How do you add custom response headers in a Spring Boot application?

• To add custom response headers in a Spring boot application use ResponeEntity class.
  
  • Set the values using HttpHeader object.
    
  • Set the header object in response entity

• To set a response header for all the response , implement a Filter class and set the header in the ServletResponse class
  
• Code Snippet
  

@Component
public class ResFilter implements Filter {

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        HttpServletResponse httpServletResponse = (HttpServletResponse) servletResponse;
        httpServletResponse.setHeader("header name", "header value");
        filterChain.doFilter(servletRequest, servletResponse);

    }

• Output of the above 2 code snippets

• Code : https://github.com/rajeshsgr/custom-response-svc

Thank You !!