lucene索引的增、删、改

package com.hope.lucene;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.StoredField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.Term;
import org.apache.lucene.store.FSDirectory;
import org.junit.Before;
import org.junit.Test;
import org.wltea.analyzer.lucene.IKAnalyzer;

import java.io.File;

/**
 * @author newcityman
 * @date 2020/1/15 - 17:22
 */
public class IndexManager {
    private IndexWriter indexWriter;

    @Before
    public void init() throws Exception {
        //创建一个IndexWriter对象，需要使用IKAnalyzer作为分词器
       indexWriter = new IndexWriter(FSDirectory.open(new File("G:\\workspace_idea3\\lucene\\temp\\index").toPath()),
                new IndexWriterConfig(new IKAnalyzer()));
    }

    /**
     * 添加索引
     * @throws Exception
     */
    @Test
    public void addDocument() throws Exception {

        //创建一个Document对象
        Document document = new Document();
        //向Document对象中添加Field域
        document.add(new TextField("name", "新添加的文件", Field.Store.YES));
        document.add(new TextField("content", "新添加的文件内容", Field.Store.NO));
        document.add(new StoredField("path", "G:\\workspace_idea3\\lucene\\temp\\index"));
        //把文档写入索引库
        indexWriter.addDocument(document);
        //关闭索引库
        indexWriter.close();
    }

    /**
     * 删除索引
     * @throws Exception
     */
    @Test
    public void deleteAllDocument() throws Exception {
        //删除所有文档
        indexWriter.deleteAll();
        //关闭索引库
        indexWriter.close();
    }

    /**
     * 根据条件删除索引
     */
    @Test
    public void deleteDocumentByQuery() throws Exception{
        indexWriter.deleteDocuments(new Term("content","apache"));
        indexWriter.close();
    }

    /**
     * 修改索引
     */
    @Test
    public  void updateDocument() throws Exception{
        Document document = new Document();
        document.add(new TextField("name","更新后的内容1", Field.Store.YES));
        document.add(new TextField("name2","更新后的内容2", Field.Store.YES));
        document.add(new TextField("name3","更新后的内容3", Field.Store.YES));
        indexWriter.updateDocument(new Term("name","spring"),document);
        indexWriter.close();
    }
}