java日期时间工具类

java 代码

import java.sql.Time;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class DateUtil {
    /**
     * getDateStr get a string with format YYYY-MM-DD from a Date object
     *
     * @param date
     *            date
     * @return String
     */
    static public String getDateStr(Date date) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        return format.format(date);
    }

    static public String getYear(Date date) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy");
        return format.format(date);
    }
    static public String getDateStrC(Date date) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日");
        return format.format(date);
    }

    static public String getDateStrCompact(Date date) {
        if (date == null)
            return "";
        SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
        String str = format.format(date);
        return str;
    }

    /**
     * getDateStr get a string with format YYYY-MM-DD HH:mm:ss from a Date
     * object
     *
     * @param date
     *            date
     * @return String
     */
    static public String getDateTimeStr(Date date) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return format.format(date);
    }

    static public String getDateTimeStrC(Date date) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒");
        return format.format(date);
    }

    public static String getCurDateStr(String pattern) {
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        return format.format(new Date());
    }

    /**
     * Parses text in 'YYYY-MM-DD' format to produce a date.
     *
     * @param s
     *            the text
     * @return Date
     * @throws ParseException
     */
    static public Date parseDate(String s) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        return format.parse(s);
    }

    static public Date parseDateC(String s) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日");
        return format.parse(s);
    }

    /**
     * Parses text in 'YYYY-MM-DD' format to produce a date.
     *
     * @param s
     *            the text
     * @return Date
     * @throws ParseException
     */
    static public Date parseDateTime(String s) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return format.parse(s);
    }

    static public Date parseDateTimeC(String s) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒");
        return format.parse(s);
    }

    /**
     * Parses text in 'HH:mm:ss' format to produce a time.
     *
     * @param s
     *            the text
     * @return Date
     * @throws ParseException
     */
    static public Date parseTime(String s) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("HH:mm:ss");
        return format.parse(s);
    }

    static public Date parseTimeC(String s) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("HH时mm分ss秒");
        return format.parse(s);
    }

    static public int yearOfDate(Date s) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        String d = format.format(s);
        return Integer.parseInt(d.substring(0, 4));
    }

    static public int monthOfDate(Date s) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        String d = format.format(s);
        return Integer.parseInt(d.substring(5, 7));
    }

    static public int dayOfDate(Date s) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        String d = format.format(s);
        return Integer.parseInt(d.substring(8, 10));
    }

    static public String getDateTimeStr(java.sql.Date date, double time) {
        int year = date.getYear() + 1900;
        int month = date.getMonth() + 1;
        int day = date.getDate();
        String dateStr = year + "-" + month + "-" + day;
        Double d = new Double(time);
        String timeStr = String.valueOf(d.intValue()) + ":00:00";

        return dateStr + " " + timeStr;
    }

    /**
     * Get the total month from two date.
     *
     * @param sd
     *            the start date
     * @param ed
     *            the end date
     * @return int month form the start to end date
     * @throws ParseException
     */
    static public int diffDateM(Date sd, Date ed) throws ParseException {
        return (ed.getYear() - sd.getYear()) * 12 + ed.getMonth()
                - sd.getMonth() + 1;
    }

    static public int diffDateD(Date sd, Date ed) throws ParseException {
        return Math.round((ed.getTime() - sd.getTime()) / 86400000) + 1;
    }

    static public int diffDateM(int sym, int eym) throws ParseException {
        return (Math.round(eym / 100) - Math.round(sym / 100)) * 12
                + (eym % 100 - sym % 100) + 1;
    }

    static public java.sql.Date getNextMonthFirstDate(java.sql.Date date)
            throws ParseException {
        Calendar scalendar = new GregorianCalendar();
        scalendar.setTime(date);
        scalendar.add(Calendar.MONTH, 1);
        scalendar.set(Calendar.DATE, 1);
        return new java.sql.Date(scalendar.getTime().getTime());
    }

    static public java.sql.Date getFrontDateByDayCount(java.sql.Date date,
            int dayCount) throws ParseException {
        Calendar scalendar = new GregorianCalendar();
        scalendar.setTime(date);
        scalendar.add(Calendar.DATE, -dayCount);
        return new java.sql.Date(scalendar.getTime().getTime());
    }

    /**
     * Get first day of the month.
     *
     * @param year
     *            the year
     * @param month
     *            the month
     * @return Date first day of the month.
     * @throws ParseException
     */
    static public Date getFirstDay(String year, String month)
            throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        return format.parse(year + "-" + month + "-1");
    }

    static public Date getFirstDay(int year, int month) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        return format.parse(year + "-" + month + "-1");
    }

    static public Date getLastDay(String year, String month)
            throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Date date = format.parse(year + "-" + month + "-1");

        Calendar scalendar = new GregorianCalendar();
        scalendar.setTime(date);
        scalendar.add(Calendar.MONTH, 1);
        scalendar.add(Calendar.DATE, -1);
        date = scalendar.getTime();
        return date;
    }

    static public Date getLastDay(int year, int month) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Date date = format.parse(year + "-" + month + "-1");

        Calendar scalendar = new GregorianCalendar();
        scalendar.setTime(date);
        scalendar.add(Calendar.MONTH, 1);
        scalendar.add(Calendar.DATE, -1);
        date = scalendar.getTime();
        return date;
    }

    /**
     * getToday get todat string with format YYYY-MM-DD from a Date object
     *
     * @param date
     *            date
     * @return String
     */

    static public String getTodayStr() throws ParseException {
        Calendar calendar = Calendar.getInstance();
        return getDateStr(calendar.getTime());
    }

    static public Date getToday() throws ParseException {
        return new Date(System.currentTimeMillis());
    }

    static public String getTodayAndTime() {
        return new Timestamp(System.currentTimeMillis()).toString();
    }

    static public String getTodayC() throws ParseException {
        Calendar calendar = Calendar.getInstance();
        return getDateStrC(calendar.getTime());
    }

    static public int getThisYearMonth() throws ParseException {
        Date today = Calendar.getInstance().getTime();
        return (today.getYear() + 1900) * 100 + today.getMonth() + 1;
    }

    static public int getYearMonth(Date date) throws ParseException {
        return (date.getYear() + 1900) * 100 + date.getMonth() + 1;
    }

    // 获取相隔月数
    static public long getDistinceMonth(String beforedate, String afterdate)
            throws ParseException {
        SimpleDateFormat d = new SimpleDateFormat("yyyy-MM-dd");
        long monthCount = 0;
        try {
            java.util.Date d1 = d.parse(beforedate);
            java.util.Date d2 = d.parse(afterdate);

            monthCount = (d2.getYear() - d1.getYear()) * 12 + d2.getMonth()
                    - d1.getMonth();
            // dayCount = (d2.getTime()-d1.getTime())/(30*24*60*60*1000);

        } catch (ParseException e) {
            System.out.println("Date parse error!");
            // throw e;
        }
        return monthCount;
    }

    // 获取相隔天数
    static public long getDistinceDay(String beforedate, String afterdate)
            throws ParseException {
        SimpleDateFormat d = new SimpleDateFormat("yyyy-MM-dd");
        long dayCount = 0;
        try {
            java.util.Date d1 = d.parse(beforedate);
            java.util.Date d2 = d.parse(afterdate);

            dayCount = (d2.getTime() - d1.getTime()) / (24 * 60 * 60 * 1000);

        } catch (ParseException e) {
            System.out.println("Date parse error!");
            // throw e;
        }
        return dayCount;
    }

    // 获取相隔天数
    static public long getDistinceDay(Date beforedate, Date afterdate)
            throws ParseException {
        long dayCount = 0;

        try {
            dayCount = (afterdate.getTime() - beforedate.getTime())
                    / (24 * 60 * 60 * 1000);

        } catch (Exception e) {
            // System.out.println("Date parse error!");
            // // throw e;
        }
        return dayCount;
    }

    static public long getDistinceDay(java.sql.Date beforedate,
            java.sql.Date afterdate) throws ParseException {
        long dayCount = 0;

        try {
            dayCount = (afterdate.getTime() - beforedate.getTime())
                    / (24 * 60 * 60 * 1000);

        } catch (Exception e) {
            // System.out.println("Date parse error!");
            // // throw e;
        }
        return dayCount;
    }

    // 获取相隔天数
    static public long getDistinceDay(String beforedate) throws ParseException {
        return getDistinceDay(beforedate, getTodayStr());
    }

    // 获取相隔时间数
    static public long getDistinceTime(String beforeDateTime,
            String afterDateTime) throws ParseException {
        SimpleDateFormat d = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        long timeCount = 0;
        try {
            java.util.Date d1 = d.parse(beforeDateTime);
            java.util.Date d2 = d.parse(afterDateTime);

            timeCount = (d2.getTime() - d1.getTime()) / (60 * 60 * 1000);

        } catch (ParseException e) {
            System.out.println("Date parse error!");
            throw e;
        }
        return timeCount;
    }

    // 获取相隔时间数
    static public long getDistinceTime(String beforeDateTime)
            throws ParseException {
        return getDistinceTime(beforeDateTime, new Timestamp(System
                .currentTimeMillis()).toLocaleString());
    }

    // 获取相隔分钟数
    static public long getDistinceMinute(String beforeDateTime,
            String afterDateTime) throws ParseException {
        SimpleDateFormat d = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        long timeCount = 0;
        try {
            java.util.Date d1 = d.parse(beforeDateTime);
            java.util.Date d2 = d.parse(afterDateTime);
 &

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[转]开源框架带来的烦恼 | 在纯struts下使用ECSide的一点疑惑

• 2007-10-29 11:54
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评论

1 楼 hbthomes 2008-10-17  

好啊.我支持你