在java eclipse中發送郵件不起作用

Question

我想在發送電子郵件中創建一個函數（在eclipse中用java密碼重置類）。這是在學校電腦上。我不確定這是否是計算機或代碼的問題。這可能是電腦，因爲學校對它有很多限制。但是代碼在使用587時也使用端口25，如輸出中所示。我的代碼如下。

package Jframet; 

import java.io.*; 
import java.security.NoSuchAlgorithmException; 
import java.security.spec.InvalidKeySpecException; 
import java.util.Properties; 
import java.util.Random; 

import javax.mail.*; 
import javax.mail.internet.*; 
import javax.activation.*; 

public class serial implements java.io.Serializable 
{ 
    /** 
    * 
    */ 
    private static final long serialVersionUID = 1L; 
    private String uc; 
    private String pc; 
    private String ec; 

public serial() 
{ 
    uc = ""; 
    pc = ""; 
    ec = ""; 
} 
public serial(String u, String p, String e) 
{ 
    uc = u; 
    pc = p; 
    ec = e;  
} 



public boolean serialize(String s,serial e) 
{ 
    boolean b = true; 
    try { 
     File f = new File(s+this.uc+".ser"); 
     String pathname = f.getPath(); 
     FileOutputStream fileOut = new FileOutputStream(pathname); 
     ObjectOutputStream out = new ObjectOutputStream(fileOut); 
     out.writeObject(e); 
     out.close(); 
     fileOut.close(); 
     }catch(IOException i) { 
      i.printStackTrace(); 
     b = false; 
     } 
    return b; 
} 

public boolean deserial(String u,String p) 
{ 
    boolean b = true; 
    serial e; 
    File test = new File("H:/classes/" + u + ".ser"); 
    if(!test.exists()) 
    { 
     b = false; 
     return b; 
    } 
    else 
    { 
     try { 
      FileInputStream fileIn = new FileInputStream(test); 
      ObjectInputStream in = new ObjectInputStream(fileIn); 
      e = (serial) in.readObject(); 
      in.close(); 
      fileIn.close(); 

     } catch (IOException i) { 
      e = null; 
      i.printStackTrace(); 
      b = false; 

     } catch (ClassNotFoundException c) { 
      e = null; 
      c.printStackTrace(); 
      b = false; 

     } 
     String s1 = u; 
     String s2 = e.uc; 
     if(s1.compareTo(s2) == 0) 
     { 
      try{ 
       if(!PasswordAuthentication.validatePassword(p,e.pc)) 
       { 
        b = false; 
       } 
       else{} 
       }catch(NoSuchAlgorithmException i){ i.printStackTrace(); 
       b = false;} 
       catch(InvalidKeySpecException i){ i.printStackTrace(); 
       b = false;} 

     } 
     else 
     { 
      b = false; 
     } 
    } 

    return b; 
} 
public int emailtest(String u,String em) 
{ 
    Random r = new Random(); 
    int b = r.nextInt(999999); 
    serial e; 
    File test = new File("H:/classes/" + u + ".ser"); 
    if(!test.exists()) 
    { 
     b = 0; 
     return b; 
    } 
    else 
    { 
     try { 
      FileInputStream fileIn = new FileInputStream(test); 
      ObjectInputStream in = new ObjectInputStream(fileIn); 
      e = (serial) in.readObject(); 
      in.close(); 
      fileIn.close(); 

     } catch (IOException i) { 
      e = null; 
      i.printStackTrace(); 
      b = 0; 

     } catch (ClassNotFoundException c) { 
      e = null; 
      c.printStackTrace(); 
      b = 0; 

     } 
     if(u.compareTo(e.uc) == 0 && em.compareTo(e.ec) == 0) 
     { 
       String to = em; 
       String from = "168464@mcpsmd.net"; 
       String host = "smtp.mail.com"; 
       String port = "587"; 
       Properties properties = System.getProperties(); 
       properties.setProperty("mail.smtp.host", host); 
       properties.put("mail.smtp.socketFactory.port", port); 
       properties.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); 
       properties.put("mail.smtp.socketFactory.fallback", "false"); 
       Session session = Session.getInstance(properties, null); 

       try { 
       MimeMessage message = new MimeMessage(session); 
       // Set From: header field of the header. 
       message.setFrom(new InternetAddress(from)); 
       // Set To: header field of the header. 
       message.addRecipient(Message.RecipientType.TO, new InternetAddress(to)); 
       // Set Subject: header field 
       message.setSubject("Password Reset"); 
       // Now set the actual message 
       message.setText(Integer.toString(b)); 
       // Send message 
       Transport.send(message); 
       System.out.println("Sent message successfully...."); 
       }catch (MessagingException mex) { 
       mex.printStackTrace(); 
       } 
     } 
     else 
     { 
      if(u.compareTo(e.uc) != 0) 
      { 
       b = -1; 
      } 
      else 
      { 
       b = 0; 
      } 
     } 
    } 

    return b; 
} 


} 

和我的輸出是

javax.mail.MessagingException: Could not connect to SMTP host: smtp.mail.com, port: 25; 
    nested exception is: 
    java.net.SocketException: Permission denied: connect 
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1972) 
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:642) 
    at javax.mail.Service.connect(Service.java:295) 
    at javax.mail.Service.connect(Service.java:176) 
    at javax.mail.Service.connect(Service.java:125) 
    at javax.mail.Transport.send0(Transport.java:194) 
    at javax.mail.Transport.send(Transport.java:124) 
    at Jframet.serial.emailtest(serial.java:165) 
    at Jframet.loginpage$6.mouseClicked(loginpage.java:345) 
    at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source) 
    at java.awt.Component.processMouseEvent(Unknown Source) 
    at javax.swing.JComponent.processMouseEvent(Unknown Source) 
    at java.awt.Component.processEvent(Unknown Source) 
    at java.awt.Container.processEvent(Unknown Source) 
    at java.awt.Component.dispatchEventImpl(Unknown Source) 
    at java.awt.Container.dispatchEventImpl(Unknown Source) 
    at java.awt.Component.dispatchEvent(Unknown Source) 
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) 
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) 
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) 
    at java.awt.Container.dispatchEventImpl(Unknown Source) 
    at java.awt.Window.dispatchEventImpl(Unknown Source) 
    at java.awt.Component.dispatchEvent(Unknown Source) 
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source) 
    at java.awt.EventQueue.access$500(Unknown Source) 
    at java.awt.EventQueue$3.run(Unknown Source) 
    at java.awt.EventQueue$3.run(Unknown Source) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) 
    at java.awt.EventQueue$4.run(Unknown Source) 
    at java.awt.EventQueue$4.run(Unknown Source) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) 
    at java.awt.EventQueue.dispatchEvent(Unknown Source) 
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) 
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) 
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) 
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) 
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) 
    at java.awt.EventDispatchThread.run(Unknown Source) 
Caused by: java.net.SocketException: Permission denied: connect 
    at java.net.DualStackPlainSocketImpl.connect0(Native Method) 
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) 
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) 
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) 
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source) 
    at java.net.PlainSocketImpl.connect(Unknown Source) 
    at java.net.SocksSocketImpl.connect(Unknown Source) 
    at java.net.Socket.connect(Unknown Source) 
    at sun.security.ssl.SSLSocketImpl.connect(Unknown Source) 
    at sun.security.ssl.BaseSSLSocketImpl.connect(Unknown Source) 
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:319) 
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:207) 
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1938) 
    ... 40 more 

Answer 1

您需要添加PasswordAuthentication這樣的：修訂

String to = em; 
    String from = "168464@mcpsmd.net"; 
    String host = "smtp.mail.com"; 
    String port = "587"; 
    String password = //Your email password 
    Properties properties = System.getProperties(); 
    properties.put("mail.smtp.auth", "true"); 
    properties.put("mail.smtp.starttls.enable", "true"); 
    properties.put("mail.smtp.port", "587"); 

    if (from.contains("hotmail")) { 
     properties.put("mail.smtp.host", "smtp.live.com"); 

    } else if (from.contains("gmail")) { 
     properties.put("mail.smtp.host", "smtp.gmail.com"); 

    } else if (from.contains("yahoo")) { 
     properties.put("mail.smtp.host", "smtp.mail.yahoo.com"); 

    } else { 
     System.out.println("Please use 'Yahoo, Gmail or Hotmail") 
    } 

    Session messageSession = Session.getDefaultInstance(properties, new Authenticator() { 
     @Override 
     protected PasswordAuthentication getPasswordAuthentication() { 

      return new PasswordAuthentication(from, password); 
     } 
    }); 

    try { 
     MimeMessage mimeMessage = new MimeMessage(messageSession); 
     mimeMessage.setFrom(new InternetAddress(from)); 
     mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(to)); 
     mimeMessage.setSubject(subject); 
     mimeMessage.setText(message); 

     Transport.send(mimeMessage); 

    } catch (MessagingException e) { 
     System.out.println(e.getMessage()); 
    }