C++通过JNI调用jar包CallStaticObjectMethod返回为空

ziyunyingzb

于 2018-01-28 17:07:55 发布

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本文链接：https://blog.youkuaiyun.com/ziyunyingzb/article/details/79187849

在C++中通过JNI调用Java类`com/asiainfo/openplatform/common/util/RSAUtils`的静态方法`encryptByPublicKey`时，返回结果为空。已确认`MD5Util`的静态方法`MD5`调用正常。问题可能出在`RSAUtils`的类加载、方法ID获取或参数传递上。

JavaVMInitArgs vm_args;
JavaVMOption options[3];
JavaVM* jvm = NULL;
JNIEnv* env = NULL;

RtlZeroMemory(&vm_args, sizeof(JavaVMInitArgs));
options[0].optionString = "-Djava.compiler=NONE";
options[1].optionString = "-Djava.class.path=.;E:\\encrypt_sdk.jar;E:\\bcprov-jdk16-143.jar";
options[2].optionString = "-verbose:NONE";

vm_args.version = JNI_VERSION_1_4;
vm_args.nOptions = 3;
vm_args.options = options;
vm_args.ignoreUnrecognized = JNI_TRUE;