C++读写配置文件

亦凉 2022-06-12 14:51 583阅读 0赞

`` `#include<iostream>`

`#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<string>().swap(vContent);`

`}`

`/************************************`

`` `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<string> vContent;`

`` `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;`

`}`

C++读写配置文件

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