一个Calendar的例子

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一个Calendar的例子

作者：佚名来源：不详点击：更新：2006-12-19

简介：

package org.oa;
import java.util.*;
import java.text.*;

public class nowDate {
    public Date GetNowDate() {
        SimpleDateFormat formatter =
            new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        java.util.Date currentTime_1 = new java.util.Date();
        String dateString = formatter.format(currentTime_1);
        ParsePosition pos = new ParsePosition(8);
        Date currentTime_2 = formatter.parse(dateString, pos);
        return currentTime_2;
    }
    public String GetStringDate() {
        SimpleDateFormat formatter =
            new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        java.util.Date currentTime_1 = new java.util.Date();
        String dateString = formatter.format(currentTime_1);
        return dateString;
    }
    public String getDayDate() {
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        java.util.Date currentTime_1 = new java.util.Date();
        String dateString = formatter.format(currentTime_1);
        return dateString;
    }
    public String getNowWeek() {
        String Targetstr = GetStringDate();
        String tempStrI[] = new String[3];
        tempStrI[0] = Targetstr.substring(0, 4);
        tempStrI[1] = Targetstr.substring(5, 7);
        tempStrI[2] = Targetstr.substring(8, 10);
        Calendar cal = Calendar.getInstance();
        cal.set(
            Integer.parseInt(tempStrI[0]) - 1900,
            Integer.parseInt(tempStrI[1]),
            Integer.parseInt(tempStrI[2]));
        int NowWeek = cal.get(Calendar.WEEK_OF_MONTH);
        cal.add(Calendar.DAY_OF_YEAR, -NowWeek);
        int stryear = cal.get(Calendar.YEAR);
        int strmonth = cal.get(Calendar.MONTH);
        int strday = cal.get(Calendar.DAY_OF_MONTH);
        return new String(
            "" + (stryear + 1900) + "-" + strmonth + "-" + strday);
    }
    public String getLastNumWeek(int LastNum) {
        String Targetstr = GetStringDate();
        String tempStrI[] = new String[3];
        tempStrI[0] = Targetstr.substring(0, 4);
        tempStrI[1] = Targetstr.substring(5, 7);
        tempStrI[2] = Targetstr.substring(8, 10);
        Calendar cal = Calendar.getInstance();
        cal.set(
            Integer.parseInt(tempStrI[0]) - 1900,
            Integer.parseInt(tempStrI[1]),
            Integer.parseInt(tempStrI[2]));
        int NowWeek = cal.get(Calendar.WEEK_OF_MONTH);
        cal.add(Calendar.WEEK_OF_MONTH, -LastNum);
        cal.add(Calendar.DAY_OF_YEAR, -NowWeek);
        int stryear = cal.get(Calendar.YEAR);
        int strmonth = cal.get(Calendar.MONTH);
        int strday = cal.get(Calendar.DAY_OF_MONTH);
        return new String(
            "" + (stryear + 1900) + "-" + strmonth + "-" + strday);
    }
    public String getNowDay() {
        String Targetstr = GetStringDate();
        String tempStrI[] = new String[3];
        tempStrI[0] = Targetstr.substring(0, 4);
        tempStrI[1] = Targetstr.substring(5, 7);
        tempStrI[2] = Targetstr.substring(8, 10);
        return new String(
            "" + tempStrI[0] + "-" + tempStrI[1] + "-" + tempStrI[2]);
    }
    public String getLastNumDay(int LastNum) {
        String Targetstr = GetStringDate();
        String tempStrI[] = new String[3];
        tempStrI[0] = Targetstr.substring(0, 4);
        tempStrI[1] = Targetstr.substring(5, 7);
        tempStrI[2] = Targetstr.substring(8, 10);
        Calendar cal = Calendar.getInstance();
        cal.set(
            Integer.parseInt(tempStrI[0]) - 1900,
            Integer.parseInt(tempStrI[1]),
            Integer.parseInt(tempStrI[2]));
        cal.add(Calendar.DAY_OF_YEAR, -LastNum);
        int stryear = cal.get(Calendar.YEAR);
        int strmonth = cal.get(Calendar.MONTH);
        int strday = cal.get(Calendar.DAY_OF_MONTH);
        return new String(
            "" + (stryear + 1900) + "-" + strmonth + "-" + strday);
    }
    public String getNowMonth() {
        String Targetstr = GetStringDate();
        String tempStrI[] = new String[3];
        tempStrI[0] = Targetstr.substring(0, 4);
        tempStrI[1] = Targetstr.substring(5, 7);
        tempStrI[2] = Targetstr.substring(8, 10);
        Calendar cal = Calendar.getInstance();
        cal.set(
            Integer.parseInt(tempStrI[0]) - 1900,
            Integer.parseInt(tempStrI[1]),
            Integer.parseInt

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