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Mysql LONGBLOB 類(lèi)型存儲(chǔ)二進(jìn)制數(shù)據(jù) (修改+調(diào)試+整理)

更新時(shí)間：2009年07月09日 14:24:50 作者：

代碼來(lái)自網(wǎng)絡(luò)，我學(xué)習(xí)整理了一下，測(cè)試通過(guò)，下面的參數(shù)需要設(shè)置為你自己的

在DBMS中線要?jiǎng)?chuàng)建數(shù)據(jù)庫(kù)test，table bintest，data字段數(shù)據(jù)類(lèi)型用LONGBLOB即可測(cè)試
//測(cè)試文件c:\\test.iso，你可以找任何一個(gè)文件修改為即可，我找的是一個(gè)exe程序，修改為test.iso而已
//最大測(cè)試過(guò)加入文件大小為650M(一個(gè)正真的iso文件)
//注意：還要修改my.ini文件中的max_allowed_packet字段，我設(shè)置的是

復(fù)制代碼代碼如下:

 
//max_allowed_packet = 1024M 
//#define host "localhost" //mysql server 
//#define username "root" 
//#define password "674800" 
//#define database "test" 
//int port = 3306; 
// Mysql3.cpp : Defines the entry point for the console application. 
// 
#include "stdafx.h" 
#include <Winsock2.h> 
#include <mysql.h> 
#include <string.h> 
#include <stdio.h> 
#include <stdlib.h> 
#include <sys/types.h> 
#include <sys/stat.h> 
#include <fcntl.h> 
#pragma comment(lib,"libmysql.lib") 
#define INSERT_QUERY "INSERT INTO bintest(id, data) VALUES(NULL, ?)" 
#define host "localhost" //mysql server 
#define username "root" 
#define password "674800" 
#define database "test" 
int port = 3306; 
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; 
} 
void test() 
{ 
MYSQL_BIND bind[1]; 
unsigned long length; 
char* pos = NULL; 
off_t size; 
FILE* fp; 
char* 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 ((pos = (char *)malloc(sizeof(char)*(size+1))) == NULL) 
{ 
perror("malloc buf" ); 
exit(1); 
} 
if ((fp = fopen(filename, "rb" )) == NULL) //讀文件 
{ 
perror("fopen file" ); 
exit(1); 
} 
if ((fread(pos, 1, size, fp)) < 0) //讀文件失敗 
{ 
perror("fread file" ); 
exit(1); 
} 
MYSQL *mysql = mysql_init(NULL); //mysql 初始化 
if (!mysql) 
return; 
if (!mysql_real_connect(mysql,host,username,password,"test",port,NULL,0))//鏈接服務(wù)器 
{ 
int ret = mysql_errno(mysql); 
mysql_close(mysql); 
return; 
} 
MYSQL_STMT *stmt = mysql_stmt_init(mysql); 
if (!stmt) 
{ 
fprintf(stderr, " mysql_stmt_init(), out of memory\n"); 
exit(0); 
} 
if (mysql_stmt_prepare(stmt, INSERT_QUERY, strlen(INSERT_QUERY))) 
{ 
fprintf(stderr, "\n mysql_stmt_prepare(), INSERT failed"); 
fprintf(stderr, "\n %s", mysql_stmt_error(stmt)); 
exit(0); 
} 
memset(bind, 0, sizeof(bind)); 
//bind[0].buffer_type= MYSQL_TYPE_STRING; 
//bind[0].buffer_type = MYSQL_TYPE_LONG; 
bind[0].buffer = pos; 
//bind[0].buffer_type = MYSQL_TYPE_TINY; 
bind[0].buffer_type = MYSQL_TYPE_BLOB; 
bind[0].length= &length; 
bind[0].is_null= 0; 
/* Bind the buffers */ 
if (mysql_stmt_bind_param(stmt, bind)) 
{ 
fprintf(stderr, "\n param bind failed"); 
fprintf(stderr, "\n %s", mysql_stmt_error(stmt)); 
exit(0); 
} 
int rc =0; 
/* Supply data in chunks to server */ 
if (mysql_stmt_send_long_data(stmt,0, pos, size)) 
{ 
fprintf(stderr, "\n send_long_data failed"); 
fprintf(stderr, "\n %s", mysql_stmt_error(stmt)); 
exit(0); 
} 
// pos += size; 
/* Supply the next piece of data */ 
if (mysql_stmt_send_long_data(stmt,0, pos, size)) 
{ 
fprintf(stderr, "\n send_long_data failed"); 
fprintf(stderr, "\n %s", mysql_stmt_error(stmt)); 
exit(0); 
} 
/* Now, execute the query */ 
if (mysql_stmt_execute(stmt)) 
{ 
fprintf(stderr, "\n mysql_stmt_execute failed"); 
fprintf(stderr, "\n %s", mysql_stmt_error(stmt)); 
exit(0); 
} 
} 
int main() 
{ 
test(); 
//sleep(1); 
return 0; 
} 