Java InputStreamReader and Outputstreamwriter__java

Java InputStreamReader and OutputStreamWriter InputStreamReader

InputStreamReader is a bridge of byte flow to character streams: it reads bytes using the specified charset and decodes them into characters. The character set it uses can be specified by name or explicitly given, or the platform default character set can be accepted.

Construction method

Construction Method	Description
InputStreamReader (InputStream in)	Create a inputstreamreader that uses the default character set
InputStreamReader (InputStream in, String CharsetName)	Create a inputstreamreader using the specified character set

Method

Method	Description
GetEncoding ()	Returns the name of the character encoding used by this stream
Read ()	Read a single character
Read (char[] cbuf, int offset, int length)	To read a character into a part of an array
Close ()	Closes the stream and releases all resources associated with it

OutputStreamWriter

OutputStreamWriter is a bridge of character flow to byte streams: You can encode bytes into characters that you specify charset to write to the stream. The character set it uses can be specified by name or explicitly given, otherwise the platform default character set will be accepted.

Construction method

Construction Method	Description
OutputStreamWriter (OutputStream out)	Create a outputstreamwriter that uses the default character encoding
OutputStreamWriter (OutputStream out, String charsetname)	Create a outputstreamwriter using the specified character set

Method

Method	Description
GetEncoding ()	Returns the name of the character encoding used by this stream
Write (int c)	Write a single character
Write (char[] cbuf, int off, int len)	Writes to a part of a character array
Write (String str, int off, int len)	Write to a part of a string
Close ()	Close this stream, but first refresh it

Copy File Example

inputstreamreader input = null;

OutputStreamWriter output = null;
    try {//create the input output stream and make the character encoding set input = new InputStreamReader (New FileInputStream ("E:/readme.txt"), "Utf-8");

    Output = new OutputStreamWriter (New FileOutputStream ("D:/temp.txt"), "Utf-8");
    char[] buffer = new char[1024 * 8];

    int Len;
    Read and write data while (len = input.read (buffer) > 0) {output.write (buffer, 0, Len);
    //Be sure to refresh to ensure that all data in the buffer is written to the file Output.flush ();
System.out.println ("done.");
        The catch (IOException e) {try {//Close input stream if (input!= null) {input.close ();
    } catch (IOException E2) {e.printstacktrace ();
            Finally {try {//Turn off output stream if (output!= null) {output.close ();
        } catch (IOException E3) {e.printstacktrace (); } 
    }
}