doc.add(new NumericField("attach",Field.Store.YES,true).setIntValue(attachs[i]));

doc.add(new NumericField("date",Field.Store.YES,true).setLongValue(dates[i].getTime()));

doc.add(new Field("id",ids[i],Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
doc.add(new Field("email",emails[i],Field.Store.YES,Field.Index.NOT_ANALYZED));
doc.add(new Field("email","test"+i+"@test.com",Field.Store.YES,Field.Index.NOT_ANALYZED));
doc.add(new Field("content",contents[i],Field.Store.NO,Field.Index.ANALYZED));

private Map<String,Float> scores = new HashMap<String,Float>();
scores.put("itat.org",2.0f);
scores.put("zttc.edu", 1.5f);

doc = new Document();
for(int i=0;i<ids.length;i++) {
	doc = new Document();
	doc.add(new Field("id",ids[i],Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
	doc.add(new Field("email",emails[i],Field.Store.YES,Field.Index.NOT_ANALYZED));
	doc.add(new Field("email","test"+i+"@test.com",Field.Store.YES,Field.Index.NOT_ANALYZED));
	doc.add(new Field("content",contents[i],Field.Store.NO,Field.Index.ANALYZED));
	doc.add(new Field("name",names[i],Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
	//存储数字
	doc.add(new NumericField("attach",Field.Store.YES,true).setIntValue(attachs[i]));
	//存储日期
	doc.add(new NumericField("date",Field.Store.YES,true).setLongValue(dates[i].getTime()));
	String et = emails[i].substring(emails[i].lastIndexOf("@")+1);
	System.out.println(et);
	if(scores.containsKey(et)) {
		doc.setBoost(scores.get(et));
	} else {
		doc.setBoost(0.5f);
	}
	writer.addDocument(doc);
}

writer.deleteDocuments(new Term("id","1"));
writer.commit();

reader.deleteDocuments(new Term("id","1"));
reader.close();//用Reader来删除的话，当前reader对象可识别出已删除的索引，但如果希望其他reader也能识别出来，就需要commit

IndexReader reader = IndexReader.open(directory,false);
//恢复时，必须把IndexReader的只读(readOnly)设置为false
reader.undeleteAll();
reader.close();

Document doc = new Document();
doc.add(new Field("id","11",Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
doc.add(new Field("email",emails[0],Field.Store.YES,Field.Index.NOT_ANALYZED));
doc.add(new Field("content",contents[0],Field.Store.NO,Field.Index.ANALYZED));
doc.add(new Field("name",names[0],Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
writer.updateDocument(new Term("id","1"), doc);

/**
 * 合并索引会消耗很大的开销，不建议使用forceMerge
 * 而推荐使用forceMergeDeletes()
 **/
writer = new IndexWriter(directory,indexWriterConfig,standardAnalyzer);
writer.forceMergeDeletes();

IndexReader reader = IndexReader.open(directory);
IndexSearcher searcher = new IndexSearcher(reader);
TermQuery query = new TermQuery(new Term("email","[email protected]"));
TopDocs tds = searcher.search(query, 10);