运用ORACLE的OO4O类库函数解决调用存储过程向远程数据库上传超过32K图片失败的问题

前段时间尝试用了ODBC和ADO连接并上传图片都没能超过32K限制，最近用了OO4O终于解决了这个问题。方法及代码如下：

1 下载客户端

    ORACLE官方下载链接：http://download.oracle.com/otn/other/ole-oo4o/ODAC101040.exe

2 安装并配置：

    解压后，双击/disk/setup.exe，一路下一步，直到出现如下界面，并按图的顺序一路配置：

图1 直接点下一步

 

图2  点下一步

 

图3 在文本内输入服务名

 

........................

            实在贴不动了，依照顺序输入：协议，远程数据库IP，端口，用户名，口令然后点确定，完成 本地NET服务名配置（也可以直接跳过此配置，在以后通过开始->程序->Oracle - OraClient10g_home1->Configuration and Migration Tools->Net Configuration Assistant 工具配置）。

3. 代码：（该代码调试通过）

#include "stdafx.h"

#include <stdlib.h>
#include <oracl.h>
#include <iostream.h>
#include <fstream.h>

// Example for OParameter, OParamArray Raw example
int main()
{

 //Initialize oo4o, connect, execute sql
 OStartup();
 ODatabase odb("NLV", "NLV_GUEST", "GUEST");
 if (!odb.IsOpen())
 { 
  cout <<"Connect Error: "<<odb.GetErrorText()<<endl;
  return 1;
 }
 else cout << "Connect DataBase OK!" << endl;

 //Init Parameters
 OParameterCollection params = odb.GetParameters();
 OParameter hpzl = params.Add("hpzl", "5", OPARAMETER_INVAR, OTYPE_VARCHAR2);
 OParameter hphm = params.Add("hphm", "粤C00009", OPARAMETER_INVAR, OTYPE_VARCHAR2);
 OParameter wfsj = params.Add("wfsj", "2008-08-19 09:04:45", OPARAMETER_INVAR, OTYPE_DATE);
 OParameter wfxw = params.Add("wfxw", "16037", OPARAMETER_INVAR, OTYPE_VARCHAR2);
 OParameter wfdd = params.Add("wfdd", "60108", OPARAMETER_INVAR, OTYPE_VARCHAR2);
 OParameter wfdz = params.Add("wfdz", "新增路口", OPARAMETER_INVAR, OTYPE_VARCHAR2);
 OParameter cjjg = params.Add("cjjg", "3707860100", OPARAMETER_INVAR, OTYPE_VARCHAR2);
 OParameter sjly = params.Add("sjly", "2", OPARAMETER_INVAR, OTYPE_VARCHAR2);
 OParameter zplx = params.Add("zplx", "1", 1, OPARAMETER_INVAR, OTYPE_CHAR);
 OParameter sbbh = params.Add("sbbh", "37078610045", OPARAMETER_INVAR, OTYPE_VARCHAR2);
 OParameter cdbh = params.Add("cdbh", "", OPARAMETER_INVAR, OTYPE_VARCHAR2);
 OParameter clsd = params.Add("clsd", 55, OPARAMETER_INVAR, OTYPE_NUMBER);
 OParameter dcxs = params.Add("dcxs", 1, OPARAMETER_INVAR, OTYPE_NUMBER);
 OParameter kcxs = params.Add("kcxs", 1, OPARAMETER_INVAR, OTYPE_NUMBER);
 OParameter xcxs = params.Add("xcxs", 1, OPARAMETER_INVAR, OTYPE_NUMBER);
 OParameter dczfxs = params.Add("dczfxs", 1, OPARAMETER_INVAR, OTYPE_NUMBER);
 OParameter kczfxs = params.Add("kczfxs", 1, OPARAMETER_INVAR, OTYPE_NUMBER);
 OParameter xczfxs = params.Add("xczfxs", 1, OPARAMETER_INVAR, OTYPE_NUMBER);
 OParameter zdxs = params.Add("zdxs", 1, OPARAMETER_INVAR, OTYPE_NUMBER);

 // write data to BLOB
 fstream fs;
 fs.open("c://more_than_32k.jpg", ios::in);
 fs.setmode(filebuf::binary);
 fs.seekg(0, ios::end);
 unsigned long filesize = fs.tellg();
 fs.seekg(0, ios::beg);

 cout <<"filesize: "<<filesize<<endl;

 OBlob b_lob(odb);
 unsigned long optchunk = b_lob.GetOptimumChunkSize();
 unsigned int bufsize = ((int)(32768/optchunk)) *optchunk;
 unsigned char * buffer;
 buffer = (unsigned char *)malloc(bufsize);

 unsigned long totalwritten = 0;
 unsigned long amtread = 0;
 int piecetype = OLOB_FIRST_PIECE; 
 if (filesize <= bufsize)
  piecetype = OLOB_ONE_PIECE;
 else           
  b_lob.EnableStreaming(filesize);

 while(totalwritten != filesize)
 {
  fs.read(buffer, bufsize);
  amtread = fs.gcount();

  b_lob.Write(buffer, amtread, piecetype);
  totalwritten = totalwritten + amtread;
  if ((filesize - totalwritten)<=bufsize)
   piecetype = OLOB_LAST_PIECE;
  else
   piecetype = OLOB_NEXT_PIECE;
 }
 b_lob.DisableStreaming();
 fs.close();
 
 OParameter zjwj1 = params.Add("zjwj1", b_lob, OPARAMETER_INVAR, OTYPE_BLOB);
 OParameter zjwj2 = params.Add("zjwj2", b_lob, OPARAMETER_INVAR, OTYPE_BLOB);
 OParameter zjwj3 = params.Add("zjwj3", b_lob, OPARAMETER_INVAR, OTYPE_BLOB);
 OParameter zxjg = params.Add("zxjg", 19, OPARAMETER_INOUTVAR, OTYPE_UINT);
 OValue oval;
 oval.Clear();
 zjwj2.SetValue(oval);
 zjwj3.SetValue(oval);

 unsigned long size = b_lob.GetSize();
 printf("blob size = %d/n", size);

 oresult r = odb.ExecuteSQL("BEGIN nlv_cache.nlv_package.pro_tgs(:hpzl, :hphm, :wfsj, :wfxw, :wfdd, :wfdz, :cjjg, :sjly, :zplx, :sbbh, :cdbh, :clsd, :dcxs, :kcxs, :xcxs, :dczfxs, :kczfxs, :xczfxs, :zdxs, :zjwj1, :zjwj2, :zjwj3, :zxjg);END;");
 if (r == OFAILURE)
 {
  cout <<"Execute Error: "<<odb.GetErrorText()<<endl;
  return 1;
 }

 int ret;
 zxjg.GetValue(&ret);
 printf("ZXJG = %d/n", ret);
 odb.Close();

 return 0;
}

 

4. 完成