Spring 3 MVC accessing HttpRequest from controller

问题

I would like to handle request and session attributes myself rather then leave it to spring @SessionAttributes, for login of cookies handling for example.

I just cant figure out how could I access the HttpRequest from within a controller, I need a way to go a layer above the @RequestAttribute and access the HttpRequest itself. With Stripes in used to do this by implementing an ApplicationContext and calling getAttribute().

Also, passing the HttpServletRequest as parameter seems not to be working:

@RequestMapping(value="/") public String home(HttpServletRequest request){
    System.out.println(""+request.getSession().getCreationTime());
    return "home"; 
}

The above method does not print anything.

Do you have any advice on this?

回答1:

Spring MVC will give you the HttpRequest if you just add it to your controller method signature:

For instance:

/**
 * Generate a PDF report...
 */
@RequestMapping(value = "/report/{objectId}", method = RequestMethod.GET)
public @ResponseBody void generateReport(
        @PathVariable("objectId") Long objectId, 
        HttpServletRequest request, 
        HttpServletResponse response) {

    // ...
    // Here you can use the request and response objects like:
    // response.setContentType("application/pdf");
    // response.getOutputStream().write(...);

}

As you see, simply adding the HttpServletRequest and HttpServletResponse objects to the signature makes Spring MVC to pass those objects to your controller method. You'll want the HttpSession object too.

EDIT: It seems that HttpServletRequest/Response are not working for some people under Spring 3. Try using Spring WebRequest/WebResponse objects as Eduardo Zola pointed out.

I strongly recommend you to have a look at the list of supported arguments that Spring MVC is able to auto-magically inject to your handler methods.

回答2:

I know that is a old question, but...

You can also use this in your class:

@Autowired
private HttpServletRequest context;

And this will provide the current instance of HttpServletRequest for you use on your method.

回答3:

@RequestMapping(value="/") public String home(HttpServletRequest request){
    System.out.println("My Attribute :: "+request.getAttribute("YourAttributeName"));
    return "home"; 
}

来源：https://stackoverflow.com/questions/8504258/spring-3-mvc-accessing-httprequest-from-controller

标签

spring-mvc

httprequest

httpsession

request-mapping