解决发邮件错误javax.mail.MessagingException: Could not connect to SMTP host

用java实现发送邮件功能时报错

javax.mail.MessagingException: Could not connect to SMTP host

Exception in thread "main" javax.mail.MessagingException: Could not connect to SMTP host: , port: 465, response: -1at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2041)at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:697)at javax.mail.Service.connect(Service.java:364)at javax.mail.Service.connect(Service.java:245)

解决办法：

props.put(“mail.smtp.ssl.enable”, true);

Properties props = System.getProperties();props.put("mail.smtp.host", "");props.put("mail.smtp.port", 465);props.put("mail.smtp.ssl.enable", true);Session session = Session.getDefaultInstance(props, null);