[ { "path": "C++封装MySQL数据库连接器类和消息管理类.cpp", "content": "#include \n#include \n#include \n#include \n#include \n#include \n#include \n#include //必须在包含mysql.h之前包含windows.h\n#include \n\nusing std::string;\nusing std::vector;\nusing std::endl;\n\n///数据库连接器类,负责连接数据库,并封装基本的数据库相关操作\nclass DB_Connector {\nprotected:\n MYSQL* mysql;\npublic:\n static string host_, user_, passwd_, db_;\npublic:\n inline DB_Connector();\n inline virtual ~DB_Connector();\n //执行sql语句,成功则返回0,失败返回非0\n inline int query(const string& sql);\n //返回上一次的错误提示\n inline string error();\n //获取结果集,将其保存到二维string数组中\n inline vector > getResult();\n};\n\nDB_Connector::DB_Connector()\n{\n mysql = mysql_init(NULL);\n if (mysql_real_connect(mysql, host_.c_str(), user_.c_str(),\n passwd_.c_str(), db_.c_str(), 0, 0, 0) == 0) {\n string err = \"Failed to connect database server: \" + error();\n throw std::logic_error(err);\n }\n query(\"set names 'GBK'\");//设置字符集,防止中文出现乱码\n}\n\nDB_Connector::~DB_Connector()\n{\n mysql_close(mysql);\n}\n\n//执行sql语句,成功则返回0,失败返回非0\nint DB_Connector::query(const string& sql)\n{\n return mysql_query(mysql, sql.c_str());\n}\n\n//返回上一次的错误提示\nstring DB_Connector::error()\n{\n return mysql_error(mysql);\n}\n\n//获取结果集,将其保存到二维string数组中\nvector > DB_Connector::getResult()\n{\n vector >result;\n MYSQL_RES* res = mysql_store_result(mysql);\n if (res == NULL)\n return result;\n unsigned num = mysql_num_fields(res); //结果集的列数\n for (MYSQL_ROW row; (row = mysql_fetch_row(res)) != NULL;) {\n result.push_back(vector(num));\n for (size_t cur = result.size() - 1, i = 0; i < num; ++i) {\n result[cur][i] = row[i];\n }\n }\n mysql_free_result(res); //释放结果集资源\n return result;\n}\n\n\n///消息管理类\nclass DB_Msg {\nprotected:\n DB_Connector db_conn; //数据库连接器对象\n const string tbName; //要操作的表名\n std::ofstream fsLog; //日志记录文件流\npublic:\n inline DB_Msg(const string& _tableName, const string& _logFileName);\n inline virtual ~DB_Msg();\n //添加消息\n inline void push(const string& to, const string& from, const string& msg);\n //获取执行指定sql语句后的结果\n inline vector > getBySql(const string& sql);\n //根据指定sql语句删除相应记录\n inline void removeBySql(const string& sql);\n //获取当前日期和时间,用于更新日志\n inline static string getTime();\nprotected:\n //创建存储聊天记录的表\n inline void createTable();\n};\n\nDB_Msg::DB_Msg(const string& _tableName, const string& _logFileName)\n : tbName(_tableName)\n{\n if (_logFileName != \"\") {\n fsLog.open(_logFileName, std::ios::app);\n }\n createTable();\n}\n\nDB_Msg::~DB_Msg()\n{\n if (fsLog) {\n fsLog.close();\n }\n}\n//添加消息\nvoid DB_Msg::push(const string& to, const string& from, const string& msg)\n{\n string sql = \"insert into \" + tbName + \"(toUser,fromUser,msg) values('\"\n + to + \"','\" + from + \"','\" + msg + \"')\";\n if (fsLog) {\n fsLog << getTime() << \">>>execute: \" + sql << endl;\n }\n if (db_conn.query(sql) != 0 && fsLog) { //执行sql语句失败返回非0\n fsLog << \"Failed to insert: \" << db_conn.error() << endl;\n }\n}\n//获取执行指定sql语句后的结果\nvector > DB_Msg::getBySql(const string& sql)\n{\n vector >result;\n if (fsLog) {\n fsLog << getTime() << \">>>execute: \" + sql << endl;\n }\n if (db_conn.query(sql) == 0) { //执行成功则把结果输出\n result = db_conn.getResult();\n } else if (fsLog) {\n fsLog << \"Failed to search: \" << db_conn.error() << endl;\n }\n return result;\n}\n//根据指定sql语句删除相应记录\nvoid DB_Msg::removeBySql(const string& sql)\n{\n if (fsLog) {\n fsLog << getTime() << \">>>execute: \" << sql << endl;\n }\n if (db_conn.query(sql) != 0 && fsLog) {\n fsLog << \"Failed to delete: \" << db_conn.error() << endl;\n }\n}\n//获取当前日期和时间,用于更新日志\ninline string DB_Msg::getTime()\n{\n char time_buf[64];\n time_t now_time = time(NULL);\n strftime(time_buf, 64, \"%Y-%m-%d %H:%M:%S \", localtime(&now_time));\n return time_buf;\n}\n//创建存储聊天记录的表\nvoid DB_Msg::createTable()\n{\n db_conn.query(\"show tables like '\" + tbName + \"'\");\n auto res = db_conn.getResult();\n if (res.size() > 0 && res[0][0] == tbName) {\n return;\n }\n string sql = \"CREATE TABLE `\" + tbName + \"` (\"\n \"`id` tinyint(4) NOT NULL AUTO_INCREMENT,\"\n \"`toUser` varchar(20) NOT NULL,\"\n \"`fromUser` varchar(20) NOT NULL,\"\n \"`time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,\"\n \"`msg` text NOT NULL,\"\n \"PRIMARY KEY (`id`)\"\n \") ENGINE=InnoDB DEFAULT CHARSET=utf8;\";\n if (fsLog) {\n fsLog << getTime() << \">>>execute: \" << sql << endl;\n }\n if (db_conn.query(sql) != 0 && fsLog) {\n fsLog << \"Failed to create: \" << db_conn.error() << endl;\n }\n}\n\n\n///离线消息管理类 - 仅用于服务器端\nclass DB_OfflineMsg : public DB_Msg {\npublic:\n DB_OfflineMsg(const string& _tableName, const string _logFileName = \"\")\n : DB_Msg(_tableName, _logFileName)\n {}\n //从离线消息表中得到所有发送给user的消息,提取完后从数据库删除\n inline vector > pop(const string& user);\n};\n\n//从离线消息表中得到所有发送给user的消息,提取完后从数据库删除\nvector > DB_OfflineMsg::pop(const string& user)\n{\n string sql = \"select fromUser,time,msg from \" + tbName\n + \" where toUser='\" + user + \"'\";\n vector >result = getBySql(sql);\n //删除发给user的所有消息\n if (result.size() > 0) {\n sql = \"delete from \" + tbName + \" where toUser='\" + user + \"'\";\n removeBySql(sql);\n }\n return result;\n}\n\n///聊天记录消息管理类\nclass DB_ChatLogMsg : public DB_Msg {\npublic:\n //用户名标识用户,日志文件名为空时不建立前缀用于区分是在客户端还是服务器端\n inline DB_ChatLogMsg(const string& _userName, const string _logFileName = \"\",\n const string& _prefix = \"\")\n : DB_Msg(_prefix + \"chat_log_\" + _userName, _logFileName), userName(_userName)\n {}\n //添加聊天记录消息\n inline void push(const string& userOthers, const string& msg, bool isReceived = 1);\n //添加收到的带时间记录的离线消息\n inline void pushOffline(const string& from, const string& msg, const string& _time);\n //获取消息user发来的或发给user的所有消息\n inline vector > get(const string& user);\n //在该用户的聊天记录中查找与withUser的包含str的消息记录\n inline vector > find(const string& str, const string& withUser = \"*\");\n //根据传递的用户名删除与对应用户的聊天记录,传入\"*\"则删除所有记录\n inline void remove(const string& user);\n //获取与当前用户有聊天记录的用户列表\n inline vector getUserWithChatLog();\n //获取当前用户的用户名\n inline const string& getUserName();\nprotected:\n string userName; //该用户的用户名\n};\n\n//添加聊天记录消息\nvoid DB_ChatLogMsg::push(const string& userOthers, const string& msg, bool isReceived)\n{\n if (isReceived) { //收到消息\n DB_Msg::push(userName, userOthers, msg);\n } else { //发送消息\n DB_Msg::push(userOthers, userName, msg);\n }\n}\n//添加收到的带时间记录的离线消息\nvoid DB_ChatLogMsg::pushOffline(const string& from, const string& msg,\n const string& _time)\n{\n string sql = \"insert into \" + tbName + \"(toUser,fromUser,time,msg) values('\"\n + userName + \"','\" + from + \"','\" + _time + \"','\" + msg + \"')\";\n if (fsLog) {\n fsLog << getTime() << \">>>execute: \" + sql << endl;\n }\n if (db_conn.query(sql) != 0 && fsLog) { //执行sql语句失败返回非0\n fsLog << \"Failed to insert: \" << db_conn.error() << endl;\n }\n}\n//获取消息user发来的或发给user的所有消息\nvector > DB_ChatLogMsg::get(const string& user)\n{\n string sql = \"select fromUser,time,msg from \" + tbName +\n \" where toUser='\" + user + \"' or fromUser='\" + user + \"'\";\n return getBySql(sql);\n}\n//在该用户的聊天记录中查找与withUser的包含str的消息记录\nvector > DB_ChatLogMsg::find(const string& str, const string& withUser)\n{\n string sql = \"select fromUser,toUser,time,msg from \" + tbName + \" where \";\n if (withUser != \"*\") {\n sql += \"(toUser='\" + withUser + \"' or fromUser='\" + withUser + \"') and\";\n }\n sql += \" msg like '%\" + str + \"%'\";\n return getBySql(sql);\n}\n//根据传递的用户名删除与用户user的聊天记录,传入\"*\"则删除所有记录\nvoid DB_ChatLogMsg::remove(const string& user)\n{\n string sql = \"delete from \" + tbName;\n if (user != \"*\") {\n sql += \" where toUser='\" + user + \"' or fromUser='\" + user + \"'\";\n }\n removeBySql(sql);\n}\n//获取与当前用户有聊天记录的用户列表\nvector DB_ChatLogMsg::getUserWithChatLog()\n{\n string sql = \"select distinct toUser from \" + tbName;\n auto users = getBySql(sql);\n std::unordered_map userList;\n for (auto &elem : users) {\n userList[elem[0]];\n }\n sql = \"select distinct fromUser from \" + tbName;\n users = getBySql(sql);\n for (auto &elem : users) {\n userList[elem[0]];\n }\n userList.erase(userList.find(userName)); //删除用户列表中的自己\n //将结果保存到vector中返回\n vector res;\n res.reserve(userList.size());\n for (auto &it : userList) {\n res.push_back(it.first);\n }\n return res;\n}\n\n//获取当前用户的用户名\ninline const string& DB_ChatLogMsg::getUserName()\n{\n return userName;\n}\n\nusing std::cout;\n//可直接输出查询结果\ninline std::ostream& operator<<(std::ostream& out, const vector >& res)\n{\n if (res.size() == 0) {\n cout << \"暂无内容可显示!\" << endl;\n return out;\n }\n for (auto &it : res) { //显示提取出的离线消息内容\n for (auto &elem : it) {\n cout << elem << \" \";\n }\n cout << endl;\n }\n return out;\n}\n\n\nstring DB_Connector::host_ = \"localhost\";\nstring DB_Connector::user_ = \"root\";\nstring DB_Connector::passwd_ = \"123456\";\nstring DB_Connector::db_ = \"mfc_qq\";\n\nusing namespace std;\nint main()\n{\n DB_OfflineMsg off_msg(\"offline_msg\", \"offileMsg.log\");\n off_msg.push(\"to\", \"from\", \"hey\"); //存入一条离线消息\n auto res = off_msg.pop(\"to\"); //读取发给该用户的全部离线消息\n cout << res << endl;\n\n DB_ChatLogMsg clMsg(\"Bob\", \"chat_log_Bob.log\");\n clMsg.push(\"Miranda-lym\", \"hello\", 0);\n clMsg.push(\"Miranda-lym\", \"hi!\", 1);\n clMsg.push(\"Miranda-lym\", \"this a test case!\", 0);\n clMsg.push(\"Miranda-lym\", \"soga,I get it!\", 1);\n clMsg.push(\"John\", \"what are you doing!\", 1);\n cout << clMsg.get(\"Miranda-lym\") << endl;\n\n cout << \"find 'hi':\\n\" << clMsg.find(\"hi\") << endl;\n\n auto userList = clMsg.getUserWithChatLog();\n cout << \"users that have chated with \" < //必须在包含mysql.h之前包含windows.h\n#include \n#include \n\nint main()\n{\n char SqlText[256] = \"\"; //将用来保存要执行的SQL语句\n MYSQL *conn = NULL; //MYSQL句柄类型(任何一个mysql操作都是基于MYSQL这个句柄来操作的)\n MYSQL_RES *res = NULL; //数据查询结果集\n MYSQL_FIELD * fd = NULL; //MySQL表头域类型\n MYSQL_ROW row; //一个行数据的类型安全(type-safe)的表示\n conn = mysql_init(NULL); //初始化MYSQL连接\n char server[20] = \"localhost\"; //mysql服务器的IP\n char user[20] = \"root\"; //用户名\n char psd[20] = \"123456\"; ///密码 需要改为自己的密码\n char dbName[1024] = \"test\"; ///数据库名 需要改为自己的数据库名\n unsigned short port = 3306; //服务器端口号,默认3306\n ///建立mysql连接\n if(mysql_real_connect(conn, server, user, psd, dbName, port, NULL, 0)==0) {\n printf(\"Error connecting to database: %s\\n\", mysql_error(conn));\n } else {\n puts(\"数据库连接成功！\");\n mysql_query(conn, \"set names 'GBK'\");//设置字符集,防止中文无法正常显示[可选操作]\n ///下面开始对数据库进行操作\n const char tableName[30] = \"UserInfo\";//要操作的表名\n //插入\n sprintf(SqlText, \"insert into %s(userName,passwd) values('%s','%s')\", tableName, \"test1\", \"test1\");\n printf(\">>>执行: %s\\n\", SqlText);\n if (mysql_query(conn, SqlText) != 0) { //执行sql语句,执行成功返回0\n printf(\"Can't insert data to table: \");\n printf(\"%s\\n\", mysql_error(conn)); //获取最后一次查询失败的错误提示\n }\n //删除\n sprintf(SqlText, \"delete from %s where userName='test1'\", tableName);\n printf(\"将执行删除语句 %s, 按y/Y确认!\", SqlText);\n char c = getchar();\n if(c == 'y' || c == 'Y') {\n printf(\">>>执行: %s\\n\", SqlText);\n if (mysql_query(conn, SqlText) != 0) { //执行sql语句\n printf(\"Can't delete data from table: \");\n printf(\"%s\\n\", mysql_error(conn)); //获取最后一次查询失败的错误提示\n }\n }\n //查找\n sprintf(SqlText, \"select * from %s where type='0'\", tableName);\n if (mysql_query(conn, SqlText)==0) { //执行成功则把结果输出\n res = mysql_store_result( conn ); //存储查询得到的结果集\n printf(\">>>执行: %s\\nrecords nums:\", SqlText);\n printf(\"%u\\n\\n\", mysql_num_rows(res)); //获取搜索到的结果集的条数\n //输出数据结果各字段名,即表头被选取的部分\n while((fd = mysql_fetch_field(res)) != NULL) {\n printf(\"%-10s \", fd->name);\n }\n puts(\"\");\n //打印获取的数据\n int fieldNums = mysql_num_fields(res); //获取数据结果每条记录的列数\n while ((row = mysql_fetch_row(res)) != NULL) { //不断获取下一组结果\n for(int i = 0; i < fieldNums; i++) {\n printf(\"%-10s \", row[i]);\n }\n puts(\"\");\n }\n mysql_free_result(res); //释放结果集资源\n } else {\n printf(\"查询失败: %s\\n\", mysql_error(conn));\n }\n //修改\n sprintf(SqlText, \"update %s set passwd='passwd' where id='2'\", tableName);\n printf(\">>>执行: %s\\n\", SqlText);\n if (mysql_query(conn, SqlText) != 0) { //执行sql语句\n printf(\"Can't update data on table: \");\n printf(\"%s\\n\", mysql_error(conn)); //获取最后一次查询失败的错误提示\n }\n }\n mysql_close(conn); //关闭连接，即释放连接\n getchar();\n return 0;\n}\n" }, { "path": "MySQL环境配置.md", "content": "###最好安装32位的MySQL\n* 1.把libmysql.dll复制到C:/windows/system32/ （若是32位系统）和C:/windows/sysWOW64/ （若是64位系统）下\n\n* 2.配置好IDE：
\n（1）添加包含目录：【安装位置\\MySQL Server 5.6\\include】
\n（2）添加库目录：【安装位置\\MySQL Server 5.6\\lib】
\n（3）让IDE包含必要的链接库文件：【安装位置\\MySQL Server 5.6\\lib\\libmysql.lib】(vs中一般为‘链接器’-‘输入’-‘附加依赖项’:添加libmysql.lib)\n\n* 3.运行【安装位置\\MySQL Server 5.6\\bin】目录下的mysqld.exe，注意每次使用前都需要让这个后台运行\n" }, { "path": "README.md", "content": "# MySQL_Tools\n使用C和C++连接MySQL数据库并进行常用的数据库操作。实现了简单的学生（或职工）信息管理系统，源于大学时的数据库课程设计。\n\n如果觉得有用，欢迎大家star，同时也欢迎fork后贡献代码提交PR\n" }, { "path": "Untitled Diagram.drawio", "content": "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" }, { "path": "备用命令行代码及数据库表/stu.sql", "content": "/*\nNavicat MySQL Data Transfer\n\nSource Server : 测试1\nSource Server Version : 50616\nSource Host : localhost:3306\nSource Database : test\n\nTarget Server Type : MYSQL\nTarget Server Version : 50616\nFile Encoding : 65001\n\nDate: 2014-05-11 00:37:03\n*/\n\nSET FOREIGN_KEY_CHECKS=0;\nset names utf8;\n\n-- ----------------------------\n-- Table structure for `stu`\n-- ----------------------------\nDROP TABLE IF EXISTS `stu`;\nCREATE TABLE `stu` (\n `Sno` char(12) NOT NULL DEFAULT '',\n `Sname` char(20) DEFAULT NULL,\n `Ssex` char(2) DEFAULT NULL,\n `Sage` smallint(6) DEFAULT NULL,\n `Sdept` char(20) DEFAULT NULL,\n PRIMARY KEY (`Sno`),\n UNIQUE KEY `Sno` (`Sno`),\n UNIQUE KEY `Sno_2` (`Sno`),\n UNIQUE KEY `Sname` (`Sname`)\n) ENGINE=InnoDB DEFAULT CHARSET=utf8;\n\n-- ----------------------------\n-- Records of stu\n-- ----------------------------\nINSERT INTO `stu` VALUES ('121031325', '卫', '男', '22', '计算机学院');\nINSERT INTO `stu` VALUES ('121031329', '闻', '男', '20', '计算机学院');\nINSERT INTO `stu` VALUES ('121031323', '文', '男', '21', '计算机学院');\nINSERT INTO `stu` VALUES ('121031324', '罗', '男', '21', '计算机学院');\nINSERT INTO `stu` VALUES ('121031326', '郭王', '男', '22', '计算机学院');\n" }, { "path": "备用命令行代码及数据库表/workers.sql", "content": "drop table if exists workers;\nCREATE TABLE `workers` (\n 编号 char(12) NOT NULL,\n 姓名 char(10) DEFAULT NULL,\n 性别 char(2) DEFAULT '男' check(Wsex in('男','女')),\n 出生年月 char(8) DEFAULT NULL,\n 工作月数 int(11) DEFAULT '0' check(WworkTime>=0),\n 学历 char(10) DEFAULT NULL,\n 职务 char(20) DEFAULT NULL,\n 住址 char(30) DEFAULT NULL,\n 电话 char(12) DEFAULT NULL,\n PRIMARY KEY (编号)\n) ENGINE=InnoDB DEFAULT CHARSET=gbk;\n\nINSERT INTO `workers` VALUES ('001', '甲', '男', '1993.2', '1', '本科', '普通员工', '北京', '010-1111111');\nINSERT INTO `workers` VALUES ('002', '乙', '女', '1990.3', '16', '本科', '主管', '北京', '010-1111222');\nINSERT INTO `workers` VALUES ('003', '丙', '男', '1992.2', '1', '本科', '普通员工', '武汉', '027-1234123');\nINSERT INTO `workers` VALUES ('004', '丁', '女', '1993.1', '3', '本科', '普通员工', '武汉', '027-1234567');\n" }, { "path": "备用命令行代码及数据库表/打开mysql.bat", "content": "mysql -h localhost -u root -p php_db1 < stu.sql\npause\nselect * from stu;" }, { "path": "备用命令行代码及数据库表/打开命令行.bat", "content": "cmd.exe" }, { "path": "备用命令行代码及数据库表/打开命令行操作mysql.bat", "content": "mysql -h localhost -u root -p test\n\n\nshow databases;\nuse test;\nshow tables;\ndescribe stu;\nselect * from stu;" }, { "path": "测试连接.cpp", "content": "#include \n#include \n#include \n#include \n#pragma comment( lib, \"libmysql.lib\")\n\nint main()\n{\n/// 例子1\n puts(\"测试1...(链接)\");\n //MYSQL句柄 (任何一个mysql操作都是基于MYSQL这个句柄来操作的)\n MYSQL* link_ = mysql_init(NULL); //初始化MYSQL句柄\n //设置超时时间(链接超时时间，查询超时时间，写数据库超时时间)\n int timeout = 3; //超时时间设置为3秒\n if(link_ != NULL) {\n mysql_options(link_,MYSQL_OPT_CONNECT_TIMEOUT,(const char *)&timeout);\n //设置链接超时时间.\n mysql_options(link_,MYSQL_OPT_READ_TIMEOUT,(const char *)&timeout);\n //设置查询数据库(select)超时时间\n mysql_options(link_,MYSQL_OPT_WRITE_TIMEOUT,(const char *)&timeout);\n //设置写数据库(update,delect,insert,replace等)的超时时间。\n }\n //真正建立mysql链接\n char host_name[1024] = \"localhost\";\t\t//mysql服务器的IP\n char user_name[1024] = \"root\";\t\t\t\t//用户名\n char user_password[1024] = \"123456\";\t\t///密码\t\t需要改为自己的密码\n char server_name[1024] = \"test\";\t\t\t///数据库名\t需要改为自己的数据库名\n unsigned short host_port = 3306;\t\t\t//服务器端口\n\n if(!mysql_real_connect(link_,host_name,user_name,user_password,server_name,host_port,NULL,0)) {\n //失败处理\n int error_code = mysql_errno(link_); //获取错误码\n //针对不同的错误码error_code，还应该做不同的处理\n mysql_close(link_); //释放句柄\n printf(\"链接建立失败! :%s\\n\",mysql_error(link_));\n } else {\n puts(\"链接建立成功\");\n //链接建立成功，可以进行具体的操作(select insert delete update replace等）\n }\n/// 例子2，可以和上面一个例子分开运行\n puts(\"\\n测试2...(链接并查询)\");\n char SqlText[256] = \"\";\n MYSQL mysql;\n MYSQL_RES *res = NULL;\n MYSQL_FIELD * fd = NULL;\n MYSQL_ROW row;\n int i = 0;\n\n mysql_init( &mysql );\n\n if ( !mysql_real_connect( &mysql, \"localhost\", \"root\",\n \"123456\", \"test\", 3306, NULL, 0) ) {\n puts(\"数据库连接失败\");\n printf( \"Error connecting to database: %s\\n\",mysql_error(&mysql));\n mysql_close( &mysql );\n return FALSE;\n } else {\n puts(\"数据库连接成功\");\n mysql_query(&mysql,\"set names 'GBK'\");//设置字符集，防止中文无法正常显示\n sprintf( SqlText, \"insert into animals(name, kg) values ('chicken',6), ('dog', 4)\");\n if ( !mysql_query(&mysql, SqlText ) ) { //insert失败\n printf(\"Can't insert data to table: \");\n printf(\"%s\\n\", mysql_error(&mysql));\n mysql_close( &mysql );\n return FALSE;\n }\n sprintf( SqlText, \"select * from %s\",\"stu\");\t///stu需要改为自己的数据库中对应的表名\n //进行数据检索\n if ( !mysql_query(&mysql, SqlText )) {\n res = mysql_store_result( &mysql );\n i = (int)mysql_num_rows( res );\n printf(\"Query: %s\\n%d records found:\\n\", SqlText, i );\n //输出各字段名\n for (; fd = mysql_fetch_field(res);)\n printf(\"%-*s\\t\",50/mysql_num_fields(res), fd->name );\n puts(\"\");\n\n //打印获取的数据\n MYSQL_ROW row; //一个行数据的类型安全(type-safe)的表示\n while (row = mysql_fetch_row(res)) { //获取下一行\n for(int i=0; i\n#include \n#include //getche(),getch()\n#include \n#include \n#include \nusing namespace std;\n\nclass DB_worker {\npublic:\n DB_worker(const char* tb = \"stu\");\n ~DB_worker();\n void showMenu();\n void addRecord();\n void deleteRecord();\n void searchRecord();\n void modifyRecord();\n void sortRecord();\n void showAllRecord(int saveToFile = 0);\nprivate:\n bool executeQuery(const char*s = 0, int show = 1, const char* todo = \"select *\", int saveToFile = 0);\n bool createConnection();\n void printDateTime(FILE * fp);\nprivate:\n char column[20][30]; //存储属性名称\n FILE *fpLog; //存储日志记录\n char info[10][50]; //临时存放当前键入的属性值\n MYSQL *conn; //mysql连接\n MYSQL_RES *res; //这个结构代表返回的一个查询结果集\n int num_fields; //结果集中的列数\n char query[1024]; //查询语句\n char tableName[20]; //表名\n};\n\nint main()\n{\n system(\"color fd\");\n DB_worker workers(\"workers\");\n workers.showAllRecord();\n workers.showMenu();\n return 0;\n}\n//构造函数中连接数据库\nDB_worker::DB_worker(const char*tb)\n{\n fpLog = fopen(\"log.txt\", \"a+\");\n strcpy(tableName, tb);\n if (!createConnection()) {\n cout << \"数据库连接失败,请检查连接后重试！\" << endl;\n system(\"pause\");\n exit(-1);\n }\n}\n//释放连接和其他资源\nDB_worker::~DB_worker()\n{\n mysql_free_result(res);\n mysql_close(conn);\n fclose(fpLog);\n}\n\nvoid DB_worker::showMenu()\n{\n char c = 1;\n while (c != '0') {\n showAllRecord(1);\n for (int j = 0; j < 65; j++)\n cout << \"☆\";\n cout << endl;\n cout << \"\\t\\t\\t\\t\\t\\t\\t1.新增一名职工\\n\\t\\t\\t\\t\\t\\t\\t2.删除一名职工\\n\\t\\t\\t\\t\\t\\t\\t\"\n \"3.查找\\n\\t\\t\\t\\t\\t\\t\\t4.修改\\n\\t\\t\\t\\t\\t\\t\\t5.排序\\n\\t\\t\\t\\t\\t\\t\\t\"\n \"6.显示所有\\n\\t\\t\\t\\t\\t\\t\\t0.退出\" << endl;\n for (int j = 0; j < 65; j++)\n cout << \"☆\";\n cout << endl;\n cout << endl << \"请选择: \";\n do {\n c = getche();\n cout << \"\\r\\t\\t\\t\\r\" << c << \":\";\n switch (c) {\n case '1':\n addRecord();\n break;\n case '2':\n deleteRecord();\n break;\n case '3':\n searchRecord();\n break;\n case '4':\n modifyRecord();\n break;\n case '5':\n sortRecord();\n break;\n case '6':\n showAllRecord();\n break;\n case '0':\n break;\n default:\n cout << \"\\r输入错误，请重新输入:\";\n }\n } while (c < '0' || c > '6');\n cout << endl;\n fclose(fpLog);\n fpLog = fopen(\"log.txt\", \"a+\");\n }\n}\nvoid DB_worker::addRecord()\n{\n sprintf(query, \"insert into %s values ('\", tableName);\n cout << \"请输入 \" << column[0] << \": \";\n cin >> info[0];\n strcat(query, info[0]);\n for (int i = 1; i < num_fields; i++) {\n cout << \"请输入 \" << column[i] << \": \";\n cin >> info[i];\n strcat(query, \"','\");\n strcat(query, info[i]);\n }\n strcat(query, \"')\");\n printDateTime(fpLog);\n if (mysql_query(conn, query)) { //执行SQL语句\n printf(\"添加失败 (%s)\\n\", mysql_error(conn));\n fprintf(fpLog, \"Error: %s (%s)\\n\", query, mysql_error(conn)); //增加日志\n } else {\n puts(\"添加成功\");\n fprintf(fpLog, \"%s\\n\", query); //增加日志\n }\n}\nvoid DB_worker::deleteRecord()\n{\n char temp[128];\n cout << \"请输入需要删除的\" << column[0] << \": \";\n cin >> info[0];\n sprintf(temp, \"where %s='%s'\", column[0], info[0]);\n if (executeQuery(temp)) { //执行SQL语句\n cout << \"确定删除该元组？(1或y确认):\";\n char c = getch();\n if (c == '1' || c == 'y' || c == 'Y') {\n printDateTime(fpLog);\n if (executeQuery(temp, 1, \"delete\")) {\n puts(\"删除成功\");\n fprintf(fpLog, \"%s\\n\", query); //增加日志\n } else {\n printf(\"删除失败 (%s)\\n\", mysql_error(conn));\n fprintf(fpLog, \"Error: %s (%s)\\n\", query, mysql_error(conn)); //增加日志\n }\n } else\n cout << \"已取消删除\" << endl;\n } else {\n printDateTime(fpLog);\n puts(\"删除失败 (该元组不存在)\");\n fprintf(fpLog, \"Error: %s : 该元组不存在\\n\", query); //增加日志\n }\n}\nvoid DB_worker::searchRecord()\n{\n cout << \"请选择查找方式:\\n\";\n for (int i = 0; i < num_fields; i++)\n cout << i + 1 << \".\" << column[i] << \" \";\n char c = getch();\n if (c > 48 && c < 49 + num_fields) {\n cout << \"\\n请输入需要查找的\" << column[c - 49] << \": \";\n cin >> info[0];\n char temp[128];\n sprintf(temp, \"where %s='%s'\", column[c - 49], info[0]);\n executeQuery(temp);\n }\n}\nvoid DB_worker::modifyRecord()\n{\n cout << \"请选择需要修改元组的限制属性:\\n\";\n for (int i = 0; i < num_fields; i++)\n cout << i + 1 << \".\" << column[i] << \" \";\n char sel = getch();\n char temp[128];\n if (sel > 48 && sel < 49 + num_fields) {\n cout << \"\\r\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\r请输入限制元组的\" << column[sel - 49] << \": \";\n cin >> info[0];\n sprintf(temp, \"where %s='%s'\", column[sel - 49], info[0]);\n if (executeQuery(temp)) {\n cout << \"请选择需要修改的属性:\\n\";\n for (int i = 0; i < num_fields; i++)\n cout << i + 1 << \".\" << column[i] << \" \";\n sel = getch();\n if (sel > 48 && sel < 49 + num_fields) {\n cout << \"\\r\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\r请输入新的\" << column[sel - 49] << \": \";\n cin >> info[0];\n sprintf(query, \"update %s set %s='%s' %s\", tableName,\n column[sel - 49], info[0], temp);\n printDateTime(fpLog);\n if (mysql_query(conn, query)) { //执行SQL语句\n printf(\"修改失败 (%s)\\n\", mysql_error(conn));\n fprintf(fpLog, \"Error: %s (%s)\\n\", query, mysql_error(conn)); //增加日志\n } else {\n puts(\"修改成功\");\n fprintf(fpLog, \"%s\\n\", query); //增加日志\n }\n }\n } else\n cout << \"未搜索到可修改项，建议更改修改限制属性\" << endl;\n }\n}\nvoid DB_worker::sortRecord()\n{\n cout << \"请选择排序方式:\\n\";\n for (int i = 0; i < num_fields; i++)\n cout << i + 1 << \".\" << column[i] << \" \";\n char c = getch();\n if (c > 48 && c < 49 + num_fields) {\n char temp[128], way[5] = \"asc\";\n cout << \"\\r\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\r以\" << column[c - 49]\n << \"降序排序请按1或y,按q取消排序,其他键将按升序排序: \";\n char c2 = getch();\n cout << \"\\r\\t\\t\\t\\t\\t\\t\\t\\r按\" << column[c - 49];\n if (c2 == 'q' || c2 == 'Q') {\n cout << \"\\r\\t\\t\\t\\t\\t\\t\\t\\r已取消排序\" << endl;\n return;\n } else if (c2 == '1' || c2 == 'y' || c2 == 'Y') {\n strcpy(way, \"desc\");\n cout << \"降序排序\" << endl;\n } else\n cout << \"升序排序\" << endl;\n sprintf(temp, \"order by %s %s\", column[c - 49], way);\n if (executeQuery(temp)) {\n printDateTime(fpLog);\n fprintf(fpLog, \"%s\\n\", query);\n }\n }\n}\nvoid DB_worker::showAllRecord(int saveToFile)\n{\n executeQuery(0, 1, \"select *\", saveToFile);\n}\n//连接数据库\nbool DB_worker::createConnection()\n{\n int result = 1;\n conn = mysql_init(0); //初始化mysql，连接数据库\n //此处密码字段可以根据具体环境修改参数\n if (!mysql_real_connect(conn, \"localhost\", \"root\", \"123456\", \"test\", 0, NULL, 0)) {\n printf( \"Error connecting to database:%s\\n\", mysql_error(conn));\n result = 0;\n } else {\n printf(\"Connected successful\\n\");\n int timeout = 2; //设置查询超时时长\n if (conn != NULL) {\n //设置链接超时时间.\n mysql_options(conn, MYSQL_OPT_CONNECT_TIMEOUT, (const char *)&timeout);\n //设置查询数据库(select)超时时间\n mysql_options(conn, MYSQL_OPT_READ_TIMEOUT, (const char *)&timeout);\n //设置写数据库(update,delect,insert,replace等)的超时时间。\n mysql_options(conn, MYSQL_OPT_WRITE_TIMEOUT, (const char *)&timeout);\n }\n mysql_query(conn, \"set names 'GBK'\"); //设置字符集，防止中文无法正常显示\n //抽取表头信息并保存到column[]\n sprintf(query, \"select * from %s \", tableName);\n mysql_query(conn, query);\n res = mysql_store_result(conn);\n //必须对返回的指针进行校验，否则如果没有这个表，会导致程序崩溃！！\n //必须养成校验返回值的习惯，特别是对返回的是指针的情况\n if (res != NULL) {\n num_fields = mysql_num_fields(res);\n //获取各字段的表头名称\n for (int i = 0; i < num_fields; i++)\n strcpy(column[i], mysql_fetch_field(res)->name);\n puts(\"\");\n }\n }\n puts(\"————————————————————\\n\");\n return result;\n}\n//建立查询\nbool DB_worker::executeQuery(const char*s, int show, const char* todo, int saveToFile)\n{\n sprintf(query, \"%s from %s \", todo, tableName);\n if (s != NULL && s[0] != '\\0') // 连接上条件语句\n strcat(query, s);\n if (mysql_query(conn, query)) { //执行SQL语句\n printf(\"Query failed (%s)\\n\", mysql_error(conn));\n return 0;\n } else if (strcmp(todo, \"delete\") == 0)\n return 1;\n //获取结果集\n if (!(res = mysql_store_result(conn))) { //获得sql语句结束后返回的结果集\n printf(\"Couldn't get result from %s\\n\", mysql_error(conn));\n return 0;\n }\n //打印结果数\n int affect = mysql_affected_rows(conn);\n if (show) {\n if (!saveToFile)\n printf(\">>>职工表中————共查询到 %d 组结果<<<\\n\", affect);\n //获取字段的信息\n if (affect > 0) {\n if (saveToFile)\n freopen(\"data.txt\", \"w\", stdout);\n for (int i = 0; i < num_fields; i++)\n printf(\"%-*s\", 130 / num_fields, column[i]);\n puts(\"\");\n //打印获取的数据\n MYSQL_ROW row; //一个行数据的类型安全(type-safe)的表示\n while (row = mysql_fetch_row(res)) { //获取下一行\n for (int i = 0; i < num_fields; i++)\n printf(\"%-*s\", 130 / num_fields, row[i]);\n puts(\"\");\n }\n if (saveToFile) {\n freopen(\"CON\", \"w\", stdout);\n return true;\n }\n }\n }\n puts(\"————————————————————\\n\");\n return affect;\n}\n//在日志文件中打印当前日期和时间\nvoid DB_worker::printDateTime(FILE * fp)\n{\n time_t now_time = time(NULL);\n struct tm *newtime = localtime(&now_time);\n char tmpbuf[128];\n static int first = 1;\n if (first) {\n strftime(tmpbuf, 128, \"\\n******%Y/%m/%d******\\n\", newtime);\n fprintf(fp, tmpbuf);\n first = 0;\n }\n strftime(tmpbuf, 128, \"%H:%M:%S \", newtime);\n fprintf(fp, tmpbuf);\n}\n" }, { "path": "职工管理系统C.cpp", "content": "#include \n#include \n#include \n#include \n#include \n#include \n#include \n#include \nusing namespace std;\nchar column[20][30];\t//洢\nFILE *fplog;\nchar info[10][50];\t\t//ʱŵǰֵ\nMYSQL mysql, *sock;\t\t//mysql\nMYSQL_RES *res;\t\t\t//ṹеһѯ\nint num_fields;\t\t\t//е\nchar query[1024];\t\t//ѯ\nchar tableName[20];\t\t//\n\nbool QueryDatabase(const char*s=0,int show=1,const char* todo=\"select * \");\nbool ConnectDatabase();\nvoid printDateTime(FILE * fp);\nvoid DB(const char* tb = \"worker\");\nvoid close();\nvoid Choose();\nvoid Add();\nvoid Delete();\nvoid Search();\nvoid Modify();\nvoid Sort();\nvoid ShowAll();\n\nint main() {\n\tDB(\"workers\");\n ShowAll();\n Choose();\n close();\n return 0;\n}\n\nvoid Choose() {\n char c;\n while(c!='0') {\n cout<'6');\n cout<>info[0];\n strcat(query,info[0]);\n for(int i=1; i>info[i];\n strcat(query,\"','\");\n strcat(query,info[i]);\n }\n strcat(query,\"')\");\n printDateTime(fplog);\n if(mysql_query(sock, query)) { //ִSQL\n printf(\"ʧ (%s)\\n\",mysql_error(sock));\n fprintf(fplog,\"Error: %s (%s)\\n\",query,mysql_error(sock));\t\t//־\n } else {\n puts(\"ӳɹ\");\n fprintf(fplog,\"%s\\n\",query);\t\t//־\n }\n}\nvoid Delete() {\n char temp[128];\n cout<<\"Ҫɾ\"<>info[0];\n sprintf(temp,\"where %s='%s'\",column[0],info[0]);\n if(QueryDatabase(temp)) { //ִSQL\n cout<<\"ȷɾԪ飿(1yȷ):\";\n char c=getch();\n if(c=='1' || c=='y' || c=='Y') {\n printDateTime(fplog);\n if(QueryDatabase(temp,1,\"delete\")) {\n puts(\"ɾɹ\");\n fprintf(fplog,\"%s\\n\",query);\t\t//־\n } else {\n printf(\"ɾʧ (%s)\\n\",mysql_error(sock));\n fprintf(fplog,\"Error: %s (%s)\\n\",query,mysql_error(sock));\t\t//־\n }\n } else\n cout<<\"ȡɾ\"<48 && c<49+num_fields) {\n cout<<\"\\nҪҵ\"<>info[0];\n char temp[128];\n sprintf(temp,\"where %s='\",column[c-49]);\n strcat(temp,info[0]);\n strcat(temp,\"'\");\n QueryDatabase(temp);\n }\n}\nvoid Modify() {\n cout<<\"ѡҪ޸ĵ:\\n\";\n for(int i=0; i48 && c<49+num_fields) {\n cout<<\"\\nԵ\"<>info[0];\n sprintf(temp,\"where %s='%s'\",column[c-49],info[0]);\n if(QueryDatabase(temp)) {\n cout<<\"ѡҪ޸ĵ:\\n\";\n for(int i=0; i48 && c<49+num_fields) {\n cout<<\"\\nµ\"<>info[0];\n sprintf(query, \"update %s set %s='%s' %s\",tableName,column[c-49],info[0],temp);\n printDateTime(fplog);\n if(mysql_query(sock, query)) { //ִSQL\n printf(\"޸ʧ (%s)\\n\",mysql_error(sock));\n fprintf(fplog,\"Error: %s (%s)\\n\",query,mysql_error(sock));\t//־\n } else {\n puts(\"޸ijɹ\");\n fprintf(fplog,\"%s\\n\",query);\t//־\n }\n }\n } else\n cout<<\"δ޸޸\"<48 && c<49+num_fields) {\n char temp[128], way[5]=\"asc\";\n cout<<\"\\r\"<name);\n puts(\"\");\n }\n puts(\"\\n\");\n return result;\n}\n\n//ѯ\nbool QueryDatabase(const char*s,int show,const char* todo) {\n int result = 1;\n sprintf(query, \"%s from %s \",todo,tableName);\n if(s)\n strcat(query,s);\n if(mysql_query(sock, query)) { //ִSQL\n printf(\"Query failed (%s)\\n\",mysql_error(sock));\n return 0;\n } else if(strcmp(todo,\"delete\")==0)\n return 1;\n //ȡ\n if (!(res=mysql_store_result(sock))) { //sql󷵻صĽ\n printf(\"Couldn't get result from %s\\n\", mysql_error(sock));\n return 0;\n }\n //ӡ\n int affect = mysql_affected_rows(sock);\n if(show) {\n printf(\">>>ѯ %d <<<\\n\",affect);\n //ȡֶεϢ\n if(affect>0) {\n for(int i=0; i