lua GBK与utf8互转

最新推荐文章于 2025-07-12 14:32:59 发布

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最新推荐文章于 2025-07-12 14:32:59 发布

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CC 4.0 BY-SA版权

分类专栏： lua

本文链接：https://blog.youkuaiyun.com/u014206831/article/details/88173316

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该博客介绍了如何在Lua中进行GBK与UTF8编码的转换，以及在Android环境下利用Java的JNI接口实现同样的转换操作。主要函数包括Helper.utf8ToGBK和Helper.gbkToUTF8，以及对应的Java方法AppUtils.gbkToUTF8和AppUtils.utf8ToGBK。

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function Helper.utf8ToGBK(str)

if true then
return str
end

if device.platform == "android" then
return AppUtils:utf8ToGBK(str)
else
local convertStr = str
local togbk = iconv.new("GB2312", "UTF-8")
if togbk then
convertStr = togbk:iconv(str)
end
return convertStr
end
end

function Helper.gbkToUTF8(str)

if true then
return str
end

local convertStr = str
local toutf8 = iconv.new("UTF-8", "GB2312")
if toutf8 then
convertStr = toutf8:iconv(str)
end
return convertStr
end

string AppUtils::gbkToUTF8(const string& str)
{
   string convertStr = str;

   JniMethodInfo t;
   if (JniHelper::getMethodInfo(t, "java/lang/String", "getBytes", "(Ljava/lang/String;)[B")) {
           jstring jstr = t.env->NewStringUTF(str.c_str());
           jstring jcode = t.env->NewStringUTF("UTF-8");
   jbyteArray jarr = (jbyteArray)t.env->CallObjectMethod(jstr, t.methodID, jcode);
   jsize len = t.env->GetArrayLength(jarr);
   jbyte* pByte = t.env->GetByteArrayElements(jarr, JNI_FALSE);

   char * pBuffer = new char[len + 1];
   memcpy(pBuffer, pByte, len);
   pBuffer[len] = 0;

   convertStr = string(pBuffer);

   delete[] pBuffer;
   t.env->DeleteLocalRef(jstr);
   t.env->DeleteLocalRef(jcode);
   t.env->DeleteLocalRef(t.classID);
   }

   return convertStr;
}

string AppUtils::utf8ToGBK(const string& str)
{
   string convertStr = str;

   JniMethodInfo t;
   if (JniHelper::getMethodInfo(t, "java/lang/String", "getBytes", "(Ljava/lang/String;)[B")) {
           jstring jstr = t.env->NewStringUTF(str.c_str());
           jstring jcode = t.env->NewStringUTF("GB2312");
   jbyteArray jarr = (jbyteArray)t.env->CallObjectMethod(jstr, t.methodID, jcode);
   jsize len = t.env->GetArrayLength(jarr);
   jbyte* pByte = t.env->GetByteArrayElements(jarr, JNI_FALSE);

   char * pBuffer = new char[len + 1];
   memcpy(pBuffer, pByte, len);
   pBuffer[len] = 0;

   convertStr = string(pBuffer);

   delete[] pBuffer;
   t.env->DeleteLocalRef(jstr);
   t.env->DeleteLocalRef(jcode);
   t.env->DeleteLocalRef(t.classID);
   }

   return convertStr;
}