java实现邮件带附件发送功能

需要引用的pom

    <dependency>
        <groupId>com.sun.mail</groupId>
        <artifactId>javax.mail</artifactId>
        <version>1.5.4</version>
    </dependency>

工具类代码

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

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;

import com.alibaba.druid.util.StringUtils;
import com.sun.mail.util.MailSSLSocketFactory;
/** * 发送邮件工具类 * * @author tp * */
public class SendMailAcceUtils {

    /** * 发送带附件的邮件 * * @param receive * 收件人 * @param subject * 邮件主题 * @param msg * 邮件内容 * @param filename * 附件地址 * @return * @throws GeneralSecurityException */
    public static boolean sendMail(String receive, String subject, String msg, String filename)
            throws GeneralSecurityException {
        if (StringUtils.isEmpty(receive)) {
            return false;
        }

        // 发件人电子邮箱
        final String from = "[e-mail]";
        // 发件人电子邮箱密码
        final String pass = "123456";

        // 指定发送邮件的主机为 smtp.qq.com
        String host = "smtp.163.com"; // 邮件服务器

        // 获取系统属性
        Properties properties = System.getProperties();

        // 设置邮件服务器
        properties.setProperty("mail.smtp.host", host);

        properties.put("mail.smtp.auth", "true");
        MailSSLSocketFactory sf = new MailSSLSocketFactory();
        sf.setTrustAllHosts(true);
        properties.put("mail.smtp.ssl.enable", "true");
        properties.put("mail.smtp.ssl.socketFactory", sf);
        // 获取默认session对象
        Session session = Session.getDefaultInstance(properties, new Authenticator() {
            public PasswordAuthentication getPasswordAuthentication() { // qq邮箱服务器账户、第三方登录授权码
                return new PasswordAuthentication(from, pass); // 发件人邮件用户名、密码
            }
        });

        try {
            // 创建默认的 MimeMessage 对象
            MimeMessage message = new MimeMessage(session);

            // Set From: 头部头字段
            message.setFrom(new InternetAddress(from));

            // Set To: 头部头字段
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(receive));

            // Set Subject: 主题文字
            message.setSubject(subject);

            // 创建消息部分
            BodyPart messageBodyPart = new MimeBodyPart();

            // 消息
            messageBodyPart.setText(msg);

            // 创建多重消息
            Multipart multipart = new MimeMultipart();

            // 设置文本消息部分
            multipart.addBodyPart(messageBodyPart);

            // 附件部分
            messageBodyPart = new MimeBodyPart();
            // 设置要发送附件的文件路径
            DataSource source = new FileDataSource(filename);
            messageBodyPart.setDataHandler(new DataHandler(source));

            // messageBodyPart.setFileName(filename);
            // 处理附件名称中文（附带文件路径）乱码问题
            messageBodyPart.setFileName(MimeUtility.encodeText(filename));
            multipart.addBodyPart(messageBodyPart);

            // 发送完整消息
            message.setContent(multipart);

            // 发送消息
            Transport.send(message);
            // System.out.println("Sent message successfully....");
            return true;
        } catch (MessagingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return false;
    }

测试代码：

public static void main(String[] args) {
    String receive="[e-mail]";
    String subject ="邮件主题";
    String msg ="邮件内容";
    String filename ="E:\\a.excel";
    try {
        SendMailAcceUtils.sendMail(receive, subject, msg, filename);
    } catch (GeneralSecurityException e) {
        e.printStackTrace();
    }
}