emailsender.java

《jsp网站开发技术》中的源代码(清华大学出版社)

package com.javacat.jsp.beans;

import java.util.*; 
import javax.mail.*; 
import java.io.*; 
import javax.mail.internet.*; 
import javax.mail.event.*; 

/**
*a simple e-mail sender bean
*to send email contians only plain text.
*/
public class EmailSender{
	//fields
	private String from;
	private String to;
	private String subject;
	private String comment;
	private String filename;
	private String id;
	private String pwd; 
	String smtpHost="smtp.263.net";
	public EmailSender(){
		super();
	}
	/**
	*set the message from where
	*@param from from where
	*/
	public void setFrom(String from)
	{
		if(from!=null&&!from.equals("")){
			this.from=from;
			this.setId(from.substring(0,from.indexOf('@')));
		}
	}
	/**
	*set the message to whom
	*@param to who to receive this message
	*/
	public void setTo(String to)
	{
		if(to!=null&&!to.equals(""))
		this.to=to;
	}
	public String getTo()
	{
		return this.to;
	}
	
	/**
	*set the subject of the message
	*@param subject the message's subject
	*/
	public void setSubject(String subject)
	{
		this.subject=parseChinese(subject);
	}
	/**
	*get the subject of the special message
	@return the subject
	*/
	public String getSubject()
	{
		return this.subject;
	}
	/**
	*set the smtp host which to send your mail
	*@param host the host you want to connect 
	*/
	public void setSmtpHost(String host)
	{
		if(host!=null)
		this.smtpHost=host;
	}
	/**
	*set the message yout want to send
	*@param words the words you want to send
	*/
	public void setComment(String words)
	{
		this.comment=parseChinese(words);
	}
	/**
	*set attempt filename
	*@param filename the attempt file's name
	*/
	public void setFilename(String filename)
	{
		if(filename!=null&&!filename.equals(""))
		this.filename=filename;
	}
	/**
	*set your id of the smtp system
	*@param id the id to be set
	*/
	public void setId(String id)
	{
		if(id!=null&&!id.equals(""))
		this.id=id;
	}
	/**
	*get the id
	*@return the id who send this message
	*/
	public String getId()
	{
		return this.id;
	}
	
	/**
	*set your password of the specified id
	*@param password the password to be set
	*/
	public void setPassword(String password)
	{
		this.pwd=password;
	}
	
        public void sendmail() throws Exception
	{
		Session session;
		MimeMessage message;
		if(from.equals(""))
			from="[e-mail]";
		Properties props = System.getProperties();
		props.put("mail.smtp.host", smtpHost); 
                session=Session.getInstance(props,null);
                message = new MimeMessage(session);
                
                message.setFrom(new InternetAddress(from));
                message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));
                message.setSubject(subject);
                message.setText(comment);
                message.setSentDate(new java.util.Date());
                Transport transport=session.getTransport("smtp");
                transport.connect(smtpHost,id,pwd);
                transport.send(message);
                
        }//send mail
        /**
	*parse string to Chinese Charator in order to 
	*display it correctly
	*@param in the source string to be parsed
	*@return parsed String
	*/
	public String parseChinese(String in)
	{
		String s = null;       
		byte temp [];               
		if (in == null)
		{
		System.out.println("Warn:Chinese null founded!");
		return new String("");
		}
		try
		{
			temp=in.getBytes("iso-8859-1");
			s = new String(temp);
		}catch(UnsupportedEncodingException e)
		{
		System.out.println (e.toString()); 
		}
		return s;
	}
}//~~~~~~~email sender~~~~~~~~