关于socket：如何判断连接超时？
public class Server extends Thread
你应该在2022年开始加密货币投资吗？ <
ServerSocket serverSocket;
public Server()
<
try
<
serverSocket=new ServerSocket(1001);
System.out.println(serverSocket.toString());
>
catch(IOException e)
<
fail("could not start server",e);
>
System.out.println("server srarted. ");
this.start();
>
public static void fail(String str,Exception err)
<
System.out.println(str+" . "+err);
System.exit(1);
>
public void run()
<
try
<
while(true)
<
Socket clientSocket=serverSocket.accept();
MyConnection con=new MyConnection(clientSocket);
>
>
catch(IOException 你应该在2022年开始加密货币投资吗？ e)
<
fail("not listening",e);
>
public static void main(String args[])
<
new Server();
>
class MyConnection extends Thread
<
protected Socket netClient=null;
protected BufferedReader fromClient=null;
protected PrintStream toClient=null;
protected String login=null,password=null,fromMessage=null,toMessage=null;
protected Date date=new Date();
protected GregorianCalendar calendar=new GregorianCalendar();
protected RandomAccessFile logFile;
public MyConnection(Socket clientSocket)
<
netClient=clientSocket;
try
<
fromClient=new BufferedReader(new InputStreamReader(netClient.getInputStream()));
toClient=new PrintStream(netClient.getOutputStream());
logFile=new RandomAccessFile("log.txt","rw");
>
catch(IOException e)
<
try
<
netClient.close();
>
catch(IOException err)
<
System.err.println("Unable to set up stream "+err);
return;
>
>
this.start();
public void writeFile(String entry)
<
try
<
logFile.seek(logFile.length());
logFile.writeBytes(entry);
>
catch(IOException e)
<
System.out.println("can not write on to the log file"+e);
>
>
public boolean userLogin()
<
try
<
while(true)
<
toClient.println("Login:");
login=fromClient.readLine();
if (login==null)
<
toClient.println("error,user name can not be null,login again or enter exit quit talking");
continue;
>
else if(login.equals("exit"))
<
System.out.println("default user quiting. ");
return false;
>
else
<
while(true)
<
toClient.println("Password:");
password=fromClient.readLine();
if(password==null)
<
System.out.println("password error");
continue;
>
else
<
System.out.println(login+" logged in. ");
writeFile(login+" logged in. "+"\n");
calendar.setTime(date);
String strTime="on date "
+calendar.get(Calendar.YEAR)+"-"
+calendar.get(Calendar.MONTH)+"-"
+calendar.get(Calendar.DATE)+" "
+"at time "
+calendar.get(Calendar.HOUR)+":"
+calendar.get(Calendar.MINUTE)+":"
+calendar.get(Calendar.SECOND)+". ";
System.out.println(strTime);
writeFile(strTime+"\n");
System.out.println(login+"'s password is "+password);
writeFile(login+"'s password is "+password+"\n");
public void run()
try
<
boolean userlogin=userLogin();
BufferedReader stdin=new BufferedReader(new InputStreamReader((System.in)));
toMessage=": hi,"+login;
for(;userlogin;)
<
toClient.println("from zjyserver "+toMessage);
writeFile("from zjyserver "+toMessage+"\n");
String fromMessage=fromClient.readLine();
if(fromMessage.equals("exit"))
<
System.out.println(login+" exiting. ");
writeFile(login+" exiting. "你应该在2022年开始加密货币投资吗？ +"\n");
break;
>
else
<
System.out.println("from "+login+" "+fromMessage);
writeFile("from "+login+" "+fromMessage+"\n");
toMessage=stdin.readLine();
calendar.setTime(date);
String strTime="at("
+calendar.get(Calendar.YEAR)+"-"
+calendar.get(Calendar.MONTH)+"-"
+calendar.get(Calendar.DATE)+" "
+calendar.get(Calendar.HOUR)+":"
+calendar.get(Calendar.MINUTE)+":"
+calendar.get(Calendar.SECOND)+"): ";
toMessage=strTime+toMessage;
>
>
Simple Sidebar
The starting state of the menu will appear collapsed on smaller screens, and will appear non-collapsed on larger screens. When toggled using the button below, the menu will change.
Make sure to keep all page content within the #page-content-wrapper . The top navbar is optional, and just for demonstration. Just create an element with the #sidebarToggle ID which will 你应该在2022年开始加密货币投资吗？ toggle the menu when clicked.
你应该在2022年开始加密货币投资吗？
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Simple Sidebar
The starting state of the menu will appear collapsed on smaller screens, and will appear non-collapsed on larger screens. When toggled using the button below, the menu will change.
Make sure 你应该在2022年开始加密货币投资吗？ to keep all page content within the #page-content-wrapper . The top navbar is optional, and just for demonstration. Just create an element with the #sidebarToggle ID which will toggle the menu when clicked.