使用JavaMail发送邮件（Gmail）

以Gmail服务器为例

输入正确的用户名和密码，然后输入有效的邮箱地址即可实现发送。

代码已经验证通过。

下面是源码

package com.suifeng.mail;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 JavaEmail{    Properties emailProperties;    Session mailSession;    MimeMessage emailMessage;    public static void main(String args[])    {        JavaEmail javaEmail = new JavaEmail();        javaEmail.setMailServerProperties();        try        {            javaEmail.createEmailMessage();            javaEmail.sendEmail();        }        catch (AddressException e)        {            System.out.println("Address Exception:" + e.getMessage());            e.printStackTrace();        }        catch (MessagingException e)        {            System.out.println("Message Exception:" + e.getMessage());            e.printStackTrace();        }    }    public void setMailServerProperties()    {        String emailPort = "587";// gmail's smtp port        emailProperties = System.getProperties();        emailProperties.put("mail.smtp.port", emailPort);        emailProperties.put("mail.smtp.auth", "true");        emailProperties.put("mail.smtp.starttls.enable", "true");    }    public void createEmailMessage() throws AddressException,            MessagingException    {        String[] toEmails =        { "要发送的邮箱" };        String emailSubject = "Java Email";        String emailBody = "This is an email sent by <b>JavaMail</b> api.";        mailSession = Session.getDefaultInstance(emailProperties, null);        emailMessage = new MimeMessage(mailSession);        for (int i = 0; i < toEmails.length; i++)        {            emailMessage.addRecipient(Message.RecipientType.TO,                    new InternetAddress(toEmails[i]));        }        emailMessage.setSubject(emailSubject);        emailMessage.setContent(emailBody, "text/html");// for a html email        // emailMessage.setText(emailBody);// for a text email    }    public void sendEmail() throws AddressException, MessagingException    {        String emailHost = "smtp.gmail.com";        String fromUser = "这里使你的gmail邮箱地址";// just the id alone without        // @gmail.com        String fromUserEmailPassword = "这里使你的gmail密码";        Transport transport = mailSession.getTransport("smtp");        transport.connect(emailHost, fromUser, fromUserEmailPassword);        transport.sendMessage(emailMessage, emailMessage.getAllRecipients());        transport.close();        System.out.println("Email sent successfully.");    }}