JDBC 使用SimpleJdbcTemplate实现Dao

public interface UserDao {
    public void addUser(User user);

    public User getUser(int userId);

    public User findUser(String loginName, String password);

    public void update(User user);

    public void delete(User user);

}

 

 

 

 

public class UserDaoSpringImpl implements UserDao {
    private SimpleJdbcTemplate simpleJdbcTemplate = new SimpleJdbcTemplate(
            JdbcUtils.getDataSource());

    public void addUser(User user) {
        String sql = "insert into user (name, money, birthday) values (:name, :money, :birthday)";
        SqlParameterSource param = new BeanPropertySqlParameterSource(user);
        KeyHolder keyHolder = new GeneratedKeyHolder();
        this.simpleJdbcTemplate.getNamedParameterJdbcOperations().update(sql,
                param, keyHolder);
        user.setId(keyHolder.getKey().intValue());
    }

    public void delete(User user) {
        String sql = "delete from user where id=?";
        this.simpleJdbcTemplate.update(sql, user.getId());
    }

    public User findUser(String loginName, String password) {
        String sql = "select id, name, money, birthday  from user where name=?";
        return this.simpleJdbcTemplate.queryForObject(sql,
                ParameterizedBeanPropertyRowMapper.newInstance(User.class),
                loginName);
    }

    public User getUser(int userId) {
        String sql = "select id, name, money, birthday  from user where id=?";
        return this.simpleJdbcTemplate.queryForObject(sql,
                ParameterizedBeanPropertyRowMapper.newInstance(User.class),
                userId);
    }

    public void update(User user) {
        String sql = "update user set name=?, birthday=?, money=? where id=? ";
        this.simpleJdbcTemplate.update(sql, user.getName(), user.getBirthday(),
                user.getMoney(), user.getId());

        sql = "update user set name=:name, birthday=:birthday, money=:money where id=:id ";
        this.simpleJdbcTemplate.update(sql, new BeanPropertySqlParameterSource(
                user));
    }

}