注册表检查路径/键是否存在 [英] Registry checking if path/key exists

问题描述

嘿伙计们，问个愚蠢的问题...

Hei guys, quick stupid question...

我得到了这个代码:

String arch = System.getenv("PROCESSOR_ARCHITECTURE");
String wow64Arch = System.getenv("PROCESSOR_ARCHITEW6432");
String realArch = arch.endsWith("64") || wow64Arch != null && wow64Arch.endsWith("64") ? "64" : "32";
String setWin = ((realArch.contains("64")) ? "SOFTWARE\\Wow6432Node\\path" : "SOFTWARE\\path");
String check = Advapi32Util.registryGetStringValue (HKEY_LOCAL_MACHINE, setWin, "InstallDir");

哪个字符串是已安装应用程序的路径，但如果注册表不存在，我的程序将停止.我如何检查注册表是否存在以及是否不绕过它?

Which strings a path to a installed application, but if the registry doesn't exists my program stops. How i can check if the registry exists and if doesn't bypass it?

并添加 system.err.println("Application not installed."); 如果密钥不存在.

and also to add system.err.println("Application not installed."); if the key doesn't exists.

PS:该程序是一个 GUI，所以即使密钥丢失我也想显示它.

PS: The program is a GUI so i want to show it even if the key is missing.

谢谢！

推荐答案

谢谢山姆.我确实找到了一些东西，不确定它是否会在某一时刻失败......

Thank you, Sam. I did found something, not sure if it will fail at one point ...

public void checkInstalled(){
    try {
        String regValue = null;
            regValue = WinRegistry.valueForKey(WinRegistry.HKEY_LOCAL_MACHINE, setWin, "InstallDir");
        if(regValue == null){
            System.err.println("Application not installed!");
        } else {
            "do the other thing"
            }
        } catch (IllegalArgumentException | IllegalAccessException | InvocationTargetException | IOException ex) {
        System.err.println(ex);
        }
    }

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