Question

请问：怎么用java语言获取当前系统时间，以便自动插入数据库中？

Answer 1

1.Date() + SimpleDateFormat()
 DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");Date date = new Date();System.out.println(dateFormat.format(date));
2. Calender() + SimpleDateFormat()

Calendar cal = Calendar.getInstance();
System.out.println(dateFormat.format(cal.getTime()));
举个例子给你：
import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
 
 
public class GetCurrentDateTime {
  public static void main(String[] args) {
 
	   DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
	   //get current date time with Date()
	   Date date = new Date();
	   System.out.println(dateFormat.format(date));
 
	   //get current date time with Calendar()
	   Calendar cal = Calendar.getInstance();
	   System.out.println(dateFormat.format(cal.getTime()));
 
  }
}

别忘了import

Answer 2

import java.util.Calendar;
import java.util.Date();

public class gaintime {

/**
* @param args
*/

public static void main(String[] args) {
// TODO Auto-generated method stub
Date() today = new Date();
System.out.println("当前时间是" + today.toString());
Calendar now = Calendar.getInstance();
int day = now.get(Calendar.DATE);
int time = now.get(Calendar.HOUR_OF_DAY);

System.out.println(time);
if (time >= 0 && time <= 6) {
time = 0;
} else if (time >= 7 && time <= 12) {
time = 1;
} else if (time >= 13 && time <= 14) {
time = 2;
} else if (time >= 15 && time < 18) {
time = 3;
} else if (time >= 19 && time <= 22) {
time = 4;
} else if (time >= 23 && time <= 24) {
time = 5;
}
switch (time) {
case 0:
System.out.println("早上好！");
break;
case 1:
System.out.println("工作时间！");
break;
case 2:
System.out.println("午安时间！");
break;
case 3:
System.out.println("工作时间！");
break;
case 4:
System.out.println("努力工作！");
break;
case 5:
System.out.println("晚安啦！");
break;

}
}

}

Answer 3

new Date().toLocaleString()