midlet_servlet.rar_midlet-servlet

import javax.microedition.midlet.*; import javax.microedition.lcdui.*; import javax.microedition.io.*; import java.io.*; import java.util.*; public class Midlet extends MIDlet implements CommandListener ,Runnable{ Display display; String tf1Str,tf2Str; TextField tf1,tf2; Form scen,inputForm,returnForm; Command cmdSend,cmdBack,cmdExit,con; String defaultURL; String query=null; public Midlet(){ tf1=new TextField(" 学号", "", 10, TextField.NUMERIC); tf2=new TextField(" 密码", "", 10, TextField.PASSWORD); con=new Command("进入",Command.SCREEN, 1); cmdExit=new Command("退出", Command.EXIT, 0); cmdSend=new Command("确认", Command.SCREEN, 1); cmdBack=new Command("返回", Command.SCREEN, 1); Ticker tk=new Ticker("欢迎使用学生成绩查询系统"); scen=new Form(" 众志成城 战胜灾难"); inputForm=new Form(" 用户登陆"); try{ Image img=Image.createImage("/1.png"); Image img2=Image.createImage("/3.jpg"); inputForm.append(img); scen.append(img2); }catch(IOException e){ System.out.println("图象加载出错 : "+e.getMessage());} inputForm.append(" "); inputForm.append(tf1); inputForm.append(tf2); inputForm.setTicker(tk); scen.addCommand(cmdExit); scen.addCommand(con); inputForm.addCommand(cmdExit); inputForm.addCommand(cmdSend); inputForm.setCommandListener(this); scen.setCommandListener(this); } public void startApp() throws MIDletStateChangeException { display=Display.getDisplay(this); display.setCurrent(scen); } public void pauseApp(){} public void destroyApp(boolean unconditional){ notifyDestroyed(); } public void commandAction(Command c,Displayable d){ if(c==cmdExit){destroyApp(true);} if(c==con){display.setCurrent(inputForm);} if(c==cmdBack){display.setCurrent(inputForm);} if(c==cmdSend){ query=""; defaultURL="http://localhost:8080/ServletApp"; tf1Str=tf1.getString(); tf2Str=tf2.getString(); query="num="+tf1Str+"&"+"code="+tf2Str; defaultURL+="?"+query; try{ Thread t=new Thread(this); t.start(); System.out.println("线程运行正常吗 ： " +t.isAlive()); System.out.println("手机传递给SERVLET的查询参数为："+tf1Str+"\n"); } catch(Exception e) {System.out.println(e.getMessage());} } } public void run(){ try{ invokeServlet(defaultURL); }catch(Exception ee){ ee.printStackTrace();} } public void invokeServlet(String url) throws IOException{ HttpConnection hc=null; DataInputStream dis=null; StringBuffer sb=null; try{ hc=(HttpConnection) Connector.open(url,Connector.READ_WRITE); hc.setRequestMethod(HttpConnection.GET); hc.setRequestProperty("User-Agent", "Profile/MIDP-1.0 Configuration/CLDC-1.0"); hc.setRequestProperty("Content-Language", "en-CA"); hc.setRequestProperty("Content-Type", "application/GBK"); dis= (DataInputStream) hc.openDataInputStream(); try { int ch; sb=new StringBuffer(); while((ch=dis.read())!=-1) { sb.append((char)ch); } } catch(EOFException e) {//如果此输入流在读取所有字节之前到达末尾 System.out.println("str is null,exit!---" +e.getMessage()); } System.out.println("手机接收到SERVLET传来的查询结果为："+sb.toString()+"\n"); String str=new String(sb.toString().getBytes("ISO8859_1"),"gb2312"); System.out.println("转换后的查询结果为 ："+str); returnForm=new Form("以下是您查询的结果"); Ticker tik=new Ticker("书山有路勤为径"); returnForm.setTicker(tik); if(str.equals("false")){ str="\n"+" 对不起，您输入的密码或用户名有误"+" "+"请核对后重新输入"; } returnForm.append(str); returnForm.addCommand(cmdBack); returnForm.setCommandListener(this); } finally{ if (dis!=null){dis.close(); } if(hc!=null){hc.close(); } display.setCurrent(returnForm); } } }