获取简单日期的方法

//获取日期（20091007）
    public static String getDateString()
    {
        StringBuffer stringbuffer = new StringBuffer();
        GregorianCalendar gregoriancalendar = new GregorianCalendar();
        int i = gregoriancalendar.get(1);
        //一月用0表示；所以获取月份之后要加1才表示当前月份
        int j = gregoriancalendar.get(2) + 1;
        int k = gregoriancalendar.get(5);
        stringbuffer.append(Integer.toString(i));
        if(j < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(j));
        if(k < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(k));
        return stringbuffer.toString();
    }

    //获取日期（如20091007102128187）
    public static String getDateTimeMillisString()
    {
        StringBuffer stringbuffer = new StringBuffer();
        GregorianCalendar gregoriancalendar = new GregorianCalendar();
        int i = gregoriancalendar.get(1);
        int j = gregoriancalendar.get(2) + 1;
        int k = gregoriancalendar.get(5);
        int l = gregoriancalendar.get(11);
        int i1 = gregoriancalendar.get(12);
        int j1 = gregoriancalendar.get(13);
        int k1 = gregoriancalendar.get(14);
        stringbuffer.append(Integer.toString(i));
        if(j < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(j));
        if(k < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(k));
        if(l < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(l));
        if(i1 < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(i1));
        if(j1 < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(j1));
        stringbuffer.append(Integer.toString(k1));
        return stringbuffer.toString();
    }

    //获取日期（如20091007102128）
    public static String getDateTimeString()
    {
        StringBuffer stringbuffer = new StringBuffer();
        GregorianCalendar gregoriancalendar = new GregorianCalendar();
        int i = gregoriancalendar.get(1);
        int j = gregoriancalendar.get(2) + 1;
        int k = gregoriancalendar.get(5);
        int l = gregoriancalendar.get(11);
        int i1 = gregoriancalendar.get(12);
        int j1 = gregoriancalendar.get(13);
        stringbuffer.append(Integer.toString(i));
        if(j < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(j));
        if(k < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(k));
        if(l < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(l));
        if(i1 < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(i1));
        if(j1 < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(j1));
        return stringbuffer.toString();
    }

    //获取时间（如102128时分秒）
    public static String getTimeString()
    {
        StringBuffer stringbuffer = new StringBuffer();
        GregorianCalendar gregoriancalendar = new GregorianCalendar();
        int i = gregoriancalendar.get(11);
        int j = gregoriancalendar.get(12);
        int k = gregoriancalendar.get(13);
        if(i < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(i));
        if(j < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(j));
        if(k < 10)
            stringbuffer.append("0");
        stringbuffer.append(Integer.toString(k));
        return stringbuffer.toString();
    }