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javaMail java·¢ËÍemail

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package mail;
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
import sun.misc.BASE64Encoder;
public class Mail {
 // ¶¨Òå·¢¼þÈËÏÔʾÃû³Æ¡¢·¢¼þÈË¡¢ÊÕ¼þÈË¡¢³­ËÍ¡¢SMTP·þÎñÆ÷¡¢Óû§Ãû¡¢ÃÜÂë¡¢Ö÷Ìâ¡¢ÄÚÈݵÈ
 private String displayName;
 private String from;
 
 private String to;
 
 private String copyTo;
 
 private String smtpServer;
 private String username;
 private String password;
 private String subject;
 private String content;
 private boolean ifAuth; // ·þÎñÆ÷ÊÇ·ñÒªÉí·ÝÈÏÖ¤
 private String filename = "";
 private Vector file = new Vector(); // ÓÃÓÚ±£´æ·¢Ë͸½¼þµÄÎļþÃûµÄ¼¯ºÏ
 /**
  * ÉèÖÃSMTP·þÎñÆ÷µØÖ·
  */
 public void setSmtpServer(String smtpServer) {
  this.smtpServer = smtpServer;
 }
 /**
  * ÉèÖ÷¢¼þÈ˵ĵØÖ·
  */
 public void setfrom(String from) {
  this.from = from;
 }
 /**
  * ÉèÖÃÏÔʾµÄÃû³Æ
  */
 public void setDisplayName(String displayName) {
  this.displayName = displayName;
 }
 /**
  * ÉèÖ÷þÎñÆ÷ÊÇ·ñÐèÒªÉí·ÝÈÏÖ¤
  */
 public void setIfAuth(boolean ifAuth) {
  this.ifAuth = ifAuth;
 }
 /**
  * ÉèÖÃE-mailÓû§Ãû
  */
 public void setUserName(String username) {
  this.username = username;
 }
 /**
  * ÉèÖÃE-mailÃÜÂë
  */
 public void setPassword(String password) {
  this.password = password;
 }
 /**
  * ÉèÖýÓÊÕÕß  [;¸ô¿ª]
  */
 public void setTo(String to) {
  this.to = to;
 }
 /**
  * ÉèÖÃÖ÷Ìâ
  */
 public void setSubject(String subject) {
  this.subject = subject;
 }
 /**
  * ÉèÖÃÖ÷ÌåÄÚÈÝ
  */
 public void setContent(String content) {
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