java日期间相隔年月日计算

Myth丶恋晨 2021-11-11 13:34 316阅读 0赞

/\*\*  
\* 获取date1相距date2多少天， date2>date1  
\* @param date1  
\* @param date2  
\* @return  
\* @throws ParseException  
\*/  
public static int getDaysSpace(String date1,String date2)\{  
Calendar cal = Calendar.getInstance();  
cal.setTime(getDate(date1, "yyyyMMdd"));  
long time1 = cal.getTimeInMillis();  
cal.setTime(getDate(date2, "yyyyMMdd"));  
long time2 = cal.getTimeInMillis();  
long between\_days=(time2-time1)/(1000\*3600\*24);  
return Integer.parseInt(String.valueOf(between\_days));  
\}

/\*\*  
\* 获取date1相距date2几个月， date2>date1  
\* @param date1  
\* @param date2  
\* @return  
\* @throws ParseException  
\*/  
public static float getMonthSpace(String date1, String date2)\{  
float result = 0;  
Calendar c1 = Calendar.getInstance();  
Calendar c2 = Calendar.getInstance();  
c1.setTime(getDate(date1, "yyyyMMdd"));  
c2.setTime(getDate(date2, "yyyyMMdd"));  
if(c2.get(Calendar.DATE) - c1.get(Calendar.DATE) >= 0)\{  
result = (c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR)) \* 12.0f + (c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH)) + (c2.get(Calendar.DATE) - c1.get(Calendar.DATE))/30.0f;  
\}else\{  
result = (c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR)) \* 12.0f + (c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH)) - 1.0f + (c2.get(Calendar.DATE) - c1.get(Calendar.DATE))/30.0f;  
\}  
DecimalFormat df = new DecimalFormat("0.00");  
return Float.parseFloat(df.format(result));  
\}

/\*\*  
\* 获取date1相距date2几年， date2>date1  
\* @param date1  
\* @param date2  
\* @return  
\* @throws ParseException  
\*/  
public static float getYearSpace(String date1, String date2) \{  
DecimalFormat df = new DecimalFormat("0.00");  
return Float.parseFloat(df.format(getMonthSpace(date1, date2)/12.0f));  
\}

转载于:https://www.cnblogs.com/Jiphen/p/6180354.html