JNI中文处理问题小结 - 编程入门网
作者 佚名技术
来源 NET编程
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发布时间 2012-06-24
mString = mUtfChars;
return *this;
}
// Supply operator methods for converting the UTFString to a string
// or char*, making it easy to pass UTFString arguments to functions
// that require string or char* parameters.
string & GetString() { return mString; }
operator string() { return mString; }
operator const char* () { return mString.c_str (); }
operator jstring() { return mJstr; }
private:
JNIEnv* mEnv; // The enviroment pointer for this native method.
jstring mJstr; // A copy of the jstring object that this UTFString represents
char* mUtfChars; // Pointer to the data returned by GetStringUTFChars
string mString; // string buffer for holding the "value" of this instance
};我将它改了改：class JNIString {
private:
JNIString (); // Default ctor - disallowed
public:
// Create a new instance from the specified jstring
JNIString(JNIEnv* env, const jstring& str) :
mEnv (env) {
const jchar* w_buffer = env->GetStringChars (str, 0);
mJstr = env->NewString (w_buffer,
wcslen (w_buffer)); // Deep Copy, in usual case we only need
// Shallow Copy as we just need this class to
// provide some convenience for handling jstring
mChars = new char[wcslen (w_buffer) * 2 + 1];
WideCharToMultiByte (CP_ACP, 0, w_buffer, wcslen (w_buffer) + 1, mChars, wcslen (w_buffer) * 2 + 1,
NULL, NULL);
env->ReleaseStringChars (str, w_buffer);
mString = mChars;
}
// Create a new instance from the specified string
JNIString(JNIEnv* env, const string& str) :
mEnv (env) {
int slen = str.length ();
jchar* buffer = new jchar[slen];
int len = MultiByteToWideChar (CP_ACP, 0, str.c_str (), str.length (), buffer, slen);
if (len > 0 && len < slen)
buffer[len] = 0;
mJstr = env->NewString (buffer, len);
delete [] buffer;
mChars = new char[str.length () + 1];
strcpy (mChars, str.c_str ());
mString.empty ();
mString = str.c_str ();
}
// Create a new instance as a copy of the specified JNIString
JNIString(const JNIString& rhs) :
mEnv (rhs.mEnv) {
const jchar* wstr = mEnv->GetStringChars (rhs.mJstr, 0);
mJstr = mEnv->NewString (wstr, wcslen (wstr));
mEnv->ReleaseStringChars (rhs.mJstr, wstr);
mChars = new char[strlen (rhs.mChars) + 1];
strcpy (mChars, rhs.mChars);
mString = rhs.mString.c_str ();
}
// Delete the instance and release allocated storage
~JNIString() { delete [] mChars; }
// assign a new value to this instance from the given string
JNIString & operator =(const string& rhs) {
delete [] mChars;
int slen = rhs.length ();
jchar* buffer = new jchar[slen];
i |
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