e.printStackTrace();
 }
 }

   if (indexReader != null) {
    try {
     indexReader.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }
  }


  return posts;
}