我正在尝试继续从服务器到客户端的中断下载。
发送服务器代码:
long fileLength = file.length();
String fileName = file.getName();
int bytesRead = 0;
long bytesReadAmount = 0;
byte[] byteArray = new byte[6 * PACKET_SIZE];
OutputStream outputStream = socket.getOutputStream();
try {
BufferedInputStream bufferedIS = new BufferedInputStream(new FileInputStream(file));
while ((bytesRead = bufferedIS.read(byteArray)) > 0) {
outputStream.write(byteArray, (int)existingFileSize, bytesRead);
bytesReadAmount += bytesRead;
System.out.println("File sending " + fileName + " (send" + bytesReadAmount + " byte, remain " +
(fileLength - bytesReadAmount));
}
System.out.println("File transfer end");
} catch (IOException e) {
System.out.println("File transfer error");
e.printStackTrace();
} finally {
dataOS.flush();
socket.close();
}
接收的客户端代码
long bytesReadAmount = 0;
int bytesRead = 0;
long size = 0;
byte[] byteArray = new byte[6 * Server.PACKET_SIZE];
try {
File file = new File(DIRECTORY_PATH + fileName);
file.createNewFile();
FileOutputStream fileOS = new FileOutputStream(file);
BufferedOutputStream bufferedOS = new BufferedOutputStream(fileOS);
while ((bytesRead = dataIS.read(byteArray)) != -1) {
bufferedOS.write(byteArray, (int)existingFileSize, bytesRead);
bytesReadAmount += bytesRead;
System.out.println("File receiving " + fileName + " (" + bytesReadAmount + " bytes received)");
}
System.out.println("File " + fileName + " sending OK");
} catch (IOException e) {
System.out.println("Connection interrupted");
e.printStackTrace();
}
}
从头到尾发送的大文件效果很好,但是在interrut没有后继续下载(当我试图继续中断文件时发送不工作)。此外,当我发送完整文件时,副本的大小与某些字节的原始大小不同。请帮助解决这个问题
答案 0 :(得分:2)
offset
中使用的write(byteArray, (int)existingFileSize, bytesRead)
是byteArray
中的偏移,而不是原始文件。我建议您在重新启动时使用skip()
跳过要读取或写入的数据,并将追加添加到文件中(通过在FileOutputStream构造函数中设置append)