java 全角转半角，半角转全角

全角转半角

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;
    }

半角转全角

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);
    }