如何让Java TCP服务器和客户端应用程序循环，直到发出一定数量的请求
如何让Java TCP服务器和客户端应用程序循环，直到发出一定数量的请求
提问于 2018-09-16 01:28:15
我已经用eclipse编写了TCP服务器和TCP客户端应用程序。客户端获取字符串形式的用户输入，然后将其发送到服务器，服务器将其大写，然后再将其发回。它们需要保持循环，直到服务器收到一定数量的请求，在这种情况下，它关闭套接字之间的连接并停止。不幸的是，它似乎只循环一次。我将在代码之后提供我正在讨论的内容的示例输出。
import java.io.*;
import java.net.*;
public class TCPServer {
public static void main(String argv[]) throws Exception {
String clientSentence;
String capitalizedSentence;
ServerSocket welcomeSocket = new ServerSocket(6789);
int requests = 0;
while (true) {
Socket connectionSocket = welcomeSocket.accept();
BufferedReader inFromClient = new BufferedReader (new InputStreamReader( connectionSocket.getInputStream()));
DataOutputStream outToClient = new DataOutputStream (connectionSocket.getOutputStream());
do {
clientSentence = inFromClient.readLine();
capitalizedSentence = clientSentence.toUpperCase() + '\n';
outToClient.writeBytes(capitalizedSentence);
outToClient.flush();
requests++;
}
while(requests < 10);
outToClient.writeBytes("REQUEST LIMIT REACHED");
}
}
}和客户端
import java.io.*;
import java.net.*;
public class TCPClient {
public static void main(String argv[]) throws Exception {
String sentence;
String modifiedSentence;
BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
//Creates socket, replace the hostnmae/ip address with the ipaddress of the computer running the server application.
Socket clientSocket = new Socket("10.69.88.130", 6789);
DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
BufferedReader inFromServer = new BufferedReader(new InputStreamReader (clientSocket.getInputStream()));
do {
System.out.print("TO SERVER: ");
sentence = inFromUser.readLine();
outToServer.writeBytes(sentence + '\n');
outToServer.flush();
modifiedSentence = inFromServer.readLine();
System.out.println("FROM SERVER: " + modifiedSentence);
}
while (!modifiedSentence.equals("REQUEST LIMIT REACHED"));
System.out.println(modifiedSentence);
clientSocket.close();
}
}最后，我得到的输出
TO SERVER: testa
FROM SERVER: TESTA
TO SERVER: testb
(nothing else is displayed after this line)回答 1
Stack Overflow用户
发布于 2018-09-16 02:43:49
好的，你的代码正在工作(某种程度上)。运行成功后，无需重启服务器即可重启客户端。您的request-value不会重置为0，并且在重新启动客户端后，您的客户端为您的服务器发出的第一个请求是10。那么，为什么会有这样的请求呢？因为你先冲洗绳子然后再检查你的计数器。
我对你的服务器做了一点修改。也许这就是你要找的？
import java.io.*;
import java.net.*;
public class TCPServer {
public static void main(String argv[]) throws Exception {
String clientSentence;
String capitalizedSentence;
ServerSocket welcomeSocket = new ServerSocket(6789);
int requests = 0;
while (true) {
Socket connectionSocket = welcomeSocket.accept();
BufferedReader inFromClient = new BufferedReader (new InputStreamReader( connectionSocket.getInputStream()));
DataOutputStream outToClient = new DataOutputStream (connectionSocket.getOutputStream());
while (requests < 10) {
clientSentence = inFromClient.readLine();
capitalizedSentence = clientSentence.toUpperCase();
outToClient.writeBytes(capitalizedSentence + " Request: " + requests + '\n');
outToClient.flush();
requests++;
}
outToClient.writeBytes("REQUEST LIMIT REACHED");
requests = 0;
}
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/52347176
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