How to determine the day of the week in java?

java determines the day of the week the current date is:

  /** 
    * 判断当前日期是星期几<br> 
    * <br> 
    * @param pTime 修要判断的时间<br> 
    * @return dayForWeek 判断结果<br> 
    * @Exception 发生异常<br> 
    */  
public static int dayForWeek(String pTime) throws Exception {  
 format = new SimpleDateFormat("yyyy-MM-dd");  
 Calendar c = Calendar.getInstance();  
 c.setTime(format.parse(pTime));  
 int dayForWeek = 0;  
 if(c.get(Calendar.DAY_OF_WEEK) == 1){  
  dayForWeek = 7;  
 }else{  
  dayForWeek = c.get(Calendar.DAY_OF_WEEK) - 1;  
 }  
 return dayForWeek;  
}

It should be noted that Sunday is the first day of the week internationally, and the DAY_OF_WEEK provided in Calendar The week obtained also starts with Sunday.

The Chinese custom is to start the week on Monday, so it needs to be set according to the actual needs of the project.

The Calendar class provides some methods for conversion between calendar fields such as YEAR, MONTH, DAY_OF_MONTH, HOUR, etc., and provides some methods for operating calendar fields (such as getting the date of next week).

For more java knowledge, please pay attention to java basic tutorial.

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