java程序通过JNI打开ie

最近因为工作需要，要在java应用程序中打开一个网站,方法有多种，如通过Runtime.getRuntime().exec(""),但是这种方法关不掉session。
最后选择通过JNI来打开一个IE，ie在装载网页的办法，这种方法可以关掉session,下面我把代码贴出来，以供参考
struct EnumParam
{
HWND hMainWnd;
DWORD dwProcessID;
};
// 唯一的一个 CcjniApp 对象

CCjniApp theApp;
//HINSTANCE m_handle;
CString getIEpath();
//查找窗口句柄
BOOL CALLBACK EnumWinProc(HWND hwnd, LPARAM lParam)
{
DWORD dwID;

EnumParam* pep = (EnumParam*)lParam;
if (!(GetWindowLong(hwnd,GWL_STYLE) & WS_VISIBLE))
{
return TRUE;
}
GetWindowThreadProcessId(hwnd, &dwID);
if (dwID == pep->dwProcessID) {
pep->hMainWnd = hwnd;
return 0;
}
return TRUE;
}
DWORD myProcessID = 0;
HANDLE myProcessHandle;
JNIEXPORT jstring JNICALL Java_coc_jni_JniEx_showIE(JNIEnv *env, jobject obj,jstring str)
{

EnumParam ep;
STARTUPINFO si;
PROCESS_INFORMATION pi;

ep.hMainWnd = NULL;
memset(&si, 0, sizeof(si));
si.cb = sizeof(STARTUPINFO);

jboolean isCopy=FALSE;

jsize len = (*env).GetStringLength(str);
const jchar *commandstr = (*env).GetStringChars(str,&isCopy);
const jchar *wndClassStr = NULL;
CString str1 = CString(commandstr);

(*env).ReleaseStringChars(str, commandstr);
if(str1.Find("close")!=-1)
{
::TerminateProcess(myProcessHandle,0);
myProcessID = 0;
myProcessHandle =NULL;
return NULL;
}
//strcpy((LPTSTR)&str1,(LPCTSTR)commandstr);
//int size = 0;
//size = WideCharToMultiByte( CP_ACP, 0, (LPCWSTR)commandstr, len, commandcstr,(len*2+1), NULL, NULL );

CString m_strPath = getIEpath();
CString path = m_strPath+" "+str1;

DWORD dwTick;
bool bCreateProcssFlag = true;
if(myProcessID!=0)
{
dwTick = GetTickCount();
ep.dwProcessID = myProcessID;
////查找窗口句柄
while(!ep.hMainWnd && GetTickCount()-dwTick<2000)
{
EnumWindows((WNDENUMPROC)EnumWinProc,
(long)&ep);
if(ep.hMainWnd==NULL)
Sleep(1000);
}
if(ep.hMainWnd!=NULL)
bCreateProcssFlag = false;
}

if (bCreateProcssFlag&&CreateProcess(NULL,path.GetBuffer(path.GetLength()),
NULL,NULL,FALSE,0,NULL,NULL,&si,&pi))
{
ep.dwProcessID = pi.dwProcessId;
myProcessID = pi.dwProcessId;
myProcessHandle = pi.hProcess;
dwTick = GetTickCount();
while(!ep.hMainWnd && GetTickCount()-dwTick<2000)
{
EnumWindows((WNDENUMPROC)EnumWinProc,
(long)&ep);
if(ep.hMainWnd==NULL)
Sleep(1000);
}
}

HWND hParent = ep.hMainWnd;
::ShowWindow(hParent,SW_RESTORE);

::SendMessage(hParent,WM_SHOWWINDOW,0,0);
::SetForegroundWindow(hParent);



return NULL;
}
//取得IE路径
CString getIEpath(){

HKEY hKEY;//定义有关的hKEY,在查询结束时要关闭

//打开与路径 data_Set相关的hKEY
LPCTSTR data_Set="SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths\\iexplore.exe";
CString m_strPath;
//访问注册表，hKEY则保存此函数所打开的键的句柄
long ret0=(::RegOpenKeyEx(HKEY_LOCAL_MACHINE,data_Set,0,KEY_READ,&hKEY));
if(ret0!=ERROR_SUCCESS)//如果无法打开hKEY,则中止程序的执行
{
AfxMessageBox("error, can't open key!");
return "";
}

//查询有关的数据
LPBYTE path_Get=new BYTE[80];
DWORD type_1=REG_SZ;//定义数据类型
DWORD cbData_1=80;//定义数据长度

long ret1=::RegQueryValueEx(hKEY,"",NULL,&type_1,path_Get,&cbData_1);
if(ret1!=ERROR_SUCCESS)
{
AfxMessageBox("error, don't query key information!");
return "";
}

//显示信息
m_strPath=CString(path_Get);
delete[] path_Get;

//程序结束，关闭打开的hKEY
::RegCloseKey(hKEY);
return m_strPath;

}