Explore the technical principle of "DateCalc Commons" framework in the Java library

"DateCalc Commons" in the Java library is a common task for date computing and operation.It provides a set of convenient tools and methods to enable developers to easily handle the date and time. The technical principles of the "DateCalc Commons" framework are based on the Date class and Calendar classes of the Java and related time processing algorithms.It can be encapsulated by the functions of these classes and provides simpler and more intuitive interfaces, enabling developers to handle the date and time more effectively. Here are the introduction of technical principles and functions commonly used in the "DateCalc Commons" framework: 1. Date Calculation: The framework provides some methods for you to perform the date and subtraction of the date.For example, you can add the specified number of days to the date using the addadays () method, or use the subtractmontHs () method to reduce the specified monthly number from the date. Date currentDate = new Date(); Date newDate = DateCalc.getInstance().addDays(currentDate, 7); 2. Calculation of working days: The framework also provides the method of calculating working days (excluding weekends and holidays).You can use the isbusInessday () method to check whether the specific date is a working day, or use the addbusInessDays () method to add the specified number of working days to the date. Date currentDate = new Date(); Date newDate = DateCalc.getInstance().addBusinessDays(currentDate, 3); 3. Date comparison: The framework allows you to compare two dates and determine the relationship between them.You can compare the order of two dates using the Comparedates () method, or use the Issameday () method to check whether they indicate the same day. Date date1 = new Date(); Date date2 = new Date(); int comparisonResult = DateCalc.getInstance().compareDates(date1, date2); 4. Formatization and parsing date: The framework contains the method of formatting the date object to a specified string representation or the method of parsing from the string to the date object.You can use the formatdate () method to format the date into the specified date format, or use the PARSEDATE () method to resolve the string to the date object. Date currentDate = new Date(); String formattedDate = DateCalc.getInstance().formatDate(currentDate, "yyyy-MM-dd"); Date parsedDate = DateCalc.getInstance().parseDate("2022-01-01", "yyyy-MM-dd"); These are just some basic technical principles and functions provided in the "DateCalc Commons" framework.By understanding and using these methods, you can easily handle and operate the date and time, and improve efficiency when developing Java applications.