mysql jdbc 官方编程示例

时间:2019-03-15
本文章向大家介绍mysql jdbc 官方编程示例,主要包括mysql jdbc 官方编程示例使用实例、应用技巧、基本知识点总结和需要注意事项,具有一定的参考价值,需要的朋友可以参考一下。
/*
   Basic example of an application using JDBC API of Connector/C++
*/
/* Standard C++ includes */
#include <stdlib.h>
#include <iostream>
#include <sstream>
#include <stdexcept>
/*
  Note: Boost must be in the include path to build code which uses the
  JDBC API.
*/
#include <boost/scoped_ptr.hpp>
#include <jdbc/mysql_connection.h>
#include <jdbc/mysql_driver.h>
#include <jdbc/cppconn/resultset.h>
#include <jdbc/cppconn/statement.h>
#define DEFAULT_URI "tcp://127.0.0.1"
#define EXAMPLE_USER "root"
#define EXAMPLE_PASS ""
#define EXAMPLE_DB "test"
using namespace std;
/*
  Usage example for Driver, Connection, (simple) Statement, ResultSet
*/
int main(int argc, const char **argv)
{
  const char   *url = (argc > 1 ? argv[1] : DEFAULT_URI);
  const string user(argc >= 3 ? argv[2] : EXAMPLE_USER);
  const string pass(argc >= 4 ? argv[3] : EXAMPLE_PASS);
  const string database(argc >= 5 ? argv[4] : EXAMPLE_DB);
  cout << endl;
  cout << "Connector/C++ standalone program example..." << endl;
  cout << endl;
  try {
    sql::Driver * driver = sql::mysql::get_driver_instance();
    /* Using the Driver to create a connection */
    cout << "Creating session on " << url << " ..."
         << endl << endl;
    boost::scoped_ptr< sql::Connection >
      con(driver->connect(url, user, pass));
    con->setSchema(database);
    boost::scoped_ptr< sql::Statement > stmt(con->createStatement());
    boost::scoped_ptr< sql::ResultSet >
      res(stmt->executeQuery("SELECT 'Welcome to Connector/C++' AS _message"));
    cout << "\t... running 'SELECT 'Welcome to Connector/C++' AS _message'"
         << endl;
    while (res->next())
    {
      cout << "\t... MySQL replies: " << res->getString("_message") << endl;
      cout << "\t... say it again, MySQL" << endl;
      cout << "\t....MySQL replies: " << res->getString(1) << endl;
    }
  }
  catch (sql::SQLException &e)
  {
    /*
      The JDBC API throws three different exceptions:
    - sql::MethodNotImplementedException (derived from sql::SQLException)
    - sql::InvalidArgumentException (derived from sql::SQLException)
    - sql::SQLException (derived from std::runtime_error)
    */
    cout << "# ERR: SQLException in " << __FILE__;
    cout << "(" << "EXAMPLE_FUNCTION" << ") on line " << __LINE__ << endl;
    /* Use what() (derived from std::runtime_error) to fetch the error message */
    cout << "# ERR: " << e.what();
    cout << " (MySQL error code: " << e.getErrorCode();
    cout << ", SQLState: " << e.getSQLState() << " )" << endl;
    return EXIT_FAILURE;
  }
  cout << endl;
  cout << "... find more at http://www.mysql.com" << endl;
  cout << endl;
  return EXIT_SUCCESS;
}

 

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