在控制台中打印下载的文件

Question

我有一个简单的http客户端服务器。这里的客户端可以从服务器上下载。从我的代码客户端可以下载文件。这基本上意味着从服务器文件夹中的文件成功传输到客户端。我想要做的是在控制台中显示下载的文件。我的问题是我如何修改我的代码，也显示出控制台收到的文件。

我的服务器：

public class Fileagent extends Thread 
     { 
      Socket client; 

      DataInputStream din; 
      DataOutputStream dout; 
      ServerSocket soc; 
      PrintWriter w; 
      BufferedReader r; 
public Fileagent(Socket soc) 
     { 
       try 
     { 
       client=soc;  
       din=new DataInputStream(client.getInputStream()); 
       dout=new DataOutputStream(client.getOutputStream()); 
       w = new PrintWriter(client.getOutputStream(), true); 
       r= new BufferedReader(new InputStreamReader(client.getInputStream())); 
       BufferedReader con = new BufferedReader(new InputStreamReader(System.in)); 

      start(); 

     } .................. 





      public void upload() throws Exception 
     { 


      String file=din.readUTF(); 
      File f=new File(file); 
      System.out.println("\nThe client requested to download the file"+" "+f); 
      boolean exsists=check(f); 

      if (exsists==false){ 
       System.out.println("File not found in server"); 
       out.writeUTF("ERROR");//if not found sends an ERROR message 
      return; 
      } 
     else 
      { 
      dout.writeUTF("FOUND");//if found in server sends a FOUND message. 

      FileInputStream fin=new FileInputStream(f); 
      int ch; 
      //reads and sends the file 
     do 
     { 
      ch=fin.read(); 
      dout.writeUTF(String.valueOf(ch)); 
     } 
     while(ch!=-1); 
     fin.close(); 
      dout.writeUTF("File Receive Successfully"); 
     } 
     } 


     public Boolean check(File file){ 

     if(file.exists()) 
     { 
      return true; 
     } 
      else 
     { 

     return false; 
     } 
     } 

客户端代码下载：

    public void download(Socket s) throws Exception{ 


     DataInputStream din=new DataInputStream(s.getInputStream()); 
      DataOutputStream dout=new DataOutputStream(s.getOutputStream()); 
     BufferedReader r = new BufferedReader(new InputStreamReader(s.getInputStream())); 
      BufferedReader con = new BufferedReader(new InputStreamReader(System.in)); 
      PrintWriter w = new PrintWriter(s.getOutputStream(), true); 
      String request; 
      System.out.print("Enter File Name :"); 



     request=con.readLine(); 
     dout.writeUTF(request); 
     String msg=din.readUTF(); 


     if(msg.compareTo("ERROR")==0) 
     { 
      System.out.println("File not found on Server ..."); 
     return; 
     } 
     else if(msg.compareTo("FOUND")==0)  
    { 
     System.out.println("Receiving File ..."); 
     File f=new File(request); 
     String option; 
     boolean exsists=check(f); 
     if(exsists==true) 
     { 
     String Option; 
      System.out.println("File Already Exists. Want to OverWrite (Y/N) ?"); 

     Option=con.readLine(); 
      if(Option=="N") 
      { 
     dout.flush(); 
      return; 
      } 

     } 


     FileOutputStream fileout=new FileOutputStream(f); 
     int ch; 
     String temp; 
    do 
    { 
     temp=din.readUTF(); 
     ch=Integer.parseInt(temp); 
     if(ch!=-1) 
    { 
    fileout.write(ch);  
    } 
    }while(ch!=-1); 
    fileout.close(); 
    System.out.println(din.readUTF()); 
    System.out.println("success"); 
    } 

Answer 1

在你做，而客户端代码回路，增加System.out.write（）：

do { 
    temp=din.readUTF(); 
    ch=Integer.parseInt(temp); 

    if (ch!=-1) { 
     fileout.write(ch);  
     System.out.write(ch); 
    } 
} while(ch!=-1);