[提问]nginx 的rewrite 规则书写有关问题

user  www www; worker_processes  1; error_log  logs/error.log; #error_log  logs/error.log  notice; #error_log  logs/error.log  info; pid        logs/nginx.pid; events {     use                     epoll;     worker_connections  1024; } http {     include       mime.types;     default_type  application/octet-stream;     #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '     #                  '$status $body_bytes_sent "$http_referer" '     #                  '"$http_user_agent" "$http_x_forwarded_for"';     #access_log  logs/access.log  main;     charset         gb2312;     sendfile        on;     tcp_nopush     on;     tcp_nodelay on;     client_body_buffer_size 512k;     proxy_connect_timeout   5;     proxy_read_timeout      60;     proxy_send_timeout     5;     proxy_buffer_size     16k;     proxy_buffers        4 64k;     proxy_busy_buffers_size 128k;     proxy_temp_file_write_size  128k;         #keepalive_timeout  0;     keepalive_timeout  65;     gzip  on;     gzip_min_length  1k;     gzip_http_version 1.1;     gzip_buffers 4  16k;     gzip_comp_level  2;     gzip_types text/plain application/x-javascript text/css application/xml;     gzip_vary on;     upstream tomcat_server {     server 192.168.0.129:8080;    }     server {         listen       80;         server_name  www.9uyou.com;     index        index.html index.htm index.jsp index.do default.jsp default.do;        root /home/www;       if ( -d $request_filename)       {         rewrite ^/(.*)([^/])$ http://$host/$1$2/ permanent;       }             location ~ \.(jsp|jspx|do)?$ {         proxy_set_header Host $host;         proxy_set_header X-Forwarded-For  $remote_addr;         proxy_pass http://tomcat_server;         }         location ~ .*\.(gif|jpeg|jpg|png|bmp|swf)$         {          expires 30d;         }        location ~ .*\.(js|css)?$        {         expires 1h;        }        access_log off;        } }