- #include <malloc.h>
- #include <string.h>
- #include <stdlib.h>
- #include <vcclr.h>
- using namespace System;
- using namespace System::Text;
- // jstring To String
- String^ jstringToStr(JNIEnv* env, jstring jstr)
- {
- char* str = jstringTostring(env, jstr);
- String^ value = gcnew String(str);
- free(str);
- return value;
- }
- // jstring To char*
- char* jstringTostring(JNIEnv* env, jstring jstr)
- {
- char* rtn = NULL;
- jclass clsstring = env->FindClass("java/lang/String");
- jstring strencode = env->NewStringUTF("utf-8");
- jmethodID mid = env->GetMethodID(clsstring, "getBytes", "(Ljava/lang/String;)[B");
- jbyteArray barr = (jbyteArray)env->CallObjectMethod(jstr, mid, strencode);
- jsize alen = env->GetArrayLength(barr);
- jbyte* ba = env->GetByteArrayElements(barr, JNI_FALSE);
- if (alen > 0)
- {
- rtn = (char*)malloc(alen + 1);
- memcpy(rtn, ba, alen);
- rtn[alen] = 0;
- }
- env->ReleaseByteArrayElements(barr, ba, 0);
- return rtn;
- }
- // String To jstring
- jstring strTojstring(JNIEnv* env, String^ rtn)
- {
- pin_ptr<const wchar_t> wch = PtrToStringChars(rtn);
- size_t convertedChars = 0;
- size_t sizeInBytes = ((rtn->Length + 1) * 2);
- char *ch = (char *)malloc(sizeInBytes);
- errno_t err = wcstombs_s(&convertedChars,
- ch, sizeInBytes,
- wch, sizeInBytes);
- jstring js = stringTojstring(env, ch);
- free(ch);
- return js;
- }
- // char* To jstring
- jstring stringTojstring(JNIEnv* env, const char* pat)
- {
- jclass strClass = env->FindClass("Ljava/lang/String;");
- jmethodID ctorID = env->GetMethodID(strClass, "<init>", "([BLjava/lang/String;)V");
- jbyteArray bytes = env->NewByteArray(strlen(pat));
- env->SetByteArrayRegion(bytes, 0, strlen(pat), (jbyte*)pat);
- jstring encoding = env->NewStringUTF("utf-8");
- return (jstring)env->NewObject(strClass, ctorID, bytes, encoding);
- }