packagecom.dada.test;importjava.text.SimpleDateFormat;importjava.util.Calendar;importjava.util.Date;
public classDateUtil {/*** 默认日期格式*/
public static String DEFAULT_FORMAT = "yyyy-MM-dd";/*** 测试主方法
*@paramargs*/
public static voidmain(String[] args) {for(int i = 1951;i < 1960;i++){
System.out.println(formatDate(getYearFirst(i)));
System.out.println(formatDate(getYearLast(i)));
}
System.out.println(formatDate(getCurrYearFirst()));
System.out.println(formatDate(getCurrYearLast()));
}/*** 格式化日期
*@paramdate 日期对象
*@returnString 日期字符串*/
public staticString formatDate(Date date){
SimpleDateFormat f= newSimpleDateFormat(DEFAULT_FORMAT);
String sDate=f.format(date);returnsDate;
}/*** 获取当年的第一天
*@paramyear
*@return
*/
public staticDate getCurrYearFirst(){
Calendar currCal=Calendar.getInstance();int currentYear =currCal.get(Calendar.YEAR);returngetYearFirst(currentYear);
}/*** 获取当年的最后一天
*@paramyear
*@return
*/
public staticDate getCurrYearLast(){
Calendar currCal=Calendar.getInstance();int currentYear =currCal.get(Calendar.YEAR);returngetYearLast(currentYear);
}/*** 获取某年第一天日期
*@paramyear 年份
*@returnDate*/
public static Date getYearFirst(intyear){
Calendar calendar=Calendar.getInstance();
calendar.clear();
calendar.set(Calendar.YEAR, year);
Date currYearFirst=calendar.getTime();returncurrYearFirst;
}/*** 获取某年最后一天日期
*@paramyear 年份
*@returnDate*/
public static Date getYearLast(intyear){
Calendar calendar=Calendar.getInstance();
calendar.clear();
calendar.set(Calendar.YEAR, year);
calendar.roll(Calendar.DAY_OF_YEAR,-1);
Date currYearLast=calendar.getTime();returncurrYearLast;
}
}
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