【Java】Java根据出生日期计算还有几天的生日

SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
String clidate = "1978-03-30";
Calendar cToday = Calendar.getInstance(); // 存今天
Calendar cBirth = Calendar.getInstance(); // 存生日
cBirth.setTime(myFormatter.parse(clidate)); // 设置生日
cBirth.set(Calendar.YEAR, cToday.get(Calendar.YEAR)); // 修改为本年
int days;
if (cBirth.get(Calendar.DAY_OF_YEAR) < cToday.get(Calendar.DAY_OF_YEAR)) {
// 生日已经过了，要算明年的了
days = cToday.getActualMaximum(Calendar.DAY_OF_YEAR) - cToday.get(Calendar.DAY_OF_YEAR);
days += cBirth.get(Calendar.DAY_OF_YEAR);
} else {
// 生日还没过
days = cBirth.get(Calendar.DAY_OF_YEAR) - cToday.get(Calendar.DAY_OF_YEAR);
}
// 输出结果
if (days == 0) {
System.out.println("今天生日");
} else {
System.out.println("距离生日还有：" + days + "天");
}

@RequestMapping(value="/toPerBirthday.do")
public @ResponseBody List<Map<String, Object>> getIndexPerBasicInfo(HttpServletRequest request,
HttpServletResponse response,ModelMap model) throws Exception{
SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
//查询人员生日信息
List<PerBasicInfo> pBasicInfos = personBasicInfoService.findPerBirthdayDay();
List<Map<String, Object>> brithdayList = new ArrayList<Map<String, Object>>();

for(PerBasicInfo pb : pBasicInfos){
Map<String, Object> perBaiscMap = new HashMap<String, Object>();
String birthdayStr = myFormatter.format(pb.getBirthday());

Calendar cToday = Calendar.getInstance(); // 存今天
Calendar cBirth = Calendar.getInstance(); // 存生日
cBirth.setTime(myFormatter.parse(birthdayStr)); // 设置生日
cBirth.set(Calendar.YEAR, cToday.get(Calendar.YEAR)); // 修改为本年
int days;
if (cBirth.get(Calendar.DAY_OF_YEAR) < cToday.get(Calendar.DAY_OF_YEAR)) {
// 生日已经过了，要算明年的了
days = cToday.getActualMaximum(Calendar.DAY_OF_YEAR) - cToday.get(Calendar.DAY_OF_YEAR);
days += cBirth.get(Calendar.DAY_OF_YEAR);
} else {
// 生日还没过
days = cBirth.get(Calendar.DAY_OF_YEAR) - cToday.get(Calendar.DAY_OF_YEAR);
}

perBaiscMap.put("name", pb.getName());
perBaiscMap.put("birthday", birthdayStr);
perBaiscMap.put("time", birthdayStr.substring(5, 7).concat(".").concat(birthdayStr.substring(8, 10)));
perBaiscMap.put("type", "0");
if (days == BasicConstants.DAY_ZERO) {
perBaiscMap.put("type", "1");
perBaiscMap.put("msg",BasicConstants.TODAY.concat(pb.getName().replaceAll(",",  "、")).concat(BasicConstants.TEACHER_BRITHDAY));
}else if (days == BasicConstants.DAY_ONE) {
perBaiscMap.put("type", "1");
perBaiscMap.put("msg", BasicConstants.TOMORROW.concat(pb.getName().replaceAll(",", "、")).concat(BasicConstants.TEACHER_BRITHDAY));
}else if (days == BasicConstants.DAY_TWO) {
perBaiscMap.put("type", "1");
perBaiscMap.put("msg", BasicConstants.AFTER_TOMORROW.concat(pb.getName().replaceAll(",", "、")).concat(BasicConstants.TEACHER_BRITHDAY));
}
if(Integer.parseInt((String)perBaiscMap.get("type")) == 1){
brithdayList.add(perBaiscMap);
}
}
return brithdayList;
}