nginx+tomcat 数字无法提交的问题

碰到一个很诡异的问题，表单若干数据，但是value=“数字”的数据无法提交到服务器。
服务器nginx+tomcat 代理给tomcat处理
诡异的是什么呢， 比如hidden为1无法提交、改为1.0就可以了
有时候name=xxx.bbb value=40 这样的表单值也无法提交上去
采用了struts2
我怀疑是nginx配置的问题，页面提交后数据其实提交给了nginx代理过去的时候应该是被过滤掉了，帮忙解决一下。
nginx.conf:

#user  nobody;
worker_processes  2;
 
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;
 
#pid        logs/nginx.pid;
 
events { 
    use epoll;
    # 每个工作进程允许最大的同时连接数
    worker_connections  4000;
} 
 
 
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;
 
    #sendfile        on;
    #tcp_nopush     on;
 
    server_names_hash_bucket_size 128;
    client_header_buffer_size 32k;
    large_client_header_buffers 4 32k;
    client_max_body_size 5M;
     
    #keepalive_timeout  0;
    keepalive_timeout  65;
 
    gzip  on;
    gzip_http_version 1.0;
    gzip_min_length 1000;
    gzip_buffers 4 8k;
    gzip_comp_level 5;
    gzip_disable "MSIE [1-6].";
    gzip_types text/plain application/x-javascript text/css text/javascript application/xml;
    gzip_vary on;
    server {
        listen 80;
        server_name url.com;
        rewrite ^ http://www.url.com$request_uri?;
    }
    server {
        listen   80;
        server_name  www.url.com;
        index index.html index.jsp index.htm;
        root /home/www/ROOT;
        error_page 404 http://www.url.com/404error.html;
        error_page 500 502 503 504  http://www.url.com/500error.html;
        error_log on;
         
        location ~.*.(jsp|action|do)$ {
            index /home/www/ROOT/index.html;
            proxy_pass http://localhost:8080;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Via "nginx";
        }
         
        #dwr
        location ~ /dwr/* {
            proxy_pass http://localhost:8080;
        }
         
        location ~.*\.(gif|jpg|png|bmp|swf)$ {
            expires 24h;
        }
 
        location ~.*\.(js|css|html|htm)?$ {
            expires 24h;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
        location ~ /\.ht {
            deny  all;
        }
    }
}

配置不当之处请指出