下面是源码，请大侠们分析分析。
registerProc.jsp














User是一个类，主要是get和set方法，就不贴了。

下面是UserManager的addUser的源码。
public synchronized boolean addUser(User user)
    {
        if (!isUserExists(user.getNickname()))
        {
            Connection conn = null;
            PreparedStatement preStatement = null;
            try
            {
                String sSql = "INSERT INTO users "
                            + "(nickname, password, question, "
                            + "answer, email, description, "
                            + "tag, forum_id) "
                            + "VALUES(?, ?, ?, ?, ?, ?, ?, ?)";
                conn = ForumDb.getConn();
                preStatement = conn.prepareStatement(sSql);
                preStatement.setString(1, user.getNickname());
                preStatement.setString(2, user.getPassword());
                preStatement.setString(3, user.getQuestion());
                preStatement.setString(4, user.getAnswer());
                preStatement.setString(5, user.getEmail());
                preStatement.setString(6, user.getDesc());
                preStatement.setString(7, user.getTag());
                preStatement.setInt(8, user.getForumId());
                preStatement.execute();
                return true;
            }
            catch (SQLException ex)
            {
                return false;
            }
            catch (ClassNotFoundException ex)
            {
                return false;
            }
            finally
            {
                try
                {
                    preStatement.close();
                    conn.close();
                }
                catch (SQLException ex)
                {
                }
            }
        }
        else
        {
            return false;
        }
    }

下面是CharSetConv的源码，主要实现字符集的转换，这里只贴出toISO()方法的源码。
/**
     * 将源字符串转换为"iso-8859-1"字符集字符串
     * @return "iso-8859-1"字符集字符串
     */
    public String toISO()
    {
        try
        {
            byte[] sourbytes = sSource.getBytes();
            return new String(sourbytes, "iso-8859-1");
        }
        catch (UnsupportedEncodingException ex)
        {
            return "";
        }
    }

    /**
     * 将源字符串转换为"iso-8859-1"字符集字符串
     * @param source 要被转换的源字符串
     * @return "iso-8859-1"字符集字符串
     */
    public String toISO(String source)
    {
        setSource(source);
        return toISO();
    }

setSource函数怎么没有看到呢？