使用LuceneUtil工具类，完成CURD操作

package loaderman.curd;

import java.util.ArrayList;
import java.util.List;

import loaderman.entity.Article;
import loaderman.util.LuceneUtil;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.queryParser.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.junit.Test;

/**
 * 增删改查索引库
 * @author AdminTC
 */
public class ArticleDao {
    @Test
    public void add() throws Exception{
        Article article = new Article(1,"培训","传智是一家java培训机构");
        Document document = LuceneUtil.javabean2document(article);
        IndexWriter indexWriter = new IndexWriter(LuceneUtil.getDirectory(),LuceneUtil.getAnalyzer(),LuceneUtil.getMaxFieldLength());
        indexWriter.addDocument(document);//核心
        indexWriter.close();
    }
    @Test
    public void addAll() throws Exception{
        IndexWriter indexWriter = new IndexWriter(LuceneUtil.getDirectory(),LuceneUtil.getAnalyzer(),LuceneUtil.getMaxFieldLength());

        Article article1 = new Article(1,"培训","传智是一家java培训机构");
        Document document1 = LuceneUtil.javabean2document(article1);
        indexWriter.addDocument(document1);

        Article article2 = new Article(2,"培训","传智是一家net培训机构");
        Document document2 = LuceneUtil.javabean2document(article2);
        indexWriter.addDocument(document2);

        Article article3 = new Article(3,"培训","传智是一家php培训机构");
        Document document3 = LuceneUtil.javabean2document(article3);
        indexWriter.addDocument(document3);

        Article article4 = new Article(4,"培训","传智是一家ios培训机构");
        Document document4 = LuceneUtil.javabean2document(article4);
        indexWriter.addDocument(document4);

        Article article5 = new Article(5,"培训","传智是一家ui培训机构");
        Document document5 = LuceneUtil.javabean2document(article5);
        indexWriter.addDocument(document5);

        Article article6 = new Article(6,"培训","传智是一家c++培训机构");
        Document document6 = LuceneUtil.javabean2document(article6);
        indexWriter.addDocument(document6);

        Article article7 = new Article(7,"培训","传智是一家seo培训机构");
        Document document7 = LuceneUtil.javabean2document(article7);
        indexWriter.addDocument(document7);

        indexWriter.close();
    }
    @Test
    public void update() throws Exception{
        Article newArticle = new Article(1,"培训","传智是一家JAVA培训机构");
        Document document = LuceneUtil.javabean2document(newArticle);
        IndexWriter indexWriter = new IndexWriter(LuceneUtil.getDirectory(),LuceneUtil.getAnalyzer(),LuceneUtil.getMaxFieldLength());
        //更新id=7的document对象
        /*
         * 参数一：term表示需要更新的document对象，id表示document对象中的id属性,7表示该id属性的值
         * 参数二：新的document对象
         */
        indexWriter.updateDocument(new Term("id","1"),document);//核心
        indexWriter.close();
    }
    @Test
    public void delete() throws Exception{
        IndexWriter indexWriter = new IndexWriter(LuceneUtil.getDirectory(),LuceneUtil.getAnalyzer(),LuceneUtil.getMaxFieldLength());
        indexWriter.deleteDocuments(new Term("id","2"));//核心
        indexWriter.close();
    }
    @Test
    public void deleteAll() throws Exception{
        IndexWriter indexWriter = new IndexWriter(LuceneUtil.getDirectory(),LuceneUtil.getAnalyzer(),LuceneUtil.getMaxFieldLength());
        indexWriter.deleteAll();//核心
        indexWriter.close();
    }

    @Test
    public void findAllByKeywords() throws Exception{
        String keywords = "培";
        List<Article> articleList = new ArrayList<Article>();
        QueryParser queryParser = new QueryParser(LuceneUtil.getVersion(),"content",LuceneUtil.getAnalyzer());
        Query query = queryParser.parse(keywords);
        IndexSearcher indexSearcher = new IndexSearcher(LuceneUtil.getDirectory());
        TopDocs topDocs = indexSearcher.search(query,100);//核心
        for(int i=0;i<topDocs.scoreDocs.length;i++){
            ScoreDoc scoreDoc = topDocs.scoreDocs[i];
            int no = scoreDoc.doc;
            Document document = indexSearcher.doc(no);
            Article article = (Article)LuceneUtil.document2javabean(document,Article.class);
            articleList.add(article);
        }
        for(Article a : articleList){
            System.out.println( a );
        }
    }
}