C++读写配置文件
` #include
#include <fstream>
#include <vector>
#include<string>
using namespace std;
class CConfigOperator
{
public :
` CConfigOperator(`void );
` ~CConfigOperator(`void );
` void`SetFilePath( const string &sFilePath);
` string GetFilePath();`
` bool`GetConfigValue( const string &sName, const string &skey,string &sValue,string &sError);
` bool`ModefyConfigValue( const string &sName, const string &skey, const string &sValue,string &sError);
private :
` bool`OpenFile();
` void`FindName();
` bool`FindKey();
` bool`WriteFile();
` bool`ModefyValue();
` void`WriteToFile(vector<string> &vContent);
` fstream m_fout;`
` ifstream m_fin;`
` string m_sFilePath;`
` string m_Name;`
` string m_Key;`
` string m_value;`
` string m_sError;`
` string m_sStr;`
` bool`m_bFindName;
};
#include "ConfigOperator.h"
CConfigOperator::CConfigOperator( void )
{
}
CConfigOperator::~CConfigOperator( void )
{
}
/************************************
` 设置配置文件路径`
************************************/
void CConfigOperator::SetFilePath( const string &sFilePath)
{
` m_sFilePath = sFilePath;`
}
/************************************
` 得到配置文件路径`
************************************/
string CConfigOperator::GetFilePath()
{
` return`this ->m_sFilePath;
}
/************************************
` 打开配置文件`
************************************/
bool CConfigOperator:: OpenFile()
{
` if`( true == m_fin.is_open())
` {`
` m_fin.close();`
` }`
` m_fin.open(m_sFilePath.c_str());`
` if`(NULL == m_fin)
` {`
` m_sError =`"can not open file " +m_sFilePath;
` return`false ;
` }`
` return`true ;
}
/************************************
` 查找配置文件的名字`
************************************/
void CConfigOperator::FindName()
{
` if`(-1 != m_sStr.find( '[' ))
` {`
` string sTemp = m_sStr.substr(m_sStr.find(`'[' ) + 1,m_sStr.find( ']' ) - m_sStr.find( '[' ) - 1);
` if`(0 == strcmp (sTemp.c_str(),m_Name.c_str()))
` {`
` m_bFindName =`true ;
` m_sError =`"Find Name But Not Find Key" ;
` }`
` else`
` {`
` m_bFindName =`false ;
` }`
` }`
}
/************************************
` 查找配置文件的Key`
************************************/
bool CConfigOperator::FindKey()
{
` int`iDelePlace = m_sStr.find( '//' );
` int`iFindEqual = m_sStr.find( '=' );
` //被注释的行，或者是包含key但是已经被注视掉了，过滤`
` if`( (- 1 != iDelePlace && iDelePlace < iFindEqual) || (- 1 != iDelePlace && -1 == iFindEqual) || -1 == iFindEqual )
` {`
` return`false ;
` }`
` string sKey = m_sStr.substr(0,m_sStr.find(`'=' ));
``
` if`(0 == strcmp (sKey.c_str(),m_Key.c_str()))
` {`
` m_value = m_sStr.substr(m_sStr.find(`'=' ) + 1 , m_sStr.length() - m_sStr.find( '=' ) - 1);
` return`true ;
` }`
``
` return`false ;
}
/************************************
` 读取配置文件NEMA KEY 对应的Value信息`
************************************/
bool CConfigOperator::GetConfigValue( const string &sName, const string &skey,string &sValue,string &sError)
{
` m_sError =`"" ;
` m_Name = sName;`
` m_Key = skey;`
` if`( false == OpenFile())
` {`
` sError = m_sError;`
` return`false ;
` }`
` char`str[1024];
` m_bFindName =`false ;
` while`(NULL != m_fin.getline(str, sizeof (str)))
` {`
` m_sStr = str;`
` FindName();`
` if`( true == m_bFindName)
` {`
` if`( true == FindKey())
` {`
` m_fin.close();`
` sError =`"" ;
` sValue = m_value;`
` return`true ;
` }`
` }`
``
` }`
` sError = m_sError;`
` m_fin.close();`
` return`false ;
}
/************************************
` 写的方式打开文件`
************************************/
bool CConfigOperator::WriteFile()
{
` m_fout.close();`
` //关闭后要在清空一下，否则下次打开会出错`
` m_fout.clear();`
` m_fout.open(m_sFilePath.c_str(),ios::in|ios::out);`
` if`(NULL == m_fout)
` {`
` m_sError =`"can not open file " +m_sFilePath;
` return`false ;
` }`
` return`true ;
}
/************************************
` 修改配置文件Key对应的值`
************************************/
bool CConfigOperator::ModefyValue()
{
` int`iDelePlace = m_sStr.find( '//' );
` int`iFindEqual = m_sStr.find( '=' );
` //被注释的行，或者是包含key但是已经被注视掉了，过滤`
` if`( (- 1 != iDelePlace && iDelePlace < iFindEqual) || (- 1 != iDelePlace && -1 == iFindEqual) || -1 == iFindEqual )
` {`
` return`false ;
` }`
` string sKey = m_sStr.substr(0,m_sStr.find(`'=' ));
``
` if`(0 == strcmp (sKey.c_str(),m_Key.c_str()))
` {`
` m_sStr = m_sStr.substr(0,m_sStr.find(`'=' ) + 1) + m_value ;
` return`true ;
` }`
``
` return`false ;
}
/************************************
修改后的配置文件信息重新写入文件
************************************/
void CConfigOperator::WriteToFile(vector<string> &vContent)
{
` if`( false == WriteFile())
` {`
` m_fout.close();`
` return`;
` }`
` for`( size_t iIndex = 0; iIndex < vContent.size(); iIndex ++)
` {`
` m_fout<<vContent[iIndex]<<endl;`
` }`
` m_fout.close();`
` vector
}
/************************************
` 修改配置文件NEMA KEY 对应的Value信息`
************************************/
bool CConfigOperator::ModefyConfigValue( const string &sName, const string &skey, const string &sValue,string &sError)
{
` m_sError =`"" ;
` m_Name = sName;`
` m_Key = skey;`
` m_value = sValue;`
` if`( false == WriteFile())
` {`
` sError = m_sError;`
` return`false ;
` }`
` char`str[1024];
` m_bFindName =`false ;
` vector
` bool`isModefy = false ;
` while`(NULL != m_fout.getline(str, sizeof (str)))
` {`
` m_sStr = str;`
``
` FindName();`
` if`( true == m_bFindName)
` {`
` if`( true == ModefyValue())
` {`
` isModefy =`true ;
` }`
` }`
``
` vContent.push_back(m_sStr);`
` }`
` sError = m_sError;`
` WriteToFile(vContent);`
` m_fout.close();`
` return`isModefy;
}
int _tmain( int argc, _TCHAR* argv[])
{
` CConfigOperator tCConfigOperator;`
` string sFielPath =`"D:\\OAM\\UniTester_Code\\cfg\\123\\cfg.ini" ;
` tCConfigOperator.SetFilePath(sFielPath);`
` string sName =`"Admin_Group" ;
` string sKey =`"163253" ;
` string sValue =`"" ;
` string sEroor =`"" ;
` tCConfigOperator.GetConfigValue(sName,sKey,sValue,sEroor);`
` cout<<`"valuse is" <<sValue<< " sEroor is" <<sEroor<<endl;
` sValue =`"ssss" ;
` tCConfigOperator.ModefyConfigValue(sName,sKey,sValue,sEroor);`
` tCConfigOperator.GetConfigValue(sName,sKey,sValue,sEroor);`
` cout<<`"valuse is" <<sValue<< " sEroor is" <<sEroor<<endl;
` char`c;
` c =`getchar ();
` return`0;
}
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