java request.getServerPort 与实际不一致

nginx 监听的服务器的9000 端口，转的443 到tomcat 中，但是在java web jsp中获取的端口却还是443.

nginx 配置

location /xxx{
        proxy_pass https://localhost:9020;
        client_max_body_size    1000m; 
        proxy_redirect    off;
        # 此处header 需要增加$server_port 即可
        proxy_set_header Host $host:$server_port;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header REMOTE-HOST $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header User-Agent $http_user_agent;
        proxy_set_header header_userid $http_header_userid;
        proxy_set_header user_type $http_user_type;
        #防止网页被Frame
        add_header X-Frame-Options SAMEORIGIN;
    }

修改:

proxy_set_header Host $host:$server_port;

此时再看jsp中的request.getServerPort() 就是当前监听的了。