java socket传文件丢失数据???

serversocket程序是这样的,如何解决???非常急,在线等待
import java.net.*; 
import java.util.*;
import java.io.*; 
import java.text.*;
import java.lang.*;
import com.conf.Dbaccess;
import com.conf.*;
import com.file.FileList;
import com.file.ReadXML;
class serverThread extends Thread { 

Socket clientRequest; 
//用户连接的通信套接字 
BufferedReader input; //输入流 
PrintWriter output; //输出流 

public serverThread(Socket s) 

{ //serverThread的构造器 
this.clientRequest=s; 

        int port; 
        ServerSocket serverSkt; 
        Socket clientSkt; 
        BufferedReader fileInfo; 
        BufferedInputStream fileReader; 
        BufferedOutputStream fileWriter; 
        String fileName; 
        PrintStream printStream;
//接收receiveServer传来的套接字 
InputStreamReader reader; 
OutputStreamWriter writer; 
          try {  //接收客户机连接请求 
                printStream = new PrintStream(clientRequest.getOutputStream());                  fileInfo = new BufferedReader(new InputStreamReader(clientRequest.getInputStream())); 
                fileName = fileInfo.readLine(); 
                System.out.println("与" + clientRequest.getInetAddress() + "建立连接"); 
                printStream.println("yes");
                System.out.print("\nOK! 正在接收文件 " + fileName); 
String szfilename="";
if(fileName.indexOf("/")>0){
szfilename= fileName.substring(fileName.lastIndexOf("/")+1,fileName.length());

                    fileReader = new BufferedInputStream(clientRequest.getInputStream()); 
                    fileWriter = new BufferedOutputStream(new FileOutputStream("d:\\test\\"+szfilename)); 
                    int readin; 
                    while((readin = fileReader.read()) != -1) { 
                        //System.out.print("."); 
                        fileWriter.write(readin); 
                    } 
                    fileReader.close(); 
                    fileWriter.flush(); 
                    clientRequest.close(); 
                    System.out.println("\n文件接收完毕！"); 
  }
        } 
        catch(IOException e) { 
            System.out.println(e.toString()); 
        } 
}
}
}