1.dbutils有介面ResultSetHandler而且dbutils提供了針對不同的結果實現類

QueryRunner runner=new QueryRunner(datasource);
runner.query(sql,new BeanHandler<User>(User.class));
//返回list集合

2.JdbcTemplate實現查詢，有介面RowMapper
JdbcTemplate針對這個介面沒有提供實現類，得到不同型別資料需要自己進行資料封裝(需要繼承rowMapper介面寫實現類)

public void testObject() {
        DriverManagerDataSource dataSource = new
 
 DriverManagerDataSource();
//獲得DataSource  物件  

dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/spring");
        dataSource.setUsername("root");
        dataSource.setPassword("shujuku");

        JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource);
        String sql = "select *from user where username=?"
 
;
        User user=jdbcTemplate.queryForObject(sql, new MyRowMapper(), "tom");
        //利用MyRowMapper()方法返回user物件

    System.out.println(user);
    }
//通過內部類，繼承RowMapper介面再進行資料封裝
class MyRowMapper implements RowMapper<User> {

    @Override
    public User mapRow(ResultSet rs, int num) throws SQLException {
        String username = rs.getString("username"
 
);
        String password = rs.getString("password");
        User user=new User();
        user.setUsername(username);
        user.setPassword(password);
        return user;
    }