java - JNA 中 SHChangeNotify 的正确映射

Question

这是来自 MSDN 的 SHChangeNotify 函数的语法:

void SHChangeNotify(
  LONG wEventId,
  UINT uFlags,
  __in_opt  LPCVOID dwItem1,
  __in_opt  LPCVOID dwItem2
);

我必须在 Java Native Access [JNA] 中编写其 Java 对应部分，但此声明似乎是错误的:

public interface Shell32 extends com.sun.jna.platform.win32.Shell32 {

    public Shell32 INSTANCE = (Shell32) Native.loadLibrary(Shell32.class);

    void SHChangeNotify(long wEventId, int uFlags, Pointer dwItem1, Pointer dwItem2);

}

我遇到以下异常:

Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking up function 'SHChangeNotify'

知道如何正确书写吗？

Answer 1

不是从 com.sun.jna.platform.win32.Shell32 扩展 Shell32 接口(interface)，而是从 StdCallLibrary 扩展它

public interface Shell32 extends StdCallLibrary {
    final static Map<String, Object> WIN32API_OPTIONS = new HashMap<String, Object>() {
        private static final long serialVersionUID = 1L;
        {
            put(Library.OPTION_FUNCTION_MAPPER, W32APIFunctionMapper.UNICODE);
            put(Library.OPTION_TYPE_MAPPER, W32APITypeMapper.UNICODE);
        }
    };

    public Shell32 INSTANCE = (Shell32) Native.loadLibrary("Shell32", Shell32.class, WIN32API_OPTIONS);

    //whatever you want to expose here
}