vc文件读写，用fstream和CStdioFile

vc文件读写，用fstream和CStdioFile。

第一种，用fstream:

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#include <afx.h>

#include <iostream>

#include <fstream>

 

using namespace std;

 

// 如srcFile=D:\1.sql，则得到的destFile=D:\1_Result.sql

void GetResultFileName(char * destFile, char * srcFile)

{

    char *p;

    p = strrchr(srcFile, '\\');

    if(p)

    {

        memcpy(destFile, srcFile, p - srcFile + 1);

        srcFile = p + 1;

    }

    p = strrchr(srcFile, '.');

    if(p)

    {

        strncat(destFile, srcFile, p-srcFile);

        strcat(destFile, "_Result");

        strcat(destFile, p);

    }

    else

    {

        strcat(destFile, srcFile);

        strcat(destFile, "_Result");

    }

}

 

// 将srcString中的字符串替换后，写入outFile指向的文件中

void Replace(ofstream & outFile, char *srcString)

{

    char destString[1024] = {0};

    char *p, *pend, *q, *start;

    p = pend = q = start = NULL;

    int index = -1;

    while(srcString)

    {

        if(p = strstr(srcString, "to_date('"))

        {

            strncat(destString, srcString, p-srcString);        // 拷贝to_date前面的字符串

            p += 8;

            q = strstr(p, "'),");           // 搜索子字符串

            pend = strchr(p+1, '\'');       // 搜索特定字符

            strncat(destString, p, pend-p+2);

            srcString = q + 3;

        }

        else

        {

            strcat(destString, srcString);

            break;

        }

    }

    outFile<<destString<<endl;

}

 

void Transform(char *destFile, char * srcFile)

{

    ifstream inFile(srcFile);

    ofstream outFile(destFile);

    if(!inFile && !outFile)

    {

        cout<<"Open File["<<srcFile<<"] Failed."<<endl;

        return;

    }

    char line[1024];

    while(inFile.getline(line, 1024))

    {

//      cout<<"#"<<line<<"#"<<strlen(line)<<endl;

        Replace(outFile, line);

    }

    inFile.close();

    outFile.close();

}

 

void main()

{

    char srcFile[] = "D:\\11.sql";

    char destFile[100] = {0};

    GetResultFileName(destFile, srcFile);

    Transform(destFile, srcFile);

}

 

另一种，使用CStdioFile，主要代码如下（完整源码）：

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/*

    功能：将srcFile中所有的to_date('x', 'y')转换为'x', 并将时间改为格式：年-月-日 hh24:mi:ss

    @destFile:  输出文件全路径

    @srcFile:   输入文件全路径

*/

void CFileReplaceDlg::Transform(CString destFile, CString srcFile)

{

    CStdioFile inFile(srcFile, CStdioFile::modeRead);

    CStdioFile outFile(destFile, CStdioFile::modeCreate | CStdioFile::modeWrite);

    CString line;

    while(inFile.ReadString(line) != NULL)

    {

        Replace(outFile, line);

    }

    inFile.Close();

    outFile.Close();

}

界面如下：