连接Oracle数据库

            package
             Util;


            import
             java.sql.Connection;

            import
             java.sql.DriverManager;

            import
             java.sql.PreparedStatement;

            import
             java.sql.ResultSet;

            import
             java.sql.SQLException;


            public
            class
             DBUtil {
    
            public
            static
            void
             main  (String args[]){
        
            try
             {
            Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
        } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {
            // TODO Auto-generated catch block            e.printStackTrace();
        }
        String user = "system";
        String password = "密码";
        String url = "jdbc:oracle:thin:@localhost:1521:orcl";
        Connection connection = null;
        try {
            
             connection = DriverManager.getConnection(url,user,password);
             System.out.println("连接成功");
        } catch (SQLException e) {
            
            System.out.println("连接失败");
            e.printStackTrace();
        }
        
        
    }
    publicstaticvoid close(Connection connection ) {
        try {
            if (connection != null) {
                connection.close();
            }
            
        } catch (SQLException e) {
            // TODO Auto-generated catch block            e.printStackTrace();
        }
    }
    publicstaticvoid close(PreparedStatement preparedStatement ) {
        try {
            if (preparedStatement != null) {
                preparedStatement.close();
            }
            
        } catch (SQLException e) {
            // TODO Auto-generated catch block            e.printStackTrace();
        }
    }
    publicstaticvoid close(ResultSet resultSet ) {
        try {
            if (resultSet != null) {
                resultSet.close();
            }
            
        } catch (SQLException e) {
            // TODO Auto-generated catch block            e.printStackTrace();
        }
    }
    


}