windows 与linux 下用C++读取sqlite实现文件复制（二）

 1 //在数据库中查询表：
 2     // 执行SQL 
 3     char **dbResult; //是 char ** 类型，两个*号
 4     int nRow, nColumn;
 5     sprintf(sql, "select * from test1");
 6     int result = sqlite3_get_table( conndb, sql, &dbResult, &nRow, &nColumn, &err_msg );
 7     if( SQLITE_OK == result )//查询成功
 8     {
 9         if ( dbResult != 0)
10         {
11             for (int index = 1; index <= nRow; index++)
12             {    
13                 printf( "第 %d 条记录 \n", index );
14                 if (nColumn != 3)
15                     return -1;
16                 char  SourcePath[256], DesPath[256];  
17                 strcpy(SourcePath, dbResult[index*nColumn  + 1]);
18                 strcpy(DesPath, dbResult[index*nColumn + 2]);
19                 printf("SourcePath: %s\n", SourcePath);
20                 printf("DesPath: %s\n", DesPath);
21 
22                 CheckDirectory( DesPath );
23                 strcpy(DesPath, dbResult[index*nColumn + 2]);
24                 if(CopyFile(SourcePath,DesPath))
25                 {
26                     cout<<"文件已成功复制..."<<endl;
27                 }
28                 else
29                 {
30                     cout<<"文件复制失败..."<<endl;
31                 }
32 
33 
34                 sprintf(sql ,"update test1 set des=src where id =%d", index);
35                 int bRet = sqlite3_exec(conndb, sql,NULL,NULL,&err_msg);
36                 /* 如果执行成功，则删除记录 */
37                 if (bRet == SQLITE_OK)
38                 {
39                     sprintf(sql, "delete from test1 where id =%d", index);
40                     sqlite3_exec(conndb, sql, NULL, NULL, &err_msg);
41                 }
42             }
43         }
44 
45     }else//查询失败
46     {
47         Sleep(100000);  
48     }
49     //到这里，不论数据库查询是否成功，都释放 char** 查询结果，使用 sqlite 提供的功能来释放
50     sqlite3_free_table( dbResult );    

 1 // 遍历目录
 2 bool CheckDirectory( char* pszPath )
 3 {
 4     vector< std::string > vtPath;
 5 
 6     const char* sep = "\/";
 7     char* next_token;
 8     char* token =  strtok_s( pszPath, sep, &next_token);
 9     while( token != NULL )
10     {
11         vtPath.push_back( token );
12         token = strtok_s(NULL, sep, &next_token);
13     }
14 
15     if ( vtPath.size() > 0 )
16     {
17         if ( vtPath[0] == "." )
18             vtPath.erase( vtPath.begin() );
19     }
20 
21     // 核查所有路径是否存在
22     std::string strCurPath;
23     for( size_t i = 0; i  < (int)vtPath.size(); ++i )
24     {
25 
26 
27         //cout << vtPath[i] << endl;
28 
29         if (i==0)
30         {
31             strCurPath += vtPath[i];
32         }
33         else if (i < (int)vtPath.size()-1)
34         {
35             strCurPath +=‘\/‘;
36             strCurPath += vtPath[i];
37 
38 
39         }
40         if ( !CreateDirectory(strCurPath.c_str(),777))
41         {
42             return false;
43         }
44 
45     }
46     strCurPath +=‘\/‘;
47     strCurPath += vtPath[(int)vtPath.size()-1];
48     if( !isExistFile(strCurPath.c_str()))
49     {
50         return false;
51     }
52 
53     return true;
54 }