org.wltea.analyzer.sample.LuceneTokenizerDemo.java Source code

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Here is the source code for org.wltea.analyzer.sample.LuceneTokenizerDemo.java

Source

package org.wltea.analyzer.sample;

import java.io.IOException;
import java.io.StringReader;

import org.apache.lucene.analysis.Analyzer.TokenStreamComponents;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.ngram.NGramTokenizer;
import org.apache.lucene.analysis.standard.ClassicTokenizer;
import org.apache.lucene.analysis.standard.StandardTokenizer;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.analysis.tokenattributes.OffsetAttribute;
import org.apache.lucene.analysis.tokenattributes.TypeAttribute;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class LuceneTokenizerDemo {

    public static void main(String[] args) {
        new LuceneTokenizerDemo().testNT();
    }

    /**
     * ?StandardTokenizer
     */
    public void testST() {
        Tokenizer tokenizer = new StandardTokenizer();
        try {
            tokenizer.setReader(new StringReader(
                    "?????IKAnalyer can analysis english text too"));
        } catch (IOException e) {
            throw new RuntimeException();
        }
        TokenStreamComponents tsc = new TokenStreamComponents(tokenizer);
        TokenStream ts = tsc.getTokenStream();
        OffsetAttribute offset = ts.addAttribute(OffsetAttribute.class);
        CharTermAttribute term = ts.addAttribute(CharTermAttribute.class);
        TypeAttribute type = ts.addAttribute(TypeAttribute.class);
        try {
            ts.reset();
            while (ts.incrementToken()) {
                System.out.println(term.toString() + "->" + offset.startOffset() + "-" + offset.endOffset() + "->"
                        + type.type());
            }
            ts.end();
        } catch (IOException e) {
            throw new RuntimeException();
        }
    }

    /**
     * ?ClassTokenizer
     */
    public void testCT() {
        Tokenizer tokenizer = new ClassicTokenizer();
        try {
            tokenizer.setReader(new StringReader(
                    "?????IKAnalyer can analysis english text too"));
        } catch (IOException e) {
            throw new RuntimeException();
        }
        TokenStreamComponents tsc = new TokenStreamComponents(tokenizer);
        TokenStream ts = tsc.getTokenStream();
        OffsetAttribute offset = ts.addAttribute(OffsetAttribute.class);
        CharTermAttribute term = ts.addAttribute(CharTermAttribute.class);
        TypeAttribute type = ts.addAttribute(TypeAttribute.class);
        try {
            ts.reset();
            while (ts.incrementToken()) {
                System.out.println(term.toString() + "->" + offset.startOffset() + "-" + offset.endOffset() + "->"
                        + type.type());
            }
            ts.end();
        } catch (IOException e) {
            throw new RuntimeException();
        }
    }

    /**
     * ?NGramTokenizer
     * min:1,max:2
     */
    public void testNT() {
        Tokenizer tokenizer = new NGramTokenizer();
        try {
            tokenizer.setReader(new StringReader(
                    "?????IKAnalyer can analysis english text too"));
        } catch (IOException e) {
            throw new RuntimeException();
        }
        TokenStreamComponents tsc = new TokenStreamComponents(tokenizer);
        TokenStream ts = tsc.getTokenStream();
        OffsetAttribute offset = ts.addAttribute(OffsetAttribute.class);
        CharTermAttribute term = ts.addAttribute(CharTermAttribute.class);
        TypeAttribute type = ts.addAttribute(TypeAttribute.class);
        try {
            ts.reset();
            while (ts.incrementToken()) {
                System.out.println(term.toString() + "->" + offset.startOffset() + "-" + offset.endOffset() + "->"
                        + type.type());
            }
            ts.end();
        } catch (IOException e) {
            throw new RuntimeException();
        }
    }

}