java计算时差

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package cn.com.pansky.usp4o.common.util;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;public class DateTool {private static DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  /**  * 计算时差  * @param beginTime  * @param endTime  * @return  */ public static String getTotalDateTime(String beginTime,String endTime){ String time = null; try { java.util.Date now = df.parse(beginTime); java.util.Date date=df.parse(endTime); long l=now.getTime()-date.getTime(); long day=l/(24*60*60*1000); long hour=(l/(60*60*1000)-day*24); long min=((l/(60*1000))-day*24*60-hour*60); long s=(l/1000-day*24*60*60-hour*60*60-min*60); //System.out.println(""+day+"天"+hour+"小时"+min+"分"+s+"秒"); time = hour+"小时"+min+"分"+s+"秒"; } catch (Exception e) {} return time; }   /**  * 字符串日期 转换为 Date  * @param strTime  * @return Date  */ public static Date getConvertDate(String strTime){ Date  rt= null; try { rt = df.parse(strTime);} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}return rt; }   /**  * 返回小时/分钟  * @param  4小时0分  * @return 4/0  */ public static String getSplitTime(String time){ String hour ,min = null; String[] field = time.split("小时"); hour=field[0]; String hV=field[1]; String[] mV= hV.split("分"); min=mV[0]; return hour+"/"+min; } /**  * 返回秒  * @param 4小时1分2秒  * @return  2  */ public static String getReturnSec(String time){ String sec = null; String[] field = time.split("分"); String[] sv=field[1].split("秒"); sec=sv[0]; return sec; }  /**  * 【4小时1分10秒】+【1小时3分10秒】=【5小时3分20秒】  * @param begin  * @param end  * @return  */ public static String getTotal(String begin,String end){ String hour ,min ,sec= null; String[] field = begin.split("小时"); hour=field[0]; String hV=field[1]; String[] mV= hV.split("分"); min=mV[0]; String sc = mV[1]; String[] mecV = sc.split("秒"); sec = mecV[0]; //--------------------- String hour1 ,min1,sec1 = null; String[] field1 = end.split("小时"); hour1=field1[0]; String hV1=field1[1]; String[] mV1= hV1.split("分"); min1=mV1[0]; String sc1 = mV1[1]; String[] mecV1 = sc1.split("秒"); sec1 = mecV1[0]; //----------------------- int sumHour,sumMin ,sumSec= 0; int h=Integer.parseInt(hour); int h1=Integer.parseInt(hour1); int m=Integer.parseInt(min); int m1=Integer.parseInt(min1); int s1=Integer.parseInt(sec1); int s=Integer.parseInt(sec); sumHour=h+h1; sumMin= m+m1; sumSec=s1+s; System.out.println("sumMin" +sumMin); for(int i =0;i<sumSec;i++){ if(sumSec >= 60){ sumMin=sumMin+60; sumSec=sumSec-60;  }else{break;  } } for(int i =0;i<sumMin;i++){ if(sumMin >= 60){ sumHour=sumHour+1; sumMin=sumMin-60;  }else{break;  } } return   sumHour + "小时" + sumMin + "分" +sumSec+"秒";// return   sumHour + "小时" + sumMin + "分"; }}
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