[Java] 利用Spring 透過office 365發出電郵

之前都有寫過利用C# , PowerShell 及Java 的 MimeMessage 去傳送電郵. 在此利用Sprint 去發出電郵. 方法如下.

1. 建立 application.properties 並輸入以下內容.

   # SMTP Settings.
   spring.mail.host=smtp.office365.com
   spring.mail.username=<<User Name>>
   spring.mail.password=<<Password>>
   spring.mail.properties.mail.transport.protocol=smtp
   spring.mail.properties.mail.smtp.port=587
   spring.mail.properties.mail.smtp.auth=true
   spring.mail.properties.mail.smtp.starttls.enable=true
   

2. 建立 MailController.java 並輸入以下內容.

   import java.util.List;
   
   import javax.mail.Message;
   import javax.mail.internet.InternetAddress;
   import javax.mail.internet.MimeMessage;
   
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.core.io.ClassPathResource;
   import org.springframework.mail.javamail.JavaMailSender;
   import org.springframework.mail.javamail.JavaMailSenderImpl;
   import org.springframework.mail.javamail.MimeMessageHelper;
   import org.springframework.stereotype.Controller;
   import org.springframework.util.CollectionUtils;
   
   import com.microsoft.sqlserver.jdbc.StringUtils;
   
   @Controller
   public class MailController {
   	@Autowired
   	private JavaMailSender sender;
   
   	private static String EMAIL_FROM_ADDRESS="[email protected]";
   	
   	public boolean sendEmail(String toAddress, String subject, String body) throws Exception {
   		return this.sendEmail(toAddress, subject, body, StringUtils.EMPTY, null);
   	}
   
   	public boolean sendEmail(String toAddress, String subject, String body, String ccAddress) throws Exception {
   		return this.sendEmail(toAddress, subject, body, ccAddress, null);
   	}
   
   	public boolean sendEmail(String toAddress, String subject, String body, String ccAddress,
   			List<ClassPathResource> attachments) throws Exception {
   		boolean result = false;
   		try {
   			MimeMessage message = sender.createMimeMessage();
   			MimeMessageHelper helper = new MimeMessageHelper(message, true);
   			
   			helper.setFrom(EMAIL_FROM_ADDRESS);
   			message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(toAddress));
   			helper.setSubject(subject);
   			helper.setText(body, true);
   			
   			if (StringUtils.isEmpty(ccAddress) == false)
   				message.setRecipients(Message.RecipientType.CC, InternetAddress.parse(ccAddress));
   			
   			if (CollectionUtils.isEmpty(attachments) == false) {
   				attachments.forEach(attachment -> {
   					try {
   						helper.addAttachment(attachment.getFilename(), attachment);
   					} catch (Exception ex) {
   						ex.printStackTrace();
   					}
   				});
   			}
   			sender.send(message);
   			result = true;
   		} catch (Exception ex) {
   			throw (ex);
   		}
   		return result;
   	}
   
   }