src/com/chenlb/mmseg4j/MMSeg.java
private static char[] toChars(StringBuilder bufSentence) {
		char[] chs = new char[bufSentence.length()];
		bufSentence.getChars(0, bufSentence.length(), chs, 0);
		return chs;
	}
private static char[] toChars(StringBuilder bufSentence) {
		char[] chs = new char[bufSentence.length()];
		bufSentence.getChars(0, bufSentence.length(), chs, 0);
		return chs;
	}
从 StringBuilder 里复制出 char[]