Java发送邮件验证码

package org.jeecg.modules.system.util;

import com.sun.mail.util.MailSSLSocketFactory;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

public class MailUtils {

    public static void toMail(String email,String code) {
        String from = "";// 发件人电子邮箱
        String host = "smtp.163.com"; // 指定发送邮件的主机smtp.qq.com(QQ)|smtp.163.com(网易)

        Properties properties = System.getProperties();// 获取系统属性

        properties.setProperty("mail.smtp.host", host);// 设置邮件服务器
        properties.setProperty("mail.smtp.auth", "true");// 打开认证

        try {
            //QQ邮箱需要下面这段代码，163邮箱不需要
            MailSSLSocketFactory sf = new MailSSLSocketFactory();
            sf.setTrustAllHosts(true);
            properties.put("mail.smtp.ssl.enable", "true");
            properties.put("mail.smtp.ssl.socketFactory", sf);


            // 1.获取默认session对象
            Session session = Session.getDefaultInstance(properties, new Authenticator() {
                public PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication("", ""); // 发件人邮箱账号、授权码
                }
            });

            // 2.创建邮件对象
            Message message = new MimeMessage(session);
            // 2.1设置发件人
            message.setFrom(new InternetAddress(from));
            // 2.2设置接收人
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(email));
            // 2.3设置邮件主题
            message.setSubject("修改密码");
            // 2.4设置邮件内容
            String content = "\n" +
                    "    \n" +
                    "    \n" +
                    "    \n" +
                    "    \n" +
                    "    \n" +
                    "\n" +
                    "\n" +
                    "\n"+"    \n"+"    \n"+"        \n"+"    \n"+"    \n"+"
 
                    
 
                    
 
                    
\n" +
                    "            
\n" +
                    "                \n"+"                    \n"+"                \n" +
                    "            
\n" +
                    "            
\n" +
                    "                
\n" +
                    "                    尊敬的用户：您好！\n" +
                    "                    \n" +
                    "                       您的验证码是："+code+"，以完成操作。\n" +
                    "                    \n" +
                    "                
\n" +
                    "                
\n" +
                    "                    \n" +
                    "                        
\n" +
                    "                            注意：此操作可能会修改您的密码。如非本人操作，请及时登录并修改密码以保证帐户安全\n" +
                    "                            
（工作人员不会向你索取此验证码，请勿泄漏！)\n" +
                    "                        
\n" +
                    "                    \n" +
                    "                
\n" +
                    "            
\n" +
                    "            
\n" +
                    "                
\n" +
                    "                    
此为系统邮件，请勿回复
\n" +
                    "                        请保管好您的邮箱，避免账号被他人盗用\n" +
                    "                    
\n" +
                    "                    
公司名称
\n" +
                    "                
\n" +
                    "            
\n" +
                    "        
 
                    
 
                    
 
                    
\n" +
                    "";
            message.setContent(content, "text/html;charset=UTF-8");
            // 3.发送邮件
            Transport.send(message);
            System.out.println("邮件成功发送!");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

//调用
 MailUtils.toMail(email, code);