Java执行ipconfig,客户端服务器
我正在制作一个程序,你在客户端键入ifconfig(Linux)或ipconfig(Windows),然后它发送到服务器并在那里执行shell 它执行正常,在服务器上我可以正确地看到ipconfig,但我不知道如何将服务器的结果返回给客户端 客户端:Java执行ipconfig,客户端服务器,java,shell,Java,Shell,我正在制作一个程序,你在客户端键入ifconfig(Linux)或ipconfig(Windows),然后它发送到服务器并在那里执行shell 它执行正常,在服务器上我可以正确地看到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; Sock
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();}
}
}
提前谢谢大家 服务器: 当您调用一个进程并从输入流中读取数据时,将收到的数据发送到输出流。现在客户端根本没有收到任何东西,所以它没有任何东西可以显示。我将使用BufferedReader(InputStreamReader)从客户端读取数据
PrintWriter out = new PrintWriter(server.getOutputStream(), true);
BufferedReader in = new BufferedReader(new InputStreamReader(server.getInputStream()));
out.println(comand);
String result;
while ((result = in.readLine()) != null )
{
System.out.println(result);
}
客户端:
只需从服务器流接收其发送的内容,例如:
PrintWriter out = new PrintWriter(server.getOutputStream(), true);
BufferedReader in = new BufferedReader(new InputStreamReader(server.getInputStream()));
out.println(comand);
String result;
while ((result = in.readLine()) != null )
{
System.out.println(result);
}
如果您不想使用任何威胁,那么每个请求都需要一个新连接,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();
}
}
}
这个答案可能会有帮助:()@drkunibar谢谢你的链接,但是没有威胁是无法做到的?只是不要在服务器端创建任何线程和进程(每次只有一个客户端)。@Benjamin但是我的代码有什么错?这正是我需要的:)谢谢你的解释。现在我明白我做错了什么:谢谢本杰明告诉我哪里错了:)