需求：将生日转为年龄
/**
* 获取年龄值
*/
public List getAgeInfo(List list) throws Exception {
if (null == list || list.size() == 0) {
return list;
}
Object object = list.get(0);
Class<?> aClass = object.getClass();
List<Field> fieldList = new ArrayList<>() ; while (null != aClass) {
fieldList.addAll(Arrays.asList(aClass .getDeclaredFields())); aClass = aClass.getSuperclass();
}
if (fieldList.size() == 0){
Field field = aClass.getDeclaredField("age");
setAgeByField(object, field);
}else {
for (int j = 0 ; j < fieldList.size(); j++) {
Field field = fieldList.get(j);
if ("age".equals(field.getName())){
setAgeByField(object, field);
}
}
}
return list;
} /**
* 设置年龄值
* @param object
* @param field
* @throws Exception
*/
private void setAgeByField(Object object, Field field) throws Exception {
if (!field.isAccessible()){
field.setAccessible(true);
}
String age = (String) field.get(object);
age = AgeUtil.getAgeStr(DateUtil.stringToDate(DateUtil.yyyyMMddHHmmss_,age));
field.set(object,age);
}
AgeUtil.getAgeStr()
@SuppressWarnings("static-access")
public static String getAgeStr(Date birthDate){
String ageStr = null;
if (birthDate == null) {
birthDate = new Date();
}
Calendar ca = Calendar.getInstance();
ca.setTime(birthDate);
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
// 获取年
int year = cal.get(cal.YEAR) - ca.get(ca.YEAR);
int mouth = cal.get(cal.MONTH) - ca.get(ca.MONTH);
int day = cal.get(cal.DAY_OF_MONTH) - ca.get(ca.DAY_OF_MONTH);
int hour = cal.get(cal.HOUR_OF_DAY) - ca.get(ca.HOUR_OF_DAY);
int mouths = year * 12 + mouth;
if (mouths < 12) {
year = 0;
} else {
year = mouths / 12;
}
Long bDay = birthDate.getTime();
Long eDay = new Date().getTime();
int oneDay = 60 * 60 * 24 * 1000;
double oneDays = (eDay - bDay) / oneDay;
if (oneDays < 30) {
mouth = 0;
} else {
mouth = mouths - year * 12;
}
Long bHour = birthDate.getTime();
Long eHour = new Date().getTime();
int oneHour = 60 * 60 * 1000;
double oneHours = (eHour - bHour) / oneHour;
if (oneHours < 24) {
day = 0;
} else {
if (mouths == 0) {
day = (int) oneDays;
}
}
Long bm = birthDate.getTime();
Long em = new Date().getTime();
int onem = 60 * 1000;
double oneMs = (em - bm) / onem;
if (oneMs < 24) {
hour = 0;
} else {
}
if (year > 0) {
if (mouth > 0) {
ageStr = (year + "岁" + mouth + "月");
} else if (day > 0) {
ageStr = (year + "岁" + day + "日");
} else if (hour > 0) {
ageStr = (year + "岁" + hour + "时");
}
} else if (mouth > 0) {
if (day > 0) {
ageStr = (mouth + "月" + day + "日");
} else if (hour > 0) {
ageStr = (mouth + "月" + hour + "时");
}
} else if (day > 0) {
if (hour > 0) {
ageStr = (day + "日" + hour + "时");
} else {
day = (day * 24 + hour) / 24;
ageStr = (day + "日" + (hour + 24) + "时");
}
} else if (hour > 0) {
ageStr = (0 + "日" + hour + "时");
}
return ageStr;
}DateUtil.stringToDate()
public static Date stringToDate(String pattern, String date) throws Exception {
SimpleDateFormat format = new SimpleDateFormat(pattern);
try {
return format.parse(date);
} catch (ParseException e) {
throw new BusinessException(SystemError.DATA_CONVERT_ERROR.getCode(),
SystemError.DATA_CONVERT_ERROR.getMessage());
}
}