JAVA判断中英文,并根据中英文自动截取字符串

public class aaa {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		String string = "041偷功.mp3";
		System.out.println(judgeChina(string, 5));
	}
	/**
	 * 
	 * @param content 输入的内容
	 * @param maxSize 最大长度
	 * @return
	 */
	public static String judgeChina(String content, Integer maxSize) {
		Integer index = 0;

		StringBuffer sBuffer = new StringBuffer();
		for (int i = 0; i < content.length(); i++) {
			String retContent = content.substring(i, i + 1);
			// 生成一个Pattern,同时编译一个正则表达式
			boolean isChina = retContent.matches("[u4E00-u9FA5]");
			boolean isCapital = retContent.matches("[A-Z]");
			
			if (index == maxSize) {
				sBuffer.append("..");
				break;
			}

			if ((index == maxSize - 1 && isChina)) {
				continue;
			}

			if (isChina || isCapital) {
				index = index + 2;
			} else {
				index = index + 1;
			}
			sBuffer.append(retContent);

			if (index > maxSize) {
				sBuffer.append("..");
				break;
			}
		}
		return sBuffer.toString();
	}
}