发送邮件附件名tcmime.*.bin

1. 默认java关于邮箱的参数splitlongparameters为true, 即太长会处理为.bin

static {
        System.setProperty("mail.mime.splitlongparameters", "false");
    }

2. 中文附件名乱码

MimeUtility.encodeText(fileName, "UTF-8", "B");