BAEL-3964 HTML emails with Thymeleaf and FreeMarker (#9119)

spring-mvc-basics-2/src/main/java/com/baeldung/spring/mail/EmailServiceImpl.java

@@ -1,26 +1,49 @@
 package com.baeldung.spring.mail;
 
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.core.io.FileSystemResource;
-import org.springframework.mail.MailException;
-import org.springframework.mail.SimpleMailMessage;
-import org.springframework.mail.javamail.JavaMailSender;
-import org.springframework.mail.javamail.MimeMessageHelper;
-import org.springframework.stereotype.Component;
-
 import java.io.File;
+import java.io.IOException;
+import java.util.Map;
 
 import javax.mail.MessagingException;
 import javax.mail.internet.MimeMessage;
 
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.core.io.Resource;
+import org.springframework.mail.MailException;
+import org.springframework.mail.SimpleMailMessage;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.mail.javamail.MimeMessageHelper;
+import org.springframework.stereotype.Service;
+import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
+import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;
+import org.thymeleaf.context.Context;
+import org.thymeleaf.spring4.SpringTemplateEngine;
+
+import freemarker.template.Template;
+import freemarker.template.TemplateException;
+
 /**
  * Created by Olga on 7/15/2016.
  */
-@Component
+@Service("EmailService")
 public class EmailServiceImpl implements EmailService {
 
     @Autowired
     public JavaMailSender emailSender;
+    
+    @Autowired
+    public SimpleMailMessage template;
+    
+    @Autowired
+    private SpringTemplateEngine thymeleafTemplateEngine;
+    
+    @Autowired
+    private FreeMarkerConfigurer freemarkerConfigurer;
+    
+    @Value("classpath:/mail-logo.png")
+    Resource resourceFile;
 
     public void sendSimpleMessage(String to, String subject, String text) {
         try {
@@ -38,9 +61,8 @@ public class EmailServiceImpl implements EmailService {
     @Override
     public void sendSimpleMessageUsingTemplate(String to,
                                                String subject,
-                                               SimpleMailMessage template,
-                                               String ...templateArgs) {
-        String text = String.format(template.getText(), templateArgs);  
+                                               String ...templateModel) {
+        String text = String.format(template.getText(), templateModel);  
         sendSimpleMessage(to, subject, text);
     }
 
@@ -66,4 +88,42 @@ public class EmailServiceImpl implements EmailService {
             e.printStackTrace();
         }
     }
+    
+
+    @Override
+    public void sendMessageUsingThymeleafTemplate(
+        String to, String subject, Map<String, Object> templateModel)
+            throws MessagingException {
+                
+        Context thymeleafContext = new Context();
+        thymeleafContext.setVariables(templateModel);
+        
+        String htmlBody = thymeleafTemplateEngine.process("template-thymeleaf.html", thymeleafContext);
+
+        sendHtmlMessage(to, subject, htmlBody);
+    }
+
+    @Override
+    public void sendMessageUsingFreemarkerTemplate(
+        String to, String subject, Map<String, Object> templateModel)
+            throws IOException, TemplateException, MessagingException {
+
+        Template freemarkerTemplate = freemarkerConfigurer.createConfiguration().getTemplate("template-freemarker.ftl");
+        String htmlBody = FreeMarkerTemplateUtils.processTemplateIntoString(freemarkerTemplate, templateModel);
+
+        sendHtmlMessage(to, subject, htmlBody);
+    }
+    
+    private void sendHtmlMessage(String to, String subject, String htmlBody) throws MessagingException {
+
+        MimeMessage message = emailSender.createMimeMessage();
+        MimeMessageHelper helper = new MimeMessageHelper(message, true, "UTF-8");
+        helper.setTo(to);
+        helper.setSubject(subject);
+        helper.setText(htmlBody, true);
+        helper.addInline("attachment.png", resourceFile);
+        emailSender.send(message);
+
+    }
+   
 }