关于java:JDBC使用JDBCUtils工具类执行查询操作

// 查问表test_01中的所有数据public class JDBCUtilsSelectTest {    public static void main(String[] args) throws SQLException {        // 1。获取连贯        Connection conn = JDBCUtils.getConnection();        // 2。获取语句执行平台，即Statement对象        Statement sqlExecute = JDBCUtils.createStatement(conn);        // 3。执行sql语句        String sql = "select * from test_01;";        ResultSet resultSet = sqlExecute.executeQuery(sql);        // 4。处理结果集        while(resultSet.next()){            int id = resultSet.getInt("id");            String name = resultSet.getString("name");            int age = resultSet.getInt("age");            System.out.println("id = " + id + ", name = " + name + ", age = " + age);        }        // 5。敞开对象        JDBCUtils.close(conn,sqlExecute,resultSet);    }}