public static void sendMail(String from,String to,String host,String text,String subject){
       try{ 
           Properties props = new Properties(); 
           Session sendMailSession; 
           Store store; 
           Transport transport; 
           sendMailSession = Session.getInstance(props, null); 
           props.put("mail.smtp.host", "邮件服务器"); 
           Message newMessage = new MimeMessage(sendMailSession); 
           newMessage.setFrom(new InternetAddress(from)); 
           newMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(to)); 
           newMessage.setSubject(subject); 
           newMessage.setSentDate(new Date()); 
           newMessage.setText(text); 
           transport = sendMailSession.getTransport("smtp"); 
           transport.send(newMessage);                         
          }catch(MessagingException m){ 
           System.out.println(m.toString()); 
       } 
   }
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