iamadreamer

Add/Modify Header Values in Java HttpServletRequest using Servlet Filters Steps to Modify Request Headers in a Servlet Request. This example will demonstrate how to modify 'Content-Type' header in Java Servlet Filter. In order to achieve this, use a custom wrapper Class, that extends HttpServletRequestWrapper. Thereafter, we need to override certain methods inside this custom Class. getHeader(String name) getHeaders(String name) getHeaderNames() getParameter(final String name) Code snippet for overriding above methods.     @Override     public String getHeader(String name) {     String header = super.getHeader(name); if ("content-type".equalsIgnoreCase(name)){ System.out.println("Adds Header Content-Type as application/json"); return "application/json"; }         return header;     }          @Override     public Enumeration getHeaders(String name) {         List values = Collection