Java时间大小比较详解编程语言

import java.text.ParseException; 
import java.text.SimpleDateFormat; 
import java.util.Calendar; 
import java.util.Date; 
 
public class Test { 
 
	private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); 
	private static SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
 
	public static void main(String[] args) throws Exception { 
		 
		//Date1.after(Date2),当Date1大于Date2时，返回TRUE，当小于等于时，返回false；  
		//Date1.before(Date2)，当Date1小于Date2时，返回TRUE，当大于等于时，返回false； 
		Date startDate = sdf.parse("2016-11-01"); 
		Date endDate = sdf.parse("2016-11-03"); 
		 
		Date currDate = sdf.parse("2016-11-03"); 
		 
		 
		//当前时间大于开始时间并且小于结束时间允许捐赠 
		if(currDate.after(startDate) && currDate.before(endDate)){ 
			System.out.println("--允许捐赠---------"); 
		} 
		 
		//当前时间小于开始时间，捐赠未开始 
		if(currDate.before(startDate)){ 
			System.out.println("--捐赠未开始---------"); 
		} 
		 
		//当前时间大于结束时间，捐赠已结束 
		if(currDate.after(endDate)){ 
			System.out.println("--捐赠已结束---------"); 
		} 
		 
		 
		System.out.println("当前时间大于开始时间true:" + currDate.after(startDate)); 
		System.out.println("当前时间小于结束时间true:" + currDate.before(endDate)); 
		 
		 
		Calendar calendar = Calendar.getInstance(); 
		Date currentDate = calendar.getTime(); 
		 
		 
		String s1 = "2016-12-01"; 
		String s2 = "2016-12-02"; 
		Calendar startTime = Calendar.getInstance(); 
		Calendar endTime = Calendar.getInstance(); 
		startTime.setTime(sdf.parse(s1)); 
		startTime.set(Calendar.HOUR_OF_DAY, 0); 
		startTime.set(Calendar.SECOND,0); 
		startTime.set(Calendar.MINUTE,0); 
		System.out.println("startTime : " + sdf1.format(startTime.getTime())); 
		endTime.setTime(sdf.parse(s2)); 
		endTime.set(Calendar.HOUR_OF_DAY, 23); 
		endTime.set(Calendar.SECOND,59); 
		endTime.set(Calendar.MINUTE,59); 
		System.out.println("endTime : " + sdf1.format(endTime.getTime())); 
		Calendar current = Calendar.getInstance(); 
		System.out.println("current : " + sdf1.format(current.getTime())); 
//		current.setTime(sdf.parse("2016-12-02")); 
		//0-等于，1-大于，-1小于 
		//当前时间大于开始时间并且小于结束时间允许捐赠 
		System.out.println(current.compareTo(startTime)); 
		System.out.println(current.compareTo(endTime)); 
		if((current.compareTo(startTime) == 1 || current.compareTo(startTime) == 0) && ( current.compareTo(endTime) == -1 || current.compareTo(endTime) == 0)){ 
			System.out.println("--允许捐赠---------"); 
		} 
		 
		//当前时间小于开始时间，捐赠未开始 
		if(current.compareTo(startTime) == -1){ 
			System.out.println("--捐赠未开始---------"); 
		} 
		 
		//当前时间大于结束时间，捐赠已结束 
		if(current.compareTo(endTime) == 1){ 
			System.out.println("--捐赠已结束---------"); 
		} 
		 
	} 
 
 
}