Spring JDBC的使用方法详解

 private JdbcTemplate jdbcTemplate;
  public void setDataSource(DataSource dataSource){
    this.jdbcTemplate=new JdbcTemplate(dataSource);
}　

<bean id="userDao" class="com.test.jdbc.dao.impl.UserDaoImpl">
    <property name="dataSource" ref="dataSource"/>
</bean>

public class UserDaoImpl extends JdbcDaoSupport implements IUserDao {

  public void save(User user) {
    super.getJdbcTemplate().update("insert into user(id,username,password,date,salary) values(null,?,?,?,?)",
        user.getUsername(),user.getPassword(),user.getDate(),user.getSalary());

  }

  public void update(User user) {
    super.getJdbcTemplate().update("update user set username=?,password=?,date=?,salary=? where id=?",
        user.getUsername(), user.getPassword(), user.getDate(), user.getSalary(), user.getId());

  }

  public void delete(Integer id) {
    super.getJdbcTemplate().update("delete from user where id=?",id);
  }

  public User findById(Integer id) {
    /* List<User> user = super.getJdbcTemplate().query("select * from user where id=?", new Object[]{id},
        new RowMapper<User>() {
          @Override
          public User mapRow(ResultSet resultSet, int i) throws SQLException {
            User user = new User();
            user.setId(resultSet.getInt("id"));
            user.setDate(resultSet.getDate("date"));
            user.setUsername(resultSet.getString("username"));
            user.setPassword(resultSet.getString("password"));
            user.setSalary(resultSet.getBigDecimal("salary"));
            return user;
          }
          //方法的返回值会直接封装到集合中
        });
    return user.size()>0?user.get(0):null;*/

    User user = super.getJdbcTemplate().queryForObject("select * from user where id=?", new Object[]{id},
        new RowMapper<User>() {
          @Override
          public User mapRow(ResultSet resultSet, int i) throws SQLException {
            User user = new User();
            user.setId(resultSet.getInt("id"));
            user.setDate(resultSet.getDate("date"));
            user.setUsername(resultSet.getString("username"));
            user.setPassword(resultSet.getString("password"));
            user.setSalary(resultSet.getBigDecimal("salary"));
            return user;
          }
        });
    return user;
  }

  public List<User> findAll() {
    List<User> users = super.getJdbcTemplate().query("select * from user",
        new RowMapper<User>() {
          @Override
          public User mapRow(ResultSet resultSet, int i) throws SQLException {
            User user = new User();
            user.setId(resultSet.getInt("id"));
            user.setDate(resultSet.getDate("date"));
            user.setUsername(resultSet.getString("username"));
            user.setPassword(resultSet.getString("password"));
            user.setSalary(resultSet.getBigDecimal("salary"));
            return user;
          }
          //方法的返回值会直接封装到集合中
        });
    return users;
  }

}