<filter>
    <filter-name>Set Character Encoding</filter-name>
    <filter- class >filters.character_encoding.SetCharacterEncodingFilter</filter- class >
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF- 8 </param-value>
    </init-param>
  </filter>

 package  filters.character_encoding;

 import  java.io.IOException;
 import  javax.servlet.Filter;
 import  javax.servlet.FilterChain;
 import  javax.servlet.FilterConfig;
 import  javax.servlet.ServletException;
 import  javax.servlet.ServletRequest;
 import  javax.servlet.ServletResponse;
 import  javax.servlet.UnavailableException;



 public   class  SetCharacterEncodingFilter  implements  Filter
    {

        
         protected  String encoding =  null ;

       
         protected  FilterConfig filterConfig =  null ;

        
         protected   boolean  ignore = true;

       
         public   void  destroy()
            {

                 this .encoding =  null ;
                 this .filterConfig =  null ;

            }

       
         public   void  doFilter(ServletRequest request, ServletResponse response, FilterChain chain)  throws  IOException,ServletException
            {

               
                 if  (ignore || (request.getCharacterEncoding() ==  null ))
                    {
                        String encoding = selectEncoding(request);
                         if  (encoding !=  null )
                            request.setCharacterEncoding(encoding);
                    }

               

                chain.doFilter(request, response);

            }

       
         public   void  init(FilterConfig filterConfig)  throws  ServletException
            {

                 this .filterConfig = filterConfig;
                 this .encoding = filterConfig.getInitParameter("encoding");
                String value = filterConfig.getInitParameter("ignore");
                 if  (value ==  null )
                     this .ignore = true;
                 else   if  (value.equalsIgnoreCase("true"))
                     this .ignore = true;
                 else   if  (value.equalsIgnoreCase("yes"))
                     this .ignore = true;
                 else 
                     this .ignore = false;

            }

       
         protected  String selectEncoding(ServletRequest request)
            {
                /*
            	String markupLanguage = request.getParameter("markup_language");
                
                if (markupLanguage == null)
                    {
                        return ("Cp1251");
                    }
                else
                    return ("UTF-8");
                */
            	 return  ("Cp1251");
            }

    }

 protected  String selectEncoding(ServletRequest request)
            {
                          	 return  ("Cp1251");
            }

 protected  String selectEncoding(ServletRequest request)
            {
              
            	String markupLanguage = request.getParameter("markup_language");
                
                 if  (markupLanguage ==  null )
                    {
                         return  ("Cp1251");
                    }
                 else 
                     return  ("UTF-8");
          }