不用第三方工具解压zip档案

来源：互联网发布：linux firefox 更新编辑：程序博客网时间：2024/09/21 09:22

下面的是KeSummer给我的问题的答案，其所说的方法和提供的代码经过验证时可行的，感谢KeSummer的指点。

原帖地址链接：http://topic.csdn.net/u/20090108/16/d5aebfec-b916-449e-ae88-02dd45388804.html#replyachor

原理：zipfldr.dll是个COM组件，但是尚未公开接口，但是我们可以打开一个隐藏的explorer窗口，然后把ZIP的内容悄悄地复制出来，这就相当于解压了。下面是代码，测试例子：UnZipFolder("d://aa.zip","c://解压文件夹");请确保c盘下解压文件夹存在。。。

bool UnZipFolder(LPCTSTR zipFile,LPCTSTR destination)
   {

    DWORD     strlen = 0;
    HRESULT     hResult;
    IShellDispatch *pISD;
    Folder *pToFolder = NULL;
    Folder *pFromFolder = NULL;
    FolderItems *pFolderItems = NULL;
    FolderItem *pItem = NULL;

    VARIANT   vDir, vFile, vOpt;
    BSTR strptr1, strptr2;
    CoInitialize(NULL);

    bool bReturn = false;

    hResult = CoCreateInstance(CLSID_Shell, NULL, CLSCTX_INPROC_SERVER,
     IID_IShellDispatch, (void **)&pISD);

    if(FAILED(hResult))
    {
     return bReturn;
    }

    VariantInit(&vOpt);
    vOpt.vt = VT_I4;
    vOpt.lVal = 16+4;     // Do not display a progress dialog box ~ This will not work properly!


    CString strZipFile(zipFile);
    CString strDestination(destination);
    strptr1 = strZipFile.AllocSysString();
    strptr2 = strDestination.AllocSysString();

    VariantInit(&vFile);
    vFile.vt = VT_BSTR;
    vFile.bstrVal = strptr1;
    hResult = pISD->NameSpace(vFile, &pFromFolder);

    VariantInit(&vDir);
    vDir.vt = VT_BSTR;
    vDir.bstrVal = strptr2;

    hResult = pISD->NameSpace(vDir, &pToFolder);

    if(S_OK == hResult)
    {
     hResult = pFromFolder->Items(&pFolderItems);
     if(SUCCEEDED(hResult))
     {
      long lCount = 0;
      pFolderItems->get_Count(&lCount);
      IDispatch* pDispatch = NULL;
      pFolderItems->QueryInterface(IID_IDispatch,(void**)&pDispatch);
      VARIANT vtDispatch;
      VariantInit(&vtDispatch);
      vtDispatch.vt = VT_DISPATCH;
      vtDispatch.pdispVal = pDispatch;

      //cout << "Extracting files .../n";
      hResult = pToFolder->CopyHere(vtDispatch,vOpt);
      if(hResult != S_OK) return false;

      //Cross check and wait until all files are zipped!
      FolderItems* pToFolderItems;
      hResult = pToFolder->Items(&pToFolderItems);

      if(S_OK == hResult)
      {
       long lCount2 = 0;

       hResult = pToFolderItems->get_Count(&lCount2);
       if(S_OK != hResult)
       {
        pFolderItems->Release();
        pToFolderItems->Release();
        SysFreeString(strptr1);
        SysFreeString(strptr2);
        pISD->Release();
        CoUninitialize();
        return false;
       }
       //Use this code in a loop if you want to cross-check the items unzipped.
       /*if(lCount2 != lCount)
       {
        pFolderItems->Release();
        pToFolderItems->Release();
        SysFreeString(strptr1);
        SysFreeString(strptr2);
        pISD->Release();
        CoUninitialize();
        return false;
       }*/

       bReturn = true;
      }

      pFolderItems->Release();
      pToFolderItems->Release();
     }

     pToFolder->Release();
     pFromFolder->Release();
    }

    //cout << "Over!/n";
    SysFreeString(strptr1);
    SysFreeString(strptr2);
    pISD->Release();

    CoUninitialize();
    return bReturn;
   }