spring emil简单应用及常见问题
简单示例: 这里只是为了说明使用。实际应用中设置在bean中即可

JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();javaMailSender.setHost("smtp.126.com");   //设置邮箱服务器javaMailSender.setUsername("username");  //设置用户名（要与发送人相一致）javaMailSender.setPassword("password");   //密码SimpleMailMessage simpleMailMessage = new SimpleMailMessage();simpleMailMessage.setSubject("this test");simpleMailMessage.setTo("to@mail.com");simpleMailMessage.setFrom("from@amil.com"); //与上面要一致，不然也会出错simpleMailMessage.setText("this is test!!!!!!!!");Properties props = new Properties();  //此处必须设置，props.put("mail.smtp.auth", "true");  //不设置会出现 553错误，见错误1javaMailSender.setJavaMailProperties(props);  javaMailSender.send(simpleMailMessage);  //发送

错误1：

com.sun.mail.smtp.SMTPSendFailedException: 553 authentication is required,smtp4,jdKowLC7owA_aM1M2eDNAA--.4000S2 1288529984

错误2：如果出现此错误，少个mail.jar文件，把下面文件加上即可

Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/MessagingExceptionat TestMial.main(TestMial.java:21)