emailbean.java

包含了很多JAVA的例子,适合初学者用来参考一下,谢谢支持.

package myMailSender;       

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Properties;

import javax.mail.*;
import javax.mail.internet.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class EmailBean  {

   //defaults
   	private final static String DEFAULT_CONTENT = "Unknown content";
   	private final static String DEFAULT_SUBJECT= "Unknown subject";
   	private static String DEFAULT_SERVER = null;
   	private static String DEFAULT_TO = null;
   	private static String DEFAULT_FROM = null;
   	private static String DEFAULT_MBOX= null;
	private static String DEFAULT_PROTOCOL= null;
	private static String DEFAULT_PASSWD= null;
	private static String DEFAULT_USER= null;
   	static{
    	java.util.ResourceBundle bundle = 
     	java.util.ResourceBundle.getBundle("myMailSender.mailDefaults"); 

	   	DEFAULT_SERVER = bundle.getString("DEFAULT_SERVER");
	   	DEFAULT_TO = bundle.getString("DEFAULT_TO");
	   	DEFAULT_FROM = bundle.getString("DEFAULT_FROM");
	   
	   	System.out.println("DEFAULT_SERVER: " + DEFAULT_SERVER);
   }

    //JavaBean properties
	private String smtpHost;
	private String to;
	private String from;
	private String content;
	private String subject;
	
	private String user;
	private String passwd;
	private String protocol;
	private String mbox; 
    
    public void sendMessage() throws Exception {
     	
     	Properties properties = System.getProperties();
	
		//populate the 'Properties' object with the mail
		//server address, so that the default 'Session'
		//instance can use it.
		properties.put("mail.smtp.host", smtpHost);
		properties.put("mail.smtp.from", from); 
		properties.put("mail.transport.protocol", protocol); 
		
		//使用邮箱服务器如 SMTP.TOM.COM 发送邮件需要用户认证
   		//Session session = Session.getDefaultInstance(properties);
   		properties.put( "mail.smtp.auth", "true"); 
   		Authenticator auth = new SMTPAuthenticator(user,passwd);
		Session session = Session.getInstance(properties, auth);
		
		session.setDebug(true);
		Message mailMsg = new MimeMessage(session);//a new email message
		InternetAddress[] addresses = null;
		
		try {
		if (to != null) {
		  //throws 'AddressException' if the 'to' email address
		  //violates RFC822 syntax
		  addresses = InternetAddress.parse(to, false);
		  mailMsg.setRecipients(Message.RecipientType.TO, addresses);
		} else {
		  throw new MessagingException("The mail message requires a 'To' address.");
		}
		if (from != null) {
		  mailMsg.setFrom(new InternetAddress(from));
		} else {
		  throw new MessagingException(
		    "The mail message requires a valid 'From' address.");
		} 
		if (subject != null)
		  mailMsg.setSubject(subject);
		if (content != null)
		  mailMsg.setText(content);
		
		//Finally, send the mail message; throws a 'SendFailedException' 
		//if any of the message's recipients have an invalid address
		Transport.send(mailMsg);
		} catch (Exception exc) { throw exc;}
  	}//sendMessage

	public void setSmtpHost(String host){
        if (check(host)){
        this.smtpHost = host;
        } else {
    	this.smtpHost = EmailBean.DEFAULT_SERVER;
        }
    }
    
	public void setTo(String to){
        if (check(to)){
        this.to = to;
        } else {
    	this.to = EmailBean.DEFAULT_TO;
        }
    }
    
	public void setFrom(String from){
        if (check(from)){
        this.from = from;
        } else {
    	this.from = EmailBean.DEFAULT_FROM;
        }
    }
    
	public void setContent(String content){
        if (check(content)){
        this.content = content;
        } else {
    	this.content = EmailBean.DEFAULT_CONTENT;
        }
    }
    
	public void setSubject(String subject){
        if (check(subject)){
        this.subject = subject;
        } else {
    	this.subject = EmailBean.DEFAULT_SUBJECT;
        }
    }
    
    public void setUser(String user){
        if (check(user)){
        this.user = user;
        } else {
    	this.user = EmailBean.DEFAULT_USER;
        }
    }
	public void setPasswd(String passwd){
        if (check(passwd)){
        this.passwd = passwd;
        } else {
    	this.passwd = EmailBean.DEFAULT_PASSWD;
        }
    }
	public void setProtocol(String protocol){
        if (check(protocol)){
        this.protocol = protocol;
        } else {
    	this.protocol = EmailBean.DEFAULT_PROTOCOL;
        }
    }
	public void setMbox(String mbox){
        if (check(mbox)){
        this.mbox = mbox;
        } else {
    	this.mbox = EmailBean.DEFAULT_MBOX;
        }
    }

	private boolean check(String value){
        if(value == null || value.equals(""))
            return false;
    	return true;
    }
}

class SMTPAuthenticator extends javax.mail.Authenticator {
	private String user;
	private String passwd;
	public SMTPAuthenticator(String user,String passwd){
		this.user=user;
		this.passwd=passwd;
	}
	public PasswordAuthentication getPasswordAuthentication() {
		return new PasswordAuthentication (user, passwd); 
	}
}