笔迹鉴别程序

考试的笔迹鉴别程序，分辨出不同人写的笔迹

测试/服务器测试/输出文件/输出待检测检测文件 source/DBop.cpp

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+/*
+实现文件：DBop.cpp 数据库操作实现文件
+*/
+#include "DBop.h"
+
+/*本地的全局变量*/
+
+_ConnectionPtr	p_conn;			/*全局变量 连接对象*/
+_RecordsetPtr	p_recordset;	/*全局变量 记录集对象*/
+_CommandPtr		p_cmd;			/*全局变量 操作集对象*/
+string			str_conn;		/*全局变量 连接字符串设置*/
+
+
+/**
+功能：	查询所有学生的学号，将所有的指定位置的数据库信息(学号)全部存储在名为stu的vector<string>型的变量中
+
+@变量 stu 学生学号存储
+@返回值 成功1 失败0
+*/
+int DbStu(vector<string>& stu)
+{
+	/*字符转换，方便使用*/
+	string userName(g_db_userName.c_str());
+	string password(g_db_password.c_str());
+	string hostName(g_db_hostName.c_str());
+	string dBName(g_db_dBName.c_str());
+
+	//连接字串设置	//因为strConn是全局变量，因此仅仅初始化一次
+	str_conn = "Provider=OraOLEDB.Oracle";
+	str_conn += ";Persist Security Info = true";
+	str_conn += ";User ID = ";	//==================//	
+	str_conn += userName;		//===仅初始化一次===//
+	str_conn += ";Password=";	//==================//
+	str_conn += password;
+	str_conn += ";Data Source = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)";
+	str_conn += "(HOST=";
+	str_conn += hostName;
+	str_conn += ")(PORT=1521))(CONNECT_DATA=";
+	str_conn += "(SERVICE_NAME=";
+	str_conn += dBName;
+	str_conn += ")))";
+
+	::CoInitialize(NULL);//初始化com组件
+
+	//连接数据库，并执行sql查询语句	【必须要用try catch捕获异常】
+	try{
+		p_conn.CreateInstance("ADODB.Connection");//创建连接
+		p_recordset.CreateInstance("ADODB.Recordset");//创建结果集,也就是实例化
+		p_cmd.CreateInstance("ADODB.Command");
+
+		p_conn->CursorLocation = adUseClient; //存储过程同时返回记录集和返回值
+		p_conn->Open(_bstr_t(str_conn.c_str()), _bstr_t(userName.c_str()), _bstr_t(password.c_str()), adConnectUnspecified);
+		p_cmd->ActiveConnection = p_conn;
+
+		//SELECT KS_ZKZ FROM ZK.V_BYSQ_BJSH_JQ_KS
+		//SELECT DISTINCT(KS_ZKZ2) FROM ZK.T_BYSQ_KS_KC WHERE KSSJ BETWEEN '200907' AND '201510'
+		//SELECT * FROM ZK.T_BYSQ_KS_KC WHERE (SUBSTR(KS_ZKZ2,1,2) = '02' OR SUBSTR(KS_ZKZ2,1,2) = '03')
+		//SELECT KS_ZKZ2 FROM ZK.T_BYSQ_KS_KC WHERE KSSJ between '200907' and '201510' AND (SUBSTR(KS_ZKZ2,1,2) = '02') AND BJSH_JG_JQ IS NULL GROUP BY KS_ZKZ2 HAVING COUNT(KS_ZKZ2)>1
+		/*HRESULT hr1 = pRecordset->Open("SELECT KS_ZKZ FROM ZK.T_BYSQ_KS_KC WHERE KSSJ between '200907' and '201510' AND (SUBSTR(KS_ZKZ2,1,2) = '02') AND BJSH_JG_JQ IS NULL GROUP BY KS_ZKZ HAVING COUNT(KS_ZKZ)>1",*/
+
+
+		/*构造查询语句*/
+		int zong_flag = g_db_qurry_zone.length();
+		int num_flag = g_db_qurry_stu_num.length();
+		int date_flag = g_db_qurry_start.length();
+
+		string str_qurry = "SELECT KS_ZKZ FROM YANNSY.T_BYSQ_KS_KC WHERE KSSJ between ";
+		str_qurry += g_db_qurry_start;
+		str_qurry += " and ";
+		str_qurry += g_db_qurry_end;
+
+//		cout<<str_qurry.c_str()<<endl;
+		if (num_flag - 1)//长度大于1，就是需要查询学号
+		{
+			str_qurry += "AND KS_ZKZ = ";
+			str_qurry += g_db_qurry_stu_num;
+		}
+		else//不需要查询单个学号才会有区域的作用范围
+		{
+			if ((zong_flag - 1))//长度大于1,就是需要查询区域,且查询时间
+			{
+				str_qurry += " AND(SUBSTR(KS_ZKZ2, 1, 2) = ";
+				str_qurry += g_db_qurry_zone;
+				str_qurry += ")";
+			}
+		}
+		if (g_db_qurry_all)
+		{
+			str_qurry += " AND BJSH_JG_JQ IS NULL";
+		}
+		str_qurry += " GROUP BY KS_ZKZ HAVING COUNT(KS_ZKZ)>1";
+		_variant_t _vstr_qurry(str_qurry.c_str());/* 转换string为_variant_t */
+
+
+
+		/*查询*/
+		HRESULT hr1 = p_recordset->Open(_vstr_qurry,
+			p_conn.GetInterfacePtr(),
+			adOpenStatic,
+			adLockOptimistic,
+			adCmdText);
+		if (!(SUCCEEDED(hr1))){ exit(-1); }//读取不成功，直接退出程序
+
+		int count_exit = 10;
+		do
+		{//读取成功，将每一行存到vector的stu末尾
+			stu.push_back((string)(_bstr_t)(p_recordset->Fields->GetItem(_variant_t("KS_ZKZ"))->GetValue()));
+			p_recordset->MoveNext();//移到下一条
+		} while (!p_recordset->EndOfFile && count_exit--);//条件是没有到所有记录的末尾
+	}
+	catch (_com_error e){
+		cout << "<提取学号(数据库):>查询失败--" << endl;
+		cout<<e.Error()<<" "<<e.ErrorMessage()<<" "<<e.ErrorInfo()<<endl;
+	}
+	/*=================================================================================================*/
+
+	//3、关闭查询====//执行读取完毕后要关闭连接
+	try	{ ::CoUninitialize(); }
+	catch (_com_error e){ /*cout << "<提取学号:关闭失败-->"  << e.ErrorInfo() << endl;*/ }
+
+	cout<<"查询完毕"<<endl;
+	return 1;
+}