//将yyyyMMdd转为date
public static Date getCoreToEmsDateStr(String dateStr){
DateFormat format = new SimpleDateFormat("yyyyMMdd");
Date d = null;
try{
d = formatparse(dateStr);
}catch(ParseException e){
eprintStackTrace();
}
return d;
}
public static String getDateAfterDays(Timestamp s,int days){
Timestamp currTimestamp = s;
for (int i=0;i<days;i++){
currTimestamp = getNextDate(currTimestamp);
}
return getDateTimeStr(currTimestamp,"3");
}
public static Timestamp getNextDate(javasqlTimestamp tsDate){
if(tsDate==null)
return null;
javautilCalendar calendar = CalendargetInstance();
calendarsetTime(tsDate);
return getDateTime(calendarget(CalendarYEAR),calendarget(CalendarMONTH)+1,calendarget(CalendarDATE)+1,
calendarget(CalendarHOUR_OF_DAY),calendarget(CalendarMINUTE),calendarget(CalendarSECOND));
}
public static javasqlTimestamp getDateTime(int year,int month,int day,int hour,int minute,int second){
javasqlTimestamp ts = null;
javautilDate dt = null;
javautilCalendar calendar = CalendargetInstance();
calendarclear();
calendarset(year,month-1,day,hour,minute,second);
dt = calendargetTime();
ts = new javasqlTimestamp(dtgetTime());
return ts;
}
/
比较两个时间是否相同
@param tsBeginDate
@param tsEndDate
@param bool
@return
/
public static long getDateInterval(Timestamp tsBeginDate,Timestamp tsEndDate,boolean bool){
long lDays = 0;
if(bool){
tsBeginDate = CommongetDateTime(CommongetDateString(tsBeginDate),bool);
}
if(tsBeginDate!=null&&tsEndDate!=null){
Log4jinfo("tsEndDategetTime ()===="+tsEndDate);
Log4jinfo("tsBeginDategetTime ()===="+tsBeginDate);
lDays = (tsEndDategetTime()-tsBeginDategetTime())/86400000+1;
Log4jinfo("lDays===="+lDays);
}
return lDays;
}
/
格式化成Timestamp类型
@param sDt
@param bool
@return
/
public static javasqlTimestamp getDateTime(String sDt,boolean bool){
try{
return javasqlTimestampvalueOf(sDt); //sDt format:yyyy-mm-dd hh:mm:ssfffffffff
}catch(IllegalArgumentException iae){
if(bool)
sDt = sDt+" 23:59:590";
else
sDt = sDt+" 00:00:000";
return javasqlTimestampvalueOf(sDt);
}
}
/
根据时间获取日期字符串
@param ts
@return
/
public static String getDateString(Timestamp ts){
if(ts==null)
return "";
Calendar calendar = CalendargetInstance();
calendarsetTime(ts);
String strMonth = StringvalueOf(calendarget(CalendarMONTH)+1);
if(strMonthlength()==1){
strMonth = "0"+strMonth;
}
String strDay = StringvalueOf(calendarget(CalendarDATE));
if(strDaylength()==1){
strDay = "0"+strDay;
}
return calendarget(CalendarYEAR)+"-"+strMonth+"-"+strDay;
}
注意：注释部分是你出错的部分：#include <stdioh>
#include <stdlibh>//仅仅是输出，没有必要int
void nextdate(int y,int m,int d)
{
int flag = 1; //此处增加一个标识，日期是否错误 switch(m)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
//此处建议用大括号表示一个整体，看得清楚；同时日期格式错误
//直接输出错误信息即可，不必计算
{
if(d<31)d++;
else if(d==31)
{
if(m!=12)
{
m++;d=1;
}
else
{
y++;m=1;d=1;
}
}
else
{
printf ("The date is wrong !!\n");flag=0;
}
break;
}
case4:
case6:
case9:
case11:
if(d<30){m++;d=1;}
else
{
printf ("The date is wrong !!\n"); flag=0;
}
break;
case 2:
{
//闰年平年只有在2月份计算，没有必要把f提前计算，放在此处为妥。
int f=((y%4==0)&&(y%100!=0))||(y%400==0); if(!f)
{
if(d<28)d++;
else if(d==28){m++;d=1;}
else
{
printf ("The date is wrong !!\n"); flag=0;
}
break;
}
//是闰年的情况为什么你没有判断呢？我补上了
else
{
if(d<29)d++;
else if(d==29){m++;d=1;}
else
{
printf ("The date is wrong !!\n"); flag=0;
}
break;
}
}
} //最后根据日期格式是否错误决定是否输出明天的日期
if(flag)
{
printf("The date of next day is %d,%d,%d",y,m,d);
}
}
int main()
{
int y,m,d;
printf("input newdate;");
scanf("%d,%d%,%d",&y,&m,&d); //此处scanf格式化错误，应该也用逗号分割，和后面输入的一致
if(y<1820||y>2060)
{
printf ("The date is wrong !!\n");
}
else //此处少了，如果满足条件，则调用函数进行计算明天
{
nextdate(y,m,d);
}
system("pause"); //建议使用pause进行停屏。
}
1 输入是否合法
day_list[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
// 判断条件：
( year>=1920 && year<=2050 ) &&
(
( month>=1 && month<=12 && day>=1 && day<=day_list[month-1] )||
( month==2 && isLeap(year) && day>=1 && day<=29 )
)
2
/
函数说明： int NextDate(int month,int day,int year)
如果还有明天，返回1；
如果输入不合法，返回-1；
如果超出处理范围，返回-2
/
int bLeapYear;
int newY,newM,newD;
newY = year;
newM = month;
newD = day;
bLeapYear = ( (year%4)==0 && (year%100)!=0 ) || (year%400)==0;
if ( year>=1920 && year<=2050 )
{
if ( month>=1 && month<=12 && day>=1 )
{
if ( day<day_list[month-1] )
{
newD += 1;
}
else if ( day==day_list[month-1] && !bLeapYear )
{
if ( month==12 && day==31 )
{
if ( year==2050 ) return -2;
else
{
newY += 1; newM = 1; newD = 1;
}
}
else
{
newM += 1; newD = 1;
}
}
else if ( month==2 && bLeapYear )
{
if ( day==28 ) newD = 29;
else if( day==29 )
{ newM = 3; newD = 1; }
else return -1;
} else return -1;
}
}
// 输出
return 1;
3 测试方法：
31 闰年二月的最后一天
32 闰年二月的第28天
33 非闰年二月的第28天
34 每年的非二月的月末
35 每年的十二月的月末
36 2050年十二月的月末
37
year>2050 || year<1920 || month<1 || month>12 || day<1 ||
(day>day_list[month-1] && month>=1 && month<=12 && month!=2 ) ||
(day>28 && month==2 && !bLeapYear ) ||
(day>29 && month==2 && bLeapYear )
38 闰年非二月的月末 （34的分支）
测试出程序错误：
41
else if ( day==day_list[month-1] && !bLeapYear )
应改为：
else if ( day==day_list[month-1] && month!=2 )
42
else if ( month==2 && bLeapYear )
{
if ( day==28 ) newD = 29;
else if( day==29 )
{ newM = 3; newD = 1; }
else return -1;
}
应改为：
else if ( month==2 )
{
if ( day==28 && bLeapYear ) newD = 29;
else if( day==28 && !bLeapYear || ( day==29 && bLeapYear ) )
{ newM = 3; newD = 1; }
else return -1;
}
/
日历类 作者:lyj
@author Administrator
/
public class MyCalender {
private int year,month,day;//年月日
private static final int BIG_MONTH=31,SMALL_MONTH=30,LEAPYEAR=29,PINGYEAR=28;
private static final int ONE=1,TWELEVE=12;
/
构造函数
@param year 年
@param month 月
@param day 日
/
public MyCalender(int year,int month,int day){
thisyear=year;
thismonth=month;
thisday=day;
}
/
判断日历是否合法
@param my 日历
@return 1 合法 0不合法
/
public int isValid(MyCalender myCal){
//年份不能小于1
//月份不能大于12或者小于1
//日期不能大于31或者小于1
if((myCalyear<ONE) ||(myCalmonth>TWELEVE||myCalmonth<ONE)||
myCalday<ONE||myCalday>BIG_MONTH)
return 0;
return 1;
};
/
返回日历的前一天
@param d
@return
@throws Exception
/
public MyCalender previousDate(MyCalender myDay) throws Exception{
if(isValid(myDay)==0||day>howDay()){
throw new Exception("日历不合法！");
}
else if(day-1==0){
myDaysetMonth(month-1);//月份往前减一
myDaysetDay(howDay());
if(month==0){
myDaysetYear(year-1);
myDaysetMonth(12);
myDaysetDay(howDay());
}
}
else myDaysetDay(day-1);
return myDay;
};
/
返回日历的后一天
@param d
@return
@throws Exception
/
public MyCalender nextDate(MyCalender myDay) throws Exception{
if(isValid(myDay)==0||day>howDay()){
throw new Exception("日历不合法！");
}
//如果后一天大于当前日期的当月天数那么月份+1
else if(day+1>howDay()){
myDaysetDay(1);//日期为1
myDaysetMonth(month+1);
//如果月份大于12的话就年份加1
if(month>12){
myDaysetMonth(1);//月份设置为1
myDaysetYear(year+1);
}
}
else
myDaysetDay(day+1);
return myDay;
};
/
获得当前月份有多少天
@param year
@return
/
private int howDay(){
switch (month) {
case 1:case 3:case 5:case 7 :case 8:case 10:case 12:
return BIG_MONTH;
case 2:
if(isLeapyear())
return LEAPYEAR;
return PINGYEAR;
}
return SMALL_MONTH;
}
/
判断是否是平年
@return
/
protected boolean isLeapyear(){
return ((year%4==0 && year%100!=0)||(year%400==0));
}
@Override
public String toString() {
return year+"年"+month+"月"+day+"日";
};
/set/
public void setYear(int year) {
thisyear = year;
}
public void setDay(int day) {
thisday = day;
}
public void setMonth(int month) {
thismonth = month;
}
/set
//测试入口
@throws Exception /
public static void main(String[] args) throws Exception {
MyCalender my=new MyCalender(2012,11,29);
Systemoutprintln(myhowDay());
Systemoutprintln(mypreviousDate(my));
Systemoutprintln(mynextDate(my));
Systemoutprintln(mynextDate(my));
Systemoutprintln(mynextDate(my));
Systemoutprintln(mynextDate(my));
}
}
楼主你好 目前只实现了你需要的东西
还有就是我新创了一个群 不介意的话来交流 261957883
class MyDate{
public int year,month,day;
public MyDate(MyDate date){
year=dateyear;
month=datemonth;
day=dateday;
}
public boolean isLeapYear(){
return (((year%4==0)&&(year%100!=0))||(year%400==0));
}
public MyDate(int y,int m,int d){
year=y;
month=m;
day=d;
if(((month==1)||(month==3)||(month==5)||(month==7)||(month==8)||(month==10)||(month==12))&&((day<1)||(day>31))) Systemoutprintln("wrong date");
if(((month==4)||(month==6)||(month==9)||(month==11))&&((day<1)||(day>30))) Systemoutprintln("wrong date");
if(month==2){
if(isLeapYear()&&((day<1)||(day>29))) Systemoutprintln("wrong date");
if(!isLeapYear()&&((day<1)||(day>28))) Systemoutprintln("wrong date");
}
}
public boolean equal(MyDate date){
return (year==dateyear && month==datemonth && day==dateday);
}
public void incrementDay(){
if((month==1)||(month==3)||(month==5)||(month==7)||(month==8)||(month==10)){
int flag=0;
if(day==31){month+=1;flag=1;}
if((day<=30)&&(day>=1)){day+=1;}
if(flag==1) day=1;
flag=0;
}
if((month==4)||(month==6)||(month==9)||(month==11)){
int flag=0;
if(day==30){month+=1;flag=1;}
if((day<=29)&&(day>=1)){day+=1;}
if(flag==1) day=1;
flag=0;
}
if(month==12){
int flag=0;
if(day==31){year+=1;month=1;flag=1;}
if((day>=1)&&(day<=30)){day+=1;}
if(flag==1) day=1;
flag=0;
}
if(month==2){
int flag=0;
if(isLeapYear()){
if(day==29){month+=1;flag=1;}
if((day<=28)&&(day>=1)){day+=1;}
if(flag==1) day=1;
flag=0;
}
else{
if(day==28){month+=1;flag=1;}
if((day<=27)&&(day>=1)){day+=1;}
if(flag==1) day=1;
flag=0;
}
}
}
public int getYear(){
return year;
}
public int getMonth(){
return month;
}
public int getDay(){
return day;
}
public String toString(){
return (year+"-"+month+"-"+day);
}
}
public class Mytest{
public static void main(String[] test){
MyDate date1=new MyDate(2000,2,28);
MyDate date2=new MyDate(2006,12,31);
MyDate date3=new MyDate(date2);
Systemoutprintln(date3equal(date2));
date1incrementDay();
Systemoutprintln(date1getYear()+" "+date1getMonth()+" "+date1getDay());
Systemoutprintln(date1toString());
date2incrementDay();
Systemoutprintln(date2getYear()+" "+date2getMonth()+" "+date2getDay());
Systemoutprintln(date2toString());
}
}
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