java调用C++动态库，传参包括基础类型、指针类型、结构类型、结构指针类型的实际例子

package com.calldll.main; import com.calldll.vo.Char32msg; import com.calldll.vo.Rect; import com.calldll.vo.SerialNum; import com.calldll.vo.Staff; import com.sun.jna.*; import com.sun.jna.ptr.FloatByReference; import com.sun.jna.ptr.IntByReference; public class JavaDll { //简单回调接口 public static interface CustumPlus extends Callback { public abstract int callback(int a, int b); } //简单回调实现 public static class SimpleAdd implements CustumPlus{ public final int callback(int a, int b){ return a+b; } } //复杂回调接口 public static interface OnAssignSN extends Callback { public abstract int callback(SerialNum.ByReference pSN, int nCount); } //复杂回调接口实现 public static class DispLastSN implements OnAssignSN{ public final int callback(SerialNum.ByReference pSN, int nCount) { if(nCount <=0) return 0; System.out.println("回调显示:"); SerialNum.ByReference [] sns = (SerialNum.ByReference[])pSN.toArray(nCount); for(int i=0; i<nCount; i++){ System.out.println(sns[i].getMsg()); } return nCount; } } //包含复杂回调接口的结构 public static class AssignMethod extends Structure{ public String title; public OnAssignSN fp; public static class ByReference extends AssignMethod implements Structure.ByReference {}; } // public interface TestDll extends Library{ // TestDll INSTANCE = (TestDll)Native.loadLibrary("fft", TestDll.class); // void IntFcn(float[] acc, float[] t, // float sf, float flag, // Emx.ByReference emx, float[] velint, FFTOut[] fftout); // void test(); // } //动态库类 public interface DllInterface extends Library { DllInterface INSTANCE = (DllInterface)Native.load("DllTest", DllInterface.class); public void DispInfor(); public void DispMessage(String msg); public int Plus(int a, int b); public void LoadData(IntByReference n, FloatByReference f); // public void AssignSN(SerialNum.ByReference struct); public void AssignSN(SerialNum struct); public int RectangleArea(Rect.ByValue struct); public void Standardrize(Rect.ByReference struct); // public void Standardrize(Rect struct); public void EnlargeRect(Rect struct); public int MultiOperate(CustumPlus fp, int a, int b); public int ArrayInput(SerialNum[] strt, int a); public SerialNum ArrayOutput(IntByReference pcount); public void FreeArray(SerialNum[] pSN); public void CharArrayInput(Char32msg[] pChar32, int count); public void GetStaff(Staff.ByReference staff); public void FreeMemory(Pointer p); public int AssignSNWithCallBack(OnAssignSN disp); public int AppointAssignMethod(AssignMethod method); } public static void main(String[] args) { // TestDll.INSTANCE.test(); // StringBuffer sb = new StringBuffer(); // 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