Lucene là cái gì
Field.Keyword – The data is stored and indexed but not tokenized. This is most useful for data that should be stored unchanged such as a date. In fact, the Field.Keyword can take a Date object as input. Field.Text – The data is stored, indexed, and tokenized. Field.Text fields should not be used for large amounts of data such as the article itself because the index will get very large since it will contain a full copy of the article plus the tokenized version. Field.UnStored – The data is not stored but it is indexed and tokenized. Large amounts of data such as the text of the article should be placed in the index unstored. Field.UnIndexed – The data is stored but not indexed or tokenized. This is used with data that you want returned with the results of a search but you won’t actually be searching on this data. In our example, since we won’t allow searching for the URL there is no reason to index it but we want it returned to us when a search result is found. http://www.javaranch.com/journal/2004/04/Lucene.html ...