Spring 3 MVC 从控制器访问 HttpRequest

发布于 2024-12-21 15:25:23 字数 590 浏览 0 评论 0原文

我想自己处理请求和会话属性，而不是将其留给 spring @SessionAttributes，例如用于 cookie 处理的登录。

我只是不知道如何从控制器内访问 HttpRequest，我需要一种方法来访问 @RequestAttribute 之上的一层并访问 HttpRequest< /代码>本身。 Stripes 用于通过实现 ApplicationContext 并调用 getAttribute() 来实现此目的。

另外，将 HttpServletRequest 作为参数传递似乎不起作用：

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

上述方法不会打印任何内容。

您对此有什么建议吗？

原文

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?

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黑色毁心梦 2024-12-28 15:25:23

如果您只需将 HttpRequest 添加到控制器方法签名中，Spring MVC 就会为您提供 HttpRequest：

例如：

/**
 * 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(...);

}

如您所见，只需将 HttpServletRequest 和 HttpServletResponse 对象添加到签名即可Spring MVC 将这些对象传递给您的控制器方法。您还需要 HttpSession 对象。

编辑：似乎 HttpServletRequest/Response 对于 Spring 3 下的某些人不起作用。尝试使用 Spring WebRequest/WebResponse 对象，正如 Eduardo Zola 指出的那样。

我强烈建议您查看 Spring MVC 能够自动神奇地注入到您的处理程序方法中的支持参数列表。

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.

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遗忘曾经 2024-12-28 15:25:23

我知道这是一个老问题，但是...

您也可以在您的类中使用它：

@Autowired
private HttpServletRequest context;

这将提供 HttpServletRequest 的当前实例，供您在您的方法中使用。

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.

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风柔一江水 2024-12-28 15:25:23

另一种方法是使用 RequestContextHolder ，例如：（自：2.0）

RequestContextHolder Holder 类以线程绑定的 RequestAttributes 对象的形式公开 Web 请求。如果可继承标志设置为 true，则当前线程生成的任何子线程都会继承该请求。

HttpServletRequest req = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();

Another way is to use RequestContextHolder like: (Since: 2.0)

RequestContextHolder Holder class to expose the web request in the form of a thread-bound RequestAttributes object. The request will be inherited by any child threads spawned by the current thread if the inheritable flag is set to true.

HttpServletRequest req = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();

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铁憨憨 2024-12-28 15:25:23

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

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

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