Java 全双工服务器套接字实现,独立读写线程?
我想在同一个服务器套接字(java应用程序)上读写(从服务器到客户端随机进行)。我的客户端到服务器的写和读在循环中工作良好。在服务器上正确写入响应 但若我试图在服务器上随机编写一些命令。我没有解决办法,首先我的问题是:Java 全双工服务器套接字实现,独立读写线程?,java,sockets,jakarta-ee,client,serversocket,Java,Sockets,Jakarta Ee,Client,Serversocket,我想在同一个服务器套接字(java应用程序)上读写(从服务器到客户端随机进行)。我的客户端到服务器的写和读在循环中工作良好。在服务器上正确写入响应 但若我试图在服务器上随机编写一些命令。我没有解决办法,首先我的问题是: 服务器端是否可以在同一个套接字上向客户机ramdonly写入命令 如果可能的话,有什么建议或指示如何做吗 请给我一些指针,我可以在哪里阅读关于这个场景的材料 提前谢谢 public class ContentServerSocket extends ServerSocket {
public class ContentServerSocket extends ServerSocket {
private final static int PORT = 4444;
protected static boolean XYZGONE = false;
public static Content content;
public ContentServerSocket(xyzService service) throws IOException {
super(PORT);
while (true) {
Log.d(TAG, "Waiting for new request from client(content) ....");
new HandleRequest(accept(), service).start();
}
}
public static void xyzRunAway() {
Log.d(TAG," Content Serv er 1 ");
XYZGONE = true;
}
}
class HandleRequest extends Thread {
private final static String TAG = "ContentServerSocket:Thread for a request:";
private Socket client;
private xyzService service;
private static Context context;
HandleRequest(Socket client, SuggestionService service) {
this.client = client;
this.service = service;
context = xyzService.serviceContext();
}
public void run() {
while (true) {
try {
Log.d(TAG, " Step 1: client: Received request MSG for Check... ");
PrintWriter out = new PrintWriter(client.getOutputStream(),
true);
BufferedReader in = new BufferedReader(new InputStreamReader(
client.getInputStream(), "utf-8"));
String request = "";
String tmpLine = null;
Log.d(TAG, " Step Xyz waiting data from the client ... ");
while ((tmpLine = in.readLine()) != null) {
if (tmpLine.length() > 0) {
request += tmpLine;
//if (tmpLine.toLowerCase().contains("</contentInfo>")) {
if (tmpLine.contains("</contentInfo>")) {
Log.d(TAG, " Server : broke because of </contentInfo>");
break;
}
} else {
Log.d(TAG, " Step NULL : ");
request = "";
}
}
Log.d("Robin", " Step 2: Actual request received from the client : : " + request);
if (request.length() == 0) {
Log.d("Robin",
" client got 0 length request, thread stop!");
throw new Exception();
}
//XMLParser xmlParser = new XMLParser(new ByteArrayInputStream(
// request.getBytes("UTF-8")));
Log.d(TAG, " Step 3 : ");
RequestParser readxmlrequest = new RequestParser(request);
String requestType = readxmlrequest.parsingXmlRequestFromContent();
Log.d(TAG, " Step 4 requestType : " + requestType);
//TODO : need to get the result and pas to the out.println..
//String result = processXML(xmlParser);
String result = responseToContentRequest(readxmlrequest,requestType);//null; //TODO need to complete.
Log.d(TAG, " Step 5 result : "+result);
(((((((((())))))))))";
if (result != null && result.length() > 0) {
//oos.writeObject(result);
Log.d("Robin", " Writing response to socket ... ");
out.println(result + "\n");
out.flush();
Log.d("Robin", " Writing flush completed ");
}
if(ContentServerSocket.XYZGONE) {
Log.d(TAG," XYZGONE >>>>>>>> ");
ContentServerSocket.XYZGONE = false;
String tmp = "<ssr> OK Done .......</ssr>";
out.println(tmp + "\n");
Log.d("Content Server Socket ", "xyz:" + tmp);
out.flush();
}
} catch (IOException ioException) {
Log.d("Robin", " IOException on socket listen: " + ioException);
}
catch (Exception e) {
Log.d("Robin", " outer exception: " + e.toString());
break;
}
finally {
if (client == null || client.isClosed()
|| !client.isConnected()) {
Log.d(" Robin ", " client is null");
break;
}
}
//break;
}
Log.d("Robin", " thread stop... ");
}
公共类ContentServerSocket扩展了ServerSocket{
专用最终静态int端口=4444;
受保护的静态布尔值XYZGONE=false;
公共静态内容;
公共ContentServerSocket(xyzService服务)引发IOException{
超级(港口);
while(true){
Log.d(标记“等待来自客户端的新请求(内容)…”);
新HandleRequest(accept(),service).start();
}
}
公共静态void xyzRunAway(){
Log.d(标签“内容服务器1”);
XYZGONE=true;
}
}
类HandleRequest扩展了线程{
私有最终静态字符串TAG=“ContentServerSocket:请求线程:”;
专用套接字客户端;
专用XYZ服务;
私有静态语境;
HandlerRequest(套接字客户端、建议服务){
this.client=client;
服务=服务;
context=xyzService.serviceContext();
}
公开募捐{
while(true){
试一试{
Log.d(标记“步骤1:客户端:接收到检查请求消息…”);
PrintWriter out=新的PrintWriter(client.getOutputStream(),
正确的);
BufferedReader in=新的BufferedReader(新的InputStreamReader(
client.getInputStream(),“utf-8”);
字符串请求=”;
字符串tmpLine=null;
Log.d(标记“步骤Xyz等待来自客户端的数据…”);
而((tmpLine=in.readLine())!=null){
如果(tmpLine.length()>0){
请求+=tmpLine;
//if(tmpLine.toLowerCase()包含(“”){
if(tmpLine.contains(“”){
Log.d(标记“服务器:因为”而损坏);
打破
}
}否则{
Log.d(标记“步骤空:”);
请求=”;
}
}
Log.d(“Robin”,“步骤2:从客户端收到的实际请求::”+请求);
if(request.length()==0){
Log.d(“罗宾”,
“客户端收到0长度请求,线程停止!”);
抛出新异常();
}
//XMLParser XMLParser=new XMLParser(new ByteArrayInputStream(
//请求.getBytes(“UTF-8”);
Log.d(标记“步骤3:”);
RequestParser readxmlrequest=新的RequestParser(请求);
String requestType=readxmlrequest.parsingXmlRequestFromContent();
Log.d(标签,“步骤4请求类型:”+requestType);
//TODO:需要将结果和pas发送到out.println。。
//字符串结果=processXML(xmlParser);
字符串结果=responseToContentRequest(readxmlrequest,requestType);//null;//TODO需要完成。
Log.d(标签,“步骤5结果:”+结果);
(((((((((())))))))))";
if(result!=null&&result.length()>0){
//oos.writeObject(结果);
Log.d(“Robin”,“将响应写入套接字…”);
out.println(结果+“\n”);
out.flush();
Log.d(“Robin”,“写入刷新完成”);
}
if(ContentServerSocket.XYZGONE){
Log.d(标记“XYZGONE>>>>>>”;
ContentServerSocket.XYZGONE=false;
字符串tmp=“确定完成……”;
out.println(tmp+“\n”);
Log.d(“内容服务器套接字”,“xyz:+tmp”);
out.flush();
}
}捕获(IOException IOException){
Log.d(“Robin”,“套接字侦听上的IOException:”+IOException);
}
捕获(例外e){
Log.d(“Robin”,“外部异常:+e.toString());
打破
}
最后{
if(client==null | | client.isClosed()
||!client.isConnected()){
Log.d(“Robin”,“客户端为空”);
打破
}
}
//中断;
}
Log.d(“罗宾”,“线程停止…”);
}
是的,可以将服务器或客户端上多个线程的数据写入现有套接字。但是,您必须确保请求不重叠,并且接收方实际上知道从谁那里写入的内容
如果您使用基于行的协议,您可以将每条消息定义为一行。在这种情况下,您应该同步多个线程,以便在任何给定时刻只有一个线程在写入该行的一部分
您的代码太大,无法理解问题所在,抱歉
也许本教程有帮助?有很多:
所以,我修复了它。我只需要维护两个不同的线程。 1) 阅读。 2) 写 在上面的代码中,我只是又开始了一个线程来编写 在上述代码的运行函数中插入代码 ==================================
Runnable r1 = new Runnable() {
public void run() {
try {
while (true) {
System.out.println("Hello, world!");
if(ContentServerSocket.XYZGONE) {
Log.d(TAG," XYZGONEY >>>>>>>> ");
ContentServerSocket.XYZGONE = false;
String tmp = "<ssr> OK Done .......</ssr>";
out.println(tmp + "\n");
Log.d("Content Server Socket ", "XYZGONE :" + tmp);
out.flush();
}
Thread.sleep(1000L);
}
} catch (InterruptedException iex) {}
}
};
Thread thr1 = new Thread(r1);
if(!thr1.isAlive())thr1.start();