CharacterHelper.java

/**
 * Copyright (c)2010-2011 Enterprise Website Content Management System(EWCMS), All rights reserved.
 * EWCMS PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 * http://www.ewcms.com
 */

package com.ewcms.content.document.util.analyzer.help;

/**
 * <ul>
 * 字符集识别辅助工具类
 * </ul>
 * 
 * @author 吴智俊
 */
public class CharacterHelper {
	public static boolean isSpaceLetter(char input){
		return input == 8 || input == 9 
				|| input == 10 || input == 13 
				|| input == 32 || input == 160;
	}
	
	public static boolean isEnglishLetter(char input){
		return (input >= 'a' && input <= 'z') 
				|| (input >= 'A' && input <= 'Z');
	}
	
	public static boolean isArabicNumber(char input){
		return input >= '0' && input <= '9';
	}
	
	public static boolean isCJKCharacter(char input){
		Character.UnicodeBlock ub = Character.UnicodeBlock.of(input);
		if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS  
				|| ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS  
				|| ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
				//全角数字字符和日韩字符
				|| ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS
				//韩文字符集
				|| ub == Character.UnicodeBlock.HANGUL_SYLLABLES 
				|| ub == Character.UnicodeBlock.HANGUL_JAMO
				|| ub == Character.UnicodeBlock.HANGUL_COMPATIBILITY_JAMO
				//日文字符集
				|| ub == Character.UnicodeBlock.HIRAGANA //平假名
				|| ub == Character.UnicodeBlock.KATAKANA //片假名
				|| ub == Character.UnicodeBlock.KATAKANA_PHONETIC_EXTENSIONS
				) {  
			return true;
		}else{
			return false;
		}
		//其他的CJK标点符号，可以不做处理
		//|| ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
		//|| ub == Character.UnicodeBlock.GENERAL_PUNCTUATION  
	}
	
	
	/**
	 * 进行字符规格化（全角转半角，大写转小写处理）
	 * @param input
	 * @return char
	 */
	public static char regularize(char input){
        if (input == 12288) {
            input = (char) 32;
            
        }else if (input > 65280 && input < 65375) {
            input = (char) (input - 65248);
            
        }else if (input >= 'A' && input <= 'Z') {
        	input += 32;
		}
        
        return input;
	}
}