使用FileInputStream / ObjectOutputStream发送大文件 [英] Sending big file using FileInputStream/ObjectOutputStream

问题描述

我的作业需要帮助，非常感谢任何帮助。我可以毫无问题地发送小文件。但是当我尝试发送时，假设一个1GB的文件字节数组发送OutOfMemoryError，所以我需要一个更好的解决方案来将文件从服务器发送到客户端。如何改进此代码并发送大文件，请帮助我。

I need help on my homework, any help will be much appreciated. I can send small files without a problem. But when i try to send let’s say a 1GB file byte array sends OutOfMemoryError so i need a better solution to send file from server to client. How can i improve this code and send big files, please help me.

服务器代码：

    FileInputStream fis = new FileInputStream(file);
    byte[] fileByte = new byte[fis.available()]; //This causes the problem.
    bytesRead = fis.read(fileByte);
    oos = new ObjectOutputStream(sock.getOutputStream());
    oos.writeObject(fileByte);

客户代码：

    ois = new ObjectInputStream(sock.getInputStream());
    byte[] file = (byte[]) ois.readObject();
    fos = new FileOutputStream(file);
    fos.write(file);

推荐答案

以下是我解决的方法：

客户代码：

 bis=new BufferedInputStream(sock.getInputStream());
 fos = new FileOutputStream(file);
 int n;
 byte[] buffer = new byte[8192];
 while ((n = bis.read(buffer)) > 0){
 fos.write(buffer, 0, n);}

服务器代码：

 bos= new BufferedOutputStream(sock.getOutputStream());
 FileInputStream fis = new FileInputStream(file);
 BufferedInputStream bis = new BufferedInputStream(fis);
 int n=-1;
 byte[] buffer = new byte[8192];
 while((n = bis.read(buffer))>-1) 
 bos.write(buffer,0,n);

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