location / {
            root   /www;
            index  index.php index.html index.htm;
            if (-f $request_filename/index.html){
                    rewrite (.*) $1/index.html break;
            }
            if (-f $request_filename/index.php){
                    rewrite (.*) $1/index.php;
            }
            if (!-f $request_filename){
                    rewrite (.*) /index.php;
            }
        }

完美支持中文，亲测成功。添加在Location｛｝中间。