Java實現郵件發送

這裡我們以QQ郵箱為例。

一、導入依賴：

    <dependencies>
        <!-- https://mvnrepository.com/artifact/javax.activation/activation -->
        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.mail/mail -->
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.4.7</version>
        </dependency>
    </dependencies>

二、設置自己的QQ郵箱

 開啟以上兩項服務。

三、具體實現

import com.sun.mail.util.MailSSLSocketFactory;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

public class SendEmail {

    /* addressee:收件人郵箱
     *title:郵件標題標題
     *content:郵件內容
     */
    public static void send(String addressee, String title, String content) throws Exception {

        Properties prop = new Properties();
        prop.setProperty("mail.host", "smtp.qq.com");//郵件伺服器：QQ
        prop.setProperty("mail.transport.protocol", "smtp");//郵件發送協議：smtp
        prop.setProperty("mail.smtp.auth", "true");//需要驗證用戶名和密碼

        //QQ郵箱，還需要設置SSL加密
        MailSSLSocketFactory factory = new MailSSLSocketFactory();
        factory.setTrustAllHosts(true);
        prop.put("maim.smtp.ssl.enable", "true");
        prop.put("maim.smtp.ssl.socketFactory", factory);

        //javaMail發送email的五個步驟
        //1.定義一個整個應用環境需要的session對象
        Session session = Session.getDefaultInstance(prop, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("自己的郵箱", "授權碼");
            }
        });
        //開啟session的debug模式
        session.setDebug(true);
        //2.通過session得到transport對象
        Transport transport = session.getTransport();
        //3.使用郵箱用戶名和授權碼連接上伺服器
        transport.connect("smtp.qq.com", "自己的郵箱", 授權碼");
        //4.創建郵件
        //創建郵件對象
        MimeMessage message = new MimeMessage(session);
        //發郵件人
        message.setFrom(new InternetAddress("自己的郵箱"));
        //收件人 可以群發setRecipients
        message.setRecipient(Message.RecipientType.TO, new InternetAddress(addressee));
        //郵件標題
        message.setSubject(title);
        //郵件內容，前內容，後格式
        message.setContent(content, "text/html;charset=UTF-8");
        //5.發送郵件
        transport.sendMessage(message, message.getAllRecipients());
        //6.關閉連接
        transport.close();
    }
}

（本文僅作個人學習記錄用，如有紕漏敬請指正）