[英]Java client-server chat (server not receiving string)
嘗試制作一個簡單的客戶端服務器聊天程序。 我已經去過了,以便服務器讀取用戶輸入,然后將其發送到客戶端。 客戶端然后接收並顯示它。 然后,我讓客戶端讀取用戶輸入並將其發送到服務器,但是服務器未收到它。 這是我的代碼:
客戶:
import java.lang.*;
import java.io.*;
import java.net.*;
import java.util.Scanner;
class client {
public static void main(String args[]) {
try {
Socket skt = new Socket("localhost", 1234);
BufferedReader in = new BufferedReader(new
InputStreamReader(skt.getInputStream()));
System.out.print("Waiting for server to respond... \n");
while (!in.ready()) {}
System.out.print("Received Message: ");
System.out.println(in.readLine()); // Read one line and output it
System.out.print("\n");
//in.close();
System.out.print("Message:");
Scanner sc = new Scanner (System.in);
String data2 = sc.nextLine();
PrintWriter out = new PrintWriter(skt.getOutputStream(), true);
System.out.print("Sending Message: '" + data2 + "'\n");
out.print(data2);
out.close();
}
catch(Exception e) {
System.out.print("Whoops! It didn't work!\n");
}
}
}
服務器:
import java.lang.*;
import java.io.*;
import java.net.*;
import java.util.Scanner;
class server {
public static void main(String args[]) {
try {
System.out.println("Waiting for client connection...");
ServerSocket srvr = new ServerSocket(1234);
Socket skt = srvr.accept();
System.out.println("Client has connected!\n");
System.out.print("Message:");
Scanner sc = new Scanner (System.in);
String data = sc.nextLine();
PrintWriter out = new PrintWriter(skt.getOutputStream(), true);
System.out.print("Sending Message: '" + data + "'\n");
out.print(data);
BufferedReader in = new BufferedReader(new
InputStreamReader(skt.getInputStream()));
while (!in.ready()) {out.close();}
System.out.print("Received Message: ");
System.out.println(in.readLine()); // Read one line and output it
System.out.print("\n");
//in.close();
//in.close();
//out.close();
//skt.close();
//srvr.close();
}
catch(Exception e) {
System.out.print("Whoops! It didn't work!\n");
}
}
}
客戶端和服務器都使用相同的代碼進行發送/接收,所以我不明白為什么服務器無法接收。
干杯,
湯姆
print()發送文本,但不發送新行。 請嘗試使用println()。
服務器上的readLine()等待不發送的新行。
順便說一句:我不會測試in.ready()
這比有用的恕我直言更容易造成混淆。
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