Use BufferedReader and InputStream together

问题:

I use a BufferedReader to read lines from an InputStream. When I read something directly from the InputStream, the BufferedReader ignores my read and continues reading at the same location. Is it possible to prevent this behavior? If not what is a good practice to do this?

PS: Here's my code:

byte[] ba = new byte[1024*1024];
int off = 0;
int len = 0;
do {
    len = Integer.parseInt(br.readLine());
    in.read(ba, off, len);
    br.readLine();
    off += len;
} while(len > 0);

in is my inputstream and br my bufferedreader.

回答1:

If not what is a good practice to do this?

This is not a good approach to read by 2 stream at a time for same file. You have to use just one stream.

BufferedReader is used for character stream whereas InputStream is used for binary stream.

A binary stream doesn't have readLine() method that is only available in character stream.

回答2:

Reading from a BufferedReader and an InputStream at the same time is not possible. If you need binary data, you should use multiple readLine() calls.

Here's my new code:

byte[] ba = new byte[1024*1024];
int off = 0;
int len = 0;
do {
    len = Integer.parseInt(br.readLine().split(";" , 2)[0],16);
    for (int cur = 0; cur < len;) {
        byte[] line0 = br.readLine().getBytes();
        for (int i = 0; i < line0.length; i++) {
            ba[off+cur+i] = line0[i];
        }
        cur += line0.length;
        if(cur < len) {
            ba[off+cur] = '\n';
            cur++;
        }
    }
    off += len;
} while(len > 0);

回答3:

BufferedReader bufferedReader = null;
try
{
    bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
    String line = null;
    while((line = bufferedReader.readLine()) != null)
    {
         //process lines here
    }
}
catch(IOException e)
{
    e.printStackTrace();
}
finally
{
    if(bufferedReader != null)
    {
        try
        {
            bufferedReader.close();
        }
        catch(IOException e)
        {
        }
    }
}