[英]No number of bytes received in java
I would like to determine the number of bytes downloaded from the following working URL connection: I have following code to implement: 我想确定从以下工作URL连接下载的字节数:我有以下代码来实现:
.......
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream is = connection.getInputStream(); // throws an IOException
DataInputStream dis = new DataInputStream(new BufferedInputStream(is));
FileOutputStream fos = new FileOutputStream("C:\\Picture.jpeg");
int read =0;
byte[] bytes = new byte[1024];
while((read = dis.read(bytes)) != -1)
{
fos.write(bytes, 0, read);
}
System.out.println(read + " byte(s) copied");
The output from the last line is as follows: 最后一行的输出如下:
Opening connection to http://www.xyz.com//Picture.jpeg...
Copying image resource (type: application/jpeg, modified on: 02/02/2010 4:19:21 AM)...
-1 byte(s) copied
What is the error of my code. 我的代码有什么错误? please help me
请帮我
int read =0;
int reddit = 0;
byte[] bytes = new byte[1024];
while((read = dis.read(bytes)) != -1)
{
fos.write(bytes, 0, read);
reddit += read;
}
//your read variable must have the value -1 at this point
System.out.println(reddit + " byte(s) copied");
int totalBytes = 0;
...
while((read = dis.read(bytes)) != -1)
{
totalBytes += read;
fos.write(bytes, 0, read);
}
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