Method deleteUser

ch4/UserDaoImpl.java:20–35

(String id)

    DataSource ds;

    @Override
    public int deleteUser(String id) throws Exception {
        int rowCnt = 0;
        String sql = "DELETE FROM user_info WHERE id= ? ";

        try (  // try-with-resources - since jdk7
            Connection conn = ds.getConnection();
            PreparedStatement pstmt = conn.prepareStatement(sql);
        ){
            pstmt.setString(1, id);
            return pstmt.executeUpdate(); //  insert, delete, update
//      } catch (Exception e) {
//          e.printStackTrace();
//          throw e;
        }
    }

    @Override
    public User selectUser(String id) throws Exception {