知识大全 使用JavaMail 实现邮件发送

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　　import java io *; import java util *; import javax mail *; import javax mail internet *; import javax activation *;

　　public class SendMail  private String from; private String to; private String username; private String password; private String subject; private String text; private File file;  public SendMail()     public SendMail(String from String to String username String password)  this from=from;  this to=to;  this username=username;  this password=password;  public String getFrom()   return from;  public void setFrom(String from)   this from = from;  public String getTo()   return to;  public void setTo(String to)   this to = to;  public String getUsername()   return username;  public void setUsername(String username)   this username = username;  public String getPassword()   return password;  public void setPassword(String password)   this password = password;  public String getSubject()   return subject;  public void setSubject(String subject)   this subject = subject;  public String getText()   return text;  public void setText(String text)   this text = text;  public File getFile()   return file;  public void setFile(File file)   this file = file;    public boolean send()  Properties props=new Properties();  props put( mail smtp host );  //props put( mail smtp host localhost );  props put( mail smtp auth true);    Session mailSession=Session getDefaultInstance(props null);    try   Transport trans=mailSession getTransport( smtp );   nnect( username password);  // nnect();   Message newMessage=new MimeMessage(mailSession);         newMessage setSubject(subject);   newMessage setFrom(new InternetAddress(from));      /*    * 上传一个文件    * */   BodyPart fileBodyPart=new MimeBodyPart();   FileDataSource fds=new FileDataSource(file);   fileBodyPart setDataHandler(new DataHandler(fds));   fileBodyPart setFileName( a wav );      Address addressTo[] = new InternetAddress( );   newMessage setRecipients(Message RecipientType TO addressTo);   newMessage setText(text);      /*    * 将文件保存到Message中    * */   MimeMultipart multi = new MimeMultipart();    multi addBodyPart(fileBodyPart);   newMessage setContent(multi);

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