我不确定是什么导致了你的问题,但这对我来说效果很好:
byte[] windowText = new byte[512];
User32.INSTANCE.GetWindowTextA(hWnd, windowText, 512);
String wText = Native.toString(windowText).trim();
Edit
您应该以不同的方式获取编辑文本,通过
User32.SendMessageA(editHwnd, User32.WM_GETTEXT, paramWPARAM, lParamStr);
e.g.,
import com.sun.jna.Native;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.platform.win32.WinDef.LPARAM;
import com.sun.jna.platform.win32.WinDef.LRESULT;
import com.sun.jna.platform.win32.WinDef.WPARAM;
import com.sun.jna.win32.StdCallLibrary;
public class GetTextInNotePad {
public static final String NOTEPAD_CLASS = "Notepad";
public static final String EDIT_CLASS = "Edit";
interface User32 extends StdCallLibrary {
User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class);
int WM_SETTEXT = 0x000c;
int WM_GETTEXT = 0x000D;
HWND FindWindowA(String lpClassName, String lpWindowName);
HWND FindWindowExA(HWND hwndParent, HWND hwndChildAfter, String lpClassName,
String lpWindowName);
LRESULT SendMessageA(HWND paramHWND, int paramInt, WPARAM paramWPARAM, LPARAM paramLPARAM);
LRESULT SendMessageA(HWND editHwnd, int wmGettext, long l, byte[] lParamStr);
int GetClassNameA(HWND hWnd, byte[] lpString, int maxCount);
}
public static void main(String[] args) {
User32 user32 = User32.INSTANCE;
String lpClassName = "Notepad";
HWND notePadHwnd = user32.FindWindowA(lpClassName , null);
HWND editHwnd = user32.FindWindowExA(notePadHwnd, null, EDIT_CLASS, null);
byte[] lParamStr = new byte[512];
LRESULT resultBool = user32.SendMessageA(editHwnd, User32.WM_GETTEXT, 512, lParamStr);
System.out.println("lParamStr: " + Native.toString(lParamStr));
}
}