J2ME下载并读取服务器txt文件
J2ME下载并读取服务器txt文件，我用的公司的服务器，大家如果测试代码需要修改为自己的url，本实例是将服务器的txt文件内容添加到TextField显示，当然也可以保存到RMS中，代码如下：

package com.mopietek;

import java.io.DataInputStream;
import java.io.IOException;

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;

public class LoadTextMidlet extends MIDlet implements Runnable,CommandListener{

	
	private Display display;
	private Thread textThread;
	
	private Form mainForm,textForm;
	
	private TextField textField;
	
	public final static Command exitCommand = new Command("退出",Command.EXIT,1);
	
	public LoadTextMidlet() {
		
	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {

	}

	protected void pauseApp() {

	}

	protected void startApp() throws MIDletStateChangeException {

		display = Display.getDisplay(this);
		mainForm = new Form("主窗口");
		textForm = new Form("文本窗口");
		textField = new TextField("call me 邪道少年","hello",1024,TextField.ANY);
		textForm.addCommand(exitCommand);
		textForm.setCommandListener(this);
		display.setCurrent(mainForm);
		
	    textThread = new Thread(this);
	    textThread.start();
		
	}

	public void run(){
		
		String URL = "http://dev.mopietek.net:8080/waptest03/down/wap.txt";
		String text = loadText(URL); //获取服务器文本
		textField.setString(text);
		textForm.append(textField);
		display.setCurrent(textForm);
		
	}

	
	public String loadText(String url){
		
		HttpConnection hpc = null;
		DataInputStream dis = null;
		
		try{
			hpc = (HttpConnection) Connector.open(url);
			int length = (int) hpc.getLength();
			byte[]data = new byte[length];
			
			dis = new DataInputStream(hpc.openInputStream());
			
			dis.readFully(data);
			
			return new String(data);
			
		}catch(Exception e){
			e.printStackTrace();
			return null;
		}finally{
			
			if(hpc != null)
				try {
					hpc.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			if(dis != null)
				try {
					dis.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
		}
		
	}
	
	
	
	
	public void commandAction(Command c, Displayable arg1) {

		if(c==exitCommand){
			this.notifyDestroyed();
		}
	}
	
	
	

}

wap.txt内容如下：

Jerry is test the server