Java文件拷贝

package com.lxm.demos;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Writer;

import java.util.Scanner;

public class FileDemo
{
    public static void main(String[] args) throws Exception{

        File file = new File("C:/lxm01.txt");
        File file02 = new File("C:/lxm2.txt");
        if(file.exists()==false)
        {
            file.createNewFile();
        }

//方法一：
/*      InputStream is = new FileInputStream(file);
        Reader isr = new InputStreamReader(is);
        BufferedReader br = new BufferedReader(isr);

        OutputStream os = new FileOutputStream(file02);
        Writer osw = new OutputStreamWriter(os);
        BufferedWriter bw = new BufferedWriter(osw);
        String line = null;
        while((line=br.readLine())!=null)
        {
            bw.write(line);
            bw.newLine();
            System.out.println(line);
        }
        br.close();
        bw.flush();
        bw.close();*/

//方法二：
        Scanner scanner = new Scanner(file);
        PrintWriter pWriter = new PrintWriter(file02);
        String line = null;

        while(scanner.hasNext())
        {
            line = scanner.next();
            pWriter.println(line);
            System.out.println(line);
        }

        if(scanner!=null)
        {
            scanner.close();
        }

        if(pWriter!=null)
        {
            pWriter.flush();
            pWriter.close();
        }

    }
}