src/main/java/org/wltea/analyzer/core/LexemePath.java
int getXWeight(){
		int product = 1;
		Cell c = this.getHead();
		while( c != null && c.getLexeme() != null){
			product *= c.getLexeme().getLength();
			c = c.getNext();
		}
		return product;
	}
int getXWeight(){
		int product = 1;
		Cell c = this.getHead();
		while( c != null && c.getLexeme() != null){
			product *= c.getLexeme().getLength();
			c = c.getNext();
		}
		return product;
	}
X权重（词元长度积）
@return