Base64编码 url编码 获取当月所有日期 获取当月第一天和最后一天

public static void main(String[] args) throws UnsupportedEncodingException {
    final String text = "待加密文字";
    final byte[] textByte = text.getBytes("UTF-8");
    //编码
    final String encodedText = Base64.encodeToString(textByte);
    //解码
    String sdecode = new String(Base64.decode(encodedText), "UTF-8");
    // url加密
    String urlString = URLEncoder.encode(sdecode, "utf-8");  //输出%E4%BD%A0%E5%A5%BD
    //url解密
    String keyWord = URLDecoder.decode(urlString, "utf-8");
    System.out.println("Base64编码**     " + encodedText);
    System.out.println("Base64解码**     " + sdecode);
    System.out.println("url加密**        " + urlString);
    System.out.println("url解密**        " + keyWord);  
    //获取当月第一天和最后一天
    Calendar cal = Calendar.getInstance();
    cal.setTime(new Date());
    cal.set(Calendar.DAY_OF_MONTH, 1);
    System.out.println(new SimpleDateFormat("yyyy-MM-dd").format(cal.getTime()));
    cal.roll(Calendar.DAY_OF_MONTH, -1);
    System.out.println(new SimpleDateFormat("yyyy-MM-dd").format(cal.getTime()));
    //获取当月所有日期
    List<String> list = new ArrayList<String>();
    Calendar aCalendar = Calendar.getInstance(Locale.CHINA);
    int year = aCalendar.get(Calendar.YEAR);//年份
    int month = aCalendar.get(Calendar.MONTH) + 1;//月份
    int day = aCalendar.getActualMaximum(Calendar.DATE);
    for (int i = 1; i <= day; i++) {
        String aDate = String.valueOf(year) + "-" + month + "-" + i;
        list.add(aDate);
    }
    System.out.println(list);
}