全角半角互换

/**
 * 半角转全角
 * @param input String.
 * @return 全角字符串.
 */
public static String ToSBC(String input) {
   char c[] = input.toCharArray();
   for (int i = 0; i < c.length; i++) {
      if (c[i] == ' ') {
         c[i] = '\u3000';
      } else if (c[i] < '\177') {
         c[i] = (char) (c[i] + 65248);

      }
   }
   return new String(c);
}

/**
 * 全角转半角
 * @param input String.
 * @return 半角字符串
 */
public static String ToDBC(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;
}