properties中加入
properties.setProperty("mail.smtp.auth", "true");//开启认证
properties.setProperty("mail.debug", "true");//启用调试
properties.setProperty("mail.smtp.timeout", "1000");//设置链接超时
properties.setProperty("mail.smtp.port", "465");//设置端口
properties.setProperty("mail.smtp.socketFactory.port", "465");//设置ssl端口
properties.setProperty("mail.smtp.socketFactory.fallback", "false");
properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");