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package getBeforeHourDemo;
import java.text.SimpleDateFormat;
import java.util.Calendar;
//獲取當(dāng)前時間，指定前面多少小時的時間 
//返回格式Y(jié)YYYMMDDHHMMSS 
public class getBeforeHourTime {
  public static String getBeforeByHourTime(int ihour){ 
     String returnstr = ""; 
     Calendar calendar = Calendar.getInstance(); 
     calendar.set(Calendar.HOUR_OF_DAY, calendar.get(Calendar.HOUR_OF_DAY) - ihour); 
     SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss"); 
     returnstr = df.format(calendar.getTime()); 
     return returnstr; 
  } 
  public static void main(String[] args) {
    String beforetime=getBeforeByHourTime(2);
    System.out.println(beforetime); 
  }
}