connectthread.java

手机获取网页源代码

/*
 * connectThread.java
 *
 * Created on 2006年9月6日, 上午12:17
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package com.j2me.networld.connection;

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

/**
 *
 * @author DONGHOME
 */
public class ConnectThread
        implements CommandListener, Runnable
{
    private NWC_MIDlet midlet = null;
    private Form form = null;
    private String url = null;
    private HttpConnection hc = null;
    private InputStream is = null;
    private static final int LENGTH = 256;
    private static final Command backCmd = new Command("Back", Command.BACK, 1);
    private static final Command exitCmd = new Command("Exit", Command.EXIT, 0);

    /** Creates a new instance of connectThread */
    public ConnectThread(NWC_MIDlet midlet, String url)
    {
        this.midlet = midlet;
        this.url = url;
        form = new Form(this.url);
        form.addCommand(backCmd);
        form.addCommand(exitCmd);
        form.setCommandListener(this);
    }

    public void run()
    {
        try
        {
            ProgressUI progress = new ProgressUI("Connecting networld...");
            progress.init();
            midlet.setCurrent(progress);
            hc = (HttpConnection)Connector.open(this.url);
            int code = hc.getResponseCode();
            int connectLength = (int)hc.getLength();
            if(code != HttpConnection.HTTP_OK)
            {
                form.append("Server is not responding!");
                midlet.setCurrent(form);
                return;
            }
            is = hc.openInputStream();
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            byte[] buffer = new byte[LENGTH];
            int length = 0;
            int readLength = 0;
            while((length = is.read(buffer, 0, buffer.length)) != -1)
            {
                readLength = readLength + length;
                progress.onProgress(readLength * 100 / connectLength);
                baos.write(buffer, 0, length);
            }
            byte[] data = baos.toByteArray();
            String message = new String(data, 0, data.length);
            form.append(message);
        }
        catch(Exception e)
        {
            form.append(new StringItem("Exception: ", e.toString()));
        }
        finally
        {
            if(is != null)
            {
                try
                {
                    is.close();
                }
                catch(IOException ioe)
                {
                    ioe.printStackTrace();
                }
            }
            if(hc != null)
            {
                try
                {
                    hc.close();
                }
                catch(IOException ioe)
                {
                    ioe.printStackTrace();
                }
            }
            midlet.setCurrent(form);
        }
    }

    public void commandAction(Command cmd, Displayable dis)
    {
        if(cmd == backCmd)
        {
            midlet.setCurrent(new MainUI(this.midlet));
        }
        else if(cmd == exitCmd)
        {
            midlet.exitApp();
        }
    }
}