Question

我做了一个独立的方法，在密码过期之日起5个正常天之前发送电子邮件给密码将在30天后到期的相应用户。现在我很困惑如何在密码过期后的5个工作日内发送电子邮件。以下是我在5个正常日之前向用户发送通知的逻辑。

Class.forName("com.mysql.jdbc.Driver");          
System.out.println("Connecting to database...");
conn = DriverManager.getConnection(DB_URL,USER,PASS);
System.out.println("Creating statement...");
stmt = conn.createStatement();
String sql;
sql = "select EMAIL_ID from  user_master where date_add(password_change_date, interval 25 day) < CURDATE();";
ResultSet rs = stmt.executeQuery(sql);
while(rs.next()){               
 String emailId  = rs.getString("email_id");             
System.out.println("Email Id: "+emailId);
 PasswordExpiry.sendHTMLEmail( from, emailId, host, user, password, subject, body );
              } 
rs.close();
 stmt.close();
conn.close();

PasswordExpiry.sendHTMLEmail（）方法，用于向各个用户发送邮件。

Answer 1

您可以使用这种通用方法查找两天之间的工作日：

public static int getWorkingDaysBetweenTwoDates(Date startDate, Date endDate) {
        Calendar startCal = Calendar.getInstance();
        startCal.setTime(startDate);
        Calendar endCal = Calendar.getInstance();
        endCal.setTime(endDate);
        int workDays = 0;
        //Return 0 if start and end are the same
        if (startCal.getTimeInMillis() == endCal.getTimeInMillis()) {
            return 0;
        }
    if (startCal.getTimeInMillis() > endCal.getTimeInMillis()) {
        startCal.setTime(endDate);
        endCal.setTime(startDate);
    }
    do {
        //excluding start date
        startCal.add(Calendar.DAY_OF_MONTH, 1);
        if (startCal.get(Calendar.DAY_OF_WEEK) != Calendar.SATURDAY && startCal.get(Calendar.DAY_OF_WEEK) != Calendar.SUNDAY) {
            ++workDays;
        }
    } while (startCal.getTimeInMillis() < endCal.getTimeInMillis()); //excluding end date
    return workDays;

}

根据您的要求，此方法将返回您要过期的密码的剩余天数。如果这> 5你可以发送电子邮件。或告诉密码有效，直到像Windows一样的电子邮件天数

Answer 2

考虑这个例子，我摆弄了here：

select expiry, dayname(expiry) as expiry_weekday, user, 

                         CASE weekday(expiry)
                           WHEN 0 THEN date_add(expiry,INTERVAL -7 DAY) -- MON -> MON
                           WHEN 1 THEN date_add(expiry,INTERVAL -7 DAY) -- TUE -> TUE
                           WHEN 2 THEN date_add(expiry,INTERVAL -7 DAY) -- WED -> WED
                           WHEN 3 THEN date_add(expiry,INTERVAL -7 DAY) -- THU -> THU
                           WHEN 4 THEN date_add(expiry,INTERVAL -7 DAY) -- FRI -> FRI
                           WHEN 5 THEN date_add(expiry,INTERVAL -8 DAY) -- SAT -> FRI
                           WHEN 6 THEN date_add(expiry,INTERVAL -9 DAY) -- SUN -> FRI
                         END
                          as notification_date,

                         dayname(CASE weekday(expiry)
                                 WHEN 0 THEN date_add(expiry,INTERVAL -7 DAY) -- MON -> MON
                                 WHEN 1 THEN date_add(expiry,INTERVAL -7 DAY) -- TUE -> TUE
                                 WHEN 2 THEN date_add(expiry,INTERVAL -7 DAY) -- WED -> WED
                                 WHEN 3 THEN date_add(expiry,INTERVAL -7 DAY) -- THU -> THU
                                 WHEN 4 THEN date_add(expiry,INTERVAL -7 DAY) -- FRI -> FRI
                                 WHEN 5 THEN date_add(expiry,INTERVAL -8 DAY) -- SAT -> FRI
                                 WHEN 6 THEN date_add(expiry,INTERVAL -9 DAY) -- SUN -> FRI
                                 END
                                ) as notification_weekday
FROM pwd_expiry ;

这会计算密码到期的星期几和基于此的通知的星期几。我不确定我的时间是否正确 - 但你应该可以在那里工作。基本上，它会根据到期日的星期几为通知创建不同的日偏移量。一旦你将WHE WHEN拉入你的WHERE状态，你就应该好好去。不仅要返回用户名，还要返回实际的到期日期，最好包含此通知电子邮件。

随着小提琴的死亡 - 这将是输入：

+-------+---------------------+
| user  | expiry              |
+-------+---------------------+
| jan   | 2015-12-25 00:00:00 |
| xplod | 2015-12-31 00:00:00 |
+-------+---------------------+

将输出：

+---------------------+----------------+-------+---------------------+----------------------+
| expiry              | expiry_weekday | user  | notification_date   | notification_weekday |
+---------------------+----------------+-------+---------------------+----------------------+
| 2015-12-25 00:00:00 | Friday         | jan   | 2015-12-18 00:00:00 | Friday               |
| 2015-12-31 00:00:00 | Thursday       | xplod | 2015-12-24 00:00:00 | Thursday             |
+---------------------+----------------+-------+---------------------+----------------------+

如何在5个工作日之前发送帐户到期的电子邮件通知

2 个答案: