Question

所以我有这个“Beep”功能，但是当我尝试任何一个namedpipe函数时它会返回：

线程“main”中的异常java.lang.UnsatisfiedLinkError：错误查找函数'WaitNamedPipe'：指定的过程不能被发现。

import java.nio.charset.StandardCharsets;

import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Pointer;



/**
 * @author  
 *
 */
public class NamedPipeNativeFunctions {

    /*
     * Public Declare Function CallNamedPipe Lib "kernel32" Alias
     * "CallNamedPipeA" (ByVal lpNamedPipeName As String, lpInBuffer As Any,
     * ByVal nInBufferSize As Long, lpOutBuffer As Any, ByVal nOutBufferSize As
     * Long, lpBytesRead As Long, ByVal nTimeOut As Long) As Long
     * 
     */
    public interface Kernel32 extends Library {
public long CallNamedPipe (String lpNamedPipeName,long  lpInBuffer ,long nInBufferSize, Pointer  lpOutBuffer,long nOutBufferSize, Pointer lpBytesRead, long  nTimeOut);
public boolean WaitNamedPipe(String lpNamedPipeName,
        int nTimeOut);
public boolean Beep(int FREQUENCY, int DURATION);
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        myClass myclass = new myClass () ; 
        myClass myclass2 = new myClass () ; 

        Pointer lpOutBuffer =  myclass.getPointer() ; 
        Pointer lpBytesRead  =myclass2.getPointer()  ; 

        Kernel32 lib = (Kernel32) Native.loadLibrary("kernel32", Kernel32.class);
        //lib.CallNamedPipe("1234TestPipe", 255, 255, lpOutBuffer , 255, lpBytesRead , 5000); 
        lib.Beep(698, 500); // works 
         boolean sucess =   lib.WaitNamedPipe("hgf" ,(int) 5000 ); // does not work 

    }

}

Answer 1

WaitNamedPipe是＃define，可以是WaitNamedPipeA或WaitNamedPipeW，具体取决于调用者是分别使用ANSII还是UNICODE。源（请参阅Unicode和ANSI名称部分）：https://msdn.microsoft.com/en-us/library/windows/desktop/aa365800(v=vs.85).aspx

Java JNA无法在Kernel32

1 个答案: