比较当前时间和给定时间大小

import java.io.*;
import java.util.Date;
import java.text.SimpleDateFormat; 
import java.text.DateFormat;

class test  
{
	public static void main (String[] args) throws java.lang.Exception
	{

        Date now = new Date();
        String a = "2016-07-06 14:30:00";
       
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm");
        Date dt1 = df.parse(a);
		System.out.println(dt1.getTime());
		System.out.println(now.getTime());
		
		if (dt1.getTime() > now.getTime()){
            System.out.println("aaa");
        }
	}
}