mailsender.java

java下实现邮件收发

package mail;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import javax.mail.PasswordAuthentication;


public class MailSender {
    //默认构造函数
    public MailSender() {
        setUsername("scutsyb");
        setSMTPhostName("smtp.163.com");
        setMailTo("[e-mail]");
        setSubject("Procar System.");
        setContent("Thank you for support.");
    }
//只定义发送对象，其他使用默认值
    public MailSender(String mailto) {
        setUsername("scutsyb");
        setPassword("20052005");
        setSMTPhostName("smtp.163.com");
        setMailTo(mailto);
		setSubject("Procar System.");
		setContent("Thank you for support.");
    }
//定义所有参数的构造函数（用于认证发送）
    public MailSender(String user,String pwd,String smtp,String mailto,String sub,String cont) {
        setUsername(user);
        setPassword(pwd);
        setSMTPhostName(smtp);
        setMailTo(mailto);
        setSubject(sub);
        setContent(cont);
    }
//	定义必要参数的构造函数（用于认证发送）
	public MailSender(String mailto, String sub, String cont) {
		setUsername("scutsyb");
		setPassword("20052005");
		setSMTPhostName("smtp.163.com");
		setMailTo(mailto);
		setSubject(sub);
		setContent(cont);
	  }
//定义必要参数（用于非认证发送）
    public MailSender( String user,String smtp,String mailto,String sub,String cont) {
        setUsername(user);
        setSMTPhostName(smtp);
        setMailTo(mailto);
        setSubject(sub);
        setContent(cont);
    }

    private String username;//用户账号
    private String password;//用户密码
    private String SMTPhostName;//SMTP服务器
    private String MailTo;//发送目标邮箱
    private String Subject;//邮件主题
    private String Content;//邮件内容

    public void setUsername(String username)
    {
        this.username = username;
    }

    public void setPassword(String password)
    {
        this.password = password;
    }

    public void setSMTPhostName(String SMTPhostName)
    {
        this.SMTPhostName = SMTPhostName;
    }

    public void setMailTo(String MailTo)
    {
        this.MailTo = MailTo;
    }

    public void setSubject(String Subject)
    {
        this.Subject = Subject;
    }

    public void setContent(String Content)
    {
        this.Content = Content;
    }

//发送需要认证的邮件
    public void SendAuthMail()
    {
        try{
              Properties props = new Properties();
              Session sendMailSession;

              Transport transport;
              Authenticator authenticator = new EmailAuthenticator(username,password);

              props.put("mail.smtp.host", SMTPhostName);
              props.put("mail.smtp.user",username);
              props.put("mail.smtp.password",password);
              props.put("mail.smtp.auth","true");
              sendMailSession = Session.getInstance(props, authenticator);
              Message newMessage = new MimeMessage(sendMailSession);
              newMessage.setFrom(new InternetAddress(username+"@163.com"));
              newMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(MailTo));
              newMessage.setSubject(Subject);
              newMessage.setSentDate(new Date());
              newMessage.setText(Content);
              transport = sendMailSession.getTransport("smtp");
              Transport.send(newMessage);
              
          }
         catch(MessagingException m)
         {
             System.out.println(m.toString());
         }

    }
//发送不认证的邮件
    public void SendNoAuthMail()
    {
        try{
              Properties props = new Properties();
              Session sendMailSession;

              Transport transport;

              props.put("mail.smtp.host", SMTPhostName);
              sendMailSession = Session.getInstance(props, null);
              Message newMessage = new MimeMessage(sendMailSession);
              newMessage.setFrom(new InternetAddress(username));
              newMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(MailTo));
              newMessage.setSubject(Subject);
              newMessage.setSentDate(new Date());
              newMessage.setText(Content);
              transport = sendMailSession.getTransport("smtp");
              Transport.send(newMessage);
          }
         catch(MessagingException m)
         {
             System.out.println(m.toString());
         }

    }

}

//认证类
class EmailAuthenticator extends javax.mail.Authenticator{
    public EmailAuthenticator(String username,String password) {
    setUsername(username);
    setPassword(password);
  }
  private String username;
  private String password;
  public void setUsername(String username)
  {
    this.username = username;
  }
  public void setPassword(String password)
  {
    this.password = password;
  }
  public PasswordAuthentication getPasswordAuthentication()
  {
    return new PasswordAuthentication(username,password);
  }

}