java实现发送邮件功能

        <!--发送邮件-->
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.4.7</version>
        </dependency>

 
import org.apache.tomcat.util.descriptor.web.WebXml;
 
import java.util.Date;
import java.util.Properties;
import javax.mail.Message.RecipientType;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
 
public class MailUtils {
    //服务器的地址
    public static final String SMTPSERVER = "xxx";
    //服务器的端口
    public static final String SMTPPORT = "xxx";
    //服务器的账号
    public static final String ACCOUT = "xxxxx";
    //服务器的密码
    public static final String PWD = "xxxxxx";
    //发件人的账号
    public static final String emailform = "xxxxx";
 
    public static void main(String[] args) throws Exception {
        String emailto = "xxxxxxxxxx";
        String subject = "（出差人英文名）取消出差通知";
        String content= "<出差人英文名>原计划（时间含yyyy/mm/dd hh:mm）xx到xx，从(地点)xx到xx进行出差。先提出取消，请知晓！\n" +
                "【取消原因】\n" +
                "Xxxxx\n" +
                "【原出差目的】\n" +
                "Xxxxx\n";
        MailUtils.sendEmail( emailto, subject, content);
    }
 
    public static void sendEmail(String emailto,String subject,String content)  {
        try {
            // 创建邮件配置
            Properties props = new Properties();
            props.setProperty("mail.transport.protocol", "smtp"); // 使用的协议（JavaMail规范要求）
            props.setProperty("mail.smtp.host", SMTPSERVER); // 发件人的邮箱的 SMTP 服务器地址
            props.setProperty("mail.smtp.port", SMTPPORT);
            props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
//        props.setProperty("mail.smtp.auth", "true"); // 需要请求认证
//        props.setProperty("mail.smtp.ssl.enable", "true");// 开启ssl
 
 
            // 根据邮件配置创建会话，注意session别导错包
            Session session = Session.getDefaultInstance(props);
            // 开启debug模式，可以看到更多详细的输入日志
            session.setDebug(true);
            //创建邮件
            MimeMessage message = createEmail(session, emailto, subject, content);
            //获取传输通道
            Transport transport = session.getTransport();
            transport.connect(SMTPSERVER,ACCOUT, PWD);
            //连接，并发送邮件
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();
        }catch (Exception e){
            e.printStackTrace();
        }
 
 
 
    }
 
 
    private static MimeMessage createEmail(Session session, String emailto,String subject,String content) throws Exception {
        // 根据会话创建邮件
        MimeMessage msg = new MimeMessage(session);
        // address邮件地址, personal邮件昵称, charset编码方式
        InternetAddress fromAddress = new InternetAddress(emailform,
                "", "utf-8");
        // 设置发送邮件方
        msg.setFrom(fromAddress);
 
        InternetAddress receiveAddress = new InternetAddress(
                emailto, "", "utf-8");
        // 设置邮件接收方
        msg.setRecipient(RecipientType.TO, receiveAddress);
        // 设置邮件标题
        msg.setSubject(subject, "utf-8");
        msg.setText(content);
        // 设置显示的发件时间
        msg.setSentDate(new Date());
        // 保存设置
        msg.saveChanges();
        return msg;
    }
}