java实现的搜索引擎

1. Overview The following shows you how to use the Apache POI library and the Snowball stemmer. It is only a suggestion. You can of course use the library in other ways. 2. Apache POI Use the following code to extract text from a Word document: WordExtractor extractor = new WordExtractor(is); String text = extractor.getText(); // text now contains the content of the Word document 3. The Snowball stemmer Snowball provides stemmers for many languages and even helps us to create our own stemmers. We will use the stemmer: Sample code (refer to TestApp.java for details): StringBuffer input = new StringBuffer(); int character; SnowballStemmer stemmer = new org.tartarus.snowball.ext.englishStemmer(); while ((character = reader.read()) != -1) { char ch = (char) character; if (Character.isWhitespace((char) ch)) { if (input.length() > 0) { stemmer.setCurrent(input.toString()); for (int i = repeat; i != 0; i--) { stemmer.stem(); } output.write(stemmer.getCurrent()); input.delete(0, input.length()); } } else { input.append(Character.toLowerCase(ch)); } }