parseurl.java~2~

java手机程序开发随书光盘源代码

import javax.microedition.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.*;

public class ParseURL extends MIDlet implements CommandListener{

	Display display;
	Form result;
	TextBox inputURL;
	Command exitCmd;
	Command parseCmd;
	Command okCmd;
	String defaultURL = "http://nokia.judaweb.com/pdf/MIDPProgrammingv0_9.pdf";

	public ParseURL(){
		display = Display.getDisplay(this);
		inputURL = new TextBox("输入URL", defaultURL, 100, TextField.URL);
		result = new Form("解析结果");
		exitCmd = new Command("退出", Command.EXIT, 1);
		parseCmd = new Command("解析", Command.SCREEN, 1);
		okCmd = new Command("返回", Command.OK, 1);
		inputURL.addCommand(exitCmd);
		inputURL.addCommand(parseCmd);
		inputURL.setCommandListener(this);
		result.addCommand(okCmd);
		result.setCommandListener(this);
	}

	public void startApp(){
		display.setCurrent(inputURL);
	}

	public void pauseApp(){
	}

	public void destroyApp(boolean conditional){
	}

	public void commandAction(Command c, Displayable d){
		if( c == exitCmd){
			destroyApp(true);
			notifyDestroyed();
		}
		else if (c == parseCmd){
			try{
				parse(inputURL.getString());
				display.setCurrent(result);
			}
			catch(Exception ex){}
		}
		else if(c == okCmd){
			display.setCurrent(inputURL);
		}
	}

	void parse(String url) throws IOException{

		HttpConnection con = (HttpConnection)Connector.open(url);
		String protocol = "protocol:"+con.getProtocol();
		result.append(protocol);
		String host = "host:"+con.getHost();
		result.append(host);
		String port = "port:"+con.getPort();
		result.append(port);
		String fileName = "file:"+con.getFile();
		result.append(fileName);
		String query = "query:"+con.getQuery();
		result.append(query);
		String ref = "ref:"+con.getRef();
		result.append(ref);

	}

}