《MYSQL教程Mysql LONGBLOB 类型存储二进制数据 (修改+调试+整理)》要点：

本文介绍了MYSQL教程Mysql LONGBLOB 类型存储二进制数据 (修改+调试+整理)，希望对您有用。如果有疑问，可以联系我们。在DBMS中线要创建数据库test,table bintest,data字段数据类型用LONGBLOB即可测试

//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

//最大测试过加入文件大小为650M(一个正真的iso文件)

//注意：还要修改my.ini文件中的max_allowed_packet字段,我设置的是

代码如下:

//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

#include

#include

#include

#include

#include

#include

#include

#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) //读文件

{

perror("fopen file" );

exit(1);

}

if ((fread(pos,1,size,fp)) < 0) //读文件失败

{

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))//链接服务器

{

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,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,mysql_stmt_error(stmt));

exit(0);

}

int rc =0;

/* Supply data in chunks to server */

if (mysql_stmt_send_long_data(stmt,pos,size))

{

fprintf(stderr,"\n send_long_data failed");

fprintf(stderr,mysql_stmt_error(stmt));

exit(0);

}

// pos += size;

/* Supply the next piece of data */

if (mysql_stmt_send_long_data(stmt,mysql_stmt_error(stmt));

exit(0);

}

/* Now,execute the query */

if (mysql_stmt_execute(stmt))

{

fprintf(stderr,"\n mysql_stmt_execute failed");

fprintf(stderr,mysql_stmt_error(stmt));

exit(0);

}

}

int main()

{

test();

//sleep(1);

return 0;

}

运行结果: