Java邮件发送实例

又一个新的项目启动了，虽说目前还处于系统设计阶段，但从当前的系统需求来看，其中有一项功能就是通过Web方式发送系统邮件。还是提前做好准备吧，还说不错，花了一下午的时间，把封装了一个MailService类，直接调用即可。此篇仅介绍用javamail实现发送邮件功能，其中涉及smtp认证，邮件附件发送，及HTML内容邮件等。

系统环境：Windows XP SP3

开发环境：Eclipse 3.5/JDK 1.6/Struts2/Tiles

测试工具：Firefox 3.6/IE 8

测试邮箱：网易邮箱、IBM Lotus Notes邮箱

所需JAR包：mail.jar（包含MailService.java类文件）　　下载地址一　　下载地址二

MailService.java类文件（经过封装的发送邮件类）：

package com.olympus.Util;

import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
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;

public class MailService extends Authenticator {
    private String m_username = null;
    private String m_userpass = null;

    public void setUsername(String username) {
        m_username = username;
    }

    public void setUserpass(String userpass) {
        m_userpass = userpass;
    }

    public MailService(String username, String userpass) {
        super();
        setUsername(username);
        setUserpass(userpass);
    }

    public PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(m_username,m_userpass);
    }

    public static void sendmail(
            String subject, String from,
            String[] to, String text,
            String[] filenames,String mimeType) throws Exception
    {
        Properties props = new Properties();
        String smtp = "smtp.163.com";               //设置发送邮件所用到的SMTP服务器地址
        String smtpname = "username";               //设置登录SMTP服务器的用户名
        String smtppassword = "password";           //设置登录SMTP服务器的密码

        Session mailSession;                        //邮件会话对象
        MimeMessage mimeMsg;                        //MIME邮件对象
        props = java.lang.System.getProperties();   //获得系统属性对象

        props.put("mail.smtp.host", smtp);          //设置SMTP主机
        props.put("mail.smtp.auth", "true"); //链接到SMTP服务器是否需要用户名和密码验证

        //到服务器验证发送的用户名和密码是否正确
        MailService myEmailAuther = new MailService(smtpname, smtppassword);
        //设置邮件会话
        mailSession = Session.getInstance(props, (Authenticator) myEmailAuther);
        Transport transport = mailSession.getTransport("smtp");     //设置传输协议
        mimeMsg = new MimeMessage(mailSession);                     //设置from、to等信息

        InternetAddress sentFrom = new InternetAddress(from);
        mimeMsg.setFrom(sentFrom); //设置发送人地址
        InternetAddress[] sendTo = new InternetAddress[to.length];

        for (int i = 0; i < to.length; i++) {
            //System.out.println("发送到:" + to[i]);
            sendTo[i] = new InternetAddress(to[i]);
        }

        mimeMsg.setRecipients(MimeMessage.RecipientType.TO, sendTo);
        mimeMsg.setSubject(subject, "utf-8");
        MimeBodyPart messageBodyPart1 = new MimeBodyPart();
        //messageBodyPart.setText(UnicodeToChinese(text));
        messageBodyPart1.setContent(text, mimeType);
        Multipart multipart = new MimeMultipart();//附件传输格式
        multipart.addBodyPart(messageBodyPart1);

        for (int i = 0; i < filenames.length; i++) {
            MimeBodyPart messageBodyPart2 = new MimeBodyPart();
            String filename = filenames[i].split(",")[0];           //选择出每一个附件名
            String displayname = filenames[i].split(",")[1];
            FileDataSource fds = new FileDataSource(filename);      //得到数据源
            //得到附件本身并至入BodyPart
            messageBodyPart2.setDataHandler(new DataHandler(fds));
            //得到文件名同样至入BodyPart
            //messageBodyPart2.setFileName(displayname);
            //messageBodyPart2.setFileName(fds.getName());
            messageBodyPart2.setFileName(MimeUtility.encodeText(displayname));
            multipart.addBodyPart(messageBodyPart2);
        }

        mimeMsg.setContent(multipart);
        mimeMsg.setSentDate(new Date());    //设置信件头的发送日期
        mimeMsg.saveChanges();
        Transport.send(mimeMsg);            //发送邮件
        transport.close();
    }
}

在Action中调用

@Action(value="//",
    results={@Result(name="success", location="index",type="tiles")})
public String Index(){
    String sendTo[] = {"[email protected]"};
    String fileNames[] = {};
    try {
        MailService.sendmail(
                "JavaWeb发送邮件测试", "Alex Xu<[email protected]>",
                sendTo, "JavaWeb发送邮件测试",
                fileNames, "text/html;charset=utf-8");
    } catch (Exception e) {
        e.printStackTrace();
    }

    return SUCCESS;
}
测试结果
 我的网易邮箱显示邮件发送成功： 
      
     ② 我的工作邮箱（IBM Lotus Notes）成功接收到来自网易邮箱发出的邮件：
 ：