利用套接字在两人之间传文件。（文件接受方的接受目录要先创建） 文件发送方： import java.net.*; import java.io.*; public class SendFile extends Thread{      byte byteBuffer[]= new byte[1024];      RandomAccessFile outFile;      ServerSocket serSocket;      OutputStream outSocket;      Socket tempSocket;      public static void main(String args[]){        SendFile sf=new SendFile();        sf.start();        System.out.println("wait for...");       }       public SendFile(){         try{              outFile = new RandomAccessFile("33.zip","r");              serSocket = new ServerSocket(9090);                      }catch(Exception e){}       }                  public void run(){                     try{                        tempSocket=serSocket.accept();                        outSocket=tempSocket.getOutputStream();                                                int amount;                                                     while((amount = outFile.read(byteBuffer)) != -1){                                    outSocket.write(byteBuffer, 0, amount);                             }                         System.out.println("Send File complete");                         outFile.close();                         tempSocket.close();                         serSocket.close();                        }catch(IOException e){}                              }   } 文件接受方（test目录要先创建） import java.net.*; import java.io.*; public class GetFile extends Thread{      byte byteBuffer[]= new byte[1024];      Socket tempSocket;      RandomAccessFile inFile;      InputStream inSocket;                                                        public static void main(String args[]){        GetFile gf=new GetFile();        gf.start();        System.out.println("get it...");       }       public GetFile(){         try{              inFile=new  RandomAccessFile("test/33.zip","rw");              tempSocket = new Socket("127.0.0.1",9090);              inSocket= tempSocket.getInputStream();         }catch(Exception e){}       }                  public void run(){                        int amount;                        try{                            while((amount =inSocket.read(byteBuffer) )!= -1){                               inFile.write(byteBuffer, 0, amount);                             }                         inSocket.close();                         System.out.println("Get OK");                         inFile.close();                         tempSocket.close();                        }catch(IOException e){}                              }   } 来源： java学习室

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