time.java

我做的第一个java MIS项目

package server.entity;

import java.util.Calendar;
import java.util.Vector;

public class Time {

    Calendar calendar;
    String loctime;

    //返回一个当前时间字符串
    public String getloctime()
    {
        calendar=Calendar.getInstance();
        loctime=calendar.get(Calendar.YEAR)+"-"+(calendar.get(Calendar.MONTH)+1)+"-"+calendar.get(Calendar.DATE);
        return loctime;
    }
    //判断是否超期
    public static boolean chkdate(String starttime, String endtime)
    {
        //得到起始时和结束时的calendar对象
        Calendar calstart=Time.str2cal(starttime);
        Calendar calend=Time.str2cal(endtime);
        //得到期限时间
        calstart.add(Calendar.DAY_OF_MONTH,+5);
        //判断是否超期
        if(calstart.after(calend))
        {return false;}
        else
        {return true;}

    }

    //从字符导入返回一个时间对象
    public static Calendar str2cal(String strtime)
    {
        //得到年月天字符串
        String s1=strtime.substring(0,4);
        String s2=strtime.substring(5,strtime.lastIndexOf("-"));
        String s3=strtime.substring(strtime.lastIndexOf("-")+1);
        //得到制定calendar对象
        Calendar calendar;
        calendar=Calendar.getInstance();
        calendar.set(java.lang.Integer.parseInt(s1),java.lang.Integer.parseInt(s2),java.lang.Integer.parseInt(s3));
        return calendar;
    }
    //修改一个时间对象
    public static Calendar mdfcalobj (String oldtime,int y,int m,int d)
    {
            //得到年月天数
            String newy=oldtime.substring(0,4)+y;
            String newm=oldtime.substring(5,oldtime.lastIndexOf("-"))+m;
            String newd=oldtime.substring(oldtime.lastIndexOf("-")+1)+d;
            //得到制定calendar对象
            Calendar calendar;
            calendar=Calendar.getInstance();
            calendar.set(java.lang.Integer.parseInt(newy),java.lang.Integer.parseInt(newm),java.lang.Integer.parseInt(newd));
            return calendar;
    }
}