通过java在特定日期自动发送邮件
我正在使用 Java 邮件 API 通过我的 java 应用程序发送电子邮件。但我想在未来的日期自动发送它，即每个月/每年的任何特定日期。我已经使用我的 ISP 的 SMTP 服务器在上述 id 上发送电子邮件。我在网上引用了以下可用示例。如何在此处设置任何特定日期。我已尝试 SimpleDateFormat 并在此处设置它，但它仍然立即发送邮件，但将其发送日期设置为提到的特定日期。有没有其他方法可以在指定的日期和时间发送自动电子邮件？
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
// Send a simple, single part, text/plain e-mail
public class TestEmail {
public static void main(String[] args) {
// SUBSTITUTE YOUR EMAIL ADDRESSES HERE!!!
String to = "[email protected]";
String from = "[email protected]";
// SUBSTITUTE YOUR ISP'S MAIL SERVER HERE!!!
String host = "smtp.yourisp.net";
// Create properties, get Session
Properties props = new Properties();
// If using static Transport.send(),
// need to specify which host to send it to
props.put("mail.smtp.host", host);
// To see what is going on behind the scene
props.put("mail.debug", "true");
Session session = Session.getInstance(props);
try {
// Instantiatee a message
Message msg = new MimeMessage(session);
//Set message attributes
msg.setFrom(new InternetAddress(from));
InternetAddress[] address = {new InternetAddress(to)};
msg.setRecipients(Message.RecipientType.TO, address);
msg.setSubject("Test E-Mail through Java");
msg.setSentDate(new Date());
// Set message content
msg.setText("This is a test of sending a " +
"plain text e-mail through Java.\n" +
"Here is line 2.");
//Send the message
Transport.send(msg);
}
catch (MessagingException mex) {
// Prints all nested (chained) exceptions as well
mex.printStackTrace();
}
}
}//End of class
I am using Java mail API to send email through my java application. But I want to send it automatically on future date i.e. any specific date of every month/year. I have used my ISP's SMTP server to send email on mentioned id.I have referred the below available example on net. How to set any specific date here.I have tried SimpleDateFormat and set it here but it still sends mail immediately but set its sent date as mentioned specific date. Is there any other way to send automatic email on mentioned date and time?
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
// Send a simple, single part, text/plain e-mail
public class TestEmail {
public static void main(String[] args) {
// SUBSTITUTE YOUR EMAIL ADDRESSES HERE!!!
String to = "[email protected]";
String from = "[email protected]";
// SUBSTITUTE YOUR ISP'S MAIL SERVER HERE!!!
String host = "smtp.yourisp.net";
// Create properties, get Session
Properties props = new Properties();
// If using static Transport.send(),
// need to specify which host to send it to
props.put("mail.smtp.host", host);
// To see what is going on behind the scene
props.put("mail.debug", "true");
Session session = Session.getInstance(props);
try {
// Instantiatee a message
Message msg = new MimeMessage(session);
//Set message attributes
msg.setFrom(new InternetAddress(from));
InternetAddress[] address = {new InternetAddress(to)};
msg.setRecipients(Message.RecipientType.TO, address);
msg.setSubject("Test E-Mail through Java");
msg.setSentDate(new Date());
// Set message content
msg.setText("This is a test of sending a " +
"plain text e-mail through Java.\n" +
"Here is line 2.");
//Send the message
Transport.send(msg);
}
catch (MessagingException mex) {
// Prints all nested (chained) exceptions as well
mex.printStackTrace();
}
}
}//End of class
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为其配置
Quartz作业。使用cron触发器指定执行事件Configure
QuartzJob for it. Use cron trigger to specify the execution event如果您使用 EJB 3.0+ 容器，则可以轻松使用计时器服务。
您需要创建一个会话 bean，并实现
TimedObject接口或使用@Timeout注释方法。您可以通过getTimerService()从InitialContext获取TimerService的实例，然后使用createTimer( )变体。它可以采用一个时间间隔，或者一个指定过期时间的Date对象...If you're using an EJB 3.0+ container, you could easily use the timer service.
You need to make a session bean, and either implement the
TimedObjectinterface or annotate a method with@Timeout. You can get an instance of theTimerServicefrom theInitialContextviagetTimerService(), then create a timer with one of thecreateTimer()variants. It can take an interval, or aDateobject specifying when it expires...