package com.hi.test;import java.util.Properties;import javax.activation.DataHandler;import javax.activation.FileDataSource;import javax.mail.Address;import javax.mail.BodyPart;import javax.mail.Message;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;public class InitMail {    private String smtp;// SMTP地址    private String from;// 发件人    private String to;// 收件人    private String copyto;// 抄送    private String subject;// 主题    private String content;// 内容    private String username;// 用户名    private String password;// 密码    private String filename;// 附件地址，如: S:\download\xxx.txt    // =====================//    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 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    // ======================//    @SuppressWarnings("unused")    private InitMail() {    }    /*     * 抄送和附件可以为空，其他不能为空     */    public InitMail(String smtp, String from, String to, String copyto,            String subject, String content, String username, String password,            String filename) {        this.smtp = smtp;        this.from = from;        this.to = to;        this.copyto = copyto;        this.subject = subject;        this.content = content;        this.username = username;        this.password = password;        this.filename = filename;    }    public boolean sendMail() {        boolean result = false;        try {            props = System.getProperties(); // 获得系统属性对象            session = Session.getDefaultInstance(props); // 获得邮件会话对象                mimeMsg = new MimeMessage(session); // 创建MIME邮件对象                        mp = new MimeMultipart();                                    mimeMsg.setFrom(new InternetAddress(from)); // 设置发信人                                    mimeMsg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(to));//设置收件人                        mimeMsg.setSubject(""+subject);//设置主题                        //如果抄送人不为空或null，则设置抄送人            if(!(null==copyto||"".equals(copyto))){                mimeMsg.setRecipients(Message.RecipientType.CC,(Address[]) InternetAddress.parse(copyto));            }                        BodyPart bp = new MimeBodyPart();            bp.setContent("" + content, "text/html;charset=GBK");            mp.addBodyPart(bp);                                    //如果附件不为空或null，则设置附件            if(!(null==filename||"".equals(filename))){                BodyPart bp2 = new MimeBodyPart();                FileDataSource fileds = new FileDataSource(filename);                bp2.setDataHandler(new DataHandler(fileds));                bp2.setFileName(fileds.getName());                mp.addBodyPart(bp2);            }                                    mimeMsg.setContent(mp);            mimeMsg.saveChanges();                                    Transport transport = session.getTransport("smtp");            transport.connect(smtp, username,password);            transport.sendMessage(mimeMsg,mimeMsg.getRecipients(Message.RecipientType.TO));                        //如果抄送人不为空或null,则发送给抄送人            if(!(null==copyto||"".equals(copyto))){            transport.sendMessage(mimeMsg,mimeMsg.getRecipients(Message.RecipientType.CC));            }                        transport.close();            result=true;                    System.out.println("发送成功");        } catch (Exception e) {            System.out.println("出错，邮件发送失败");            e.printStackTrace();                    }        return result;    }        }

package com.hi.test;public class SendMail {    public static void main(String[] args) {        // TODO Auto-generated method stub        String smtp = "smtp.qq.com";          String from = "xxx@qq.com";          String to = "xxx@hotmail.com";           String subject = "test";          String content = "this is java mail test ";          String username="xxx";          String password="xxx";          String filename="S:\\download\\javax.mail.jar";                     InitMail mail=new InitMail(smtp, from, to, null,                subject,content, username, password,                filename);        mail.sendMail();    }}