public class ContentTypeJSPFilter implements Filter {
  private String contentType;

  public void init(FilterConfig filterConfig) throws ServletException {
    contentType =  "text/html;charset=windows-1251 ";
  }

  public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
    HttpServletResponse res = (HttpServletResponse)servletResponse;
    res.setContentType(contentType);
    filterChain.doFilter(servletRequest,  servletResponse);
  }

  public void destroy() {

  }
}

  <filter>
    <filter-name>CharsetFilter</filter-name>
    <filter-class>com.bp.warm.filters.ContentTypeJSPFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>CharsetFilter</filter-name>
    <url-pattern>*.jsp</url-pattern>
  </filter-mapping>

<%@ page contentType= "text/html;charset=windows-1251 "%>