输入输出字节流

读入：------------------------------------------------------InputStream

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

 

public class InputStream_ {

     public static void main(String[] args) {

          File src = new File("D:/javac/1.txt");

          FileInputStream is = null ;

          try {

               is = new FileInputStream(src);

               byte[] car = new byte[10];

               int len = 0;

               while(-1!=(len=is.read(car))) {

                    String s = new String(car, 0, len);

                    System.out.println(s);

               }

          } catch (Exception e) {

               e.printStackTrace();

          } finally {

               if(null != is) {

                    try {

                         is.close();

                    } catch (IOException e) {

                         e.printStackTrace();

                    }

               }

          }

     }

}

写出：------------------------------------------------------OutputStream

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

 

public class OutputStream_ {

       public static void main(String[] args) {

            File destination = new File( "d:/javac/1.txt" );

            OutputStream os = null ;

             try {

                  os = new FileOutputStream(destination, true );

                  String s = "hehehhehehe\t\n" ;

                   byte [] data = s.getBytes();

                  os.write(data, 0, data. length );

                  os.flush();

            } catch (FileNotFoundException e) {

                  e.printStackTrace();

            } catch (IOException e) {

                  e.printStackTrace();

            } finally {

                   if (os!=null ) {

                         try {

                               os.close();

                        } catch (IOException e) {

                              e.printStackTrace();

                        }

                  }

            }

      }

}