시소당

자바 !!FileInputStream,FileOutputStream,InputStreamReader,bufferedWriter,bufferedR

!!FileInputStream,FileOutputStream,InputStreamReader,bufferedWriter,bufferedReader,URL
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복사

import  java.io.*;

class    FileCopyTest
{
  public  static  void  main(String[]  args)
  {
    try{
    FileInputStream  fis  =  new  FileInputStream  ("sing.jpg")  ;
    FileOutputStream  fos  =  new  FileOutputStream  ("sing1.jpg");
    int  n  =  0;
    while  ((n=fis.read())!=-1)
    {
      fos.write(n);
    }
    fos.close();
    fis.close();
    
    }catch(Exception  e){}
  }
}
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다른  복사

import  java.io.*;

class    FileCopyTest1
{
  public  static  void  main(String[]  args)
  {
    try{
    byte[]  bt  =  new  byte[1024];

    FileInputStream  fis  =  new  FileInputStream  ("sing.jpg")  ;
    FileOutputStream  fos  =  new  FileOutputStream  ("sing21.jpg");
    
    
    int  i;
    while((i=fis.read(bt))!=-1)  fos.write  (bt,0,i);
    fos.close();
    fis.close();
    
    }catch(Exception  e){}
  }
}
==================================================
txt파일을  화면에  출력

import  java.io.*;
class    InputStreamReaderTest
{
  public  static  void  main(String[]  args)
  {
    try{
    InputStreamReader  isr  =  new  InputStreamReader(new  FileInputStream("InputStreamReaderTest.java"));
    int  i=0;
    while((i=isr.read  ())!=-1){
      System.out.print((char)i);
    }

    }catch(Exception  e){}

  }
}
============================================
BufferedReader를  이용하고  bufferedWriter를사용하여  파일복사

import  java.io.*;
class    BufferedReaderTest
{
  public  static  void  main(String[]  args)
  {
    try{
      int  i;
      BufferedReader  br  =  new  BufferedReader(  new  InputStreamReader(new  FileInputStream("InputStreamReaderTest.java")));
      BufferedWriter  bw  =  new  BufferedWriter  (new  OutputStreamWriter(new  FileOutputStream("a1.java")));
      
      String  line  =  null;

      while((line=br.readLine())!=null){  
        bw.write  (line,0,line.length());
        bw.newLine();
      }
      bw.close();
      br.close();

    }catch(Exception  e){}

  }
}
=====================================================
url객채  생성
inputstream  을  얻는다
inputstreamreader  얻는다
bufferedreader  생성
readline으로  모니터  출력

url로
url커낵션
===================================================
url  에  해당하는  html  카피

import  java.net.*;
import  java.io.*;

class    URLTest
{
  public  static  void  main(String[]  args)
  {
    try{
      int  i;
    URL  url  =  new  URL("http://www.yahoo.co.kr/");
    URLConnection  uc  =  url.openConnection  ();
    InputStream  is  =  uc.getInputStream  ();
    
    BufferedReader  br  =  new  BufferedReader(  new  InputStreamReader(is));
    BufferedWriter  bw  =  new  BufferedWriter  (new  OutputStreamWriter(new  FileOutputStream("a.html")));
    String  line  =  null;
    while((line=br.readLine())!=null){
      //System.out.println(line);
      bw.write  (line,0,line.length());
      bw.newLine();
    }
    bw.close();

    }catch(Exception  e){}

  }
}
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숙제
url  이미지  가지고와서  저장하기

==============================================

import  java.io.*;
import  java.net.*;

class  GetURLImage
{
  public  static  void  main(String[]  args)
  {
    try{
      URL  url  =  new  URL("http://wstatic.naver.com/w/n_c600.gif");
      URLConnection  uc  =  url.openConnection  ();
      InputStream  is  =  uc.getInputStream  ();
      
      BufferedInputStream  bs  =  new  BufferedInputStream(is);
      
      FileOutputStream  fos  =  new  FileOutputStream  ("a.gif");
      
      int  n  =  0;
      while  ((n=bs.read())!=-1)
      {
        fos.write(n);
      }
      fos.close();


    }catch(Exception  e){}
  }
}

출처  3/30(금)  자바  !!FileInputStream,FileOutputStream,InputStreamReader,bufferedWriter,bufferedReader,URL,이미지저장|작성자  네이아

http://blog.naver.com/akswnsjd1?Redirect=Log&logNo=60035696037