欢迎进入IT技术社区论坛，与200万技术人员互动交流 >>进入 5、在无线应用网络连接术语中有呼叫建立延迟(Call Setup latency)和通话信号传输延迟(Intra-call latency)两种，从以上数据可以看出，第一种延迟要比后一种延迟要明显一些，即第一次连接时用户需要
欢迎进入IT技术社区论坛，与200万技术人员互动交流 >>进入
5、在无线应用网络连接术语中有呼叫建立延迟(Call Setup latency)和通话信号传输延迟(Intra-call latency)两种，从以上数据可以看出，第一种延迟要比后一种延迟要明显一些，即第一次连接时用户需要等待更多的时间；
以下是本文的代码片断：
| public class Game extends MIDlet implements CommandListener { private Display display; private Form fmHTTP; private Form fmHTTP2; private Form fmStream; private Form fmSocket; private Command cmdTest = new Command("测试", Command.BACK, 0); private Command cmdStream = new Command("STREAM", Command.ITEM, 1); private Command cmdSocket = new Command("SOCKET", Command.ITEM, 2); private Command cmdHTTP = new Command("HTTP", Command.ITEM, 3); private TestThread testThread; public Game() { display = Display.getDisplay(this); fmHTTP = new Form("1.HTTP测试"); fmHTTP.addCommand(cmdStream); fmHTTP.addCommand(cmdSocket); fmHTTP.addCommand(cmdHTTP2); fmHTTP.addCommand(cmdExit); fmHTTP.setCommandListener(this); fmHTTP.append("HTTP协议网络测试工具用于检测手机是否具备HTTP网络连接能力。第一行数据是由服务器产生的，经过UTF编码和DES加密传输到手机上的。\n"); fmStream = new Form("3.STREAM测试"); fmStream.addCommand(cmdHTTP); fmStream.addCommand(cmdHTTP2); fmStream.addCommand(cmdSocket); fmStream.setCommandListener(this); fmStream.append("STREAM网络连接是走的socket端口，对应的服务器端口是10000。\n"); testThread = new TestThread(getAppProperty("Server").toLowerCase().trim()); } class TestThread implements Runnable { private String server; private String message; private Form curForm; private int responseCode; private InputStream is2; private HttpConnection conHttp; private String keyOptimize; private HttpConnection conOptimize; public TestThread(String server) { this.server = server; } public void start(Form curForm) { this.curForm = curForm; Thread t = new Thread(this); t.start(); } public void run() { message = ""; long start,timeused; int formid = Integer.parseInt(curForm.getTitle().substring(0,1)); start = System.currentTimeMillis(); //网络用时测试起点 if (formid==1) { //1.HTTP测试 try { String key = genPassword(); //产生8位的随机字符串密码，用于返回给服务器进行DES加密 conHttp = (HttpConnection) Connector.open("http://" + server + ":8080/ns/hellodes?r=" + key); responseCode = conHttp.getResponseCode(); if (responseCode==HttpConnection.HTTP_OK){ InputStream is = conHttp.openInputStream(); int len = (int) conHttp.getLength(); byte[] bytestr = new byte[len]; is.read(bytestr); //直接从输入流中读取字节， cipher = new DesCipher(key.getBytes()); for (int i = 0; i < bytestr.length / 8; i++) { cipher.decrypt(bytestr, i * 8, bytestr, i * 8); //解密； } message = gbDecode(new String(bytestr)); //解码 is.close(); is = null; }else{ message = "服务器无法连接！" + responseCode; } } catch (Exception e) { message = e.getMessage(); } } else if (formid==3) { //3.STREAM测试 try { conStream = (StreamConnection) Connector.open("socket://" + server + ":10000", Connector.READ_WRITE); InputStream is = conStream.openInputStream(); byte[] outs = new byte[20]; int len = 0, ch; while ((ch = is.read()) != -1) { outs[len] = (byte) ch; len++; } byte[] bytestr = new byte[len]; System.arraycopy(outs, 0, bytestr, 0, len); message = gbDecode(new String(bytestr)); is.close(); is = null; } catch (Exception e) { message = e.getMessage(); } } else if (formid==4) { //SOCKET测试 /* try { sck = (SocketConnection)Connector.open("socket://"+server+":10009",Connector.READ_WRITE); sck.setSocketOption(SocketConnection.LINGER,5); dis = sck.openDataInputStream(); message = dis.readUTF(); dis.close(); sck.close(); dis = null; sck = null; } catch (Exception e) { message = e.getMessage(); } */ message = "SOCKET连接只能在MIDP2.0中使用"; } timeused = System.currentTimeMillis() - start; curForm.append(message+"\n"); message = "网络用时 " + timeused / 1000 + "." + timeused % 1000 + "\n"; curForm.append(new StringItem(null,message)); //HTTP连接结果为1.6-1.9秒之间 } private String alpha = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; private String genPassword() { StringBuffer tmpstr = new StringBuffer(8); int iRandNum; Random rnd = new Random(); for (int i = 0; i < 8; i++) { iRandNum = Math.abs(rnd.nextInt()) % 62; tmpstr.append(alpha.substring(iRandNum, iRandNum + 1)); } return tmpstr.toString(); } private String gbDecode(final String dataStr) { int start = 0; int end = 0; final StringBuffer buffer = new StringBuffer(); while (start > -1) { end = dataStr.indexOf("\\u", start + 2); String charStr = ""; if (end == -1) { charStr = dataStr.substring(start + 2, dataStr.length()); } else { charStr = dataStr.substring(start + 2, end); } char letter = (char) Integer.parseInt(charStr, 16); // 16进制parse整形字符串。 buffer.append(new Character(letter).toString()); start = end; } return buffer.toString(); } } |
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