java 用gmail邮件服务器 发送邮件

via TLS

下面代码运行时命令行输入密码会回显，因为实在eclipse下调试，所以System.getConsole.getPassword() 不能用，其他方法又太麻烦，就暂时这样了。另外显示的发送人email地址可以和登录用的gmail地址不一样，但是现在不需要，所以就没加这个功能，需要加

message.setFrom(new InternetAddress("from@no-spam.com"));

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
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 GmailUtil {
    
    /**
     * given gmail account (e.g. **@artinfo.com), and password, send an email to the given address
     * @param fromEmailaddress
     * @param password
     * @param toEmailaddress
     * @param body
     * @param subject
     * @return
     */
    public static boolean sendEMail(String fromEmailaddress, String password, String toEmailaddress, String body, String subject) {
        Properties props = System.getProperties();
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtps.port", Integer.toString(456));
        props.put("mail.smtps.auth", Boolean.toString(true));
        Session session = Session.getDefaultInstance(props, null);

        MimeMessage message = new MimeMessage(session);

        try {

   // 设置不同的发件人        message.setFrom(new InternetAddress("from@no-spam.com"));

            message.addRecipient(Message.RecipientType.TO, new InternetAddress(toEmailaddress));
            message.setSubject(subject);
            message.setContent(body, "text/html");

            Transport tr = session.getTransport("smtps");
            tr.connect( "smtp.gmail.com", 465, fromEmailaddress, password);
            tr.sendMessage(message, message.getAllRecipients());
            tr.close();
        } catch (AddressException e) {
            e.printStackTrace();
            return false;
        } catch (MessagingException e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }
    
     public static void main(String[] args) {

            BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        
            String userEmail = null;
            String pass = null;
            String toEmail = null;
            String emailBody = null;
            String emailSubject = null;
            
            try {
                    System.out.println("==Please input your gmail address==：");
                userEmail = in.readLine();
                System.out.println("==Please input your gmail password==：");
                pass = in.readLine();
                System.out.println("==Please input email address to send to==：");
                toEmail = in.readLine();
                System.out.println("==Please input your email body==：");
                emailBody = in.readLine();
                System.out.println("==Please input your email subject==：");
                emailSubject = in.readLine();
                    
            } catch (IOException e) {
                e.printStackTrace();
            }


            GmailUtil.sendEMail(userEmail, pass, toEmail, emailBody, emailSubject);
            
            
            
        }

}

下面这个带ssl安全连结，从下面这个地方看到，但是我没测试过：

http://www.mkyong.com/java/javamail-api-sending-email-via-gmail-smtp-example/

Send an Email via Gmail SMTP server using SSL connection.

package com.mkyong.common;
 
import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
 
public class SendMailSSL {
	public static void main(String[] args) {
		Properties props = new Properties();
		props.put("mail.smtp.host", "smtp.gmail.com");
		props.put("mail.smtp.socketFactory.port", "465");
		props.put("mail.smtp.socketFactory.class",
				"javax.net.ssl.SSLSocketFactory");
		props.put("mail.smtp.auth", "true");
		props.put("mail.smtp.port", "465");
 
		Session session = Session.getDefaultInstance(props,
			new javax.mail.Authenticator() {
				protected PasswordAuthentication getPasswordAuthentication() {
					return new PasswordAuthentication("username","password");
				}
			});
 
		try {
 
			Message message = new MimeMessage(session);
			message.setFrom(new InternetAddress("from@no-spam.com"));
			message.setRecipients(Message.RecipientType.TO,
					InternetAddress.parse("to@no-spam.com"));
			message.setSubject("Testing Subject");
			message.setText("Dear Mail Crawler," +
					"\n\n No spam to my email, please!");
 
			Transport.send(message);
 
			System.out.println("Done");
 
		} catch (MessagingException e) {
			throw new RuntimeException(e);
		}
	}
}