如何使Model属性成为全局属性? [英] How to make a Model attribute global?

问题描述

我正在使用Spring MVC Framework，并且希望视图的所有.jsp页都可以访问用户的属性(姓名，性别，年龄...).到目前为止，我在每个Controller中使用Model(UI)的addAttribute方法将当前用户的属性传递给View.有没有办法只执行一次，并避免在每个Controller中都使用相同的代码?

I'm using Spring MVC Framework and I'd like all the .jsp pages of the View to have access to the User's attributes(name, sex, age...). So far, I use the addAttribute method of the Model(UI) in every Controller to pass the current User's attributes to the View. Is there a way to do this only once and avoid having the same code in every Controller?

推荐答案

您可以在新的Controller类上使用Spring的@ControllerAdvice批注，如下所示:

You can use Spring's @ControllerAdvice annotation on a new Controller class like this:

@ControllerAdvice
public class GlobalControllerAdvice {

    @ModelAttribute("user")
    public List<Exercice> populateUser() {
        User user = /* Get your user from service or security context or elsewhere */;
        return user;
    }
}

"populateUser"方法将在每个请求上执行，并且由于具有@ModelAttribute批注，因此该方法(用户)的结果将被放入每个请求的模型中.

The "populateUser" method will be executed on every request and since it has a @ModelAttribute annotation, the result of the method (the user) will be put into the model for every request.

将使用$ {user}在jsp中使用该用户，因为该名称是@ModelAttribute的名称(例如:@ModelAttribute("fooBar")-> $ {fooBar})

The user will be available in your jsp using ${user} since that was the name given to the @ModelAttribute (example: @ModelAttribute("fooBar") -> ${fooBar} )

您可以将一些参数传递给@ControllerAdvice批注，以指定此Global控制器建议使用哪些控制器.例如:

You can pass some arguments to the @ControllerAdvice annotation to specify which controllers are advised by this Global controller. For example:

@ControllerAdvice(assignableTypes=FooController.class,BarController.class})
or
@ControllerAdvice(basePackages="foo.bar.web.admin","foo.bar.web.management"}))

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