java 发送mail

import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Multipart;
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.Message;

public class SendMail {

    private MimeMessage mimeMsg; // MIME邮件对象

    private Session session; // 邮件会话对象

    private Properties props; // 系统属性

    private String username = ""; // smtp认证用户名和密码

    private String password = "";

    private Multipart mp; // Multipart对象,邮件内容,标题,附件等内容均添加到其中后再生成MimeMessage对象

    /**
     * 
     */
    public SendMail(String smtp) {
        setSmtpHost(smtp);
        createMimeMessage();
    }

    /**
     * 指定邮件服务器
     * 
     * @param hostName String 主机名
     */
    public void setSmtpHost(String hostName) {
        System.out.println("设置系统属性：mail.smtp.host = " + hostName);
        if (props == null)
            props = System.getProperties(); // 获得系统属性对象

        props.put("mail.smtp.host", hostName); // 设置SMTP主机
    }

    /**
     * @return boolean
     */
    public boolean createMimeMessage() {
        try {
            System.out.println("准备获取邮件会话对象！");
            session = Session.getDefaultInstance(props, null); // 获得邮件会话对象
        } catch (Exception e) {
            System.err.println("获取邮件会话对象时发生错误！" + e);
            return false;
        }

        System.out.println("准备创建MIME邮件对象！");
        try {
            mimeMsg = new MimeMessage(session); // 创建MIME邮件对象
            mp = new MimeMultipart();

            return true;
        } catch (Exception e) {
            System.err.println("创建MIME邮件对象失败！" + e);
            return false;
        }
    }

    /**
     * smtp是否需要认证
     * 
     * @param need boolean
     */
    public void setNeedAuth(boolean need) {
        System.out.println("设置smtp身份认证：mail.smtp.auth = " + need);
        if (props == null)
            props = System.getProperties();

        if (need) {
            props.put("mail.smtp.auth", "true");
        } else {
            props.put("mail.smtp.auth", "false");
        }
    }

    /**
     * @param name String
     * @param pass String
     */
    public void setNamePass(String name, String pass) {
        username = name;
        password = pass;
    }

    /**
     * @param mailSubject String
     * @return boolean
     */
    public boolean setSubject(String mailSubject) {
        System.out.println("设置邮件主题！");
        try {
            mimeMsg.setSubject(mailSubject);
            return true;
        } catch (Exception e) {
            System.err.println("设置邮件主题发生错误！");
            return false;
        }
    }

    /**
     * @param mailBody String
     */
    public boolean setBody(String mailBody) {
        try {
            BodyPart bp = new MimeBodyPart();
            bp.setContent(
                    "<meta http-equiv=Content-Type content=text/html; charset=gb2312>"
                            + mailBody, "text/html;charset=GB2312");
            mp.addBodyPart(bp);

            return true;
        } catch (Exception e) {
            System.err.println("设置邮件正文时发生错误！" + e);
            return false;
        }
    }

    /**
     * @param name String
     * @param pass String
     */
    public boolean addFileAffix(String filename) {

        System.out.println("增加邮件附件：" + filename);

        try {
            BodyPart bp = new MimeBodyPart();
            FileDataSource fileds = new FileDataSource(filename);
            bp.setDataHandler(new DataHandler(fileds));
            bp.setFileName(fileds.getName());

            mp.addBodyPart(bp);

            return true;
        } catch (Exception e) {
            System.err.println("增加邮件附件：" + filename + "发生错误！" + e);
            return false;
        }
    }

    /**
     * @param name String
     * @param pass String
     */
    public boolean setFrom(String from) {
        System.out.println("设置发信人！");
        try {
            mimeMsg.setFrom(new InternetAddress(from)); // 设置发信人
            return true;
        } catch (Exception e) {
            return false;
        }
    }

    /**
     * @param name String
     * @param pass String
     */
    public boolean setTo(String to) {
        if (to == null)
            return false;

        try {
            mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress
                    .parse(to));
            return true;
        } catch (Exception e) {
            return false;
        }

    }

    /**
     * @param name String
     * @param pass String
     */
    public boolean setCopyTo(String copyto) {
        if (copyto == null)
            return false;
        try {
            mimeMsg.setRecipients(Message.RecipientType.CC,
                    (Address[]) InternetAddress.parse(copyto));
            return true;
        } catch (Exception e) {
            return false;
        }
    }

    /**
     * @param name String
     * @param pass String
     */
    public boolean sendout() {
        try {
            mimeMsg.setContent(mp);
            mimeMsg.saveChanges();
            System.out.println("正在发送邮件....");

            Session mailSession = Session.getInstance(props, null);
            Transport transport = mailSession.getTransport("smtp");
            transport.connect((String) props.get("mail.smtp.host"), username,
                    password);
            transport.sendMessage(mimeMsg, mimeMsg
                    .getRecipients(Message.RecipientType.TO));
            // transport.send(mimeMsg);

            System.out.println("发送邮件成功！");
            transport.close();

            return true;
        } catch (Exception e) {
            System.err.println("邮件发送失败！" + e);
            return false;
        }
    }

    /**
     * Just do it as this
     */
    public static void main(String[] args) {
        try {

            String mailbody = "<meta http-equiv=Content-Type content=text/html; charset=gb2312>"
                    + "<div align=center><a href=test> mail </a></div>";

            SendMail themail = new SendMail("smtp.163.com");

            themail.setNeedAuth(true);

            themail.setCopyTo("aaa@163.com");

            if (themail.setSubject("标题") == false)
                return;

            if (themail.setBody(mailbody) == false)
                return;

            if (themail.setTo("aaa@163.com") == false)
                return;

            if (themail.setFrom("aaa@163.com") == false)
                return;

            if (themail.addFileAffix("c://boot.ini") == false)
                return;

            themail.setNamePass("aaa", "aaa!");

            if (themail.sendout() == false)
                return;

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}