public boolean doRemove(Integer id) throws Exception {
		boolean flag = false;
		String sql = "DELETE FROM privilege WHERE pid=?";
		this.pstmt = this.conn.prepareStatement(sql);
		this.pstmt.setInt(1, id);
		if (this.pstmt.executeUpdate() > 0) {
			flag = true;
		}
		return flag;
	}