在Windows中使用Java查找特定的注册表项 [英] Finding a specific registry key using java in windows

问题描述

我可以在Windows中转到regedit，然后转到edit-> find并键入要在计算机上找到的密钥(在我的情况下为Maxima)，然后找到所需的密钥(为maxima)(在我的情况下为在"HKEY_LOCAL_MACHINE \ SOFTWARE \ Wow6432Node \ Microsoft \ Windows \ CurrentVersion \ Uninstall \ Maxima-5.17.1_is1"中) 但我需要在Java中动态执行此操作，并在Windows中找到已安装的maxima的当前版本及其目录位置.我不知道如何进行.

I can go to regedit in windows then go to edit->find and type in the key I want to find in my computer (in my case Maxima) and locate the required key (of maxima) (in my case it is in "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Maxima-5.17.1_is1") but I need to do this dynamically in java and find the current version of maxima installed and its directory location in windows. I have no idea how to proceed.

我尝试使用此处所述的方法:读取/写入Windows注册表使用Java ，但是要使用这些方法，我需要知道密钥.如何在Java中动态查找密钥?还是有其他方法可以使用Java在Windows中查找软件的版本和目录位置?

I tried to use the methods stated here: read/write to Windows Registry using Java, but to use these methods I need to know the key. How can I find the key dynamically in java? Or is there any other ways to find the version and directory location of a software in windows using java?

推荐答案

我将使用此类作为您的答案.因为它是用纯Java代码编写的.

I will use this class for your answer. Because it is written in pure java code.

1. 在此处中具有WinRegistry类.
2. 获取父键中所有键的列表.
3. 过滤列表以获取最合适的密钥(或精确密钥).
4. 然后您可以在此键中检查所需的值.

1. Have a WinRegistry class from here.
2. Get a list of all keys in parent key.
3. filter list to get the most appropriate key (Or exact key).
4. Then you can check the value you want in this key.

以下代码可为您提供帮助:

Here is the code to help you :

List<String> ls = WinRegistry.readStringSubKeys(WinRegistry.HKEY_LOCAL_MACHINE,
    "SOFTWARE\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\");
String key = ls.stream().filter(st -> st.matches("Maxima.*")).findAny().get();

现在，此key值将为Maxima-5.17.1_is1(如果存在，否则将引发java.util.NoSuchElementException).而且，您可以使用它来获取任何值.

Now this key value will be Maxima-5.17.1_is1 (if present otherwise java.util.NoSuchElementException will be thrown). And you can use it to get any Value.

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