电子邮件

import org.springframework.mail.MailException;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;

public class SimpleOrderManager implements OrderManager {

	private MailSender mailSender;
	private SimpleMailMessage templateMessage;

	public void setMailSender(MailSender mailSender) {
		this.mailSender = mailSender;
	}

	public void setTemplateMessage(SimpleMailMessage templateMessage) {
		this.templateMessage = templateMessage;
	}

	public void placeOrder(Order order) {

		// Do the business calculations...

		// Call the collaborators to persist the order...

		// Create a thread-safe "copy" of the template message and customize it
		SimpleMailMessage msg = new SimpleMailMessage(this.templateMessage);
		msg.setTo(order.getCustomer().getEmailAddress());
		msg.setText(
			"Dear " + order.getCustomer().getFirstName()
				+ order.getCustomer().getLastName()
				+ ", thank you for placing order. Your order number is "
				+ order.getOrderNumber());
		try {
			this.mailSender.send(msg);
		}
		catch (MailException ex) {
			// simply log it and go on...
			System.err.println(ex.getMessage());
		}
	}

}

<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
	<property name="host" value="mail.mycompany.example"/>
</bean>

<!-- this is a template message that we can pre-load with default state -->
<bean id="templateMessage" class="org.springframework.mail.SimpleMailMessage">
	<property name="from" value="[email protected]"/>
	<property name="subject" value="Your order"/>
</bean>

<bean id="orderManager" class="com.mycompany.businessapp.support.SimpleOrderManager">
	<property name="mailSender" ref="mailSender"/>
	<property name="templateMessage" ref="templateMessage"/>
</bean>

import jakarta.mail.Message;
import jakarta.mail.MessagingException;
import jakarta.mail.internet.InternetAddress;
import jakarta.mail.internet.MimeMessage;

import jakarta.mail.internet.MimeMessage;
import org.springframework.mail.MailException;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessagePreparator;

public class SimpleOrderManager implements OrderManager {

	private JavaMailSender mailSender;

	public void setMailSender(JavaMailSender mailSender) {
		this.mailSender = mailSender;
	}

	public void placeOrder(final Order order) {
		// Do the business calculations...
		// Call the collaborators to persist the order...

		MimeMessagePreparator preparator = new MimeMessagePreparator() {
			public void prepare(MimeMessage mimeMessage) throws Exception {
				mimeMessage.setRecipient(Message.RecipientType.TO,
						new InternetAddress(order.getCustomer().getEmailAddress()));
				mimeMessage.setFrom(new InternetAddress("[email protected]"));
				mimeMessage.setText("Dear " + order.getCustomer().getFirstName() + " " +
						order.getCustomer().getLastName() + ", thanks for your order. " +
						"Your order number is " + order.getOrderNumber() + ".");
			}
		};

		try {
			this.mailSender.send(preparator);
		}
		catch (MailException ex) {
			// simply log it and go on...
			System.err.println(ex.getMessage());
		}
	}

}