MySql2.cpp : Defines the entry point for the console application.
#include "stdafx.h"文章源自很文博客https://www.hinvn.com/很文博客-https://www.hinvn.com/51379.html
//是前一篇的姐妹篇文章源自很文博客https://www.hinvn.com/很文博客-https://www.hinvn.com/51379.html
//代码来自网络,我学习整理了一下,测试通过,下面的参数文章源自很文博客https://www.hinvn.com/很文博客-https://www.hinvn.com/51379.html
//需要设置为你自己的文章源自很文博客https://www.hinvn.com/很文博客-https://www.hinvn.com/51379.html
//在DBMS中线要创建数据库www,table www,file字段数据类型用LONGTEXT即可测试文章源自很文博客https://www.hinvn.com/很文博客-https://www.hinvn.com/51379.html
//测试文件c:\\test.iso,你可以找任何一个文件修改为即可,我找的是一个exe程序,修改为test.iso而已文章源自很文博客https://www.hinvn.com/很文博客-https://www.hinvn.com/51379.html
//最大测试过加入文件大小为650M(一个正真的iso文件)文章源自很文博客https://www.hinvn.com/很文博客-https://www.hinvn.com/51379.html
//注意:还要修改my.ini文件中的max_allowed_packet字段,我设置的是
- //max_allowed_packet = 1024M
- //#define host "localhost" //mysql server
- //#define username "root"
- //#define password "674800"
- //#define database "test"
- //int port = 3306;
- #include <Winsock2.h>
- #include <stdio.h>
- #include <mysql.h>
- #include <stdlib.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <fcntl.h>
- #define host "localhost" //mysql server
- #define username "root"
- #define password "674800"
- #define database "www"
- int port = 3306;
- #pragma comment(lib,"libmysql.lib")
- //得到文件的大小(字节数)
- int get_file_size(char *path, off_t *size)
- {
- struct stat file_stats;
- if(stat(path, &file_stats))
- return -1;
- *size = file_stats.st_size;
- return 0;
- }
- int main(int argc, char *argv[])
- {
- char *filename=NULL;
- off_t size;
- MYSQL *conn=NULL;
- MYSQL_RES *res_set=NULL;
- MYSQL_ROW row;
- MYSQL_FIELD *field=NULL;
- int i, flag;
- char *sql; //sql语句
- FILE *fp;
- char *buf;
- int n=256;
- char *end;
- unsigned long *length;
- /* if (argc != 2)
- {
- printf("Usage: %s srcfile\n", argv[0]);
- exit(1);
- }
- */
- filename = "c:\\test.iso";
- if ((get_file_size(filename, &size)) == -1) //得到文件的大小
- {
- perror("get file size" );
- exit(1);
- }
- if ((buf = (char *)malloc(sizeof(char)*(size+1))) == NULL)
- {
- perror("malloc buf" );
- exit(1);
- }
- if ((fp = fopen(filename, "rb" )) == NULL) //读文件
- {
- perror("fopen file" );
- exit(1);
- }
- if ((n = fread(buf, 1, size, fp)) < 0) //读文件失败
- {
- perror("fread file" );
- exit(1);
- }
- sql = (char *)malloc(sizeof(char)*n*2+256); //2n+1+strlen(other sql)
- if (sql == NULL)
- {
- perror("malloc sql" );
- exit(1);
- }
- conn = mysql_init(NULL);//生产一个mysql对象
- if (conn == NULL)
- {
- printf("init mysql, %s\n", mysql_error(conn));
- exit(1);
- }
- if ((mysql_real_connect(conn, host, username, password, database, port, NULL, 0)) == NULL) //连接服务器
- {
- printf("connect mysql, %s\n", mysql_error(conn));
- exit(1);
- }
- strcpy(sql, "insert into www(id, name, file) values(NULL, 'peter', " );
- end = sql;
- end += strlen(sql); //point sql tail
- //convert NUL(ASCII 0)、'\n'、'\r'、'\''、'''、'"'和Control-Z and so on
- *end++ = '\'';
- end += mysql_real_escape_string(conn, end, buf, n);
- *end++ = '\'';
- *end++ = ')';
- flag = mysql_real_query(conn, sql, (unsigned int)(end-sql));
- if (flag != 0)
- {
- printf("insert failed, %s\n", mysql_error(conn));
- exit(1);
- }
- if ((mysql_real_query(conn, "SELECT file FROM www where id=1", 31)) != 0)
- {
- printf("insert failed, %s\n", mysql_error(conn));
- exit(1);
- }
- res_set = mysql_store_result(conn);
- fclose(fp);
- fp = NULL;
- fp = fopen("c:\\123.iso", "wb" );
- while ((row = mysql_fetch_row(res_set)) != NULL)
- {
- length = mysql_fetch_lengths(res_set);
- for (i=0; i<mysql_num_fields(res_set); i++)
- {
- fwrite(row[0], 1, length[0], fp);
- //printf("%s\n",row[0]);
- }
- }
- fclose(fp);
- mysql_close(conn);
- free(sql);
- free(buf);
- sql = NULL;
- return 0;
- }
运行结果:
![weinxin](/wp-content/uploads/8ecC3tdI2NASHRM.png)
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