This is the answer to https://stackoverflow.com/a/55185305/1733038

Author: Chris Wilson

apps/sparkpost-samples-app/src/main/java/com/sparkpost/samples/SendEmailTemplateSample.java

@@ -0,0 +1,138 @@
+
+package com.sparkpost.samples;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.log4j.Level;
+import org.apache.log4j.Logger;
+
+import com.sparkpost.Client;
+import com.sparkpost.exception.SparkPostException;
+import com.sparkpost.model.AddressAttributes;
+import com.sparkpost.model.RecipientAttributes;
+import com.sparkpost.model.TemplateContentAttributes;
+import com.sparkpost.model.TransmissionWithRecipientArray;
+import com.sparkpost.model.responses.Response;
+import com.sparkpost.resources.ResourceTransmissions;
+import com.sparkpost.sdk.samples.helpers.SparkPostBaseApp;
+import com.sparkpost.transport.IRestConnection;
+import com.sparkpost.transport.RestConnection;
+
+public class SendEmailTemplateSample extends SparkPostBaseApp {
+
+    static final Logger logger = Logger.getLogger(CreateTemplateSimple.class);
+
+    private Client client;
+
+    public static void main(String[] args) throws SparkPostException, IOException {
+        Logger.getRootLogger().setLevel(Level.DEBUG);
+
+        SendEmailTemplateSample sample = new SendEmailTemplateSample();
+        sample.runApp();
+    }
+
+    private void runApp() throws SparkPostException, IOException {
+        this.client = this.newConfiguredClient();
+
+        // Loads an email to send from the file system
+        String fromAddress = getFromAddress();
+        String[] recipients = getTestRecipients();
+
+        sendEmail(fromAddress, recipients);
+
+    }
+
+    private void sendEmail(String from, String[] recipients) throws SparkPostException {
+        TransmissionWithRecipientArray transmission = new TransmissionWithRecipientArray();
+
+        // Populate Recipients
+        List<RecipientAttributes> recipientArray = new ArrayList<RecipientAttributes>();
+        for (String recipient : recipients) {
+            RecipientAttributes recipientAttribs = new RecipientAttributes();
+            recipientAttribs.setAddress(new AddressAttributes(recipient));
+            recipientArray.add(recipientAttribs);
+        }
+        transmission.setRecipientArray(recipientArray);
+
+        // Populate Substitution Data
+        Map<String, Object> substitutionData = new HashMap<String, Object>();
+
+        substitutionData.put("yourContent", "You can add substitution data too.");
+        transmission.setSubstitutionData(substitutionData);
+
+        // You can use Jackson, GSON or whatever you standard JSON decoding library is to
+        // Build this structure.
+        List<Map<String, String>> offers = new ArrayList<Map<String, String>>();
+        for (int i = 0; i < 2; i++) {
+
+            Map<String, String> offer = new HashMap<String, String>();
+            offer.put("description", "description value " + i);
+            offer.put("discount", "discount " + i);
+            offer.put("image", "image " + i);
+            offer.put("image_announcer", "image_announcer " + i);
+            offer.put("alt_title", "alt_title " + i);
+            offer.put("tracking", "tracking " + i);
+            offer.put("name", "name " + i);
+            offer.put("id", "id " + i);
+            offer.put("announcer_paid", "announcer_paid " + i);
+            offer.put("announcer_image", "announcer_image " + i);
+            offer.put("announcer_alt_title", "announcer_alt_title " + i);
+
+            offers.add(offer);
+        }
+
+        substitutionData.put("offers", offers);
+
+        // Populate Email Body
+        TemplateContentAttributes contentAttributes = new TemplateContentAttributes();
+        contentAttributes.setFrom(new AddressAttributes(from));
+        contentAttributes.setSubject("☰ Your subject content here. {{yourContent}}");
+        contentAttributes.setText("You could do it for text too. See https://www.sparkpost.com/blog/advanced-email-templates/ for an example");
+        contentAttributes.setHtml(
+                "<b>Your Data:</b><br>\n"
+                        + "<table border='1'>\n"
+                        + "    <tr>\n"
+                        + "        <th>description</th>\n"
+                        + "        <th>discount</th>\n"
+                        + "        <th>image</th>\n"
+                        + "        <th>image_announcer</th>\n"
+                        + "        <th>alt_title</th>\n"
+                        + "        <th>tracking</th>\n"
+                        + "        <th>name</th>\n"
+                        + "        <th>id</th>\n"
+                        + "        <th>announcer_paid</th>\n"
+                        + "        <th>announcer_image</th>\n"
+                        + "        <th>announcer_alt_title</th>\n"
+                        + "    </tr>\n"
+                        + "    {{each offers}}    \n"
+                        + "        <tr>\n"
+                        + "            <td> {{{offers.description}}} </td>\n"
+                        + "            <td> {{{offers.discount}}} </td>\n"
+                        + "            <td> {{{offers.image}}} </td>\n"
+                        + "            <td> {{{offers.image_announcer}}} </td>\n"
+                        + "            <td> {{{offers.alt_title}}} </td>\n"
+                        + "            <td> {{{offers.tracking}}} </td>\n"
+                        + "            <td> {{{offers.name}}} </td>\n"
+                        + "            <td> {{{offers.id}}} </td>\n"
+                        + "            <td> {{{offers.announcer_paid}}} </td>\n"
+                        + "            <td> {{{offers.announcer_image}}} </td>\n"
+                        + "            <td> {{{offers.announcer_alt_title}}} </td>\n"
+                        + "        </tr>\n"
+                        + "    {{ end }} \n"
+                        + "</table>\n\n");
+        transmission.setContentAttributes(contentAttributes);
+
+        transmission.setContentAttributes(contentAttributes);
+
+        // Send the Email
+        IRestConnection connection = new RestConnection(this.client, getEndPoint());
+        Response response = ResourceTransmissions.create(connection, 0, transmission);
+
+        logger.debug("Transmission Response: " + response);
+    }
+
+}