通过socket完成zip文件的网络传输，但是传输过去会出现文件损坏。

遇到的问题：我定义了一个字节数组data: byte[]，用来暂存读取的字节数据, 当这个字节数组的大小设置为8192时传输的文件没有问题，8192字节应该是BufferedInputStream和BufferedOutputStream的默认缓存大小。当我吧这个字节数组的大小定义为非8192的数时传输的文件就会出现文件损坏，使用BufferedInputStream(socket.getInputStream(), databig);和BufferedOutputStream(socket.getOutputStream, databig);这两个构造函数时应该已经把默认的缓存大小更改了，但是传输依然出现文件损坏。到这里我就不知道是哪里出错了，如果是因为缓存大小与我定义的字节数组大小不合适的话，那在我修改默认缓存大小后应该能正常传输才对，但是并非如此。请求大神讲解一下，谢谢。


接收端代码：
import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Receive {
final static String name = "E:\\2.zip";//接收文件储存位置
final static int port = 9999;
final static int databig = 8192;

public static void main(String[] args){
File file = new File(name);
byte[] data = new byte[databig];
long big = 0;
long count = 0;

try {
ServerSocket server = new ServerSocket(port);
System.out.println("等待发送端连接");
Socket socket = server.accept();
System.out.println("连接成功");
file.createNewFile();
FileOutputStream out = new FileOutputStream(file);
BufferedInputStream in = new BufferedInputStream(socket.getInputStream(), databig);
DataInputStream in2 = new DataInputStream(socket.getInputStream());
//接收文件大小
big = in2.readLong();
System.out.println(big);

while(true)
{
in.read(data, 0, data.length);
out.write(data, 0, data.length);
System.out.println((count*1.0/big*1.0)*100);
count+=databig;
}
}
catch (Exception e) {
System.out.println(e.toString());
}
System.out.println("接收成功");
}
}

发送端代码：
import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.Socket;

public class Send {
final static String name = "E:\\2.zip";
final static String ip = "19.168.43.01";
final static int port = 9999;
final static int filebig = 8192;

public static void main(String[] args) {
File file = new File(name);
long big = file.length();
System.out.printf("文件总大小(Byte): ");
System.out.println(big);
byte[] data = new byte[filebig];
long count = 0;

try {
Socket socket = new Socket(ip, port);
FileInputStream in = new FileInputStream(file);
BufferedOutputStream out = new BufferedOutputStream(socket.getOutputStream(), filebig);
DataOutputStream out2 = new DataOutputStream(socket.getOutputStream());
//发送文件大小
out2.writeLong(big);
out2.flush();

while(in.read(data, 0, data.length) != -1)
{
System.out.printf("发送文件百分比：");
System.out.println((count*1.0/big*1.0)*100);
out.write(data, 0, data.length);
out.flush();
count+=filebig;
}

System.out.println("发送成功");
}
catch (Exception e) {
e.printStackTrace();
}
}
}