1. Nginx 通配符匹配

按照匹配规则的优先级，由高到低：

= 表示精确匹配

^~ 表示uri以某个常规字符串开头,大多情况下用来匹配url路径，nginx不对url做编码，因此请求为/static/20%/aa，可以被规则^~ /static/ /aa匹配到（注意是空格，即所见即所得）。

~ 正则匹配(区分大小写)

~* 正则匹配(不区分大小写)

!~ 和 !~*  分别为区分大小写不匹配及不区分大小写不匹配 的正则

/ 任何请求都会匹配

2. Nginx 通配符优先级

       首先匹配 =，其次匹配 ^~, 其次是按文件中顺序的正则匹配，最后是交给 / 通用匹配。当有匹配成功时候，停止匹配，按当前匹配规则处理请求。

location = / {  
   #规则A  
}  
location = /login {  
   #规则B  
}  
location ^~ /static/ {  
   #规则C  
}  
location ~ \.(gif|jpg|png|js|css)$ {  
   #规则D  
}  
location ~* \.png$ {  
   #规则E  
}  
location !~ \.xhtml$ {  
   #规则F  
}  
location !~* \.xhtml$ {  
   #规则G  
}  
location / {  
   #规则H  
}  

访问根目录/， 比如http://localhost/ 将匹配规则A

访问 http://localhost/login 将匹配规则B，http://localhost/register 则匹配规则H

访问 http://localhost/static/a.html 将匹配规则C

访问 http://localhost/a.gif, http://localhost/b.jpg 将匹配规则D，规则E不起作用，而 http://localhost/static/c.png 则优先匹配到规则C

访问 http://localhost/a.PNG 则匹配规则E，而不会匹配规则D，因为规则E不区分大小写。

访问 http://localhost/a.xhtml 不会匹配规则F和规则G，http://localhost/a.XHTML不会匹配规则G，因为不区分大小写。规则F，规则G属于排除法，符合匹配规则但是不会匹配到，所以想想看实际应用中哪里会用到。

访问 http://localhost/category/id/1111 则最终匹配到规则H，因为以上规则都不匹配，这个时候应该是nginx转发请求给后端应用服务器，比如FastCGI（php），tomcat（jsp），nginx作为方向代理服务器存在。

3.简单通用配置

  静态动态分离，除了静态资源以外的请求都交给Tomcat处理.

location / {  
    proxy_pass http://[tomcatip]:[80]
}  

location ^~ /static/ {  
    root /webroot/static/;  
}  

location ~* \.(html|htm|gif|jpg|jpeg|bmp|png|ico|txt|js|css)$ {  
    root /webroot/res/;  
}  

4.生产环境配置举例

  生产环境的配置文件主要分布在三个文件夹中：conf、conf.d 、default.d。起到的作用可以自己定义的。

4.1 nginx.conf

#user  nobody;
worker_processes  auto;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;

worker_rlimit_nofile 10240;

events {
    use epoll;
    worker_connections  10240;
}


http {
    include       mime.types;
    default_type  application/octet-stream;
    server_names_hash_bucket_size 128;
    large_client_header_buffers 4 64k;
    client_max_body_size 20m;
    #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;

    #keepalive_timeout  0;
    keepalive_timeout  65;
    fastcgi_connect_timeout 300;
    fastcgi_send_timeout 300;
    fastcgi_read_timeout 300;
    fastcgi_buffer_size 64k;
    fastcgi_buffers 4 64k;
    fastcgi_busy_buffers_size 128k;
    fastcgi_temp_file_write_size 128k;
    

    gzip  on;
    gzip_min_length 1k;    
    gzip_buffers 4 16k;    
    gzip_http_version 1.1;    
    gzip_comp_level 3;   
    gzip_types text/plain application/x-javascript text/css application/xml; 
    gzip_vary on;

    include /usr/local/nginx/conf.d/*.conf;

    server {
        listen       80;
        server_name  172.16.19.114;

        include /usr/local/nginx/default.d/*.conf;
        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        # location / {
        #     root   html;
        #     index  index.html index.htm;
        # }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}

4.2 upstream.conf 

#设置tomcat负载均衡主机
upstream tomcatHost {
    least_conn;
    server 172.16.19.114:8081 weight=100 max_fails=12 fail_timeout=60s;
    keepalive 768;
    }

4.3 location.conf

#设置host主机
	#以frk开头的服务
    location ^~frk {
        proxy_pass http://tomcatHost;
        }
        
	#以_web结尾的服务
    location ~*_web {
        root /usr/local/nginx/webapps/;
        index index.html index.htm;
        }
        
	#以_service结尾的服务
    location ~*_service {
        proxy_pass http://tomcatHost;
        }
        
	#以public为路径的服务
    location /public/ {
        proxy_pass http://tomcatHost;
        }
        
	#默认服务
    location / {
        alias /usr/local/nginx/webapps/portal_web;
        index index.html index.htm;
        }