Java TCP客户机-服务器程序的问题
下面是我的服务器程序Java TCP客户机-服务器程序的问题,java,sockets,tcp,Java,Sockets,Tcp,下面是我的服务器程序 import java.io.*; import java.net.*; class TwoWayServer { public static void main(String argv[]) throws Exception { ServerSocket server_socket = new ServerSocket(1234); while(true) { Socket
import java.io.*;
import java.net.*;
class TwoWayServer
{
public static void main(String argv[]) throws Exception
{
ServerSocket server_socket = new ServerSocket(1234);
while(true)
{
Socket listen_socket = server_socket.accept();
BufferedReader client_input = new BufferedReader(new InputStreamReader(listen_socket.getInputStream()));
DataOutputStream dos = new DataOutputStream(listen_socket.getOutputStream());
String client_str = client_input.readLine();
System.out.println(client_str);
String st=client_str.toUpperCase();
dos.writeBytes(st);
}
}
}
我的客户程序如下:
import java.io.*;
import java.net.*;
class TwoWayClient
{
public static void main(String argv[]) throws Exception
{
BufferedReader user_input = new BufferedReader( new InputStreamReader(System.in));
Socket socket = new Socket("localhost", 1234);
DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
BufferedReader server_response = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String client_str = user_input.readLine();
dos.writeBytes(client_str + '\n');
String response = server_response.readLine();
System.out.println("FROM SERVER: " + response);
socket.close();
}
}
这里,如果我从客户端提供一个字符串,那么服务器将返回字符串的大写形式。但问题是,一旦我提供了字符串,我就不会从服务器得到任何响应。
请提供帮助。问题在于服务器没有使用换行符将字节写入服务器,请尝试替换
dos.writeBytes(st)代码>
与
您可以尝试对代码进行这些修改
服务器:
import java.io.*;
import java.net.*;
class TwoWayServer
{
public static void main(String argv[]) throws Exception
{
ServerSocket server_socket = new ServerSocket(1234);
while(true)
{
Socket listen_socket = server_socket.accept();
BufferedReader client_input = new BufferedReader(new InputStreamReader(listen_socket.getInputStream()));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(listen_socket.getOutputStream()));
String client_str = client_input.readLine();
System.out.println(client_str);
String st=client_str.toUpperCase();
bw.write(st + '\n');
bw.flush();
}
}
}
客户:
import java.io.*;
import java.net.*;
class TwoWayClient
{
public static void main(String argv[]) throws Exception
{
BufferedReader user_input = new BufferedReader( new InputStreamReader(System.in));
Socket socket = new Socket("localhost", 1234);
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
BufferedReader server_response = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String client_str = user_input.readLine();
bw.write(client_str + '\n');
bw.flush();
String response = server_response.readLine();
System.out.println("FROM SERVER: " + response);
socket.close();
}
}
看到编辑过的代码,我在复制粘贴代码时有点困惑,反正他理解,对吧?
import java.io.*;
import java.net.*;
class TwoWayClient
{
public static void main(String argv[]) throws Exception
{
BufferedReader user_input = new BufferedReader( new InputStreamReader(System.in));
Socket socket = new Socket("localhost", 1234);
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
BufferedReader server_response = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String client_str = user_input.readLine();
bw.write(client_str + '\n');
bw.flush();
String response = server_response.readLine();
System.out.println("FROM SERVER: " + response);
socket.close();
}
}