jstring str2jstring(JNIEnv* env,
const
char
* pat)
{
//定义java String类 strClass
jclass strClass = (env)->FindClass(
"Ljava/lang/String;"
);
//获取String(byte[],String)的构造器,用于将本地byte[]数组转换为一个新String
jmethodID ctorID = (env)->GetMethodID(strClass,
"<init>"
,
"([BLjava/lang/String;)V"
);
//建立byte数组
jbyteArray bytes = (env)->NewByteArray(strlen(pat));
//将char* 转换为byte数组
(env)->SetByteArrayRegion(bytes,
0
, strlen(pat), (jbyte*)pat);
// 设置String, 保存语言类型,用于byte数组转换至String时的参数
jstring encoding = (env)->NewStringUTF(
"GB2312"
);
//将byte数组转换为java String,并输出
return
(jstring)(env)->NewObject(strClass, ctorID, bytes, encoding);
}
std::string jstring2str(JNIEnv* env, jstring jstr)
{
char
* rtn = NULL;
jclass clsstring = env->FindClass(
"java/lang/String"
);
jstring strencode = env->NewStringUTF(
"GB2312"
);
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
);
std::string stemp(rtn);
free(rtn);
return
stemp;
}
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