[Java] Java复制文件常用的三种方法

package com.tiger.io;
import java.io.*;
import java.nio.file.*;
/**
 * 复制文件的三种方式
 * @author tiger
 * @date 
 */
public class copyfile {
 public static void main(string[] args) throws ioexception, ioexception {
 path path = paths.get("e:","17-06-15-am1.avi");
 string dest = "e:\\copy电影.avi";
 copy01(path, dest);
 string src = "e:\\[java典型应用彻查1000例：java入门].pdf";
 string dest1 = "e:\\copyfile.pdf";
 copy02(src, dest1);
 //copy03(src, dest1);
 }
 
 /**
 * 利用files工具copy
 * @param path
 * @param dest
 * @throws ioexception
 * @throws ioexception
 */
 public static void copy01(path path,string dest) throws ioexception, ioexception{
 //利用files工具类对文件进行复制,简化编程，只需要写一句。
 files.copy(path, new fileoutputstream(dest));
 }
 
 /**
 * 利用字节流复制
 * @param src
 * @param dest
 * @throws ioexception
 */
 public static void copy02(string src,string dest) throws ioexception{
 inputstream is = new bufferedinputstream(new fileinputstream(src));
 outputstream os = new bufferedoutputstream(new fileoutputstream(dest));
 //文件拷贝u，-- 循环+读取+写出
 byte[] b = new byte[10];//缓冲大小
 int len = 0;//接收长度
 //读取文件
 while (-1!=(len = is.read(b))) {
  //读入多少，写出多少，直到读完为止。
  os.write(b,0,len);
 }
 //强制刷出数据
 os.flush();
 //关闭流，先开后关
 os.close();
 is.close();
 }
 
 /**
 * 字符流复制
 * @param src
 * @param dest
 * @throws ioexception
 */
 public static void copy03(string src,string dest) throws ioexception{
 //字符输入流
 bufferedreader reader = new bufferedreader(new filereader(src));
 //字符输出流
 bufferedwriter writer = new bufferedwriter(new filewriter(dest));
 char[] cbuf = new char[24];
 int len = 0;
 //边读入边写出
 while ((len = reader.read(cbuf)) != -1) {
  writer.write(cbuf, 0, len);
 }
 //关闭流
 writer.close();
 reader.close();
 }
}