"Conversion stream OutputStreamWriter and inputstreamreader for JAVA io streams"

The bottom of the Java character Stream is also implemented using a byte stream, so the byte stream is converted to a character stream at a time. The conversion stream is mainly used tooutputstreamwriter: Convert byte output stream to character output stream formInputStreamReader: Converts the input byte stream into a character stream input form

1.outputstreamwriter (byte output stream---character output stream)
OutputStreamWriter is a bridge of bytes flowing to a character stream. If you do not specify a character set encoding, the decoding process uses the default character encoding of the platform
Construction Method:outputstreamwriter os = new OutputStreamWriter (outputstream out);//Constructs a default encoding setoutputstreamwriter os= New OutputStreamWriter (OutputStream out,string charsetname);// Constructs a OutputStreamWriter class that specifies the encoding set. Example code:

2. public static void Main (string[] args) {
   
4. 
   
6. try {
   
8. Building a byte output stream
   
10. OutputStream os=new FileOutputStream ("L:\\test.txt");
    
12. 
    
14. String datastring= "Study hard and keep up!" ";
    
16. Creating a character output stream from a byte output stream
    
18. Writer w=new outputstreamwriter (OS);
    
20. W.write (datastring);//Output to File
    
22. Close the stream
    
24. W.close ();
    
26. Os.close ();
    
28. } catch (FileNotFoundException e) {
    
30. E.printstacktrace ();
    
32. } catch (IOException e) {
    
34. TODO auto-generated Catch block
    
36. E.printstacktrace ();
    
38. }
    
40. 
    
42. }

Copy Code 2.inputstreamreader (byte input stream--character input stream)
InputStreamReader converts a byte stream to a character stream. is a bridge of bytes flowing to a character stream. If you do not specify a character set encoding, the decoding process uses the default character encoding for the platform.
Construction Method:InputStreamReader ISR = new InputStreamReader (InputStream in);//Constructs a default encodingInputStreamReader ISR = new InputStreamReader (InputStream in,string charsetname);//Constructs a InputStreamReader class that specifies the encoding set.
Example code:

2. public static void Main (string[] args) {
   
4. 
   
6. try {
   
8. Building a byte input stream
   
10. InputStream is=new FileInputStream ("L:\\test.txt");
    
12. Building character input streams through byte input streams
    
14. Reader r=new InputStreamReader (IS);
    
16. By the way, use the buffer stream.
    
18. BufferedReader br=new BufferedReader (R);
    
20. Read a row of data
    
22. System.out.println (Br.readline ());
    
24. Close the stream
    
26. Br.close ();
    
28. R.close ();
    
30. Is.close ();
    
32. 
    
34. } catch (FileNotFoundException e) {
    
36. E.printstacktrace ();
    
38. } catch (IOException e) {
    
40. E.printstacktrace ();
    
42. }
    
44. 
    
46. }

Copy CodeOperation Result:

"Conversion stream OutputStreamWriter and inputstreamreader for JAVA io streams"