Java實作郵箱發送（阿里云郵箱推送）

系結阿里云域名，創建域名賬戶，并配置決議域名賬戶，獲得發送郵箱的權限，上限兩百封，超出要￥…

• 阿里云郵件推送控制臺
• https://www.aliyun.com/product/directmail
• 申請郵箱并決議域名
• https://yq.aliyun.com/articles/707997

1. 郵箱資訊物體類

package cn.bitqian.mail.test;

/**
 * 郵件內容物體類
 * @author echo lovely
 * @date 2020/9/18 15:47
 */
public class MailInfo {

    // 發件人賬戶
    private String sendEmailAccount;

    // 發件人密碼
    private String sendEmailPassword;

    // 收件人賬戶
    private String receiveMailAccount;

    // 發送人姓名
    private String sendPersonName;

    // 收件人姓名
    private String receivePersonName;

   // 郵件標題
    private String mailTitle;

    // 郵件正文
    private String mailContent;

    public MailInfo(String sendEmailAccount, String sendEmailPassword, String receiveMailAccount,
                    String sendPersonName, String receivePersonName,
                    String mailTitle, String mailContent) {
        this.sendEmailAccount = sendEmailAccount;
        this.sendEmailPassword = sendEmailPassword;
        this.receiveMailAccount = receiveMailAccount;
        this.sendPersonName = sendPersonName;
        this.receivePersonName = receivePersonName;
        this.mailTitle = mailTitle;
        this.mailContent = mailContent;
    }

    public String getSendEmailAccount() {
        return sendEmailAccount;
    }

    public void setSendEmailAccount(String sendEmailAccount) {
        this.sendEmailAccount = sendEmailAccount;
    }

    public String getSendEmailPassword() {
        return sendEmailPassword;
    }

    public void setSendEmailPassword(String sendEmailPassword) {
        this.sendEmailPassword = sendEmailPassword;
    }

    public String getReceiveMailAccount() {
        return receiveMailAccount;
    }

    public void setReceiveMailAccount(String receiveMailAccount) {
        this.receiveMailAccount = receiveMailAccount;
    }

    public String getMailTitle() {
        return mailTitle;
    }

    public void setMailTitle(String mailTitle) {
        this.mailTitle = mailTitle;
    }

    public String getMailContent() {
        return mailContent;
    }

    public void setMailContent(String mailContent) {
        this.mailContent = mailContent;
    }

    public String getSendPersonName() {
        return sendPersonName;
    }

    public void setSendPersonName(String sendPersonName) {
        this.sendPersonName = sendPersonName;
    }

    public String getReceivePersonName() {
        return receivePersonName;
    }

    public void setReceivePersonName(String receivePersonName) {
        this.receivePersonName = receivePersonName;
    }
}

2. jar包依賴

 <dependency>
   <groupId>junit</groupId>
   <artifactId>junit</artifactId>
   <version>4.11</version>
   <scope>test</scope>
 </dependency>

 <!-- mail dependency -->
 <dependency>
   <groupId>com.sun.mail</groupId>
   <artifactId>javax.mail</artifactId>
   <version>1.6.2</version>
 </dependency>

3. 發送郵箱實作

注意：
	1. 更改下面的屬性，與物體類對應

代碼實作

package cn.bitqian.mail.test;

import org.junit.Test;

import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Date;
import java.util.Properties;


/**
 * 郵件發送工具類
 * @author echo lovely
 * @date 2020/9/18 15:54
 */
public class MailSendUtils {

    // 郵箱smtp協議 這里是使用阿里云的
    public static final String myEmailSMTPHost = "smtpdm.aliyun.com";

    @Test
    public void test() {
        MailInfo mailInfo = new MailInfo("控制臺所系結的郵箱賬戶名",
                "系結賬戶郵箱密碼",
                "收件人郵箱名", "發件人姓名",
                "收件人姓名", "郵箱標題", "郵箱內容");
        try {
            sendEmail(mailInfo);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void sendEmail(MailInfo mailInfo) throws Exception {

        // 1. 創建引數配置, 用于連接郵件服務器的引數配置
        Properties props = new Properties();                    // 引數配置
        props.setProperty("mail.transport.protocol", "smtp");   // 使用的協議（JavaMail規范要求）
        props.setProperty("mail.smtp.host", myEmailSMTPHost);   // 發件人的郵箱的 SMTP 服務器地址
        props.setProperty("mail.smtp.auth", "true");            // 需要請求認證

        // 2. 根據配置創建會話物件, 用于和郵件服務器互動
        Session session = Session.getInstance(props);
        session.setDebug(true);                                 // 設定為debug模式, 可以查看詳細的發送 log

        // 3. 創建一封郵件
        MimeMessage message = new MailSendUtils().createMimeMessage(session, mailInfo);

        // 4. 根據 Session 獲取郵件傳輸物件
        Transport transport = session.getTransport();

        // 5. 使用 郵箱賬號 和 密碼 連接郵件服務器, 這里認證的郵箱必須與 message 中的發件人郵箱一致, 否則報錯
        transport.connect(mailInfo.getSendEmailAccount(), mailInfo.getSendEmailPassword());

        // 6. 發送郵件, 發到所有的收件地址, message.getAllRecipients() 獲取到的是在創建郵件物件時添加的所有收件人, 抄送人, 密送人
        transport.sendMessage(message, message.getAllRecipients());

        // 7. 關閉連接
        transport.close();
    }

	
    public MimeMessage createMimeMessage(Session session, MailInfo mailInfo) throws Exception {
        // 1. 創建一封郵件
        MimeMessage message = new MimeMessage(session);

        // 2. From: 發件人（昵稱有廣告嫌疑，避免被郵件服務器誤認為是濫發廣告以至回傳失敗，請修改昵稱）
        message.setFrom(new InternetAddress(mailInfo.getSendEmailAccount(), mailInfo.getSendPersonName(), "UTF-8"));

        // 3. To: 收件人（可以增加多個收件人、抄送、密送）
        message.setRecipient(MimeMessage.RecipientType.TO,
                new InternetAddress(mailInfo.getReceiveMailAccount(), mailInfo.getReceivePersonName(), "UTF-8"));

        // 4. Subject: 郵件主題（標題有廣告嫌疑，避免被郵件服務器誤認為是濫發廣告以至回傳失敗，請修改標題）
        message.setSubject(mailInfo.getMailTitle(), "UTF-8");

        // 5. Content: 郵件正文（可以使用html標簽）（內容有廣告嫌疑，避免被郵件服務器誤認為是濫發廣告以至回傳失敗，請修改發送內容）
        message.setContent(mailInfo.getMailContent(), "text/html;charset=UTF-8");

        // 6. 設定發件時間
        message.setSentDate(new Date());

        // 7. 保存設定
        message.saveChanges();

        return message;
    }

}