发送邮件的util

以前整理的一个util，发出来和大家共享

package com.dbcapital.util;

import java.util.Properties;

import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import com.dbcapital.constant.MailConstant;


/**
 * . *
 * 
 * @author frady
 */
public class Mail {
	String host = "";
	String user = "";
	String password = "";
	public Mail(){
		this.host=MailConstant.SMTP_HOST;
		this.user=MailConstant.SERVICE_ADDRESS;
		this.password=MailConstant.SERVICE_PASSWORD;
	}
	public Mail(String host,String user,String password){
		this.host = host;
		this.user = user;
		this.password = password;
	}
	
	public void send(String to, String subject, String content) {
		Properties props = new Properties();
		props.put("mail.smtp.host", host);
		props.put("mail.smtp.auth", "true");
		try {
			Session mailSession = null;
			try{
				mailSession=Session.getDefaultInstance(props);
			}catch(java.lang.SecurityException e){
				mailSession=Session.getInstance(props);
			}
			Message message = new MimeMessage(mailSession);
			message.setFrom(new InternetAddress(user));
			message.addRecipient(Message.RecipientType.TO, new InternetAddress(
					to));
			
			sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder(); 
			message.setSubject("=?GBK?B?"+enc.encode(subject.getBytes())+"?=");
			message.setContent(content,"text/html;charset=GBK");
			
			message.saveChanges();
			Transport transport = mailSession.getTransport("smtp");
			transport.connect(host, user, password);
			transport.sendMessage(message, message.getAllRecipients());
			transport.close();
		} catch (Exception e) {
			System.out.println(e);
		}
	}
	
	/*
	 * 由于mail协议的设计问题，可以用以下函数发送匿名信
	 */
	public void send(String from, String to, String subject, String content) {
		Properties props = new Properties();
		props.put("mail.smtp.host", host);
		props.put("mail.smtp.auth", "true");
		try {
			Session mailSession = null;
			try{
				mailSession=Session.getDefaultInstance(props);
			}catch(java.lang.SecurityException e){
				mailSession=Session.getInstance(props);
			}
			Message message = new MimeMessage(mailSession);
			message.setFrom(new InternetAddress(from));
			message.addRecipient(Message.RecipientType.TO, new InternetAddress(
					to));
			
			sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder(); 
			message.setSubject("=?GBK?B?"+enc.encode(subject.getBytes())+"?=");
			message.setContent(content,"text/html;charset=GBK");
			
			message.saveChanges();
			Transport transport = mailSession.getTransport("smtp");
			transport.connect(host, user, password);
			transport.sendMessage(message, message.getAllRecipients());
			transport.close();
		} catch (Exception e) {
			System.out.println(e);
		}
	}


}

有可能需要附件的lib，实际上肯定是需要的。