Custom 404 error page not working with Struts 2

Question

I am converting a JSP/Servlet dynamic web project to Struts 2 and the custom error pages (that previously worked with the JSP/Servlet version) have stopped working.

When

Answer 1

Instead of custom error page create a custom error action that returns a result to a custom error page.

struts.xml:

<action name "error" class="ErrorAction">
  <result name="404">/404.jsp</result>
  <result name="500">/500.jsp</result>
</action> 

ErrorAction:

public class ErrorAction extends ActionSupport {

  private Integer statusCode;
  //getter and setter

  @Override
  public String execute() {
    if (stausCode != null)
    switch (statusCode){
      case 404:
        return "404";
      case 500:
        return "500";
    }
  }
}

web.xml:

<error-page>
    <error-code>404</error-code>
    <location>/error_code.jsp</location>
</error-page>

<error-page>
    <error-code>500</error-code>
    <location>/error_code.jsp</location>
</error-page>

error_code.jsp:

<% 
 Integer statusCode = (Integer) request
                       .getAttribute("javax.servlet.error.status_code");

 response.sendRedirect(pageContext.getServletContext().getContextPath()
                       +"/error?statusCode="+statusCode ); 
%>

Answer 2

You are calling a JSP directly, and trying to use a Struts tag inside it:

6: <s:include value="css/style2.css" />

Turn this to plain html and it will work.

Otherwise, you need to call an action.