404 error redirect in Spring with Java config

Question

As you know, in XML, the way to configure this is:

<error-page>
    <error-code>404</error-code>
    <location>/my-custom-page-not-found.html</location>
</error-page>

But I haven't found a way to do it in Java config. The first way I tried was:

@RequestMapping(value = "/**")
public String Error(){
    return "error";
}

And it appeared to work, but it has conflicts retrieving the resources.

Is there a way to do it?

Answer 1

In Spring Framework, there are number of ways of handing exceptions (and particularly 404 error). Here is a documentation link.

• First, you can still use error-page tag in web.xml, and customize error page. Here is an example.

• Second, you can use one @ExceptionHandler for all controllers, like this:

  @ControllerAdvice
  public class ControllerAdvisor {
  
       @ExceptionHandler(NoHandlerFoundException.class)
       public String handle(Exception ex) {
  
          return "404";//this is view name
      }
  }
  

  For this to work, set throwExceptionIfNoHandlerFound property to true for DispatcherServlet in web.xml:

  <init-param>
      <param-name>throwExceptionIfNoHandlerFound</param-name>
      <param-value>true</param-value>
  </init-param>
  

  You can also pass some objects to error view, see javadoc for this.