J2ME联网中采用序列化机制[2]

            } catch (IOException e)
            {
                e.printStackTrace();
            }
        }
服务器端收到客户端传送过来的Stream后，处理起来更简单，调用Account.deserialize(dis)就可以得到account对象了。
    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException
    {
        int length = request.getContentLength();
        System.out.println(length);
        DataInputStream dis = new DataInputStream(request.getInputStream());
        Account myAccount = Account.deserialize(dis);
        System.out.println(myAccount.toString());
    }

    我们下面做个简单的MIDlet，目的是收集用户填写的注册信息然后发送给服务器。界面如下所示：

代码如下所示：

package com.j2medev.mingjava;

import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.ChoiceGroup;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import java.io.*;
import javax.microedition.io.*;

public class NetworkMIDlet extends MIDlet implements CommandListener
{

    private Display display;
    private Form mainForm;
    private TextField userName;
    private TextField email;
    private TextField age;
    private ChoiceGroup gender;
    private NetworkThread nt;

    public static final Command connectCommand = new Command("Connect",
            Command.ITEM, 2);
    public static final Command exitCommand = new Command("Exit", Command.EXIT,
            1);
    public static final String URL = "http://localhost:8088/net/myservlet";

    protected void startApp() throws MIDletStateChangeException
    {
   
        initMIDlet();       

    }
   
    private void initMIDlet()
    {
        display = Display.getDisplay(this);
        mainForm = new Form("个人信息");
        userName = new TextField("姓名",null,20,TextField.ANY);
        email = new TextField("电子信箱",null,25,TextField.EMAILADDR);
        age = new TextField("年龄",null,20,TextField.ANY);
        gender = new ChoiceGroup("性别",Choice.EXCLUSIVE);
        gender.append("男",null);
        gender.append("女",null);
        mainForm.append(userName);
        mainForm.append(email);
        mainForm.append(age);
        mainForm.append(gender);
        mainForm.addCommand(connectCommand);
        mainForm.addCommand(exitCommand);
        mainForm.setCommandListener(this);
        display.setCurrent(mainForm);
        nt = new NetworkThread(this);
        nt.start();
    }