Three ways to read the file (inputStream, BufferedInputStream, FileChannel)

package com.qzl.learn;

import javax.annotation.processing.SupportedSourceVersion;
import java.io.*;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.channels.WritableByteChannel;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class IOTestMain {
    public static void main (String s[]){
        IOTestMain ioTestMain = new IOTestMain();
        ioTestMain.readFileTest();
    }

    public void readFileTest(){
        long time = System.currentTimeMillis();
        File zipFile = new File("C:\\projects\\dbdatafile\\test.rar");
        ZipOutputStream zipOutputStream = null;
        FileOutputStream fileOutputStream = null;
        InputStream inputStream = null;
        ///use buffer
        BufferedInputStream bufferedInputStream = null;
        BufferedOutputStream bufferedOutputStream = null;

        //use file channel
        FileChannel fileChannel = null;
        WritableByteChannel writableByteChannel = null;
        try{
            fileOutputStream = new FileOutputStream(zipFile);
            zipOutputStream = new ZipOutputStream(fileOutputStream);
            for ( int i = 0;i<10;i++){
                File in = new File("C:\\projects\\dbdatafile\\test.txt");
                inputStream = new FileInputStream(in);
                = new new BufferedInputStream BufferedInputStream (inputStream); 
                ZipOutputStream.putNextEntry (the ZipEntry new new ( "Test" + I +. "TXT")); 
                BufferedOutputStream BufferedOutputStream The new new = (ZipOutputStream); 
                FileChannel = ((the FileInputStream) inputStream) .getChannel (); 
                WritableByteChannel = Channels.newChannel (ZipOutputStream); 
                int TEMP = 0; 
// with one of three ways can be a 
                // a first embodiment elapsed time 20+ seconds 
                while (! (temp = inputStream.read ( )) = -1) { 
                    zipOutputStream.write (TEMP); 
                } 
                // second embodiment 0.8+ seconds elapsed time 
                while {((temp = bufferedInputStream.read ( )) = -1!)
                    bufferedOutputStream.write(temp);
                }
                //第三种方式耗时间0.4+秒
                fileChannel.transferTo(0,in.length(),writableByteChannel);
                inputStream.close();
                inputStream = null;
            }
            zipOutputStream.closeEntry();
            zipOutputStream.finish();
        }catch (Exception e){
            System.out.println("1:"+e.getStackTrace());
        }finally {
            try{
                if (fileOutputStream != null ){
                    fileOutputStream.close();
                }
            }catch (Exception e){
                System.out.println("2:"+e.getStackTrace());
            }
            try{
                if (zipOutputStream != null){
                    zipOutputStream.close();
                }
            }catch (Exception e){
                System.out.println("3:"+e.getStackTrace());
            }
            try{
                if (bufferedOutputStream != null){
                    bufferedOutputStream.close();
                }
            }catch (Exception e){
                System.out.println("3.1:"+e.getStackTrace());
            }
            try{
                if (writableByteChannel != null && writableByteChannel.isOpen()){
                    writableByteChannel.close();
                }
            }catch (Exception e){
                System.out.println("3.2:"+e.getStackTrace());
            }
            try{
                if (inputStream != null){
                    inputStream.close();
                }
            }catch (Exception e){
                System.out.println("4:"+e.getStackTrace());
            }
            try{
                if (bufferedInputStream != null){
                    bufferedInputStream.close();
                }
            }catch (Exception e){
                System.out.println("5:"+e.getStackTrace());
            }
            try{
                if (fileChannel != null && fileChannel.isOpen()){
                    fileChannel.close();
                }
            }catch (Exception e){
                System.out.println("5:"+e.getStackTrace());
            }
        }
        printTimeCost(time);
    }
    private void printTimeCost(long timestart){
        long timeNow = System.currentTimeMillis();
        System.out.println("cost Time is : " + (timeNow -timestart));
    }
}