利用java编写发送邮件

最近项目需要添加一个发送邮件的功能，参考了网上了一个例子，代码如下：

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

import javax.mail.Authenticator;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;

import com.sun.mail.util.MailSSLSocketFactory;

public class SendMailThread extends Thread {
    private String mailAdr;
    private String content;
    private String subject;

    public SendMailThread(String mailAdr, String subject, String content) {
        // TODO Auto-generated constructor stub
        super();
        this.mailAdr = mailAdr;
        this.subject = subject;
        this.content = content;
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        super.run();
        try {
            sendMail(mailAdr, subject, content);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    private void sendMail(String mailAdr, String subject, String content) throws Exception {
        // TODO Auto-generated method stub
        MailSSLSocketFactory sf = new MailSSLSocketFactory();
        sf.setTrustAllHosts(true);

        final Properties props = new Properties();
        // 表示SMTP发送邮件，需要进行身份验证
        props.put("mail.transport.protocol", "smtp"); 
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.host", "smtp.qq.com");
         // 端口  
     /*   props.put("mail.smtp.port", 25);  */
        // smtp登陆的账号、密码 ；需开启smtp登陆
        props.setProperty("mail.debug", "true");
        props.put("mail.user", "发送者的QQ邮箱");
        props.put("mail.password", "QQ邮箱授权码");
        //特别需要注意，要将ssl协议设置为true,否则会报530错误
        props.put("mail.smtp.ssl.enable", "true");
        props.put("mail.smtp.ssl.socketFactory", sf);

        Authenticator authenticator = new Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                // 用户名、密码
                String userName = props.getProperty("mail.user");
                String password = props.getProperty("mail.password");
                return new PasswordAuthentication(userName, password);

            }
        };
        // 使用环境属性和授权信息，创建邮件会话
        Session mailSession = Session.getInstance(props, authenticator);
        // 创建邮件消息
        MimeMessage message = new MimeMessage(mailSession);
        // 设置发件人
        try {
            InternetAddress form = new InternetAddress(
                    props.getProperty("mail.user"));
            message.setFrom(form);

            // 设置收件人
            InternetAddress to = new InternetAddress(mailAdr);
            message.setRecipient(RecipientType.TO, to);

            // 设置抄送
            // InternetAddress cc = new InternetAddress("[email protected]");
            // message.setRecipient(RecipientType.CC, cc);

            // 设置密送，其他的收件人不能看到密送的邮件地址
            // InternetAddress bcc = new InternetAddress("[email protected]");
            // message.setRecipient(RecipientType.CC, bcc);

            // 设置邮件标题
            message.setSubject(subject);
            // 设置邮件的内容体
            message.setContent(content, "text/html;charset=UTF-8");
            // 发送邮件
            Transport.send(message);
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        SendMailThread d = new SendMailThread("接收者的邮箱", "测试邮件标题",
                "测试邮件001 
内容....");
        d.start();
        System.out.println("程序继续...");
    }

}

这里可以开启多个线程发送邮件，本例使用QQ邮箱测试，需要将QQ邮箱的设置里的账户SMTP服务打开。需要导入mail.jar包。