使用套接字上传Java文件，需要上传文件的百分比？

Question

你好，我正在使用套接字将文件上传到服务器，我需要加载文件的百分比？我该怎么做？我有最大值，即文件长度，我如何获得已上传的文件量？

FileInputStream fis = new FileInputStream(fil);
                BufferedInputStream in = new BufferedInputStream(fis);
                BufferedOutputStream out = new BufferedOutputStream(skt.getOutputStream());

                //Write the file to the server socket           
                int i;

                while ((i = in.read()) != -1) {
                    publishProgress(???);
                    out.write(i);                   
                    System.out.println(i);
                }

我需要在 publishProgress 方法中传递上传文件的长度。

Answer 1

使用缓冲复制

FileInputStream fis = new FileInputStream(fil);
BufferedInputStream in = new BufferedInputStream(fis);
BufferedOutputStream out = new BufferedOutputStream(skt.getOutputStream());

//Write the file to the server socket
int i;
int written = 0;
byte[] buf = new byte[512];

while ((i = in.read(buff)) != -1) {  

    out.write(buff,0,i);
    written += i;
    publishProgress((double)written/length);
    //passing a double value from 0-1 to say how much is transmitted (length is length of file)
    System.out.println(buff+", "+i);
}