src/main/java/org/wltea/analyzer/core/CharacterUtil.java
static char regularize(char input,boolean lowercase){
        if (input == 12288) {
            input = (char) 32;
            
        }else if (input > 65280 && input < 65375) {
            input = (char) (input - 65248);
            
        }else if (input >= 'A' && input <= 'Z' && lowercase) {
        	input += 32;
		}
        
        return input;
	}
static char regularize(char input,boolean lowercase){
        if (input == 12288) {
            input = (char) 32;
            
        }else if (input > 65280 && input < 65375) {
            input = (char) (input - 65248);
            
        }else if (input >= 'A' && input <= 'Z' && lowercase) {
        	input += 32;
		}
        
        return input;
	}
进行字符规格化（全角转半角，大写转小写处理）
@param input
@return char