使用JNative,在Java中传递一个C/C++结构参数到动态库中

 1struct TestStruct {
 2     int a;
 3     int b;
 4};
 5
 6extern "C" __declspec(dllexport) TestStruct* ShowStruct(TestStruct* testStruct)
 7{
 8   cout << "在动态库中打印：传入动态库中的结构成员a的值为:" << testStruct->a << endl;
 9
10   //改变传入结构成员a的值为100
11   testStruct->a = 100;
12   return testStruct;
13}

1JNative nm = new JNative("D:\\vcprj\\testDll\\callDll\\Sample.dll", "ShowStruct", false);
2nm.setRetVal(Type.PSTRUCT);
3Pointer pTestStruct = new Pointer(new HeapMemoryBlock(4 + 4));
4pTestStruct.setIntAt(0, 50);
5nm.setParameter(0, pTestStruct);
6nm.invoke();
7System.out.println("Java调用动态库后打印结构成员 a 的值为：" + pTestStruct.getAsInt(0));
8nm.dispose();
9pTestStruct.dispose();