如何在Spring中将对象添加到应用程序范围 [英] How to add an object to application scope in Spring

问题描述

我们可以在Spring中使用Model或ModelAndView对象设置请求属性.

We can set the request attributes using Model or ModelAndView object in Spring.

我们可以使用@SessionAttributes将属性保留在会话范围内.

We can use @SessionAttributes to keep attributes in session scope.

然后我如何在Spring的application范围内放置属性，spring是否为此提供了任何注释?

Then how can I put an attribute in application scope in Spring, does spring has provided any annotation for that?

推荐答案

基本上，配置应用程序作用域所需的全部是使用ServletContext，您可以在Spring中按如下方式进行操作:

Basically all that is needed to configure an application scope is to use the ServletContext, and you can do it in Spring as follows:

public class MyBean implements ServletContextAware {

    private ServletContext servletContext;

    public void setServletContext(ServletContext servletContext) {
        this.servletContext = servletContext;
    }

}

javax.servlet.ServletContext甚至可以按如下方式注入到您的bean实现中:

javax.servlet.ServletContext could be even injected to your bean implementation as follows:

@Component
public class MyBean {

    @Autowired
    private ServletContext servletContext;

    public void myMethod1() {
        servletContext.setAttribute("attr_key","attr_value");
    }

    public void myMethod2() {
        Object value = servletContext.getAttribute("attr_key");
        ...
    }

}

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