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."); }}