java中获取当前时间的几种方式
1、new Data()
SimpleDateFormat simpleFormat =newSimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String datastring=si1.format(newDate());
//把获取的时间转换为date格式
DateinsertDate=simpleFormat.parse(datastring);
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2、system获取
long current=System.currentTimeMillis();//当前时间毫秒数
3、日期类
Calendar rightNow = Calendar.getInstance(); // 子类对象
// 获取年
int year = rightNow.get(Calendar.YEAR);
// 获取月
int month = rightNow.get(Calendar.MONTH);
// 获取日
int date= rightNow.get(Calendar.DATE);
// 获取几点
int hour = rightNow.get(Calendar.HOUR_OF_DAY);
// 获取上午下午
int moa = rightNow.get(Calendar.AM_PM);
if(moa == 1) {
System.out.println("下午");
} else{
System.out.println("上午");
}
System.out.println(year + "年"+ (month + 1) + "月"+ date+ "日"+ hour + "时");
rightNow.add(Calendar.YEAR, 5);
rightNow.add(Calendar.DATE, -10);
int year1 = rightNow.get(Calendar.YEAR);
int date1 = rightNow.get(Calendar.DATE);
System.out.println(year1 + "年"+ (month + 1) + "月"+ date1 + "日"+ hour + "时");
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