jdbc（1）
Class.forName(“com.mysql.cj.jdbc.Driver”);
Connection conn = DriverManager.getConnection(“jdbc:mysql://localhost:3306/stu ?serverTimezone=UTC”, “root”, “123456”);
String sql=“update account set balance = 500 where id = 1”;
Statement stmt = conn.createStatement();
int count = stmt.executeUpdate(sql);
System.out.println(count);
stmt.close();
conn.close();
和inset undate ResultSet的联系