InputMismatchException mit scanner.nextInt() über Buchse

Question

Server

import java.net.ServerSocket; 
import java.net.Socket; 
import java.util.Scanner; 

public class ServerLNS extends Thread { 

final static int porta=8888; 



public static void main(String[] args) 
{ 


    try 
    { 

     new ServerLNS().startServer(); //start server 

    } 

    catch (Exception ex) 
    { 
     System.out.println("Problema con Input/Output " + ex.getMessage());// 
    } 
} 

public void startServer() throws Exception 
{ 
    Scanner sc; 

    ServerSocket serverSocket=null; 
    Socket socket = null; 
    boolean ascoltando=true; 
    boolean b=true; 
    serverSocket = new ServerSocket(porta);//avvia il server con il numero di porta 
    // ****** interfaccia f=new interfaccia); 

     while(ascoltando) 
     { 

      socket = serverSocket.accept(); 

      new handlerClient(socket).start();//metodo ereditato dai thread che fa partire run e gestisce il client sul socket 
      //socket è la connessione virtuale tra un computer e un altro (INDIRIZZO) 

     } 

    //serverSocket.close(); 


} 

} 

Griff

package server; 

    import java.io.BufferedInputStream; 
    import java.io.BufferedReader; 
    import java.io.BufferedWriter; 
    import java.io.DataInputStream; 
    import java.io.FileOutputStream; 
    import java.io.IOException; 
    import java.io.InputStreamReader; 
    import java.io.OutputStreamWriter; 
    import java.io.PrintWriter; 
    import java.net.ServerSocket; 
    import java.net.Socket; 
import java.util.Scanner; 
    import java.util.logging.Level; 
    import java.util.logging.Logger; 


public class handlerClient extends Thread 
{ 

Socket _socket; 
String name = ""; 
String ok="OK"; 
Scanner sc; 
public handlerClient(Socket socket) throws IOException 
{ 
_socket=socket; 
} 
@Override 
public void run() //parte ill thread quando viene eseguito {(.start) in ServerLNS} 

{ 
    try //parte ill thread quando viene eseguito {(.start) in ServerLNS} 
    { 
     sc=new Scanner(_socket.getInputStream()); 
     FileOutputStream fout; 
     BufferedInputStream bis=null; 
     BufferedReader br1=null; 
     br1=new BufferedReader(new InputStreamReader(_socket.getInputStream())); 
     bis=new BufferedInputStream(_socket.getInputStream()); 
     String filename; 
     String nome_cartella; 
     filename=br1.readLine(); 
     nome_cartella=br1.readLine(); 

     System.out.println(filename); 
     fout=new FileOutputStream(nome_cartella+"/"+filename); 



     int size=sc.nextInt(); 
     System.out.println("file created"); 
     int ch=bis.read(); 
     System.out.println(ch); 
     System.out.println("after bis.read()"); 

     while(size>0) 
     { 
      fout.write(ch); 
      System.out.println(ch); 
      ch=bis.read(); 
      size--; 
     } 

     System.out.println(ch); 
     System.out.println("data written"); 
     PrintWriter pw1=new PrintWriter(_socket.getOutputStream(),true); 
     pw1.println("DATA UPLOADED SUCCESSFULLY"); 
    } catch (IOException ex) { 
     sc.nextInt(); 
     Logger.getLogger(handlerClient.class.getName()).log(Level.SEVERE, null, ex); 
    } 
     } 
} 

Client

package clientprova; 

    import java.io.BufferedInputStream; 
    import java.io.BufferedOutputStream; 
    import java.io.BufferedReader; 
    import java.io.DataOutputStream; 
    import java.io.File; 
    import java.io.FileInputStream; 
    import java.io.FileNotFoundException; 
    import java.io.IOException; 
    import java.io.InputStreamReader; 
    import java.io.PrintWriter; 
    import java.net.InetAddress; 
    import java.net.Socket; 


    public class ClientProva { 
    final static int porta=8888;//porta server dove si collegano i client 

/** 
* @param args the command line arguments 
*/ 
public static void main(String[] args) throws FileNotFoundException, IOException { 
    // TODO code application logic here 

int i; 
BufferedInputStream bis; 
BufferedOutputStream bos; 
PrintWriter pw; 
BufferedReader br; 
File file = new File("Selezione_012.png"); 


InetAddress host = InetAddress.getLocalHost(); 
Socket sock = new Socket(host.getHostName(), 8888); 

bis=new BufferedInputStream(new FileInputStream(file)); 
     bos=new BufferedOutputStream(sock.getOutputStream()); 
     pw=new PrintWriter(sock.getOutputStream(),true); 
     br=new BufferedReader(new InputStreamReader(sock.getInputStream())); 
     pw.println(file.getName()); 
     pw.println("prova"); 

    int ch=bis.read(); 
    int counter=0; 
    pw.println(file.length()); 

    while(counter<file.length()) 
    { 
     bos.write(ch); 
     System.out.println(ch); 
     ch=bis.read(); 
     counter++; 
    } 

    System.out.println(ch); 
    bos.write(ch); 
    bos.flush(); 
    // pw.flush(); 
    } 


} 

sorry für die zu viel Code ich ein Problem mit dieser Linie haben in HANDLE, mit Fehler inputMismatchException, aber das passiert aber nicht, wenn ich den Client mit einem Basisserver ohne Multiclient verwende - Thread-Management, um zu testen Ich rief boolean b = sc.hasNextInt vor sc.nextInt int size =() Wenn Multiclient mir falsch gibt, verstehe ich das Problem nicht. Vielen Dank im Voraus

 fout=new FileOutputStream(nome_cartella+"/"+filename); 



     int size=sc.nextInt();<----------------------------------- 
     System.out.println("file created"); 

dieser Server arbeitet, das gleiche des ersten Servers ist aber in diesem Server Socket ist nicht als Parameter an den Thread gegeben, kann dies beeinflussen?

import java.io.BufferedInputStream; 
    import java.io.BufferedReader; 
    import java.io.DataInputStream; 
    import java.io.FileOutputStream; 
    import java.io.IOException; 
    import java.io.InputStreamReader; 
    import java.io.PrintWriter; 
    import java.net.ServerSocket; 
    import java.net.Socket; 
    import java.util.Scanner; 


    public class ServerProva { 

final static int porta=8888;//porta server dove si collegano i client 

public static void main(String[] args) throws IOException { 

    ServerSocket serverSocket=null; 

    boolean ascoltando=true; 
    boolean b=true; 
    serverSocket = new ServerSocket(porta);//avvia il server con il numero di porta 
    Socket s; 
    BufferedReader br1=null; 
    // ****** interfaccia f=new interfaccia); 
     String filename; 
     String nome_cartella; 
     boolean r=true; 
     BufferedInputStream bis=null; 
     Scanner sc; 
    FileOutputStream fout; 

    while(ascoltando) 
     { 

     s=serverSocket.accept();<--------------// this socket 


    br1=new BufferedReader(new InputStreamReader(s.getInputStream())); 
    bis=new BufferedInputStream(s.getInputStream()); 
     filename=br1.readLine(); 
     nome_cartella=br1.readLine(); 

      System.out.println(filename); 
      fout=new FileOutputStream(nome_cartella+"/"+filename); 
      sc=new Scanner(s.getInputStream()); 
      System.out.println(sc); 

      int size=sc.nextInt(); 
      System.out.println("file created"); 
      int ch=bis.read(); 
      System.out.println(ch); 
      System.out.println("after bis.read()"); 

      while(size>0) 
      { 
       fout.write(ch); 
       System.out.println(ch); 
       ch=bis.read(); 
       size--; 
      } 

      System.out.println(ch); 
      System.out.println("data written"); 
      PrintWriter pw1=new PrintWriter(s.getOutputStream(),true); 
      pw1.println("DATA UPLOADED SUCCESSFULLY"); 
     } 

    serverSocket.close(); 
} 

}

Answer 1

File.length() kehrt long, so dass Sie long size = sc.nextLong() stattdessen tun sollten.