系统：Linux Centos 7.4 x64
软件：Nginx 1.12.2
注：需要阿里云申请本地域名与证书并添加下载到本地。

注：证书文件为 xxxx.pem 与 xxxx.key 两个文件。
Nginx 配置文件内添加HTTPS

vim /etc/nginx/nginx.conf

http {

server {

listen 443 ssl;
server_name xxx.xxx.com;
ssl on;
root /;
index index.html index.htm;
ssl_certificate   /etc/nginx/cert/215058739960601.pem;
ssl_certificate_key  /etc/nginx/cert/215058739960601.key;
ssl_session_timeout 5m;
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
location / {
    root /;
    index index.html index.htm;
}

}
}
含注释
http {

server {

# 启动443端口
listen 443 ssl;
# 证书申请的域名
server_name xxx.xxx.com;
# 开启SSL协议
ssl on;
# 指定访问根目录
root /;
# 指定索引
index index.html index.htm;    
# 指定xxx.pem证书文件
ssl_certificate   /etc/nginx/cert/215058739960601.pem;
# 指定xxx.key证书文件
ssl_certificate_key  /etc/nginx/cert/215058739960601.key;    
ssl_session_timeout 5m;
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
# 指定访问目录及索引
location / {
    root /;
    index index.html index.htm;
}

}

}