转换日期，年月日
//处理选中日期到当前日期的前一天
/**
* 此方法用来判断日期的大小(按天计算)
* */
public int compareDate(String endTime,Date dt2) throws ParseException{
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
Date dt1 = sdf.parse(endTime);
if (dt1.getTime()/(1000*3600*24)+1 > dt2.getTime()/(1000*3600*24)) {
return 1;
}else if(dt1.getTime()/(1000*3600*24)+1 < dt2.getTime()/(1000*3600*24)) {//相等
return -1;
}else {
return 0;
}
}
/**
* 日期不符合进行日期的操作(按天计算)
* @throws ParseException
* */
public String CompareCanler(String date) throws ParseException {
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
//转换为日期格式
Date data = sdf.parse(date);
//创建日期
Calendar cade=Calendar.getInstance();
cade.setTime(data);
//天数减一
cade.add(Calendar.DAY_OF_MONTH, -1);
String dates=sdf.format(cade.getTime());
returndates;
}
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//处理所选中月份的信息，第一天到最后一天
/**处理日期格式按月查询格式
* @throws ParseException */
public int CompareMonth(String date) throws ParseException {
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM");
//转换传入的月份
Date dt1 = sdf.parse(date);
//建立当前日期
Calendar car=Calendar.getInstance();
//设置为月份的第一天
car.set(Calendar.DAY_OF_MONTH, 1);
String Month=sdf.format(car.getTime());
Date month=sdf.parse(Month);
if(dt1.getTime()/(1000*3600*24)+1< month.getTime()/(1000*3600*24)) {
return 1;
}else if(dt1.getTime()/(1000*3600*24)+1>month.getTime()/(1000*3600*24)){
return -1;
}
return 0;
}
/**处理按月查询，当月的日期范围
* @throws ParseException */
public String handlingMonth(String date) throws ParseException {
if(CompareMonth(date) == 1) {
System.out.println("日期小");
//日期非本月，查询所选的月份
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM");
//转换传入的日期的格式
Date month=sdf.parse(date);
//获取起始的日期
Calendar createTime=Calendar.getInstance();
createTime.setTime(month);
createTime.set(Calendar.DAY_OF_MONTH, 1);
//获取结束日期
Calendar endTime=Calendar.getInstance();
endTime.setTime(month);
// 获取本月的最后一天
int days = endTime.getActualMaximum(Calendar.DAY_OF_MONTH);
endTime.set(Calendar.DAY_OF_MONTH, days);
SimpleDateFormat sdf2=new SimpleDateFormat("yyyy-MM-dd");
String start=sdf2.format(createTime.getTime());
String end=sdf2.format(endTime.getTime());
return start+","+end;
}
if(CompareMonth(date)==-1) {
System.out.println("日期大");
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
Date month=new Date();
Calendar createTime=Calendar.getInstance();
createTime.setTime(month);
createTime.set(Calendar.DAY_OF_MONTH, 1);
Calendar endTime=Calendar.getInstance();
endTime.setTime(month);
endTime.add(Calendar.DAY_OF_MONTH, -1);
Stringstart = sdf.format(createTime.getTime());
String end=sdf.format(endTime.getTime());
return start+","+end;
}
return null;
}
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//处理年份的信息，最多2年，当前年向前推2年
/**换算年份的日期*/
public String CompareYear(String date) throws ParseException {
//获取当年的年份
Calendar car=Calendar.getInstance();
String date1=car.get(Calendar.YEAR)+"";
SimpleDateFormat sdf=new SimpleDateFormat("yyyy");
//把当年的年份进行转换
Date time1=sdf.parse(date1);
//把传入的年份进行转换
Date time3=sdf.parse(date);
//把传染的年份转换成日期格式
String date2=sdf.format(time3);
//把传入的年份转换成时间格式
Date time2=sdf.parse(date2);
if(time1.getTime()/(1000*3600*24) > time2.getTime()/(1000*3600*24)) {
//年份不等于当前的年份，也就是前2年，跟前一年
System.out.println("年份小于当年年份");
CalendarcheckDate=Calendar.getInstance();
//获取当年的年份
checkDate.set(Calendar.YEAR, checkDate.get(Calendar.YEAR)-2);
SimpleDateFormat sdfs=new SimpleDateFormat("yyyy");
String Years=sdfs.format(checkDate.getTime());
if(date.equals(Years)) {
System.out.println("进入2015");
//设置月底
Calendar car2=Calendar.getInstance();
car2.set(Calendar.YEAR,car2.get(Calendar.YEAR));
car2.set(Calendar.MONTH,car.get(Calendar.MONTH));
car2.set(Calendar.DAY_OF_MONTH,car.get(Calendar.DAY_OF_MONTH));
//转换开始的日期
SimpleDateFormat sdf1=new SimpleDateFormat("yyyy-MM-dd");
String startTime=sdf1.format(car2.getTime());
//设置月底的日期
Calendar car3=Calendar.getInstance();
car3.set(Calendar.YEAR,car3.get(Calendar.YEAR)-2);
car3.set(Calendar.MONTH,11);
car3.set(Calendar.DAY_OF_MONTH,31);
String endTime=sdf1.format(car3.getTime());
return startTime+","+endTime;
}else {
//设置日期为月初
Calendar car1=Calendar.getInstance();
car1.set(Calendar.YEAR,(car.get(Calendar.YEAR))-1);
car1.set(Calendar.MONTH,0);
car1.set(Calendar.DAY_OF_MONTH,1);
SimpleDateFormat sdf1=new SimpleDateFormat("yyyy-MM-dd");
String startTime=sdf1.format(car1.getTime());
//设置月底
Calendar car2=Calendar.getInstance();
car2.set(Calendar.YEAR,(car2.get(Calendar.YEAR))-1);
car2.set(Calendar.MONTH,11);
car2.set(Calendar.DAY_OF_MONTH,31);
SimpleDateFormat sdf2=new SimpleDateFormat("yyyy-MM-dd");
String endTime=sdf2.format(car2.getTime());
return startTime+","+endTime;
}
}else if(time1.getTime()/(1000*3600*24) == time2.getTime()/(1000*3600*24)) {
System.out.println("年份等于当前年份");
//设置日期为月初
Calendar car1=Calendar.getInstance();
//设置年为今年
car1.set(Calendar.YEAR,car.get(Calendar.YEAR));
//设置月份为1月
car1.set(Calendar.MONTH,0);
//设置天数为第一天
car1.set(Calendar.DAY_OF_MONTH,1);
SimpleDateFormat sdf1=new SimpleDateFormat("yyyy-MM-dd");
String startTime=sdf1.format(car1.getTime());
//设置月底
Calendar car2=Calendar.getInstance();
car2.set(Calendar.YEAR,car.get(Calendar.YEAR));
car2.set(Calendar.MONTH,car.get(Calendar.MONTH));
car2.set(Calendar.DAY_OF_MONTH,car.get(Calendar.DAY_OF_MONTH)-1);
SimpleDateFormat sdf2=new SimpleDateFormat("yyyy-MM-dd");
String endTime=sdf2.format(car2.getTime());
return startTime+","+endTime;
}else {
System.out.println("年份大于当前年份，不合理");
}
return null;
}