全角转半角

public static String toBanJiao(String input) {
		char c[] = input.toCharArray();
		for (int i = 0; i < c.length; i++) {
			if (c[i] == '\u3000') {
				c[i] = ' ';
			} else if (c[i] > '\uFF00' && c[i] < '\uFF5F') {
				c[i] = (char) (c[i] - 65248);
			}
		}
		String returnString = new String(c);
		return returnString;
	}