学步园

 

为了实现 C++ 调用 Java的函数，以下方法可供参考。https://www.xingdaili.com/browse.php?u=RDFxE%2Bw3stMHuV6Q%2BLJWhbnh4Fb4JxGnYdxt1UkqyGFlfDtFncjT9tbFhUZUE6%2BW26h1OWzBt06FC4GH6pS4VY6iXDkrt6DXpPJosrmDOfQVVzgDl7rvjPaA6LZFYMTgWo73wlSBrNr4G7M%3D&b=6

Use JNI
Use Jace
Use JunC++ion
Use execl("java", "java", "-jar", "myprog.jar", NULL);
Use execlp("java", "java", "-jar", "myprog.jar", (char *)0);
Use system("java filename.jar");
Use popen("java -jar test.jar text1 text2", "r");
Use CreateProcess(...);
Use JNA

2 down vote favorite 1

I'm trying to call / execute a java jar from a C++ program. Here are the options I've found so far: Use JNI Use Jace Use JunC++ion Use execl("java", "java", "-jar", "myprog.jar", NULL); Use execlp("java", "java", "-jar", "myprog.jar", (char *)0); Use system("java filename.jar"); Use popen("java -jar test.jar text1 text2", "r"); Use CreateProcess(...); Use JNA I'd like to use JNI, however I'm running into problems. ======================== Hello.cpp I have a simple Hello.cpp class: #include <iostream> #include <jni.h> using namespace std; int main() { cout << "Hello World" << endl; // prints Hello World JavaVM *jvm; /* denotes a Java VM */ JNIEnv *env; /* pointer to native method interface */ JDK1_1InitArgs vm_args; /* JDK 1.1 VM initialization arguments */ vm_args.version = 0x00010001; /* New in 1.1.2: VM version */ /* Get the default initialization arguments and set the class * path */ JNI_GetDefaultJavaVMInitArgs(&vm_args); vm_args.classpath = "/home/FinishedJars/HelloWorld/hello2.jar"; /* load and initialize a Java VM, return a JNI interface * pointer in env */ JNI_CreateJavaVM(&jvm, &env, &vm_args); /* invoke the Main.test method using the JNI */ jclass cls = env->FindClass("Main"); jmethodID mid = env->GetStaticMethodID(cls, "test", "(I)V"); env->CallStaticVoidMethod(cls, mid, 100); /* We could have created an Object and called methods on it instead */ /* We are done. */ jvm->DestroyJavaVM(); return 0; } ======================== Compile And when I try to compile with something like: g++ -I /usr/lib/jvm/jdk1.6.0_34-x86/include/ Hello.cpp Note: I found "jni.h" in that folder, so I included it. I'm assuming that's the right spot, but I'm not certain I get a ton of errors ( see below )