Process Stream _ Buffer stream

1 can improve the efficiency of file operation compared with node stream

2 Flush operation outputs the remaining string in the last cache

 Packagelianxi1;ImportJava.io.BufferedInputStream;ImportJava.io.BufferedOutputStream;ImportJava.io.BufferedReader;ImportJava.io.BufferedWriter;ImportJava.io.File;ImportJava.io.FileInputStream;ImportJava.io.FileOutputStream;ImportJava.io.FileReader;ImportJava.io.FileWriter;Importjava.io.IOException;Importorg.junit.Test; Public classtestbuffered {@Test Public voidtestcopy () {LongStart =System.currenttimemillis (); String src= "D:/io/plan.png"; String des= "Prison.png";    CopyFile (Src,des); LongEnd =System.currenttimemillis (); System.out.println (End-start);}  Public voidCopyFile (String src,string des) {FileInputStream fis=NULL; FileOutputStream Fos=NULL; Bufferedinputstream bis=NULL; Bufferedoutputstream Bos=NULL; File file1=NewFile (SRC); File file2=NewFile (DES); Try{FIS=NewFileInputStream (FILE1); FOS=NewFileOutputStream (file2); Bis=NewBufferedinputstream (FIS); Bos=NewBufferedoutputstream (FOS); intLen; 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 blockE.printstacktrace (); }        }        if(bos!=NULL){            Try{bos.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); } }} @Test Public voidtest2 () {FileReader fr=NULL; FileWriter FW=NULL; BufferedReader BR=NULL; BufferedWriter BW=NULL; File file1=NewFile ("D:/io/hellotext.txt"); File file2=NewFile ("Tangshan"); Try{FR=NewFileReader (FILE1); FW=NewFileWriter (file2); BR=NewBufferedReader (FR); Bw=NewBufferedWriter (FW);//int len;//char[] C = new char[100];//While ((Len=br.read (c))!=-1) {//Bw.write (c, 0, Len);//Bw.flush ();//        }        //or using the ReadLine methodString 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 blockE.printstacktrace (); }        }        if(bw!=NULL){            Try{bw.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }        }    }}}

Process Stream _ Buffer stream