java邮件程序在其他设备上运行时无法工作

Question

我已经检查了程序，代码在一个系统上运行，但当我将此文件迁移到另一个系统时，我得到以下错误，我想知道为什么会发生这种情况，以及如何解决此问题？我的证件是正确的

package javaapplication6;  

import java.util.Properties;    
import javax.mail.*;
import javax.mail.internet.*;    
class Mailer{  
    public static void send(String from,String password,String to,String sub,String msg){  
          //Get properties object    

          Properties props = new Properties();    
          props.put("mail.smtp.host", "smtp.gmail.com");    
          props.put("mail.smtp.socketFactory.port", "465"); 
          props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
          props.put("mail.smtp.auth", "true");    
          props.put("mail.smtp.port", "465");
          //get Session
          Session session = Session.getDefaultInstance(props,    
           new javax.mail.Authenticator() {    
           protected PasswordAuthentication getPasswordAuthentication() {    
           return new PasswordAuthentication("[e-mail]","XXXXXXXXX");  
           }    
          });    
          //compose message    
          try {    
           MimeMessage message = new MimeMessage(session);    
           message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));    
           message.setSubject(sub);    
           message.setText(msg);    
           //send message  
           Transport.send(message);    
           System.out.println("message sent successfully");    
          } catch (MessagingException e) {throw new RuntimeException(e);}    

    }  
}  
public class SendEmail{    
 public static void main(String[] args) {    
     //from,password,to,subject,message  
     Mailer.send("[e-mail]","XXXXXXXXX","[e-mail]","hello javatpoint","How r u?");  
     //change from, password and to  
 }    
}

我得到的例外是：

原因：javax.mail.MessagingException：无法连接到SMTP主机:SMTP.gmail.com，端口：465；嵌套的异常是：

javax.net.ssl.sslhandShakeException：sun.security.validator.validatoreXception：PKIX路径构建失败：sun.security.provider.certPath.SunCertPathBuilderException：找不到请求目标的有效证书路径

Answer 1

这是由于Avast防病毒软件阻塞了端口，所以我卸载了它，程序运行良好！！.