java发邮件 javamail +mail.jar

/* * To change this template, choose Tools | Templates * and open the template in the editor. */ import java.util.Properties; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.AddressException; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; public class JavaMail { private String host; private String from; private String to; private String subject; private String content; private boolean authentication; private String username; private String password; public void sendMail(String host, String from, String to, String subject, String content, boolean authentication, String username, String password) throws MessagingException { Properties props = System.getProperties(); if(this.host.indexOf("smtp.gmail.com")>=0)//注意此处 加了判断 因为gmail的端口是465 { props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); props.setProperty("mail.smtp.socketFactory.fallback", "false"); props.setProperty("mail.smtp.port", "465"); props.setProperty("mail.smtp.socketFactory.port", "465"); }else{ props.put("mail.smtp.host", host); if (!authentication) { props.put("mail.smtp.auth", "false"); } else { props.put("mail.smtp.auth", "true"); } } Session session = Session.getDefaultInstance(props, null); MimeMessage message = new MimeMessage(session); message.setFrom(new InternetAddress(from)); message.addRecipient(Message.RecipientType.TO, new InternetAddress(to)); message.setSubject(subject); message.setContent(content, "text/html;charset=gb2312"); if (authentication) { Transport smtp = null; try { smtp = session.getTransport("smtp"); smtp.connect(host, username, password); smtp.sendMessage(message, message.getAllRecipients()); } catch (AddressException e) { e.printStackTrace(); } catch (MessagingException e) { e.printStackTrace(); } finally { smtp.close(); } } else { Transport.send(message); } } public void send() throws MessagingException { host = "smtp.sina.com";//smtp服务器 from = "******@sina.com"; to = "to@sina.com"; //发送给谁 subject = "just for test"; //标题 content = "Beijing Olympic"; //内容 authentication = true; username = "******@sina.com"; // 登陆邮件发送服务器的用户名 password = "******"; // 登陆邮件发送服务器的密码 sendMail(host, from, to, subject, content, authentication, username, password); } public static void main(String args[]) throws MessagingException { JavaMail jm = new JavaMail(); jm.send(); } }