C调java获取进程已有的虚拟机

一个进程只允许创建一个虚拟机，而java虚拟机的退出机制有事非强制性的。所以创建失败，后去尝试获取本进程已有虚拟机。

JavaVM *jvm;
JavaEnv *env;
JavaVMOption option[3];
option[0].optionString = "-Djava.complier=NONE";
option[1].optionString = "-Djava.class.path=./:.my.jar";
option[2].optionString = "-Djava.library.path=/my/path";
vm_args.version = JNI_VERSION_1_8;
vm_args.ignoreUnrecognized = JNI_TRUE;
vm_args.nOption = 3;
vm_args.options = options;
long Status = JNI_CreateJavaVM( &jvm, (void**)&env, &VM_args );
if( status < 0 || status == JNI_ERR ){
	jint count = 0;
	jint result = JNI_GetCreatedJavaVMs( &jvm,sizeof(JavaVM)*10, &count );
	if( result != JNI_OK ){
		printf("获取jvm失败n");
		return -1;
	}
	jint result1 = (*jvm)->GetEnv( jvm, (void**)&env, JNI_VERSION_1_8 );
	if( result1 != JNI_OK ){
		printf("获取env失败n");
		return -1;
	}
	jint2 result2 = (*env)->GetJavaVM( env, &jvm );
	if( result2 != JNI_OK ){
		printf("获取虚拟机失败n");
		return -1;
	}
}