用到的类：CEZCompressor、CEZDecompressor、MEZBufferManager、CEZZStream和CBufFlat。

//压缩
CBufFlat* Compress(const TDesC8& aData)
{
CBufFlat* nOutBuf = CBufFlat::NewL(128);
CBufferManager* nBufferManager = CBufferManager::NewLC(aData,*nOutBuf, 128);
CEZCompressor* compressor = CEZCompressor::NewLC(*nBufferManager, CEZCompressor::EBestCompression);

while (compressor->DeflateL())
{// loop here until the file is compressed
}
CleanupStack::PopAndDestroy(2); //compressor,nBufferManager
nOutBuf->Compress();

return nOutBuf;
} //解压缩
CBufFlat* DeCompress(const TDesC8& aData)
{
CBufFlat* nOutBuf = CBufFlat::NewL(128);
CBufferManager *nBufferManager = CBufferManager::NewLC(aData,*nOutBuf,128);
CEZDecompressor *decompressor = CEZDecompressor::NewLC(*nBufferManager);
while (decompressor->InflateL())
{// loop here until the file is decompressed
}
CleanupStack::PopAndDestroy(2); //decompressor,bufManager

return nOutBuf;
}

其中“CBufferManager”继承自“MEZBufferManager”，该类的源代码如下：

#ifndef __BUFFERMANAGER_H__ #define __BUFFERMANAGER_H__ #include <EZCompressor.h> #include <EZDecompressor.h> #include <EZlib.h> class CBufferManager : public CBase, public MEZBufferManager { public: static CBufferManager* NewLC(const TDesC8& aInput, CBufFlat& aOutput, TInt aBufferSize = 64); static CBufferManager* NewL(const TDesC8& aInput, CBufFlat& aOutput, TInt aBufferSize = 64); ~CBufferManager(); private: CBufferManager(CBufFlat& aOutput); void ConstructL(const TDesC8& aInput, TInt aBufferSize); public: //from MEZBufferManager void InitializeL(CEZZStream &aZStream); void NeedInputL(CEZZStream &aZStream); void NeedOutputL(CEZZStream &aZStream); void FinalizeL(CEZZStream &aZStream); private: HBufC8* iInput; CBufFlat& iOutput; TInt iBufferSize; TUint8* iInputBuffer; TUint8* iOutputBuffer; TPtr8 iInputDescriptor; // always points to start of the input Buffer TPtr8 iOutputDescriptor; // always points to start of the output Buffer }; #endif //__BUFFERMANAGER_H__ #include "BufferManager.h" CEZZStream::CEZZStream() :iOutputPointer(NULL), iOutputBufferLength(0) { } CBufferManager* CBufferManager::NewL(const TDesC8& aInput, CBufFlat& aOutput, TInt aBufferSize) { CBufferManager* self = CBufferManager::NewLC(aInput, aOutput, aBufferSize); CleanupStack::Pop(); return self; } CBufferManager* CBufferManager::NewLC(const TDesC8& aInput, CBufFlat& aOutput, TInt aBufferSize) { CBufferManager* self = new (ELeave) CBufferManager(aOutput); CleanupStack::PushL(self); self->ConstructL(aInput, aBufferSize); return self; } void CBufferManager::ConstructL(const TDesC8& aInput, TInt aBufferSize) { if(aBufferSize <= 0) {    User::Leave(KErrArgument); } iBufferSize = aBufferSize; iInputBuffer = new (ELeave) TUint8[iBufferSize]; iOutputBuffer = new (ELeave) TUint8[iBufferSize]; iInputDescriptor.Set(iInputBuffer, 0, iBufferSize); iOutputDescriptor.Set(iOutputBuffer, 0, iBufferSize); iInput = HBufC8::NewL(aInput.Length()); *iInput = aInput; } CBufferManager::~CBufferManager() { delete [] iInputBuffer; delete [] iOutputBuffer; delete iInput; } CBufferManager::CBufferManager(CBufFlat& aOutput) :iOutput(aOutput), iInput(NULL), iInputDescriptor(NULL,0), iOutputDescriptor(NULL,0) { } void CBufferManager::InitializeL(CEZZStream& aZStream) { NeedInputL(aZStream); aZStream.SetOutput(iOutputDescriptor); } void CBufferManager::NeedInputL(CEZZStream& aZStream) { TInt length = (iBufferSize > iInput->Length()) ? iInput->Length() : iBufferSize; iInputDescriptor.Copy((TUint8*)iInput->Des().Ptr(), length); iInput->Des().Delete(0, length); aZStream.SetInput(iInputDescriptor); } void CBufferManager::NeedOutputL(CEZZStream& aZStream) { TPtrC8 od = aZStream.OutputDescriptor(); iOutput.InsertL(iOutput.Size(), od); aZStream.SetOutput(iOutputDescriptor); } void CBufferManager::FinalizeL(CEZZStream& aZStream) { TPtrC8 od = aZStream.OutputDescriptor(); iOutput.InsertL(iOutput.Size(), od); }