1、在我的资源库里面下载支持的jar包，下载地址：

2、测试代码：

package com.email.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;  public class TestEmail { 	public void SendEmailTest() { 		Properties props = new Properties(); 		props.put("mail.smtp.host", "smtp.qq.com"); 		props.put("mail.smtp.auth", "true"); // 允许smtp校验 		Session sendMailSession = Session.getInstance(props, null);  		try { 			Transport transport = sendMailSession.getTransport("smtp"); 			// 连接你的QQ，注意用户名和密码必须填写正确，否则权限得不到 			transport.connect("smtp.qq.com", "3693352@qq.com", "****"); 			Message newMessage = new MimeMessage(sendMailSession);  			// 设置mail主题 			String mail_subject = "更改邮件发送人测试"; 			newMessage.setSubject(mail_subject);  			// 设置发信人地址 			String strFrom = "517122199@qq.com"; 			strFrom = new String(strFrom.getBytes(), "iso-8859-1"); 			newMessage.setFrom(new InternetAddress(strFrom)); 			// Address addressFrom[] = { new 			// InternetAddress("617334015@qq.com"),new 			// InternetAddress("goodnight0002@163.com") }; 			// 改变发件人地址 			// newMessage.addFrom(addressFrom); 			// 设置收件人地址 			Address addressTo[] = { new InternetAddress("306220165@qq.com") }; 			newMessage.setRecipients(Message.RecipientType.TO, addressTo);  			// 设置mail正文 			newMessage.setSentDate(new java.util.Date()); 			String mail_text = "java实现邮件发送！"; 			newMessage.setText(mail_text);  			newMessage.saveChanges(); // 保存发送信息 			transport.sendMessage(newMessage, newMessage 					.getRecipients(Message.RecipientType.TO)); // 发送邮件  			transport.close(); 			// Transport.send(newMessage); 			System.out.println("发送成功!"); 		} catch (Exception e) { 			System.out.println("发送失败！"); 			System.out.println(e); 		}  	}  	public static void main(String args[]) throws Exception { 		TestEmail SEmail = new TestEmail(); 		SEmail.SendEmailTest(); 	} }

1）在初次进行发送的时候，必须将你的邮箱设置为允许smtp校验，否则邮件发送不出去

2）填写正确的邮件权限、邮件名称和密码，否则会抛出异常