midlet3.java

这是郭克华老师的J2ME视频的源代码

package prj21_1;

import java.io.DataInputStream;

import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
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;
//送给服务器一些信息，得到响应，例如：
public class MIDlet3 extends MIDlet implements CommandListener{
	private Form frm = new Form("HTTP测试");
	private TextField tfAcc = new TextField("输入账号","",10,TextField.ANY);
	private TextField tfPass = new TextField("输入账号","",10,TextField.ANY);
	private Command cmdLogin = new Command("登陆",Command.SCREEN,1);
	
	private Display dis;

	protected void startApp() throws MIDletStateChangeException {
		dis = Display.getDisplay(this);
		dis.setCurrent(frm);
		frm.append(tfAcc);
		frm.append(tfPass);
		frm.addCommand(cmdLogin);
		frm.setCommandListener(this);		
	}
	
	public void commandAction(Command c,Displayable d){
		if(c==cmdLogin){
			ValidateTehread vt = new ValidateTehread();
			vt.start();				
		}
	}
	class ValidateTehread extends Thread{
		public void run(){
			try{
				String url = "http://localhost:9999/login.jsp?acc="+tfAcc.getString()+"&pass="+tfPass.getString();
				//连接到HTTP服务器
				HttpConnection hc = 
					(HttpConnection)Connector.open(url);		
				
				DataInputStream dis = hc.openDataInputStream();
				byte[] b = new byte[(int)hc.getLength()];
				dis.read(b);
				frm.append(new String(b));				
			}catch(Exception ex){
				ex.printStackTrace();
			}
		}
	}
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO Auto-generated method stub

	}

	protected void pauseApp() {
		// TODO Auto-generated method stub

	}


}