Nginx如何实现一个域名多个端口共用一个证书？

# http自动转https
server {
        listen 80;
        index index.php index.htm index.html; 
        server_name xxx.com www.xxx.com; #监听nginx所在服务器8080端口
        return 301 https://www.xxx.com$request_uri;
 }

#ssl证书配置
server {
        listen 443;
        server_name www.xxx.com;
        ssl on;     
        ssl_certificate  1_xxx.com_bundle.crt;
        ssl_certificate_key  2_xxx.com.key;
        ssl_session_timeout 5m;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2; #按照这个协议配置
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE; #按照这个套件配置
        ssl_prefer_server_ciphers on;
        location / {
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $http_host;
            proxy_set_header X-NginX-Proxy true;
                #你的项目端口号
            proxy_pass http://127.0.0.1:8080/;
            proxy_redirect off;
        }
    }


server {
        listen 443;
        server_name www.xxx.com:8081;
        ssl on;
        ssl_certificate  1_xxx.com_bundle.crt;
        ssl_certificate_key  2_xxx.com.key;
        ssl_session_timeout 5m;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2; #按照这个协议配置
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE; #按照这个套件配置
        ssl_prefer_server_ciphers on;
        location / {
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $http_host;
            proxy_set_header X-NginX-Proxy true;
                #你的项目端口号
                proxy_pass http://127.0.0.1:8081/;
                proxy_redirect off;
                }
        }

如上，我想要配置nginx的ssl证书，8080是我的项目，8081是tomcat图片服务器，现在8080已经有ssl证书了，但是8081没有，运这样配置nginx运行不起来，求解～有什么办法～