我正在制作一个程序,您在客户端中键入 ifconfig(Linux) 或 ipconfig(Windows),然后它发送到服务器并在那里执行 shell。
执行正常,在服务器中我可以正确看到ipconfig,但我不知道如何将服务器的结果返回给客户端。
客户端:
public class ShellClient {
public static void main(String[] args) throws IOException {
String comand;
Socket server =null;
server = new Socket("localhost", 1234);
while(true){
System.out.println("Insert ipconfig(windows)/ ifconfig(Linux): ");
@SuppressWarnings("resource")
Scanner keyboard = new Scanner(System.in);
comando = keyboard.next();
try{
System.out.println("Conecting...");
DataOutputStream out = new DataOutputStream(new BufferedOutputStream(server.getOutputStream()));
DataInputStream in = new DataInputStream(new BufferedInputStream(server.getInputStream()));
out.writeUTF(comand);
out.flush();
String result = in.readUTF();
System.out.println(result);
if (comand == "0"){server.close();
System.out.println("Finish. Thank You!");
System.exit(0);}
}catch(IOException ioe){
System.err.println(ioe);
}
}
}
}
服务器端:
public class ShellServer {
public static void main(String[] args) throws IOException {
ServerSocket socket = null;
Socket client = null;
String result;
String comand ;
String s = null;
socket = new ServerSocket(1234);
System.out.println("The server keep working...");
client = socket.accept();
System.out.println("The client is connected");
DataInputStream in = new DataInputStream(new BufferedInputStream(client.getInputStream()));
DataOutputStream out = new DataOutputStream(new BufferedOutputStream(client.getOutputStream()));
comand = in.readUTF();
result = Shell.CheckCommand(comand);
//out.writeUTF(result);
//out.flush();
// Ejcutamos el comando
Process p = Runtime.getRuntime().exec(result);
BufferedReader stdInput = new BufferedReader(new InputStreamReader(
p.getInputStream()));
while ((s = stdInput.readLine()) != null) {
System.out.println(s);
}
if(comand == "0"){client.close();
socket.close();}
}
}
提前谢谢你们!
最佳答案
如果您不想使用任何威胁,那么您需要为每个请求建立一个新连接,并且每次只能处理一个连接
试试这个
客户端
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.util.Scanner;
public class ShellClient {
public static void main(String[] args) throws IOException {
String comando;
while (true) {
System.out.println("Introduce ipconfig(windows)/ ifconfig(Linux): ");
@SuppressWarnings("resource")
Scanner keyboard = new Scanner(System.in);
comando = keyboard.next();
System.out.println("Conectando...");
// We need a new connection for every request
Socket server = new Socket("localhost", 1234);
DataOutputStream out = new DataOutputStream(new BufferedOutputStream(server.getOutputStream()));
DataInputStream in = new DataInputStream(new BufferedInputStream(server.getInputStream()));
out.writeUTF(comando);
out.flush();
// We close the output stream so the server knows we have finished the request
server.shutdownOutput();
if ("0".equals(comando)) {
System.out.println("Finalizado. Gracias!");
System.exit(0);
}
BufferedReader input = new BufferedReader(new InputStreamReader(server.getInputStream(), "UTF-8"));
String line;
while ((line = input.readLine()) != null) {
System.out.println(line);
}
// See above - we need a new connection for every request
server.close();
}
}
}
服务器
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
public class ShellServer {
public static void main(String[] args) throws IOException {
ServerSocket socket = null;
Socket client = null;
String resultado;
String comando;
String s = null;
socket = new ServerSocket(1234);
System.out.println("El servidor sigue funcionando...");
while (true) {
client = socket.accept();
System.out.println("El cliente se ha conectado");
DataInputStream in = new DataInputStream(new BufferedInputStream(client.getInputStream()));
DataOutputStream out = new DataOutputStream(new BufferedOutputStream(client.getOutputStream()));
comando = in.readUTF();
if ("0".equals(comando)) {
System.exit(0);
}
resultado = Shell.CheckCommand(comando);
// Ejcutamos el comando
Process p = Runtime.getRuntime().exec(comando);
BufferedReader stdInput = new BufferedReader(new InputStreamReader(
p.getInputStream()));
while ((s = stdInput.readLine()) != null) {
out.write(s.getBytes("UTF-8"));
out.write('\n');
// we want to see each line as fast as we can
out.flush();
System.out.println(s);
}
client.close();
}
}
}
关于Java 执行 ipconfig ,客户端-服务器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23324009/