加入一个全局转义：
rewrite ^(.*)\;jsessionid=(.*)$ $1 break;
例如：
server {
listen 80;
server_name *.xxx.com *.mall.xxx.com;
#charset koi8-r;
#access_log logs/host.access.log main;
root /data/app/xnradmin/;
index login.jsp index.jsp;
rewrite ^(.*)\;jsessionid=(.*)$ $1 break;
# location / {
# root /data/app/xnradmin/;
# index index.html index.htm index.jsp;
# proxy_pass http://localhost:8080;
# }
location ~ \.(jsp|do|action)$ {
