1 1、 设备请求分发服务器，分发服务器返回有效的socket服务器ip与port，然后断开连接。2 a) 设备与服务器建立连接。3 b) 服务器接收到连接请求后，立即将分配好的socket服务器ip与port信息响应给设备。4 c) 服务器主动断开socket连接。5 2、 设备得到ip与port以后，设备去连接socket服务器，然后与其进行协议通讯。6 a) 设备连接到socket服务器。7 b) socket服务器响应连接成功响应信息。8 c) 设备与socket服务器保持长链接通讯。9

10 *. 若设备未收到连接成功响应则再次尝试连接，若三次请求依旧没有成功建立连接，那么设备需要去请求分发服务器然后再重新上述操作。11 *. 当设备在异常情况下链接不上socket服务器时，依旧尝试三次若不能成功，则直接请求分发服务器，然后再重复上述操作。12

13 分发服务器代码：14 分发服务与客户端是短链接：15 packagecom.easygo.server;16

17 importjava.io.IOException;18 importjava.net.ServerSocket;19 importjava.net.Socket;20 importjava.util.concurrent.ExecutorService;21 importjava.util.concurrent.Executors;22

23 public class CenterServer implementsRunnable{24 ServerSocket serverSocket=null;25 static volatile String server_ip="127.0.0.1";26 static volatile int serverport1=8085;27 static volatile int serverport2=8086;28 public static voidmain(String[] args) {29 new Thread(newCenterServer()).start();30

31 }32

33 @Override34 public voidrun() {35 ExecutorService cachedThreadPool = null;//线程池

36 cachedThreadPool = Executors.newCachedThreadPool();//线程池

37 try{38 serverSocket=new ServerSocket(9999);39 } catch(IOException e1) {40 //TODO Auto-generated catch block

41 e1.printStackTrace();42 }43 while(true){44 try{45

46 cachedThreadPool.execute(newServerRun(serverSocket.accept()));47 System.out.println("有一个客户端连进来了..");48 } catch(IOException e) {49 //TODO Auto-generated catch block

50 e.printStackTrace();51 }52

53 }54 }55

56

57

58 }59 class ServerRun implementsRunnable{60 Socket socket=null;61 ServerRun(Socket socket){62 this.socket=socket;63

64 }65 @Override66 public voidrun() {67

68 receive();69

70

71 }72 public voidsend(String message){73 try{74 socket.getOutputStream().write(message.getBytes());75 socket.getOutputStream().flush();76 } catch(IOException e) {77 //TODO Auto-generated catch block

78 e.printStackTrace();79 }80

81

82 }83 public voidreceive(){84

85 byte[]tmp=null;86 String message=null;87

88 boolean runs=true;89 while(runs){90 if(null!=socket){91 tmp=new byte[30];92

93 @SuppressWarnings("unused")94 int count =0;95 try{96 while((count=socket.getInputStream().read(tmp))!=-1){97 message=newString(tmp);98 System.out.println("Clent:"+message.trim());99 if(message.trim().split(",")[0].equals("login")&&message.trim().split(",")[1].equals("1")){100

101 send("login,"+CenterServer.server_ip+","+CenterServer.serverport1);102 }else if(message.trim().split(",")[0].equals("login")&&message.trim().split(",")[1].equals("2")){103

104 send("login,"+CenterServer.server_ip+","+CenterServer.serverport2);105 }else if(message.equals("0")){106 if(socket!=null){107 socket.close();108

109 }110

111

112 }113 if(socket.isClosed()){114 runs=false;115 }116 tmp=null;117 message=null;118 tmp=new byte[30];119 }120

121

122 } catch(IOException e) {123

124 }125

126 }127

128

129 }130 }131

132 }133

134

135

136 客户端代码案例：137

138 packagecom.easygo.server;139

140

141 importjava.io.IOException;142 importjava.net.Socket;143

144

145 public class Client implementsRunnable{146 Socket socket=null;147 final int CENTER_SERVER_PORT=9999;//分发服务器端口

148 final String CENTER_SERVER_IP="127.0.0.1";149 intCENTER_SERVER_PORTS;150 String CENTER_SERVER_IPS;151 boolean conn=false;152 volatile booleanreceive;153 public static voidmain(String[] args) {154 new Thread(newClient()).start();155 }156

157 @Override158 public voidrun() {159 try{160 connection();161 } catch(Exception e) {162 //TODO Auto-generated catch block

163 e.printStackTrace();164 }165

166

167 }168

169 public void connection() throwsException{170

171 while(true){172 if(null==socket&&conn==false){//登入分发服务器

173 socket=newSocket(CENTER_SERVER_IP, CENTER_SERVER_PORT);174 receive=true;175

176 send("login,1");//login,登入分发服务器，1指定登入服务

177

178

179 newThread(){180 public voidrun(){181 try{182 receiveX();183 } catch(IOException e) {184 //TODO Auto-generated catch block

185 e.printStackTrace();186 }187

188 }189

190 }.start();191 }else if(null==socket&&conn==true){//登入指定服务

192 socket=newSocket(CENTER_SERVER_IPS, CENTER_SERVER_PORTS);193 receive=true;194 newThread(){195 @Override196 public voidrun(){197 while(true){198 send("message,我是客户端");199

200 try{201 Thread.sleep(1000);202 } catch(InterruptedException e) {203 //TODO Auto-generated catch block

204 e.printStackTrace();205 }206 }207

208

209 }210

211 }.start();212 newThread(){213 public voidrun(){214 try{215 receiveX();216 } catch(IOException e) {217 //TODO Auto-generated catch block

218 e.printStackTrace();219 }220

221 }222

223 }.start();224 }225

226 Thread.sleep(1000);227

228 }229 }230

231 public voidsend(String message){232 System.out.println("send:"+message);233 try{234 socket.getOutputStream().write(message.getBytes());235 socket.getOutputStream().flush();236 } catch(IOException e) {237

238 }239

240 }241

242 public void receiveX() throwsIOException{243 byte[]tmp=null;244 String messaage=null;245 while(receive){246 if(null!=socket){247 tmp=new byte[50];248 @SuppressWarnings("unused")249 int count=0;250 while((count=socket.getInputStream().read(tmp))!=-1){251 messaage=newString(tmp);252 System.out.println("result:"+messaage);253 if(messaage.trim().contains("login")){254 String[]arr=messaage.trim().split(",");255 System.out.println(":"+arr[1]+":"+arr[2]);256 CENTER_SERVER_IPS=arr[1];257 CENTER_SERVER_PORTS=Integer.parseInt(arr[2]);258

259

260 conn=true;261 //send("0");

262 closeXX();//获取到对应服务ip和端口后断开连接

263 receive=false;//264

265

266 }else if(messaage.trim().contains("message")){267 send(messaage);268

269 }270 tmp=null;271 tmp=new byte[50];272 }273

274

275

276

277 }278 tmp=null;279 messaage=null;280 }281

282 }283 public voidcloseXX(){284 if(this.socket!=null){285 try{286 socket.close();287 socket=null;288 } catch(IOException e) {289 //TODO Auto-generated catch block

290 e.printStackTrace();291 }292

293 }294 }295 }296

297

298 指定登入处理客户端服务代码299 packagecom.easygo.server;300

301 importjava.io.IOException;302 importjava.net.ServerSocket;303 importjava.net.Socket;304 importjava.util.concurrent.ExecutorService;305 importjava.util.concurrent.Executors;306

307 public class Server implementsRunnable{308 volatile int port=8086;309 ServerSocket serverSocket=null;310 public static voidmain(String[] args) {311 new Thread(newServer()).start();312 }313

314 @Override315 public voidrun() {316 int count=0;317 try{318 serverSocket=newServerSocket(port);319 ExecutorService cachedThreadPool = null;//线程池

320 cachedThreadPool = Executors.newCachedThreadPool();//线程池

321

322 while(true){323 cachedThreadPool.execute(newServerRunS(serverSocket.accept()));324 System.out.println("a client conn:"+count++);325

326 }327 } catch(IOException e) {328 //TODO Auto-generated catch block

329 e.printStackTrace();330 }331

332 }333

334 }335 class ServerRunS implementsRunnable{336 Socket socket=null;337 ServerRunS(Socket socket){338

339 this.socket=socket;340 }341 @Override342 public voidrun() {343 byte[]tmp=null;344

345 while(true){346

347 if(socket!=null){348 tmp=new byte[30];349 @SuppressWarnings("unused")350 int count=0;351 try{352 while((count=socket.getInputStream().read(tmp))!=-1){353 System.out.println("客户端发来的消息："+newString(tmp));354

355 }356 } catch(IOException e) {357 //TODO Auto-generated catch block

358 e.printStackTrace();359 }360

361 }362 tmp=null;363 }364 }365

366

367

368 }369

370 流程：371 1启动server372 2启动CenterServer服务373 3启动客户端一，参数(login,1)374 4启动客户端二，参数(login,2)375

376 运行结果：377 客户端1378 send:login,1

379 result:login,127.0.0.1,8085

380 send:message,我是客户端381 send:message,我是客户端382 send:message,我是客户端383 send:message,我是客户端384 send:message,我是客户端385 send:message,我是客户端386

387 客户端2388 send:login,2

389 result:login,127.0.0.1,8086

390 send:message,我是客户端391 send:message,我是客户端392 send:message,我是客户端393 send:message,我是客户端394 send:message,我是客户端395 send:message,我是客户端396

397 分发服务器：398 有一个客户端连进来了399 UUlogin,2

400 有一个客户端连进来了401 UUlogin,1

402

403 服务器1(8085端口)404 8085

405 客户端发来的消息：message,我是客户端406 客户端发来的消息：message,我是客户端407 .408 .409 .410 服务器1(8086端口)411 8086

412 客户端发来的消息：message,我是客户端413 客户端发来的消息：message,我是客户端414 .415 .416 .