Tool class - send mail (send via JavaMail)

　　Some time ago, I used the alarm information of mail sending monitoring in my work. Today, I will record the mail tool class of JavaMail here.

　　The following is the pom dependency of the JavaMail jar package used. The version 1.4.6 of JavaMail is used here.

<dependency>
　　<groupId>javax.mail</groupId>
　　<artifactId>mail</artifactId>
　　<version>1.4.6</version>
</dependency>

　　Here is the entity class of some parameter objects of the mail used in the tool class.　　

package com.juihai.entity;

import java.util.Arrays;

public  class EmailTO {
     private String title;//Mail subject
     private String content;//Mail content
     private String sender;//Sender account
     private String password;//Sender password
     private String host;//Outgoing email server
     private String[] toAdress;//Recipient address
     public String getTitle() {
         return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
    public String getSender() {
        return sender;
    }
    public  void setSender (String sender) {
         this .sender = sender;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getHost() {
        return host;
    }
    public void setHost(String host) {
        this.host = host;
    }
    public String[] getToAdress() {
        return toAdress;
    }
    public void setToAdress(String[] toAdress) {
        this.toAdress = toAdress;
    }
    @Override
    public String toString() {
        return "EmailTO [title=" + title + ", content=" + content + ", sender="
                + sender + ", password=" + password + ", host=" + host
                + ", toAdress=" + Arrays.toString(toAdress) + "]";
    }
    
    
}

　　Here is the tool class for sending Email. Specify comments in the code of the piece.

import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import org.apache.log4j.Logger;

import com.juihai.entity.EmailTO;

public  class SendEmailUtils {
     / **日志 输出* / 
    private  static Logger log = Logger.getLogger (SendEmailUtils. class );

    public static boolean send(EmailTO to) throws GeneralSecurityException{

        final String user = to.getSender();
        final String password = to.getPassword();
        log.info("SendEmailUtils >>>> Start Send Mail");
        Properties properties = System.getProperties(); // Get system properties 
        properties.setProperty("mail.smtp.host", to.getHost()); // Set the mail server "smtp.163.com", this is the sender person's mailbox server 
        properties.put("mail.smtp.auth", "true" );
        String senderNick = null ;
　　　　　
　　　　　//Some mailbox servers need to enable SSL verification before they can send emails. If necessary, enable comments./*　
         MailSSLSocketFactory sf = new MailSSLSocketFactory();// SSL verification begin
        sf.setTrustAllHosts(true);
        properties.put("mail.smtp.ssl.enable", "true");
        properties.put("mail.smtp.ssl.socketFactory", sf);// SSL验证 end*/
        
        Session session = Session.getDefaultInstance(properties,
                 new Authenticator() {
                     public PasswordAuthentication getPasswordAuthentication() {
                         return  new PasswordAuthentication(user, password); // sender email username, password 
                    }
                });
        try {
            MimeMessage message = new MimeMessage(session); // Create a default MimeMessage object 
            senderNick = javax.mail.internet.MimeUtility.encodeText("Juihai" ); //Set the sender nickname  
            message.setFrom( new InternetAddress(senderNick+"< "+user+">" ));
            
            // message.addRecipient(Message.RecipientType.TO,new InternetAddress()); // Create a single recipient 
            String[] tos = to.getToAdress(); // Create multiple recipients 
            if (tos != null && tos.length != 0 ) {
                InternetAddress[] toAddress = new InternetAddress[tos.length];
                for (int i = 0; i < tos.length; i++) {
                    toAddress[i] = new InternetAddress(tos[i]);
                }
                message.setRecipients(Message.RecipientType.TO, toAddress);
            }
            message.setSubject(to.getTitle()); // Set the email subject
             // message.setText(content); // Send plain text content 
            message.setContent(to.getContent(), "text/html;charset=utf- 8"); // Send html mail content 
            
            Transport.send(message); // Send Email 
            log.info("SendEmailUtils mail sent successfully" );
             return  true ;
        }catch (MessagingException mex) {
            mex.printStackTrace();
            log.info( " >>>>SendEmailUtils failed to send mail"+ mex);
        } catch (UnsupportedEncodingException e) {
            log.info( " >>>>SendEmailUtils failed to send mail - set sender nickname error"+ e);
            e.printStackTrace ();
        }
        return false;
    }
}