jsp第九次作业

<center>
    <form action="doregist.jsp"  method="post">
           用户名:<input type="text" name="uname" value=""><br>
           密    码:
           <input type="password" name="upwd" value=""><br>
           email: <input type="text" name="email" value=""><br>
           <input type="submit"  value="注册">
           <a href="login.jsp">返回</a>
           </form>
           </center>

doregist.jsp：
<%
        request.setCharacterEncoding("utf-8");
        Users u = (Users) session.getAttribute("user");
        String uname = request.getParameter("sjr");
        String title = request.getParameter("title");
        String content = request.getParameter("zw");
        Msg msg = new Msg();
        msg.setUsernname(u.getUsername());
        msg.setSendto(uname);
        msg.setTitle(title);
        msg.setMsgcontent(content);
        MsgDao md = new MsgDao();
        md.addMail(msg);
        request.getRequestDispatcher("main.jsp").forward(request, response);
        
 %>

//注册方法insert
    public boolean addUser(Users user){
        
        Connection con=null;
        try{
            //获取连接
            con = getConnection();
            //书写SQL语句
            String sql = "insert into Usersd(username,PASSWORD,email) values(?,?,?)";
            PreparedStatement st =con.prepareStatement(sql);
            st.setString(1,user.getUsername());
            st.setString(2, user.getPassword());
            st.setString(3, user.getEmail());
            int row = st.executeUpdate();
            if(row>0){
                //发送成功
                return true;
            }
            closeAll(con, st, null);
        }catch(SQLException e){
            e.printStackTrace();
        }
        return false;
    }