小編典典

減輕您的痛苦，并使用JNA。您將需要下載

Win32 API的 jna.jar 和 jna -platform.jar

。該PInvoke的

wiki和MSDN是找到合適的系統調用是有用的。

無論如何，這是用于打印當前活動窗口的標題和過程的代碼。

import static enumeration.EnumerateWindows.Kernel32.*;

import static enumeration.EnumerateWindows.Psapi.*;

import static enumeration.EnumerateWindows.User32DLL.*;

import com.sun.jna.Native;

import com.sun.jna.Pointer;

import com.sun.jna.platform.win32.WinDef.HWND;

import com.sun.jna.ptr.PointerByReference;

public class EnumerateWindows {

private static final int MAX_TITLE_LENGTH = 1024;

public static void main(String[] args) throws Exception {

char[] buffer = new char[MAX_TITLE_LENGTH * 2];

GetWindowTextW(GetForegroundWindow(), buffer, MAX_TITLE_LENGTH);

System.out.println("Active window title: " + Native.toString(buffer));

PointerByReference pointer = new PointerByReference();

GetWindowThreadProcessId(GetForegroundWindow(), pointer);

Pointer process = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, false, pointer.getValue());

GetModuleBaseNameW(process, null, buffer, MAX_TITLE_LENGTH);

System.out.println("Active window process: " + Native.toString(buffer));

}

static class Psapi {

static { Native.register("psapi"); }

public static native int GetModuleBaseNameW(Pointer hProcess, Pointer hmodule, char[] lpBaseName, int size);

}

static class Kernel32 {

static { Native.register("kernel32"); }

public static int PROCESS_QUERY_INFORMATION = 0x0400;

public static int PROCESS_VM_READ = 0x0010;

public static native int GetLastError();

public static native Pointer OpenProcess(int dwDesiredAccess, boolean bInheritHandle, Pointer pointer);

}

static class User32DLL {

static { Native.register("user32"); }

public static native int GetWindowThreadProcessId(HWND hWnd, PointerByReference pref);

public static native HWND GetForegroundWindow();

public static native int GetWindowTextW(HWND hWnd, char[] lpString, int nMaxCount);

}

}

2020-09-08

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