关闭资源总是重要的吗? [英] Is closing the resources always important?
问题描述
很多时候我遇到过这样的说法，即应用程序应该始终明确关闭它打开的所有资源.
Many times I met the statement that the application should always explicitly close all the resources that it opened.
我的编程方法相当务实，我不喜欢盲目遵循任何我没有清楚看到好处的约定.因此我的问题.
My approach to programming is rather pragmatic and I don't like to blindly follow any convention that I don't clearly see benefits of. Hence my question.
假设:
- 我有一个小应用
- 它打开一些资源(例如文件、数据库连接、远程流)并对其进行处理
- 它工作几分钟然后退出
- 假设它是用 Java 编写的(如果语言相关)
我真的需要关心关闭我打开的所有资源吗?我猜我打开的所有资源都会在应用程序/虚拟机退出时关闭/释放.我说得对吗?
Do I really have to care about closing all the resources that I opened? I guess all the resources I opened will be closed/released when the application/virtual machine exits. Am I right?
如果这是真的，是否有任何令人信服的理由来关心在如此小的、短期工作的应用程序中关闭资源?
If that's true, are there any convincing reasons to care about closing resources in such small, short working application?
更新:
这个问题纯粹是假设性的，但关于不在乎的论点是我可能只是在编写一些快速脚本，不想编写任何与问题没有直接关系的不必要的代码手头的问题:关闭资源，做所有这些冗长的 try-catch-finally 事情，处理我不关心的异常等.
The question is purely hypothetical, but the argument for not caring about that is that I may be just hacking together some quick script and don't want to write any unnecessary code not directly related to the problem at hand: closing resources, doing all this verbose try-catch-finally stuff, handling exceptions that I don't care about etc.
问题的关键在于不这样做是否有任何实际后果.
The point of the question is whether there are any practical consequences of not doing it.
推荐答案
我猜我打开的所有资源都会在应用程序/虚拟机退出时关闭/释放.
I guess all the resources I opened will be closed/released when the application/Virtual machine exits.
未定期释放的资源会发生什么情况是您无法控制的.它可能不会造成伤害，也可能会造成一些伤害.它也高度依赖于平台，因此仅对一个平台进行测试无济于事.
What happens with a resource which was not regurarly released is out of your control. It may do no harm, or it may do some. It is also highly platform-dependent, so testing on just one won't help.
我为什么要在这么小的、短的工作应用程序中关闭这些资源?
why should I care about closing these resources in such small, short working application?
应用程序的大小应该无关紧要.首先，应用程序通常会增长；其次，如果你不练习以正确的方式去做，你就不会在重要的时候知道如何去做.
The size of the application shouldn't matter. First, applications usually grow; second, if you don't practice doing it the right way, you won't know how to do it when it matters.
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