Use SpringSource Javax Mail framework to implement the skills of email batch sending
Use SpringSource Javax Mail framework to implement the skills of email batch sending
Overview:
When developing applications, sometimes you need to send emails to multiple recipients instead of sending one by one.Based on the Javax Mail framework based on SpringSource, you can easily implement the batch sending of the mail.This article will introduce how to use this framework to realize the skills of sending emails in batches.
step:
1. Add dependencies:
First, you need to add the Javax Mail framework to the project construction file.You can add the following dependencies to the pom.xml file:
<dependencies>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>javax.mail-api</artifactId>
<version>1.6.2</version>
</dependency>
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.6.2</version>
</dependency>
</dependencies>
2. Create mail sending class:
In order to realize the email in batches, you can create an email sending class.This class should include the following methods:
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;
public class EmailSender {
public void sendEmails(String[] recipients, String subject, String messageContent) throws MessagingException {
// Set SMTP server information
Properties properties = new Properties();
properties.put("mail.smtp.auth", "true");
properties.put("mail.smtp.starttls.enable", "true");
properties.put("mail.smtp.host", "your_smtp_host");
properties.put("mail.smtp.port", "your_smtp_port");
// Create the meeting
Session session = Session.getInstance(properties, new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("your_email", "your_password");
}
});
// Create mail
MimeMessage message = new MimeMessage(session);
message.setSubject(subject);
message.setContent(messageContent, "text/html; charset=utf-8");
// Add the recipient
for (String recipient : recipients) {
message.addRecipient(Message.RecipientType.TO, new InternetAddress(recipient));
}
// send email
Transport.send(message);
}
}
3. Call the email sending class:
Now you can call the email sending class in the application to send the email in batches.For example, you can use the following code to call the Sendemails () method:
public class Main {
public static void main(String[] args) {
try {
String[] recipients = {"recipient1@example.com", "recipient2@example.com", "recipient3@example.com"};
String subject = "Mail theme";
String messageContent = "Mail Content";
EmailSender emailSender = new EmailSender();
emailSender.sendEmails(recipients, subject, messageContent);
System.out.println ("Mail sending successfully!");
} catch (MessagingException e) {
System.out.println ("Email sending failure:" + e.getMessage ());
}
}
}
Summarize:
Using SpringSource's Javax Mail framework, you can easily implement the function of sending emails in batches.By adding the required dependencies, create a mail sending class and calling its method, you can send emails to multiple recipients at the same time.I hope the techniques provided in this article will help you implement email batch sending.
