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