Spring MVC:所有请求中的通用参数 [英] Spring MVC : Common param in all requests

问题描述

我的Spring MVC Web应用程序中有很多控制器，并且有一个参数mandatoryParam可以说，在对Web应用程序的所有请求中都必须包含该参数.

I have many controllers in my Spring MVC web application and there is a param mandatoryParam let's say which has to be present in all the requests to the web application.

现在，我想使该参数值可用于我的Web层和服务层中的所有方法.如何有效处理这种情况?

Now I want to make that param-value available to all the methods in my web-layer and service-layer. How can I handle this scenario effectively?

目前，我以这种方式处理它:

... controllerMethod( @RequestParam字符串requiredParam ，...)

，然后通过调用其方法将此参数传递给服务层

Currently I am handling it in this way:

... controllerMethod(@RequestParam String mandatoryParam, ...)

and, then passing this param to service layer by calling it's method

推荐答案

@ControllerAdvice("net.myproject.mypackage")
public class MyControllerAdvice {

    @ModelAttribute
    public void myMethod(@RequestParam String mandatoryParam) {

        // Use your mandatoryParam
    }
}

对net.myproject.mypackage程序包中对任何控制器的每个请求，都会调用

myMethod(). (在Spring 4.0之前，您无法定义程序包.@ControllerAdvice应用于所有控制器.)

myMethod() will be called for every request to any controller in the net.myproject.mypackage package. (Before Spring 4.0, you could not define a package. @ControllerAdvice applied to all controllers).

请参见

See the Spring Reference for more details on @ModelAttribute methods.

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