mysql SOCKET，PIPE，SHARED MEMORY 三种连接方式c++怎么写
tcp连接方式代码是这么写的：
sql::ConnectOptionsMap connection_properties;
connection_properties[OPT_CHARSET_NAME] = "utf8mb4";
connection_properties[OPT_HOSTNAME] = "jdbc:mysql://127.0.0.1:MYSQL1";
connection_properties[OPT_USERNAME] = strUser;
connection_properties[OPT_PASSWORD] = strPw;
connection_properties[OPT_SCHEMA] = "SurfaceSys";
connection_properties[OPT_PORT] = "3306";
//connection_properties[OPT_SET_CHARSET_DIR] = SysCommon::getCurrentPath() + "/charsets";
//connection_properties["OPT_SET_CHARSET_NAME"] = "utf8";
m_pConn = m_pDriver->connect(connection_properties);
不知道其他两种方式是怎么写
要使用 C++ 连接到 MySQL 数据库，您可以使用 MySQL Connector/C++ 库，它为 MySQL C API 提供了一个 C++ 接口。
要使用不同类型的连接（套接字、命名管道、共享内存）连接到 MySQL 服务器，您需要在对象中设置适当的连接选项sql::ConnectionOptions。
以下是如何使用每种连接类型连接到 MySQL 服务器的示例：
#include <iostream>
#include <mysqlx/xdevapi.h>
int main() {
try {
// Create connection options object
sql::ConnectionOptions connection_options;
// Set connection type to socket
connection_options.setProtocol(sql::Protocol::SOCKET);
connection_options.setHost("localhost"); // Replace with your MySQL server host
connection_options.setPort(3306); // Replace with your MySQL server port
connection_options.setUser("root"); // Replace with your MySQL server username
connection_options.setPassword("password"); // Replace with your MySQL server password
// Connect to MySQL server
sql::Driver* driver = sql::mysql::get_driver_instance();
sql::Connection* conn = driver->connect(connection_options);
std::cout << "Connected to MySQL server using socket\n";
// Close connection
conn->close();
delete conn;
// Set connection type to named pipe
connection_options.setProtocol(sql::Protocol::PIPE);
// Connect to MySQL server
conn = driver->connect(connection_options);
std::cout << "Connected to MySQL server using named pipe\n";
// Close connection
conn->close();
delete conn;
// Set connection type to shared memory
connection_options.setProtocol(sql::Protocol::SHARED_MEMORY);
// Connect to MySQL server
conn = driver->connect(connection_options);
std::cout << "Connected to MySQL server using shared memory\n";
// Close connection
conn->close();
delete conn;
}
catch (sql::SQLException& e) {
std::cerr << "SQL error: " << e.what() << std::endl;
}
catch (std::runtime_error& e) {
std::cerr << "Runtime error: " << e.what() << std::endl;
}
return 0;
}
请注意，您需要包含mysqlx/xdevapi.h头文件并将您的应用程序与mysqlcppconn8库链接。
此外，请确保将连接选项（主机、端口、用户名、密码）替换为适合您的 MySQL 服务器的值。
要windows c++ jdbc 的写法
以下答案引用自GPT-3大模型,请合理使用：
示例
1. PIPE连接方式：
sql::ConnectOptionsMap connection_properties;
connection_properties[OPT_CHARSET_NAME] = "utf8mb4";
connection_properties[OPT_HOSTNAME] = "jdbc:mysql://127.0.0.1:MYSQL1?socketFactory=com.mysql.jdbc.NamedPipeSocketFactory";
connection_properties[OPT_USERNAME] = strUser;
connection_properties[OPT_PASSWORD] = strPw;
connection_properties[OPT_SCHEMA] = "SurfaceSys";
connection_properties[OPT_PORT] = "3306";
//connection_properties[OPT_SET_CHARSET_DIR] = SysCommon::getCurrentPath() + "/charsets";
//connection_properties["OPT_SET_CHARSET_NAME"] = "utf8";
m_pConn = m_pDriver->connect(connection_properties);
2. SHARED MEMORY连接方式；
sql::ConnectOptionsMap connection_properties;
connection_properties[OPT_CHARSET_NAME] = "utf8mb4";
connection_properties[OPT_HOSTNAME] = "jdbc:mysql://127.0.0.1:MYSQL1?socketFactory=com.mysql.jdbc.SharedMemorySocketFactory";
connection_properties[OPT_USERNAME] = strUser;
connection_properties[OPT_PASSWORD] = strPw;
connection_properties[OPT_SCHEMA] = "SurfaceSys";
connection_properties[OPT_PORT] = "3306";
//connection_properties[OPT_SET_CHARSET_DIR] = SysCommon::getCurrentPath() + "/charsets";
//connection_properties["OPT_SET_CHARSET_NAME"] = "utf8";
m_pConn = m_pDriver->connect(connection_properties);
如果我的回答解决了您的问题，请采纳我的回答
SHARED MEMORY
// 创建 MySQL 连接器
Driver* driver = get_driver_instance();
// 设置连接选项
sql::ConnectOptionsMap options;
options["protocol"] = "shm";
options["userName"] = "myusername";
options["password"] = "mypassword";
options["schema"] = "mydatabase";
// 连接MySQL
Connection* conn = driver->connect(options);
PIPE
// 创建 MySQL 连接器
Driver* driver = get_driver_instance();
// 设置连接选项
sql::ConnectOptionsMap options;
options["pipe"] = "/path/to/mysql.sock";
options["userName"] = "myusername";
options["password"] = "mypassword";
options["schema"] = "mydatabase";
// 连接MySQL
Connection* conn = driver->connect(options);
在 C++ 中，可以使用 MySQL Connector/C++ 库提供的 mysqlx::Session 对象来连接 MySQL 数据库。在此对象中，有三个方法可用于实现不同类型的连接：
下面是一个使用 Unix 套接字连接 MySQL 的示例代码：
#include <mysqlx/xdevapi.h>
#include <iostream>
using namespace std;
int main() {
try {
mysqlx::Session sess("localhost", 3306, "user", "password", "schema", "/path/to/socket");
mysqlx::Schema db = sess.getSchema();
mysqlx::Table tbl = db.getTable("table_name");
mysqlx::Result res = tbl.select("*").execute();
for (mysqlx::Row row : res) {
cout << row[0] << " " << row[1] << endl;
}
} catch (const mysqlx::Error &err) {
cerr << "Error: " << err.what() << endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
其中，/path/to/socket 是 MySQL 服务器的 Unix 套接字文件路径，user、password、schema 分别是连接数据库需要的用户名、密码和数据库名。其他两种连接方式也可以按照类似的方式实现。
1.使用SOCKET连接：
#include <iostream>
#include <mysql/mysql.h>
int main() {
// 初始化数据库连接句柄
MYSQL *conn = mysql_init(NULL);
if (!conn) {
std::cerr << "Failed to initialize MySQL connection" << std::endl;
return 1;
}
// 连接MySQL数据库
if (!mysql_real_connect(conn, "localhost", "username", "password", "database", 0, "/path/to/mysql.sock", 0)) {
std::cerr << "Failed to connect to MySQL database: " << mysql_error(conn) << std::endl;
mysql_close(conn);
return 1;
}
// 执行SQL语句
if (mysql_query(conn, "SELECT * FROM table")) {
std::cerr << "Failed to execute SQL query: " << mysql_error(conn) << std::endl;
mysql_close(conn);
return 1;
}
// 处理查询结果
MYSQL_RES *result = mysql_store_result(conn);
MYSQL_ROW row;
while ((row = mysql_fetch_row(result))) {
std::cout << row[0] << "\t" << row[1] << std::endl;
}
// 释放资源
mysql_free_result(result);
mysql_close(conn);
return 0;
}
2.使用PIPE连接：
#include <iostream>
#include <mysql/mysql.h>
int main() {
// 初始化数据库连接句柄
MYSQL *conn = mysql_init(NULL);
if (!conn) {
std::cerr << "Failed to initialize MySQL connection" << std::endl;
return 1;
}
// 连接MySQL数据库
if (!mysql_real_connect(conn, "localhost", "username", "password", "database", 0, NULL, MYSQL_PROTOCOL_PIPE)) {
std::cerr << "Failed to connect to MySQL database: " << mysql_error(conn) << std::endl;
mysql_close(conn);
return 1;
}
// 执行SQL语句...
// 处理查询结果...
// 释放资源...
mysql_close(conn);
return 0;
}
3.使用SHARED MEMORY连接：
#include <iostream>
#include <mysql/mysql.h>
int main() {
// 初始化数据库连接句柄
MYSQL *conn = mysql_init(NULL);
if (!conn) {
std::cerr << "Failed to initialize MySQL connection" << std::endl;
return 1;
}
// 连接MySQL数据库
if (!mysql_real_connect(conn, "localhost", "username", "password", "database", 0, NULL, MYSQL_PROTOCOL_MEMORY)) {
std::cerr << "Failed to connect to MySQL database: " << mysql_error(conn) << std::endl;
mysql_close(conn);
return 1;
}
// 执行SQL语句...
// 处理查询结果...
// 释放资源...
mysql_close(conn);
return 0;
}
注意，在使用这些示例代码时，需要替换其中的参数，如用户名、密码、数据库名、表名等，以匹配你的MySQL数据库设置。
1、SOCKET连接：
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int sockfd;
struct sockaddr_in server;
//建立socket连接
sockfd=socket(AF_INET,SOCK_STREAM,0);
if (sockfd<0)
{
printf("Error creating socket!\n");
exit(1);
}
//设置服务器信息
bzero(&server,sizeof(server));
server.sin_family=AF_INET;
server.sin_port=htons(MySQL_PORT); //MySQL_PORT是MySQL服务器的端口，一般是3306
server.sin_addr.s_addr=inet_addr(MySQL_IP); //MySQL_IP是MySQL服务器的IP地址
//建立与服务器的连接
if (connect(sockfd,(struct sockaddr *)&server,sizeof(struct sockaddr))<0)
{
printf("Error connecting to MySQL server!\n");
exit(1);
}
2、PIPE连接：
#include <unistd.h>
int pipefd[2];
//建立pipe
if (pipe(pipefd)<0)
{
printf("Error creating pipe!\n");
exit(1);
}
//连接到MySQL服务器
if (connect(pipefd[1],MySQL_PIPE,MySQL_PIPE_LEN)<0)
{
printf("Error connecting to MySQL server!\n");
exit(1);
}
3、SHARED MEMORY连接：
#include <sys/shm.h>
int shm_id;
void *shm_ptr;
//建立共享内存
if ((shm_id=shmget(MySQL_SHM_KEY,MySQL_SHM_SIZE,0))<0)
{
printf("Error creating shared memory!\n");
exit(1);
}
//映射共享内存
if ((shm_ptr=shmat(shm_id,NULL,0))<0)
{
printf("Error mapping shared memory!\n");
exit(1);
}
//连接到MySQL服务器
if (connect(shm_ptr,MySQL_SHM_LEN)<0)
{
printf("Error connecting to MySQL server!\n");
exit(1);
}