Hello Friends, The Below code will show How you can send the mail using the mailing template in liferay.

view.jsp

<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<%@ taglib uri="http://liferay.com/tld/aui" prefix="aui" %>
<portlet:defineObjects />
<portlet:actionURL name="mailSenderTemplate" var="mailSenderTemplate"></portlet:actionURL>



<aui:form name="mailSenderTemplate" id="mailSenderTemplate" action="<%= mailSenderTemplate.toString() %>">
    <aui:input type="text" name="toemail" fieldParam="toemail" />
    <aui:input type="textarea" name="subject" fieldParam="subject" />

    <aui:input type="submit" value="Submit" name="" />
</aui:form>

Then create folder named templates inside src folder of your portlet. After that create the sample.tmpl file inside templates folder.

sample.tmpl

Hi [$NAME$],<br/><br/>

  [$DESC$]. <br/><br/>

Thanx & Regards:-<br/>
Manish Bohra<br/>

MailSender.java

package com.evon;

import javax.mail.internet.InternetAddress;
import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.ProcessAction;

import com.liferay.mail.service.MailServiceUtil;
import com.liferay.portal.kernel.mail.MailMessage;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.WebKeys;
import com.liferay.portal.theme.ThemeDisplay;
import com.liferay.util.ContentUtil;
import com.liferay.util.bridges.mvc.MVCPortlet;

public class MailSender extends MVCPortlet {

    @ProcessAction(name="mailSenderTemplate")  //sending  mail using template File
    public void mailSenderTemplate(ActionRequest actionRequest,ActionResponse actionResponse)
            {


                    System.out.println("Inside mailSender template   :");
                    System.out.println("---->"+ParamUtil.getString(actionRequest, "toemail"));
                    System.out.println("---->"+ParamUtil.getString(actionRequest, "subject"));
                    //System.out.println("---->"+ParamUtil.getString(actionRequest, "tomail"));
                try {
                    ThemeDisplay themeDisplay = (ThemeDisplay)actionRequest.getAttribute(WebKeys.THEME_DISPLAY);

                    InternetAddress toAddress = new InternetAddress(ParamUtil.getString(actionRequest, "toemail"));
                    InternetAddress fromAddress = new InternetAddress(themeDisplay.getCompany().getEmailAddress(), "DentalNoteBox");
                     String body = ContentUtil.get("/templates/sample.tmpl", true);  

                    // Here i have created a folder called content and also created file as sample.tmpl

                    String subject = ParamUtil.getString(actionRequest, "subject"); // email subject

                    body = StringUtil.replace(body, new String []{"[$NAME$]","[$DESC$]"}, new String []{"John","Hope you are doing good."}); // replacing the body with our content.

                    MailMessage mailMessage = new MailMessage();
                    mailMessage.setTo(toAddress);
                    mailMessage.setFrom(fromAddress);
                    mailMessage.setSubject(subject);
                    mailMessage.setBody(body);
                    mailMessage.setHTMLFormat(true);

                    MailServiceUtil.sendEmail(mailMessage); // Sending message

                } catch (Exception e) {
                    e.printStackTrace();

                }

            }

}