package lianxi1;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import org.junit.Test;public class TestBuffered {@Test public void testCopy(){    long start = System.currentTimeMillis();    String src = "d:/io/plan.png";    String des = "prison.png";    copyFile(src,des);    long end = System.currentTimeMillis();    System.out.println(end-start);}  public void copyFile(String src,String des){    FileInputStream fis = null;    FileOutputStream fos = null;    BufferedInputStream bis = null;    BufferedOutputStream bos = null;    File file1 = new File(src);    File file2 = new File(des);    try{        fis = new FileInputStream(file1);        fos = new FileOutputStream(file2);        bis = new BufferedInputStream(fis);        bos = new BufferedOutputStream(fos);        int len;        byte[] b = new byte[100];        while((len=bis.read(b))!=-1){            bos.write(b, 0, len);            bos.flush();        }    }catch(Exception ex){ex.printStackTrace();}    finally{        if(bis!=null){            try {                bis.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }        if(bos!=null){            try {                bos.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }    }}@Test   public void test2(){    FileReader fr = null;    FileWriter fw = null;    BufferedReader br = null;    BufferedWriter bw = null;    File file1 = new File("d:/io/hellotext.txt");    File file2 = new File("Tangshan");    try{        fr = new FileReader(file1);        fw = new FileWriter(file2);        br = new BufferedReader(fr);        bw = new BufferedWriter(fw);//        int len;//        char[] c = new char[100];//        while((len=br.read(c))!=-1){//            bw.write(c, 0, len);//            bw.flush();//        }        //或用readline方法        String str;        while((str=br.readLine())!=null){            bw.write(str);            bw.newLine();        }    }catch(Exception ex){ex.printStackTrace();}    finally{        if(br!=null){            try {                br.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }        if(bw!=null){            try {                bw.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }    }}}