1.导入activation.jar和mail.jar连个文件 2.关键代码如下: package com.test; import java.util.Properties; import javax.mail.Address; import javax.mail.Message; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMessage.RecipientType; public class SendEmial { public static void main(String[] args) { //创建邮件会话 Properties prop = new Properties(); prop.put("mail.transport.protocol","smtp"); prop.put("mail.smtp.port","25"); prop.put("mail.smtp.host", "127.0.0.1"); Session s = Session.getDefaultInstance(prop); //新建一个消息对象 Message msg = new MimeMessage(s); try { //发信人 Address from = new InternetAddress("a@zsw.com"); //收信人 Address to = new InternetAddress("b@zsw.com"); msg.setFrom(from); msg.setRecipient(RecipientType.TO, to); msg.setSubject("标题");//标题 msg.setText("ddddddddddddddddddddddddddddddddddddddddBB"); //邮件内容 Transport.send(msg); //发送邮件 } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }