ServletInputStreampublic abstract class ServletInputStream extends InputStream Provides an input stream for reading binary data from a client
request, including an efficient readLine method
for reading data one line at a time. With some protocols, such
as HTTP POST and PUT, a ServletInputStream
object can be used to read data sent from the client.
A ServletInputStream object is normally retrieved via
the {@link ServletRequest#getInputStream} method.
This is an abstract class that a servlet container implements.
Subclasses of this class
must implement the java.io.InputStream.read() method. |
| Constructors Summary |
|---|
protected ServletInputStream()Does nothing, because this is an abstract class.
|
| Methods Summary |
|---|
| public int | readLine(byte[] b, int off, int len)Reads the input stream, one line at a time. Starting at an
offset, reads bytes into an array, until it reads a certain number
of bytes or reaches a newline character, which it reads into the
array as well.
This method returns -1 if it reaches the end of the input
stream before reading the maximum number of bytes.
if (len <= 0) {
return 0;
}
int count = 0, c;
while ((c = read()) != -1) {
b[off++] = (byte)c;
count++;
if (c == '\n" || count == len) {
break;
}
}
return count > 0 ? count : -1;
|
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