Java连接mysql数据库以及mysql驱动jar包下载和使用方法

public class jdbcDemo01 {
    public static void main(String[] args) throws Exception {
        Statement state = null;
        Connection conn = null;
        try {
            //2.注册驱动
            Class.forName("com.mysql.cj.jdbc.Driver");
            
            //3.获取数据库连接对象
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/zqq?serverTimezone=GMT%2B8", "root", "root");
            
            //4.定义sql语句
            String sql = "update integral set stu_name='老黄666' where id = '1'";
            
            //5.获取执行sql的对象 Statement
            state = conn.createStatement();
            
            //执行sql
            int count = state.executeUpdate(sql);
            
            //7.处理结果
            System.out.println(count);
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {

            try {
                if (state!=null){
                    //8.释放资源
                    state.close();
                }
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }

            try {
                if (conn!=null){
                    conn.close();
                }
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
    }
}