java ส่ง email เข้า gmail ด้วย spring framewok(java send email to gmail with spring framework)

package com.blogspot.na5cent;

import java.io.File;
import java.util.Properties;
import javax.activation.CommandMap;
import javax.activation.MailcapCommandMap;
import javax.mail.internet.MimeMessage;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

public class EmailSender {

    private static final String SMTP_HOST_NAME = "smtp.gmail.com";
    private static final String SMTP_AUTH_USER = "SENDER_EMAIL";
    private static final String SMTP_AUTH_PWD = "SENDER_PASSWORD";
    private static final String emailTarget = "RECEIVER_EMAIL";
    private static final String emailSubject = "test send email";
    private static final String emailFromAddress = "SENDER_EMAIL";
    private static final String emailMessage = "test!!!";

    public static void main(String args[]) throws Exception {
        MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap();
        mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
        mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
        mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
        mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
        mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
        CommandMap.setDefaultCommandMap(mc);




        JavaMailSenderImpl sender = new JavaMailSenderImpl();
        Properties pro = new Properties();
//       pro.setProperty("mail.smtps.host", SMTP_HOST_NAME);
//       pro.setProperty("mail.smtp.port", "465");
        pro.setProperty("mail.smtps.auth", "true");
        pro.setProperty("mail.smtps.starttls.enable", "true");
        pro.setProperty("mail.debug", "true");

        sender.setJavaMailProperties(pro);
        sender.setUsername(SMTP_AUTH_USER);
        sender.setPassword(SMTP_AUTH_PWD);
        sender.setProtocol("smtps");
        sender.setPort(465);
        sender.setHost(SMTP_HOST_NAME);
        sender.setDefaultEncoding("utf-8");

        MimeMessage message = sender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message, true);

        helper.setSubject(emailSubject);
        helper.setFrom(emailFromAddress);
        helper.setText(emailMessage);
        File part = new File("c:\\temp\\");  //ส่งไฟล์ภาพไปด้วย
        FileSystemResource file = new FileSystemResource(new File(part, "Koala.jpg"));
        helper.addAttachment("Koala.jpg", file);

        helper.setTo(emailTarget);
        sender.send(message);
    }
}

เรามาลองเขียนเป็น component email กันดีกว่าครับ
1. ให้เพิ่ม config ต่อไปนี้ลงใน applicationContext.xml ของ spring framework

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
    <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host" value="smtp.gmail.com"/>
        <property name="port" value="465"/>
        <property name="protocol" value="smtps"/>
        <property name="username" value="YOUR_EMAIL_SENDING"/>
        <property name="password" value="YOUR_PASSWORD_SENDING"/>
        <property name="defaultEncoding" value="UTF-8"/>
        <property name="javaMailProperties">
            <props>
                <prop key="mail.smtps.auth">true</prop>
                <prop key="mail.smtps.starttls.enable">true</prop>
                <prop key="mail.debug">true</prop>
            </props>
        </property>
    </bean>
</beans>

2. เขียน component Email

package com.blogspot.na5cent.email;

import java.util.List;
import javax.mail.internet.MimeMessage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import th.co.geniustree.nhso.deficientdrugs.forum.model.UserForum;
import th.co.geniustree.nhso.deficientdrugs.forum.repository.UserForumRepo;

/**
 *
 * @author Redcrow
 */
@Component
public class ForgetPasswordEmail {

    static {
        MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap();
        mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
        mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
        mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
        mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
        mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
        CommandMap.setDefaultCommandMap(mc);
    }

    @Autowired //เป็นการเรียกใช้งาน config file email ใน applicationContext.xml
    private JavaMailSenderImpl mailSender;
    @Autowired //ใช้งาน database
    private UserForumRepo userForumRepo;

    public boolean send(String userName) {
        boolean success = false;
        try {
            MimeMessage message = mailSender.createMimeMessage();
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            List<UserForum> users = userForumRepo.findByUserName(userName);
            if (users.size() != 1) {
                return false;
            }

            UserForum user = users.get(0);
            helper.setTo(user.getEmail());
            helper.setSubject("แจ้งรหัสผ่าน");
            helper.setText("ผู้ใช้ : " + user.getFullName() + "<br/>UserName : " + user.getUserName() + "<br/>Password : " + user.getPassword(), true);
            mailSender.send(message);
            success = true;
        } catch (Exception ex) {
            success = false;
        } finally {
            return success;
        }
    }
}

3. การเรียกใช้งาน (ผ่าน JSF Managed Bean)

@ManagedBean
@RequestScoped
public class ForgetPasswordMB {

    private static final Logger LOG = LoggerFactory.getLogger(ForgetPasswordMB.class);
    private String userName;
    private ForgetPasswordEmail email;

    @PostConstruct
    public void postConstruct() {
        email = JSFSpringUtils.getBean(ForgetPasswordEmail.class);
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public void onSendEmail() {
        if (email.send(userName)) {
            Notifications.message(Notifications.INFO, "ส่งรหัสผ่านเข้า email ของผู้ใช้", "เรียบร้อย");
        } else {
            Notifications.message(Notifications.WARN, "ส่งรหัสผ่านเข้า email ของผู้ใช้", "ล้มเหลว");
        }
    }
}

        เราสามารถสร้าง template email สวยๆได้ ซึ่งในที่นี้ผมจะใช้  FreeMarker template engine เข้ามาช่วยครับ  อยากได้สวยแค่ไหน  ยังไงก็ขึ้นอยู่กับความ Art ของแต่ละคนครับ

เรียนรู้ได้ในหัวข้อ  สร้าง template email ด้วย freemarker template engine : java