lucene5.3.1 maven + 增删改查 详细注释

注:本示例是基于lucene5.3.1版本，其他版本要做相应修改

step 1.invoke lucene in maven

	
		org.apache.lucene
		lucene-core
		5.3.1
	
	
		org.apache.lucene
		lucene-analyzers-common
		5.3.1
	
	
		org.apache.lucene
		lucene-queryparser
		5.3.1
	
	
	
		org.apache.lucene
		lucene-highlighter
		5.3.1
	
	
	
	    org.apache.lucene
	    lucene-analyzers-smartcn
	    5.3.1
	
	
	
		commons-io
		commons-io
		2.4
	

step 2.properties

首先，假如如下这些数据是读取到的文档数据

String[] ids = { "1", "2", "3", "4", "5", "6" };

	String[] names = { "zs", "ls", "ww", "hl", "wq", "bb" };

	String[] emails = { "[email protected]", "[email protected]", "[email protected]", "[email protected]", "[email protected]", "[email protected]" };

	String[] contents = {
			"She had been shopping with her Mom in Wal-Mart. She must have been 6 years old, this beautiful brown haired, freckle-faced image of innocence. It was pouring outside. The kind of rain that gushes over the top of rain gutters, so much in a hurry to hit the Earth, it has no time to flow down the spout.",
			"We all stood there under the awning and just inside the door of the Wal-Mart. We all waited, some patiently, others irritated, because nature messed up their hurried day. I am always mesmerized by rainfall. I get lost in the sound and sight of the heavens washing away the dirt and dust of the world. Memories of running, splashing so carefree as a child come pouring in as a welcome reprieve from the worries of my day.",
			"Her voice was so sweet as it broke the hypnotic trance we were all caught in, Mom, let's run through the rain. she said.",
			"The entire crowd stopped dead silent. I swear you couldn't hear anything but the rain. We all stood silently. No one came or left in the next few minutes. Mom paused and thought for a moment about what she would say.",
			"Now some would laugh it off and scold her for being silly. Some might even ignore what was said. But this was a moment of affirmation in a young child's life. Time when innocent trust can be nurtured so that it will bloom into faith.",
			"To everything there is a season and a time to every purpose under heaven. I hope you still take the time to run through the rain." };

创建directory(字典)和(Analyzer)分词器

	创建directory(字典)和(Analyzer)分词器
	//1.创建Directory 
	//索引存放目录
	String indexPath = "E:\\DEVELOPER\\Workspaces\\eclipse13\\lucene\\luceneIndex\\";
	Directory dir = LuceneUtils.openFSDirectory(indexPath);
	//也可以存放到内存 
	//Directory  directory = new RAMDirectory();
	//2.创建分词器
	Analyzer analyzer = new SmartChineseAnalyzer();

增删改查:

	/****************************************** 增加索引(Create) *********************************************/
	public void createIndex() {
		//3.创建IndexWriterConfig
		IndexWriterConfig iwc = new IndexWriterConfig(analyzer);
		//4.创建IndexWriter
		IndexWriter iw = null;
		try {
			// 创建writer
			iw = new IndexWriter(directory, iwc);
			for (int i = 0; i < ids.length; i++) {
				Document doc = new Document();
				doc.add(new StringField("id", ids[i], Field.Store.YES));
				doc.add(new StringField("name", names[i], Field.Store.YES));
				Field field = new TextField("email", emails[i], Field.Store.YES);
				doc.add(field);

				// 加权操作。qq邮箱2.0 新浪有限1.5 其他默认1.0 谷歌0.5
				// 1.权值越高，查询结果越靠前。
				// 2.lucene4.0以后不能对doc加权
				// 3.只能对TextField加权
				if (emails[i].indexOf("qq.com") != -1) {
					field.setBoost(2.0f);
				} else if (emails[i].indexOf("sina.com") != -1) {
					field.setBoost(1.5f);
				} else if (emails[i].indexOf("google") != -1) {
					field.setBoost(3.5f);
				}

				doc.add(new IntField("fileSize", fileSizes[i], Field.Store.YES));
				// 对于内容只索引不存储
				doc.add(new TextField("content", contents[i], Field.Store.NO));
				iw.addDocument(doc);
			}
			iw.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}


	/****************************************** 查询(Read) *********************************************/
	//若要查询所有的文档，则新增索引的时候就给每一个文档加一个特殊的标记(如:"★"，或者tableName="user")，查询"★/user"就可以查询到所有的信息


	//查询所有索引数目 maxDoc()
	@Test
	public void readIndex() {
		try {
			IndexReader ir = DirectoryReader.open(directory);
			System.out.println("max num:" + ir.maxDoc());
			System.out.println("index num:" + ir.numDocs());
			// 删除了的索引数 4.X版本后取消了恢复删除
			System.out.println("delete index num:" + ir.numDeletedDocs());
			ir.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	

	// 根据条件查找索引
	@Test
	public void queryIndex() {
		try {
			IndexReader ir = DirectoryReader.open(directory);
			// 搜索器
			IndexSearcher searcher = new IndexSearcher(ir);
			// 查询哪个字段
			QueryParser parse = new QueryParser("email", analyzer);
			// 查询关键字
			Query query = parse.parse("zs");
			TopDocs topDocs = searcher.search(query, 1000);

			// 碰撞结果
			ScoreDoc[] hits = topDocs.scoreDocs;
			
			for (int i = 0; i < hits.length; i++) {
				ScoreDoc hit = hits[i];
				Document hitDoc = searcher.doc(hit.doc);
				// 结果按照得分来排序。主要由 关键字的个数和权值来决定
				System.out.println("(" + hit.doc + "-" + hit.score + ")" + 
						"id:" + hitDoc.get("id") + 
						" name:" + hitDoc.get("name") + 
						" email:" + hitDoc.get("email") +
						" content:" + hitDoc.get("content"));
			}
			ir.close();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		}
	}



	/**************************************** 索引更新(Update) *******************************************/	
	//原理是删除查询到的document 再增加一个新创建的document
	@Test
	public void updateIndex() {
		IndexWriterConfig conf = new IndexWriterConfig(analyzer);
		try {
			IndexWriter iw = new IndexWriter(directory, conf);
			Term term = new Term("id", "3");
			Document doc = new Document();
			doc.add(new StringField("id", "9", Field.Store.YES));
			doc.add(new StringField("name", "lsup", Field.Store.YES));
			doc.add(new StringField("email", "[email protected]", Field.Store.YES));
			doc.add(new IntField("fileSize", fileSizes[1], Field.Store.YES));
			
			//加权 索引排序结果按照得分来排序。主要由关键字的个数和权值来决定
			Field boostField = new TextField("content", contents[1], Field.Store.YES);
			doc.add(boostField);
			
			boostField.setBoost(5f);
			// 更新的时候，会把原来那个索引删掉，重新生成一个索引
			iw.updateDocument(term, doc);

			iw.commit();
			iw.close();

		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	

	/**************************************** 索引删除(Delete) *******************************************/	
	@Test
	public void deleteIndex() {
		IndexWriterConfig conf = new IndexWriterConfig(analyzer);
		try {
			IndexWriter iw = new IndexWriter(directory, conf);
			// Term[] terms = new Term[2];
			// Term term = new Term("id", "3");
			// terms[0] = term;
			// term = new Term("id", "3");
			// terms[1] = term;
			// 将id为 1和3的索引删除。
			// iw.deleteDocuments(term);
			// 也可以传一个Query数组对象，将Query查找的结果删除。
			QueryParser parse = new QueryParser("id", analyzer);
			// 查询关键字
			Query query = parse.parse("1");
			iw.deleteDocuments(query);

			// deleteDocuments
			iw.commit();
			iw.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}