public static void main(String[] args){ SpringApplication.run(Application.class, args); // String dateString = "2020-07-08"; SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM"); String beforedate=sdf.format(new Date()); System.out.println("转换之前:"+beforedate); String enddate=dataToUpper(beforedate); System.out.println("转换之后:"+enddate); } // 日期转化为大小写 public static String dataToUpper(String dateString) { SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM"); Date dateTime = null; try { dateTime = simpleDateFormat.parse(dateString); } catch (ParseException e) { e.printStackTrace(); } Calendar ca = Calendar.getInstance(); ca.setTime(dateTime); int year = ca.get(Calendar.YEAR); int month = ca.get(Calendar.MONTH) + 1; // int day = ca.get(Calendar.DAY_OF_MONTH); return numToUpper(year) + "年" + monthToUppder(month) + "月"; } public static String numToUpper(int num) { //String u[] = {"零","壹","贰","叁","肆","伍","陆","柒","捌","玖"}; String u[] = {"〇","一","二","三","四","五","六","七","八","九"}; char[] str = String.valueOf(num).toCharArray(); String rstr = ""; for (int i = 0; i < str.length; i++) { rstr = rstr + u[Integer.parseInt(str[i] + "")]; } return rstr; } // 月转化为大写 public static String monthToUppder(int month) { if(month < 10) { return numToUpper(month); } else if(month == 10){ return "十"; } else { return "十" + numToUpper(month - 10); } } // 日转化为大写 public static String dayToUppder(int day) { if(day < 20) { return monthToUppder(day); } else { char[] str = String.valueOf(day).toCharArray(); if(str[1] == '0') { return numToUpper(Integer.parseInt(str[0] + "")) + "十"; }else { return numToUpper(Integer.parseInt(str[0] + "")) + "十" + numToUpper(Integer.parseInt(str[1] + "")); } } }