java获取当前月的天数 java 获取当前月

package test;
import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;/**
• @author [e-mail]
• @date 2021-12-30 15:57
 */
 public class Test5 {
 public static void main(String[] args) throws ParseException {
 SimpleDateFormat sdf1=new SimpleDateFormat(“yyyyMM”);
 SimpleDateFormat sdf2=new SimpleDateFormat(“yyyyMMdd”);
 Date nowDate=sdf1.parse(“202212”);
 Calendar calendar = Calendar.getInstance();
 calendar.setTime(nowDate);
 calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
 System.out.println(sdf2.format(calendar.getTime()));String year1 = "2020";
 String month2 = "12";

 int year = calendar.get(Calendar.YEAR); //2015，当前年份
 int month = calendar.get(Calendar.MONTH) + 1; //12，当前月，注意加 1}