Java发送文本邮件及带附件邮件

1. 邮件发送工具类

import org.springframework.core.io.support.PropertiesLoaderUtils;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Properties;
import java.util.Set;

public class MailUtil {
   
   private static Properties properties = null;
   static{
      properties = new Properties();
        try {
           //properties文件要放到src目录下
            properties = PropertiesLoaderUtils.loadAllProperties("mailConfig.properties");
            //遍历取值
            Set<Object> objects = properties.keySet();
            for (Object object : objects) {
                System.out.println(properties.getProperty((String) object));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
   }

   /**
    * 普通文本邮件发送
    * 
    * @param to
    *            邮件发送对象
    * @param content
    *            邮件发送内容
    * @param subject
    *            邮件主题
    * @throws MessagingException
    * @throws AddressException
    */
   public static void sendMail(String to, String content, String subject) throws AddressException, MessagingException {
      // 1.创建连接对象，连接到邮箱服务器,以qq邮箱服务器为例，需要先开通qq的SMTP协议
      Properties props = new Properties();
      //邮件发送协议
      props.put("mail.transport.protocol", properties.get("mail.transport.protocol"));
      //邮件发送服务器
      props.put("mail.smtp.host", properties.get("mail.smtp.host"));
      //设置授权用户名和密码校验
      props.put("mail.smtp.auth",  properties.get("mail.smtp.auth"));
      //邮件发送端口
      props.put("mail.smtp.port",  Integer.valueOf((String)properties.get("mail.smtp.port")));
      //启用ssl加密方式发送
      props.put("mail.smtp.ssl.enable", properties.get("mail.smtp.ssl.enable"));
      Session session = Session.getInstance(props, new Authenticator() {
         protected PasswordAuthentication getPasswordAuthentication() {// 认证信息
            return new PasswordAuthentication((String) properties.get("serverMailAddress"), (String) properties.get("serverMailPwd"));
         }
      });

      // 2.创建邮件对象
      Message message = new MimeMessage(session);
      // 发送人
      message.setFrom(new InternetAddress((String) properties.get("serverMailAddress")));
      // 接收人
      message.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
      // 邮件主题
      message.setSubject(subject);
      // 邮件内容
      Multipart multipart = new MimeMultipart("alternative");
      MimeBodyPart htmlPart = new MimeBodyPart();
      htmlPart.setContent( content, "text/html; charset=utf-8" );
      htmlPart.setHeader("Content-Type", "text/html");

      multipart.addBodyPart( htmlPart );
      message.setContent(multipart);
      //message.setText(content);
      // 3.发送邮件
      Transport.send(message);
   }

   //带附件发送邮件
   public static void sendMailWithAttach(String to, String content, String subject) throws AddressException, MessagingException {
      // 1.创建连接对象，连接到邮箱服务器,以qq邮箱服务器为例，需要先开通qq的SMTP协议
      Properties props = new Properties();
      //邮件发送协议
      props.put("mail.transport.protocol", properties.get("mail.transport.protocol"));
      //邮件发送服务器
      props.put("mail.smtp.host", properties.get("mail.smtp.host"));
      //设置授权用户名和密码校验
      props.put("mail.smtp.auth",  properties.get("mail.smtp.auth"));
      //邮件发送端口
      props.put("mail.smtp.port",  Integer.valueOf((String)properties.get("mail.smtp.port")));
      //启用ssl加密方式发送
      props.put("mail.smtp.ssl.enable", properties.get("mail.smtp.ssl.enable"));
      Session session = Session.getInstance(props, new Authenticator() {
         protected PasswordAuthentication getPasswordAuthentication() {// 认证信息
            return new PasswordAuthentication((String) properties.get("serverMailAddress"), (String) properties.get("serverMailPwd"));
         }
      });

      // 2.创建邮件对象
      Message message = new MimeMessage(session);
      // 发送人
      message.setFrom(new InternetAddress((String) properties.get("serverMailAddress")));
      // 接收人
      message.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
      // 邮件主题
      message.setSubject(subject);

      // 创建一个MIME子类型为"mixed"的MimeMultipart对象，表示这是一封混合组合类型的邮件
      MimeMultipart mailContent = new MimeMultipart("mixed");
      message.setContent(mailContent);

      // 邮件内容
      //Multipart multipart = new MimeMultipart("alternative");
      MimeBodyPart htmlPart = new MimeBodyPart();
      htmlPart.setContent( content, "text/html; charset=utf-8" );
      htmlPart.setHeader("Content-Type", "text/html");
      //multipart.addBodyPart( htmlPart );


      //邮件附件
      MimeBodyPart attach = new MimeBodyPart();
      mailContent.addBodyPart(attach);
      mailContent.addBodyPart(htmlPart);

      String fileName = "E:\报表原sql\ll.sql";
      FileDataSource source = new FileDataSource(fileName);
      attach.setDataHandler(new DataHandler(source));
      try {
         attach.setFileName(MimeUtility.encodeText("SPR006.sql"));
      } catch (UnsupportedEncodingException e) {
         e.printStackTrace();
      }


      //message.setContent(multipart);
      // 3.发送邮件
      Transport.send(message);
   }
   
   
   
   public static void main(String[] args) {
      String content = "我是用来测试邮件发送的。如果成功了就牛逼了，如果失败了说明真的很挫。";
      String to = "jeffyang@xxxx.com";//这里需要改成接收邮件的真实邮箱地址
        String subject = "邮件测试";
        try {
         //sendMail(to,content,subject);
         sendMailWithAttach(to,content,subject);
         System.out.println("邮件发送成功");
      } catch (MessagingException e) {
         e.printStackTrace();
         System.out.println("邮件发送失败");
      }
   }

2.存放于src目录下的邮件服务配置文件mailConfig.properties 这里以qq邮箱作为测试服务器

#邮件发送协议
mail.transport.protocol=smtp
#邮箱服务器
mail.smtp.host=smtp.qq.com
#mail.smtp.host=localhost
#是否设置授权用户名和密码校验
mail.smtp.auth=true
#邮件发送端口
mail.smtp.port=465
#mail.smtp.port=25
#是否启用ssl加密方式发送
mail.smtp.ssl.enable=true

#邮件发送人账号(这里需要改成自己的真实的qq账号)
serverMailAddress=XXXXX@qq.com
#密码
serverMailPwd=xxzcrpfgovdmbdee