javamail에서 qq메일박스로 메일을 보내는 설정 방법

프로그램 포털: Test_Email_N.java

import java.io.IOException;
import java.util.Date;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
public class Test_Email_N {
    public static void  main(String args[]){
        try {
            send_email();
        }catch (Exception e) {
            e.printStackTrace();
        }
    }
    public static void send_email() throws IOException, AddressException, MessagingException{

        String to = "[email protected]";
        String subject = "subject";
        String content = "content";
        Properties properties = new Properties();
        properties.put("mail.smtp.host", "smtp.qq.com");
        properties.put("mail.smtp.port", "25");
        properties.put("mail.smtp.auth", "true");
        Authenticator authenticator = new Email_Authenticator("[email protected]", "password");
        javax.mail.Session sendMailSession = javax.mail.Session.getDefaultInstance(properties, authenticator);
        MimeMessage mailMessage = new MimeMessage(sendMailSession);
        mailMessage.setFrom(new InternetAddress("[email protected]"));
        // Message.RecipientType.TO TO
        mailMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
        mailMessage.setSubject(subject, "UTF-8");
        mailMessage.setSentDate(new Date());
        // MiniMultipart ， MimeBodyPart 
        Multipart mainPart = new MimeMultipart();
        //  HTML MimeBodyPart
        BodyPart html = new MimeBodyPart();
        html.setContent(content.trim(), "text/html; charset=utf-8");
        mainPart.addBodyPart(html);
        mailMessage.setContent(mainPart);
        Transport.send(mailMessage);
    }
}

그 중 의존하는jar 패키지는javax입니다.mail, 여기는 마븐이 관리하는 곳입니다. 마븐으로 직접 jar 패키지를 다운로드해도 됩니다.https://java.net/projects/javamail/pages/Homejar 패키지를 직접 다운로드합니다.

<dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.5.0-b01</version>
        </dependency>

Email_Authenticator.java, 여기는 Authenticator 클래스를 계승하여name,password를 봉인하는 데 사용됩니다.

package com.infomorrow.webtest.JuxinliTest.restdetect;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
public class Email_Authenticator extends Authenticator {
    String userName = null;
    String password = null;
    public Email_Authenticator() {
    }
    public Email_Authenticator(String username, String password) {
        this.userName = username;
        this.password = password;
    }
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(userName, password);
    }
}

설정이 이렇게 많으니 메일박스 비밀번호를 자신의 것으로 바꾸면 됩니다. 그렇지 않으면 오류가 발생할 수 있습니다.프로그램이 여기까지 오면 실행할 수 있습니다!
다음은 프로필 파일을 설정하여 계정 비밀번호를 관리하는 것입니다.
이메일을 새로 만듭니다.propertis 파일.
email.propertis:

mail.smtp.host=smtp.qq.com
mail.smtp.port=25
[email protected]
password=password

Test_Email.java 코드는 다음과 같이 변경됩니다.

package com.infomorrow.webtest.JuxinliTest.restdetect;

import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
public class Test_Email {
　　public static void main(String args[]){
        try {
            send_email();
        }catch (Exception e) {
            e.printStackTrace();
        }
    }
    public static void send_email() throws IOException, AddressException, MessagingException{

        String to = "[email protected]";
        String subject = "subject";// 
        String content = "content";// 
        Properties properties = new Properties();
        InputStream resourceAsStream = null;
        try {
             resourceAsStream = Object.class.getResourceAsStream("/email.properties");
            properties.load(resourceAsStream);
        } finally{
            if (resourceAsStream!=null) {
                resourceAsStream.close();
            }
        }
        System.err.println("properties:"+properties);
        properties.put("mail.smtp.host", properties.get("mail.smtp.host"));
        properties.put("mail.smtp.port", properties.get("mail.smtp.port"));
        properties.put("mail.smtp.auth", "true");
        Authenticator authenticator = new Email_Authenticator(properties.get("username").toString(), properties.get("password").toString());
        javax.mail.Session sendMailSession = javax.mail.Session.getDefaultInstance(properties, authenticator);
        MimeMessage mailMessage = new MimeMessage(sendMailSession);
        mailMessage.setFrom(new InternetAddress(properties.get("username").toString()));
        // Message.RecipientType.TO TO
        mailMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
        mailMessage.setSubject(subject, "UTF-8");
        mailMessage.setSentDate(new Date());
        // MiniMultipart ， MimeBodyPart 
        Multipart mainPart = new MimeMultipart();
        //  HTML MimeBodyPart
        BodyPart html = new MimeBodyPart();
        html.setContent(content.trim(), "text/html; charset=utf-8");
        mainPart.addBodyPart(html);
        mailMessage.setContent(mainPart);
        Transport.send(mailMessage);
    }
}

오케이, 여기까지.