文件拷贝：文件字节输入、输出流

文件拷贝：文件字节输入、输出流

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * 文件拷贝：文件字节输入、输出流
 *
 * 
 *
 */
public class Copy {

	public static void main(String[] args) {
		long t1 = System.currentTimeMillis();
		copy("IO开篇.mp4","IO-copy.mp4"); 
		long t2 = System.currentTimeMillis();
		System.out.println(t2-t1);
	}
	
	public static void copy(String srcPath,String destPath) {
		//1、创建源
			File src = new File(srcPath); //源头
			File dest = new File(destPath);//目的地
			//2、选择流		
			try( InputStream is=new BufferedInputStream(new FileInputStream(src));
					OutputStream os =new BufferedOutputStream( new FileOutputStream(dest));	) {				
				//3、操作 (分段读取)
				byte[] flush = new byte[1024]; //缓冲容器
				int len = -1; //接收长度
				while((len=is.read(flush))!=-1) {
					os.write(flush,0,len); //分段写出
				}			
				os.flush();
			}catch(FileNotFoundException e) {		
				e.printStackTrace();
			}catch (IOException e) {
				e.printStackTrace();
			}
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

/**
 * 文件拷贝：文件字节输入、输出流
 *
 *
 *
 */
public class CopyTxt {

	public static void main(String[] args) {
		copy("abc.txt","abc-copy.txt"); 
	}	
	public static void copy(String srcPath,String destPath) {
		//1、创建源
			File src = new File(srcPath); //源头
			File dest = new File(destPath);//目的地
			//2、选择流		
			try( BufferedReader br=new BufferedReader(new FileReader(src));
					BufferedWriter bw =new BufferedWriter( new FileWriter(dest));	) {				
				//3、操作 (逐行读取)
				String line =null;
				while((line=br.readLine())!=null) {
					bw.write(line); //逐行写出
					bw.newLine();
				}			
				bw.flush();
			}catch(FileNotFoundException e) {		
				e.printStackTrace();
			}catch (IOException e) {
				e.printStackTrace();
			}
	}
}