邮件发送工具类

import java.util.Properties;

import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;

public class MailUtil {
    private static String smtp_host = "smtp.yeah.net";
    private static String username = "***@yeah.net";
    private static String password = "****";
    private static String from = "****";

    public static void main(String[] args) {
        MailUtil.sendMail("测试邮件", "测试邮件内用", "***@qq.com");
    }
    
    public static void sendMail(String subject, String content, String to) {
        Properties prop = new Properties();
        prop.setProperty("mail.smtp.host", smtp_host);
        prop.put("mail.transport.protocol", "smtp");
        prop.setProperty("mail.smtp.auth", "true");
        Session session = Session.getInstance(prop);
        Message mes = new MimeMessage(session);
        try {
            // 设置从哪发
            mes.setFrom(new InternetAddress(from));
            // 设置接收者
            mes.setRecipient(RecipientType.TO, new InternetAddress(to));
            // 邮件主题
            mes.setSubject(subject);
            // 邮件内容
            mes.setContent(content, "text/html;charset=utf-8");
            // 发送对象
            Transport transport = session.getTransport();
            // 对象邮件协议，用户名，授权码，
            transport.connect(smtp_host, username, password);
            // 获取所有邮件发送者，发送邮件
            transport.sendMessage(mes, mes.getAllRecipients());
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException("邮件发送失败");
        }
    }
}