Spring EL变量列表？ [英] List of Spring EL Variables?

问题描述

Spring EL支持一些预定义变量

Spring EL supports a some predefined variables

• {#systemProperties。 ...}


• {#systemEnvironment。 ...}


• {＃request。 ...}


• {#session。 ...}

• {#systemProperties. ... }
• {#systemEnvironment. ... }
• {#request. ...}
• {#session. ...}

前两个记录在 Spring参考：第6章Spring表达语言（SpEL）。
其他两个在Spring Reference中没有提到（或者我没有找到它们。）（我发现它们在幻灯片，以及它在 spring social 和问题）。

The first two once are documented in the Spring Reference: chapter 6. Spring Expression Language (SpEL). The two others are not mentioned in the Spring Reference (or I did not found them.) (I found them in this slides, as well as its usage in spring social and this question).

所以我的问题是：是否有一个或多或少完整的预定义spring-el变量列表？

我想这些预定义变量中的一些不是由spring core本身定义的，而是通过激活某些模块（如spring-mvc）来定义的。所以我对一个或多或少常见的spring + jpa + mvc +安全应用程序

I guess that some of this predefined variables are not defined by spring core itself, but by "activating" of some modules like spring-mvc. So I am interested in the the variables that are available in a more or less common spring + jpa + mvc + security application.

推荐答案

我无法回答你的根问题，但我可能会给你一个提示。

I can not answer your root question but I may give you a hint.

在你的应用程序启动时注册了一些预定义的bean上下文但取决于您使用的上下文类型。

There are some predefined beans registered at start up of your application context but which depends on the context type you are using.

通常， systemProperties 和 systemEnvironment 存在。在Web应用程序中加载Spring，您还将获得 servletContext ， contextParameters 和 contextAttributes 。我假设， request 和 session 也与Web应用程序上下文相关。

Commonly, systemProperties and systemEnvironment are present. Loading Spring within a web application, you will also get servletContext, contextParameters and contextAttributes. I assume, request and session are related to a web application context as well.

我在调试使用Spring 3.0.6RELEASE的应用程序时发现了这一点。一个很好的起点是SpringBeanELResolver.getValue（）方法。

I discovered this during debugging of my application which uses Spring 3.0.6RELEASE. A good starting point is SpringBeanELResolver.getValue() method.

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