用J2ME实现简单电子邮件发送功能

package com.j2medev.mail;
import java.io.DataOutputStream;

import java.io.IOException;
import javax.microedition.midlet.MIDlet;

import javax.microedition.midlet.MIDletStateChangeException;

import javax.microedition.lcdui.*;

import javax.microedition.io.*;
public class MailClient extends MIDlet

{

private MainForm mainForm;

private ContentForm contentForm;

private Display display;

private Message message;

public Message getMessage()

{

return message;

}
public void setMessage(Message message)

{

this.message = message;

}
public void displayAlert(String text, AlertType type, Displayable disp)

{

Alert alert = new Alert("Application Error");

alert.setString(text);

alert.setType(type);

alert.setTimeout(2000);

display.setCurrent(alert, disp);

}


public ContentForm getContentForm()

{

return contentForm;

}
public Display getDisplay()

{

return display;

}


public MainForm getMainForm()

{

return mainForm;

}
public void initMIDlet()

{

MailThread t = new MailThread(this);

t.start();

message = new Message();

display = Display.getDisplay(this);

mainForm = new MainForm(this, "Simple Mail Client");

contentForm = new ContentForm("Content", null, 150, TextField.ANY, this);

display.setCurrent(mainForm);

}


protected void startApp() throws MIDletStateChangeException

{        

initMIDlet();

}
protected void pauseApp()

{   

}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException

{      

}

}
class MailThread extends Thread

{

private MailClient midlet;

public MailThread(MailClient midlet)

{

this.midlet = midlet;

}
public void run()

{

synchronized(midlet)

{

try

{

midlet.wait();

}

catch(Exception e)

{

e.printStackTrace();

}



}

System.out.println("connecting to server.....");

HttpConnection httpConn = null;

DataOutputStream dos = null;



try

{

httpConn = (HttpConnection)Connector.open(
"http://localhost:8088/mail/maildo");

httpConn.setRequestMethod("POST");

dos = new DataOutputStream(httpConn.openOutputStream());

dos.writeUTF(midlet.getMessage().getTo());

dos.writeUTF(midlet.getMessage().getSubject());

dos.writeUTF(midlet.getMessage().getContent());

dos.close();

httpConn.close();

System.out.println("end of sending mail");

}

catch(IOException e)

{}

}}