public class PartInputStream
extends java.io.FilterInputStream
PartInputStream filters a ServletInputStream,
providing access to a single MIME part contained with in which ends with
the boundary specified. It uses buffering to provide maximum performance.
Note the readLine method of ServletInputStream
has the annoying habit of adding a \r\n to the end of the last line. Since
we want a byte-for-byte transfer, we have to cut those chars. This means
that we must always maintain at least 2 characters in our buffer to allow
us to trim when necessary.
| 限定符和类型 | 方法和说明 |
|---|---|
int |
available()
Returns the number of bytes that can be read from this input stream
without blocking.
|
void |
close()
Closes this input stream and releases any system resources
associated with the stream.
|
int |
read()
See the general contract of the
read
method of InputStream. |
int |
read(byte[] b)
See the general contract of the
read
method of InputStream. |
int |
read(byte[] b,
int off,
int len)
See the general contract of the
read
method of InputStream. |
public int read()
throws java.io.IOException
read
method of InputStream.
Returns -1 (end of file) when the MIME
boundary of this part is encountered.
read 在类中 java.io.FilterInputStream-1 if the end of the
stream is reached.java.io.IOException - if an I/O error occurs.public int read(byte[] b)
throws java.io.IOException
read
method of InputStream.
Returns -1 (end of file) when the MIME
boundary of this part is encountered.
read 在类中 java.io.FilterInputStreamb - the buffer into which the data is read.-1 if there is no more data because the end
of the stream has been reached.java.io.IOException - if an I/O error occurs.public int read(byte[] b,
int off,
int len)
throws java.io.IOException
read
method of InputStream.
Returns -1 (end of file) when the MIME
boundary of this part is encountered.
read 在类中 java.io.FilterInputStreamb - the buffer into which the data is read.off - the start offset of the data.len - the maximum number of bytes read.-1 if there is no more data because the end
of the stream has been reached.java.io.IOException - if an I/O error occurs.public int available()
throws java.io.IOException
InputStream idiom
to deal with buffering gracefully, and is not same as the length of the
part arriving in this stream.available 在类中 java.io.FilterInputStreamjava.io.IOException - if an I/O error occurs.public void close()
throws java.io.IOException
This method will read any unread data in the MIME part so that the next
part starts an an expected place in the parent InputStream.
Note that if the client code forgets to call this method on error,
MultipartParser will call it automatically if you call
readNextPart().
close 在接口中 java.io.Closeableclose 在接口中 java.lang.AutoCloseableclose 在类中 java.io.FilterInputStreamjava.io.IOException - if an I/O error occurs.Copyright © 2017. All Rights Reserved.