Method deleteAll

ch2/DBConnectionTest2Test.java:103–110

()

    }

    private void deleteAll() throws Exception {
        Connection conn = ds.getConnection();

        String sql = "delete from user_info ";

        PreparedStatement pstmt = conn.prepareStatement(sql); // SQL Injection공격, 성능향상
        pstmt.executeUpdate(); //  insert, delete, update
    }

    // 사용자 정보를 user_info테이블에 저장하는 메서드
    public int insertUser(User user) throws Exception {