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Spring Boot and RESTful API(九)Email Sending

www.MyException.Cn  网友分享于:2013-10-11  浏览:0次
Spring Boot and RESTful API(9)Email Sending
Spring Boot and RESTful API(9)Email Sending

Add FreeMarker Plugin in Eclipse
http://tools.jboss.org/downloads/devstudio/oxygen/11.0.0.GA.html#marketplace

There are several html email templates
https://github.com/charlesmudy/responsive-html-email-template
https://github.com/leemunroe/responsive-html-email-template

pom.xml Configuration
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>  
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>

A Simple Service Class EmailNotificationServiceImpl.java

package com.sillycat.jobsmonitorapi.service;

import java.io.IOException;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;
import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
import freemarker.core.ParseException;import freemarker.template.Configuration;
import freemarker.template.MalformedTemplateNameException;
import freemarker.template.Template;import freemarker.template.TemplateException;
import freemarker.template.TemplateNotFoundException;

@Service
public class EmailNotificationServiceImpl implements EmailNotificationService {

@Autowiredprivate JavaMailSender mailSender;

public void sendTemplateMail(
    String templateName,
    String to,
    String title,
    Object model
) {
    MimeMessage mimeMessage = mailSender.createMimeMessage();
    MimeMessageHelper helper = null;
    try{
        helper = new MimeMessageHelper(mimeMessage, true);
    }    catch (MessagingException e) {
        e.printStackTrace();
    }
    // basic settings
    try{
        //helper.setFrom(from);
        helper.setTo(to);
        helper.setSubject(title);
    }    catch (MessagingException e) {
        e.printStackTrace();
    }

    Configuration cfg = new Configuration(Configuration.VERSION_2_3_23);
    cfg.setClassForTemplateLoading(this.getClass(), "/templates");
    Template template;
    try{
        template = cfg.getTemplate(templateName + ".ftl");
        String html = FreeMarkerTemplateUtils.processTemplateIntoString(template, model);
        helper.setText(html, true);
        mailSender.send(mimeMessage);
    }catch (TemplateNotFoundException e) {
        e.printStackTrace();
    } catch (MalformedTemplateNameException e) {
        e.printStackTrace();
    } catch (ParseException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (TemplateException e) {
        e.printStackTrace();
    } catch (MessagingException e) {
        e.printStackTrace();
    }
    }
}

The template file is large. I just copy that from one of the MIT lic free html template.
<!doctype html>
<html>
  <head>
    <meta name="viewport" content="width=device-width">
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Simple Transactional Email</title>
    <style>
    /* -------------------------------------
        INLINED WITH htmlemail.io/inline
    ------------------------------------- */
    /* -------------------------------------
        RESPONSIVE AND MOBILE FRIENDLY STYLES
    ------------------------------------- */
    @media only screen and (max-width: 620px) {
      table[class=body] h1 {
        font-size: 28px !important;
        margin-bottom: 10px !important;
      }
      table[class=body] p,
            table[class=body] ul,
            table[class=body] ol,
            table[class=body] td,
            table[class=body] span,
            table[class=body] a {
        font-size: 16px !important;
      }
      table[class=body] .wrapper,
            table[class=body] .article {
        padding: 10px !important;
      }
      table[class=body] .content {
        padding: 0 !important;
      }
      table[class=body] .container {
        padding: 0 !important;
        width: 100% !important;
      }
      table[class=body] .main {
        border-left-width: 0 !important;
        border-radius: 0 !important;
        border-right-width: 0 !important;
      }
      table[class=body] .btn table {
        width: 100% !important;
      }
      table[class=body] .btn a {
        width: 100% !important;
      }
      table[class=body] .img-responsive {
        height: auto !important;
        max-width: 100% !important;
        width: auto !important;
      }
    }

    /* -------------------------------------
        PRESERVE THESE STYLES IN THE HEAD
    ------------------------------------- */
    @media all {
      .ExternalClass {
        width: 100%;
      }
      .ExternalClass,
            .ExternalClass p,
            .ExternalClass span,
            .ExternalClass font,
            .ExternalClass td,
            .ExternalClass div {
        line-height: 100%;
      }
      .apple-link a {
        color: inherit !important;
        font-family: inherit !important;
        font-size: inherit !important;
        font-weight: inherit !important;
        line-height: inherit !important;
        text-decoration: none !important;
      }
      .btn-primary table td:hover {
        background-color: #34495e !important;
      }
      .btn-primary a:hover {
        background-color: #34495e !important;
        border-color: #34495e !important;
      }
    }
    </style>
  </head>
  <body class="" style="background-color: #f6f6f6; font-family: sans-serif; -webkit-font-smoothing: antialiased; font-size: 14px; line-height: 1.4; margin: 0; padding: 0; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;">
    <table border="0" cellpadding="0" cellspacing="0" class="body" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; width: 100%; background-color: #f6f6f6;">
      <tr>
        <td style="font-family: sans-serif; font-size: 14px; vertical-align: top;">&nbsp;</td>
        <td class="container" style="font-family: sans-serif; font-size: 14px; vertical-align: top; display: block; Margin: 0 auto; max-width: 580px; padding: 10px; width: 580px;">
          <div class="content" style="box-sizing: border-box; display: block; Margin: 0 auto; max-width: 580px; padding: 10px;">

            <!-- START CENTERED WHITE CONTAINER -->
            <span class="preheader" style="color: transparent; display: none; height: 0; max-height: 0; max-width: 0; opacity: 0; overflow: hidden; mso-hide: all; visibility: hidden; width: 0;">
            This is preheader text. Our goal and only goal is to find you a job.
            </span>
            <table class="main" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; width: 100%; background: #ffffff; border-radius: 3px;">

              <!-- START MAIN CONTENT AREA -->
              <tr>
                <td class="wrapper" style="font-family: sans-serif; font-size: 14px; vertical-align: top; box-sizing: border-box; padding: 20px;">
                  <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; width: 100%;">
                    <tr>
                      <td style="font-family: sans-serif; font-size: 14px; vertical-align: top;">
                        <p style="font-family: sans-serif; font-size: 14px; font-weight: normal; margin: 0; Margin-bottom: 15px;">
                        Hi
${userName}
,
                        </p>
                        <p style="font-family: sans-serif; font-size: 14px; font-weight: normal; margin: 0; Margin-bottom: 15px;">
                        Sometimes you just want to send a simple HTML email with a simple design and clear Find Your Job button. This is it.
                        </p>
                        <table border="0" cellpadding="0" cellspacing="0" class="btn btn-primary" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; width: 100%; box-sizing: border-box;">
                          <tbody>
                            <tr>
                              <td align="left" style="font-family: sans-serif; font-size: 14px; vertical-align: top; padding-bottom: 15px;">
                                <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; width: auto;">
                                  <tbody>
                                    <tr>
                                      <td style="font-family: sans-serif; font-size: 14px; vertical-align: top; background-color: #3498db; border-radius: 5px; text-align: center;">
                                      <a href="http://www.jobs2careers.com" target="_blank" style="display: inline-block; color: #ffffff; background-color: #3498db; border: solid 1px #3498db; border-radius: 5px; box-sizing: border-box; cursor: pointer; text-decoration: none; font-size: 14px; font-weight: bold; margin: 0; padding: 12px 25px; text-transform: capitalize; border-color: #3498db;">
                                      Find Your Job
                                      </a>
                                      </td>
                                    </tr>
                                  </tbody>
                                </table>
                              </td>
                            </tr>
                          </tbody>
                        </table>
                        <p style="font-family: sans-serif; font-size: 14px; font-weight: normal; margin: 0; Margin-bottom: 15px;">
                        This is a really simple email template. Its sole purpose is to get the recipient to click the button with no distractions.</p>
                        <p style="font-family: sans-serif; font-size: 14px; font-weight: normal; margin: 0; Margin-bottom: 15px;">
                        Good luck! Hope you find your job.
                        </p>
                      </td>
                    </tr>
                  </table>
                </td>
              </tr>

            <!-- END MAIN CONTENT AREA -->
            </table>

            <!-- START FOOTER -->
            <div class="footer" style="clear: both; Margin-top: 10px; text-align: center; width: 100%;">
              <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; width: 100%;">
                <tr>
                  <td class="content-block" style="font-family: sans-serif; vertical-align: top; padding-bottom: 10px; padding-top: 10px; font-size: 12px; color: #999999; text-align: center;">
                    <span class="apple-link" style="color: #999999; font-size: 12px; text-align: center;">
                    Company Inc, 6433 Champion Grandview Way Building 2 #100, Austin, TX 78750
                    </span>
                   
Don't like these emails?
                    <a href="#" style="text-decoration: underline; color: #999999; font-size: 12px; text-align: center;">
                    Unsubscribe
                    </a>.
                  </td>
                </tr>
                <tr>
                  <td class="content-block powered-by" style="font-family: sans-serif; vertical-align: top; padding-bottom: 10px; padding-top: 10px; font-size: 12px; color: #999999; text-align: center;">
                    Powered by Test
                  </td>
                </tr>
              </table>
            </div>
            <!-- END FOOTER -->

          <!-- END CENTERED WHITE CONTAINER -->
          </div>
        </td>
        <td style="font-family: sans-serif; font-size: 14px; vertical-align: top;">&nbsp;</td>
      </tr>
    </table>
  </body>
</html>

Here is the UNIT test
package
com.sillycat.jobsmonitorapi.service;

import java.util.HashMap;
import java.util.Map;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

/**
*
* mvn -Dtest=EmailNotificationServiceTest test
*
* @author carl
*
*/
@RunWith(SpringRunner.class)
@SpringBootTest
public class EmailNotificationServiceTest {

    @Autowired

    EmailNotificationService emailNotificationService;

    @Test
    public void testDummy() {
    }

    @Test
    public void testSendEmail(){
        String template = "CampaignOutOfBudgetDelayAlert";
        String to = "cluo@jobs2careers.com";
        String title = "Find You a Job";

        Map<String, String> model = new HashMap<String,String>();
        model.put("userName", "Carl");
        emailNotificationService.sendTemplateMail(template,to, title, model);
    }

}

References:
https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-email.html
https://www.quickprogrammingtips.com/spring-boot/how-to-send-email-from-spring-boot-applications.html

https://github.com/ZXingg/spring-boot-mail
https://github.com/zrbfree/spring-boot-mail
https://github.com/choonchernlim/spring-boot-mail
https://github.com/zrbfree/spring-boot-mail/blob/c69d834fff9c5cace8ce6c91373994bb82408a4f/src/test/java/com/rick/SpringBootMybatisApplicationTests.java

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