Java实现发送带附件的邮件信息_java 实现发送邮件附件

1、添加依赖

创建project我们就不介绍了，直接上代码：

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

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2、代码实现

import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
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 EmailTest {

    public static void main(String[] args) {
        String to = "收件人邮箱";
        String from = "发件人邮箱";
        String host = "SMTP服务器地址";
        String username = "发件人邮箱用户名";
        String password = "发件人邮箱密码";
        String filePath = "附件文件路径";

        Properties properties = System.getProperties();
        properties.setProperty("mail.smtp.host", host);
        properties.setProperty("mail.smtp.auth", "true");

        Session session = Session.getDefaultInstance(properties, new javax.mail.Authenticator() {
            protected javax.mail.PasswordAuthentication getPasswordAuthentication() {
                return new javax.mail.PasswordAuthentication(username, password);
            }
        });

        try {
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(from));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
            message.setSubject("带附件的邮件");

            MimeBodyPart textBodyPart = new MimeBodyPart();
            textBodyPart.setText("这是一封带附件的邮件");

            MimeBodyPart attachmentBodyPart = new MimeBodyPart();
            DataSource source = new FileDataSource(filePath);
            attachmentBodyPart.setDataHandler(new DataHandler(source));
            attachmentBodyPart.setFileName("附件文件名");

            Multipart multipart = new MimeMultipart();
            multipart.addBodyPart(textBodyPart);
            multipart.addBodyPart(attachmentBodyPart);

            message.setContent(multipart);

            Transport.send(message);
            System.out.println("邮件已发送");
        } catch (AddressException e) {
            e.printStackTrace();
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}

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