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

public class Test {

	/**
	 * 获取给定时间与当前系统时间的差值（以毫秒为单位）
	 * 
	 * @author GaoHuanjie
	 */
	public long getTimeDifferenceBetweenSystemTimeAndParamTime(String paramTime) {
		DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String systemTime = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss").format(new Date().getTime());// 获取系统时间
		long difference = 0;
		try {
			Date systemDate = dateFormat.parse(systemTime);
			Date paramDate = dateFormat.parse(paramTime);
			difference = systemDate.getTime() - paramDate.getTime();
			System.out.println("系统时间：" + systemTime + "，给定时间：" + paramTime 	+ "，给定时间与当前系统时间的差值（以毫秒为单位）：" + difference + "毫秒");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return difference;
	}
	
	public static void main(String[] args) {
		new Test().getTimeDifferenceBetweenSystemTimeAndParamTime("2014-06-04 14:48:47");
	}
}