1，未配置前Nginx的配置

       server {
            listen 80;
        server_name www.***.cn;
        return 301 https://$server_name$request_uri;

        location / {
#                            proxy_pass http://localhost:8080;
#                            proxy_redirect off;
#                            proxy_set_header Host $host;
#                            proxy_set_header X
 
-Forwarded-For $proxy_add_x_forwarded_for;
#                            proxy_set_header X-Real-IP $remote_addr;                                                       
                            }
#            #rewrite ^(.*) https://$server_name$1 permanent;
#            
       }

        server {            
            listen 
 
443 ssl;
            server_name www.***.cn;

            ssl_certificate    /etc/nginx/cert/4369939_www.***.cn.pem;
            ssl_certificate_key   /etc/nginx/cert/4369939_www.***.cn.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 / { 
#                proxy_set_header X-Real-IP $remote_addr;
#                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                               proxy_cookie_path / "/; httponly; secure; SameSite=Lax";
#                proxy_set_header X-Forwarded-Proto https;
#                proxy_set_header Host $http_host;
#                proxy_set_header X-NginX-Proxy true;
                proxy_pass http://localhost:8080;
#                proxy_redirect on;
            }   
        }

2，修改後的配置，新增紅色字型帶下劃線的配置後就解決NginxURL地址無效問題，但是瀏覽器控制檯會出現

Mixed Content: The page at ‘https://XXX’ was loaded over HTTPS, but requested an insecure........報錯，

在使用tomcat+nginx時。Nginx使用https，tomcat使用http。使用iframe之類框架，在重定向時會出現以上問題導致頁面載入不出來。這是因為Tomcat不能知道Nginx發來的是http還是https。

讓tomcat知道nginx發來的是http還是https。預設情況下，nginx得到的https的訪問會以http的方式發給負載的tomcat。

解決方法：

　　1.加入下面藍色字型配置

　　2.在tomcat的server.xmlEngine 模組下配置一個 Value，最後重啟tomcat和Nginx即可。

<Valve className="org.apache.catalina.valves.RemoteIpValve"

remoteIpHeader="X-Forwarded-For" protocolHeader="X-Forwarded-Proto"

protocolHeaderHttpsValue="https"/>

借鑑：https://blog.csdn.net/qq_27114677/article/details/77848078

server {
                listen 80;
                server_name www.***.cn;
                return 301 https://$server_name$request_uri;

                location / {
#                                                       proxy_pass http://localhost:8080;
#                                                       proxy_redirect off;
#                                                       proxy_set_header Host $host;
#                                                       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
#                                                       proxy_set_header X-Real-IP $remote_addr;
                                                        }
#                       #rewrite ^(.*) https://$server_name$1 permanent;
#
       }

                server {
                        listen 443 ssl;
                        server_name www.***.cn;

                        ssl_certificate    /etc/nginx/cert/4369939_www.***.cn.pem;
                        ssl_certificate_key   /etc/nginx/cert/4369939_www.***.cn.key;
                        ssl_session_timeout 5m;
                        ssl_protocols TLSv1.2 TLSv1.3;
                        ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
                        ssl_prefer_server_ciphers off;

                        rewrite https://$server_name/login permanent;

                        location / {
                                proxy_set_header X-Real-IP $remote_addr;
                                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                                proxy_cookie_path / "/; httponly; secure; SameSite=Lax";
                                proxy_set_header X-Forwarded-Proto https;
                                proxy_set_header Host $Host:$server_port;
#                               proxy_set_header X-NginX-Proxy true;
                                proxy_pass http://localhost:8080;
#                               proxy_redirect on;
                        }
                }